mirror of
https://github.com/sheumann/hush.git
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4953 lines
88 KiB
C
4953 lines
88 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Minix shell port for busybox
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*
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* This version of the Minix shell was adapted for use in busybox
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* by Erik Andersen <andersen@codepoet.org>
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*
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* - backtick expansion did not work properly
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* Jonas Holmberg <jonas.holmberg@axis.com>
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* Robert Schwebel <r.schwebel@pengutronix.de>
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* Erik Andersen <andersen@codepoet.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Original copyright notice is retained at the end of this file.
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*/
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#include <ctype.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/times.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "cmdedit.h"
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#include "busybox.h"
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/* -------- sh.h -------- */
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/*
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* shell
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*/
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#define LINELIM 2100
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#define NPUSH 8 /* limit to input nesting */
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#undef NOFILE
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#define NOFILE 20 /* Number of open files */
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#define NUFILE 10 /* Number of user-accessible files */
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#define FDBASE 10 /* First file usable by Shell */
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/*
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* values returned by wait
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*/
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#define WAITSIG(s) ((s)&0177)
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#define WAITVAL(s) (((s)>>8)&0377)
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#define WAITCORE(s) (((s)&0200)!=0)
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/*
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* library and system defintions
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*/
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typedef void xint; /* base type of jmp_buf, for not broken compilers */
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/*
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* shell components
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*/
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#define QUOTE 0200
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#define NOBLOCK ((struct op *)NULL)
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#define NOWORD ((char *)NULL)
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#define NOWORDS ((char **)NULL)
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#define NOPIPE ((int *)NULL)
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/*
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* Description of a command or an operation on commands.
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* Might eventually use a union.
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*/
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struct op {
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int type; /* operation type, see below */
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char **words; /* arguments to a command */
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struct ioword **ioact; /* IO actions (eg, < > >>) */
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struct op *left;
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struct op *right;
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char *str; /* identifier for case and for */
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};
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#define TCOM 1 /* command */
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#define TPAREN 2 /* (c-list) */
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#define TPIPE 3 /* a | b */
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#define TLIST 4 /* a [&;] b */
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#define TOR 5 /* || */
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#define TAND 6 /* && */
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#define TFOR 7
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#define TDO 8
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#define TCASE 9
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#define TIF 10
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#define TWHILE 11
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#define TUNTIL 12
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#define TELIF 13
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#define TPAT 14 /* pattern in case */
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#define TBRACE 15 /* {c-list} */
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#define TASYNC 16 /* c & */
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/*
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* actions determining the environment of a process
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*/
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#define BIT(i) (1<<(i))
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#define FEXEC BIT(0) /* execute without forking */
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/*
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* flags to control evaluation of words
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*/
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#define DOSUB 1 /* interpret $, `, and quotes */
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#define DOBLANK 2 /* perform blank interpretation */
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#define DOGLOB 4 /* interpret [?* */
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#define DOKEY 8 /* move words with `=' to 2nd arg. list */
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#define DOTRIM 16 /* trim resulting string */
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#define DOALL (DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM)
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static char **dolv;
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static int dolc;
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static int exstat;
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static char gflg;
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static int interactive; /* Is this an interactive shell */
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static int execflg;
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static int multiline; /* \n changed to ; */
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static struct op *outtree; /* result from parser */
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static xint *failpt;
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static xint *errpt;
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static struct brkcon *brklist;
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static int isbreak;
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static int newfile(char *s);
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static char *findeq(char *cp);
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static char *cclass(char *p, int sub);
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static void initarea(void);
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extern int msh_main(int argc, char **argv);
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struct brkcon {
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jmp_buf brkpt;
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struct brkcon *nextlev;
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} ;
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/*
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* redirection
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*/
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struct ioword {
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short io_unit; /* unit affected */
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short io_flag; /* action (below) */
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char *io_name; /* file name */
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};
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#define IOREAD 1 /* < */
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#define IOHERE 2 /* << (here file) */
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#define IOWRITE 4 /* > */
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#define IOCAT 8 /* >> */
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#define IOXHERE 16 /* ${}, ` in << */
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#define IODUP 32 /* >&digit */
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#define IOCLOSE 64 /* >&- */
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#define IODEFAULT (-1) /* token for default IO unit */
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static struct wdblock *wdlist;
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static struct wdblock *iolist;
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/*
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* parsing & execution environment
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*/
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static struct env {
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char *linep;
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struct io *iobase;
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struct io *iop;
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xint *errpt;
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int iofd;
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struct env *oenv;
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} e;
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/*
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* flags:
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* -e: quit on error
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* -k: look for name=value everywhere on command line
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* -n: no execution
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* -t: exit after reading and executing one command
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* -v: echo as read
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* -x: trace
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* -u: unset variables net diagnostic
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*/
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static char *flag;
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static char *null; /* null value for variable */
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static int intr; /* interrupt pending */
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static char *trap[_NSIG+1];
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static char ourtrap[_NSIG+1];
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static int trapset; /* trap pending */
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static int heedint; /* heed interrupt signals */
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static int yynerrs; /* yacc */
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static char line[LINELIM];
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static char *elinep;
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/*
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* other functions
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*/
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static int(*inbuilt(char *s))(struct op *);
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static char *rexecve (char *c , char **v, char **envp );
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static char *space (int n );
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static char *strsave (char *s, int a );
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static char *evalstr (char *cp, int f );
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static char *putn (int n );
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static char *itoa (int n );
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static char *unquote (char *as );
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static struct var *lookup (char *n );
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static int rlookup (char *n );
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static struct wdblock *glob (char *cp, struct wdblock *wb );
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static int my_getc( int ec);
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static int subgetc (int ec, int quoted );
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static char **makenv (void);
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static char **eval (char **ap, int f );
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static int setstatus (int s );
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static int waitfor (int lastpid, int canintr );
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static void onintr (int s ); /* SIGINT handler */
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static int newenv (int f );
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static void quitenv (void);
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static void err (char *s );
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static int anys (char *s1, char *s2 );
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static int any (int c, char *s );
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static void next (int f );
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static void setdash (void);
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static void onecommand (void);
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static void runtrap (int i );
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static int gmatch (char *s, char *p );
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/*
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* error handling
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*/
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static void leave (void); /* abort shell (or fail in subshell) */
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static void fail (void); /* fail but return to process next command */
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static void warn (char *s );
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static void sig (int i ); /* default signal handler */
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/* -------- area stuff -------- */
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#define REGSIZE sizeof(struct region)
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#define GROWBY 256
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//#define SHRINKBY 64
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#undef SHRINKBY
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#define FREE 32767
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#define BUSY 0
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#define ALIGN (sizeof(int)-1)
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struct region {
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struct region *next;
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int area;
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};
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/* -------- grammar stuff -------- */
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typedef union {
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char *cp;
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char **wp;
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int i;
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struct op *o;
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} YYSTYPE;
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#define WORD 256
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#define LOGAND 257
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#define LOGOR 258
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#define BREAK 259
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#define IF 260
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#define THEN 261
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#define ELSE 262
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#define ELIF 263
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#define FI 264
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#define CASE 265
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#define ESAC 266
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#define FOR 267
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#define WHILE 268
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#define UNTIL 269
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#define DO 270
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#define DONE 271
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#define IN 272
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#define YYERRCODE 300
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/* flags to yylex */
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#define CONTIN 01 /* skip new lines to complete command */
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#define SYNTAXERR zzerr()
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static struct op *pipeline(int cf );
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static struct op *andor(void);
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static struct op *c_list(void);
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static int synio(int cf );
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static void musthave (int c, int cf );
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static struct op *simple(void);
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static struct op *nested(int type, int mark );
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static struct op *command(int cf );
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static struct op *dogroup(int onlydone );
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static struct op *thenpart(void);
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static struct op *elsepart(void);
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static struct op *caselist(void);
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static struct op *casepart(void);
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static char **pattern(void);
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static char **wordlist(void);
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static struct op *list(struct op *t1, struct op *t2 );
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static struct op *block(int type, struct op *t1, struct op *t2, char **wp );
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static struct op *newtp(void);
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static struct op *namelist(struct op *t );
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static char **copyw(void);
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static void word(char *cp );
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static struct ioword **copyio(void);
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static struct ioword *io (int u, int f, char *cp );
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static void zzerr(void);
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static void yyerror(char *s );
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static int yylex(int cf );
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static int collect(int c, int c1 );
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static int dual(int c );
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static void diag(int ec );
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static char *tree(unsigned size );
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/* -------- var.h -------- */
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struct var {
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char *value;
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char *name;
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struct var *next;
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char status;
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};
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#define COPYV 1 /* flag to setval, suggesting copy */
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#define RONLY 01 /* variable is read-only */
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#define EXPORT 02 /* variable is to be exported */
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#define GETCELL 04 /* name & value space was got with getcell */
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static struct var *vlist; /* dictionary */
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static struct var *homedir; /* home directory */
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static struct var *prompt; /* main prompt */
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static struct var *cprompt; /* continuation prompt */
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static struct var *path; /* search path for commands */
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static struct var *shell; /* shell to interpret command files */
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static struct var *ifs; /* field separators */
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static int yyparse (void);
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static struct var *lookup (char *n );
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static void setval (struct var *vp, char *val );
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static void nameval (struct var *vp, char *val, char *name );
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static void export (struct var *vp );
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static void ronly (struct var *vp );
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static int isassign (char *s );
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static int checkname (char *cp );
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static int assign (char *s, int cf );
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static void putvlist (int f, int out );
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static int eqname (char *n1, char *n2 );
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static int execute (struct op *t, int *pin, int *pout, int act );
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/* -------- io.h -------- */
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/* io buffer */
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struct iobuf {
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unsigned id; /* buffer id */
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char buf[512]; /* buffer */
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char *bufp; /* pointer into buffer */
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char *ebufp; /* pointer to end of buffer */
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};
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/* possible arguments to an IO function */
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struct ioarg {
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char *aword;
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char **awordlist;
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int afile; /* file descriptor */
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unsigned afid; /* buffer id */
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long afpos; /* file position */
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struct iobuf *afbuf; /* buffer for this file */
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};
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//static struct ioarg ioargstack[NPUSH];
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#define AFID_NOBUF (~0)
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#define AFID_ID 0
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/* an input generator's state */
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struct io {
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int (*iofn)(struct ioarg *, struct io *);
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struct ioarg *argp;
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int peekc;
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char prev; /* previous character read by readc() */
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char nlcount; /* for `'s */
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char xchar; /* for `'s */
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char task; /* reason for pushed IO */
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};
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//static struct io iostack[NPUSH];
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#define XOTHER 0 /* none of the below */
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#define XDOLL 1 /* expanding ${} */
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#define XGRAVE 2 /* expanding `'s */
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#define XIO 3 /* file IO */
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/* in substitution */
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#define INSUB() (e.iop->task == XGRAVE || e.iop->task == XDOLL)
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/*
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* input generators for IO structure
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*/
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static int nlchar (struct ioarg *ap );
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static int strchar (struct ioarg *ap );
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static int qstrchar (struct ioarg *ap );
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static int filechar (struct ioarg *ap );
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static int herechar (struct ioarg *ap );
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static int linechar (struct ioarg *ap );
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static int gravechar (struct ioarg *ap, struct io *iop );
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static int qgravechar (struct ioarg *ap, struct io *iop );
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static int dolchar (struct ioarg *ap );
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static int wdchar (struct ioarg *ap );
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static void scraphere (void);
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static void freehere (int area );
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static void gethere (void);
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static void markhere (char *s, struct ioword *iop );
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static int herein (char *hname, int xdoll );
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static int run (struct ioarg *argp, int (*f)(struct ioarg *));
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/*
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* IO functions
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*/
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static int eofc (void);
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static int readc (void);
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static void unget (int c );
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static void ioecho (int c );
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static void prs (char *s );
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static void prn (unsigned u );
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static void closef (int i );
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static void closeall (void);
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/*
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* IO control
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*/
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static void pushio (struct ioarg *argp, int (*f)(struct ioarg *));
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static int remap (int fd );
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static int openpipe (int *pv );
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static void closepipe (int *pv );
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static struct io *setbase (struct io *ip );
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static struct ioarg temparg; /* temporary for PUSHIO */
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#define PUSHIO(what,arg,gen) ((temparg.what = (arg)),pushio(&temparg,(gen)))
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#define RUN(what,arg,gen) ((temparg.what = (arg)), run(&temparg,(gen)))
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/* -------- word.h -------- */
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#define NSTART 16 /* default number of words to allow for initially */
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struct wdblock {
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short w_bsize;
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short w_nword;
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/* bounds are arbitrary */
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char *w_words[1];
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};
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static struct wdblock *addword (char *wd, struct wdblock *wb );
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static struct wdblock *newword (int nw );
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static char **getwords (struct wdblock *wb );
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|
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/* -------- area.h -------- */
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|
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|
/*
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* storage allocation
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|
*/
|
|
static char *getcell (unsigned nbytes );
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|
static void garbage (void);
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|
static void setarea (char *cp, int a );
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|
static int getarea (char *cp );
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static void freearea (int a );
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static void freecell (char *cp );
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static int areanum; /* current allocation area */
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#define NEW(type) (type *)getcell(sizeof(type))
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#define DELETE(obj) freecell((char *)obj)
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/* -------- misc stuff -------- */
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|
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static int forkexec (struct op *t, int *pin, int *pout, int act, char **wp, int *pforked );
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static int iosetup (struct ioword *iop, int pipein, int pipeout );
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|
static void echo(char **wp );
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|
static struct op **find1case (struct op *t, char *w );
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|
static struct op *findcase (struct op *t, char *w );
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|
static void brkset(struct brkcon *bc );
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|
static int dolabel(struct op *t );
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|
static int dohelp(struct op *t );
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|
static int dochdir(struct op *t );
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|
static int doshift(struct op *t );
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|
static int dologin(struct op *t );
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|
static int doumask(struct op *t );
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|
static int doexec(struct op *t );
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static int dodot(struct op *t );
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static int dowait(struct op *t );
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static int doread(struct op *t );
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static int doeval(struct op *t );
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static int dotrap(struct op *t );
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|
static int getsig(char *s );
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static void setsig (int n, sighandler_t f);
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static int getn(char *as );
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static int dobreak(struct op *t );
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static int docontinue(struct op *t );
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static int brkcontin (char *cp, int val );
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|
static int doexit(struct op *t );
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|
static int doexport(struct op *t );
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static int doreadonly(struct op *t );
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|
static void rdexp (char **wp, void (*f)(struct var *), int key);
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|
static void badid(char *s );
|
|
static int doset(struct op *t );
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|
static void varput (char *s, int out );
|
|
static int dotimes(struct op *t );
|
|
static int expand (char *cp, struct wdblock **wbp, int f );
|
|
static char *blank(int f );
|
|
static int dollar(int quoted );
|
|
static int grave(int quoted );
|
|
static void globname (char *we, char *pp );
|
|
static char *generate (char *start1, char *end1, char *middle, char *end );
|
|
static int anyspcl(struct wdblock *wb );
|
|
static int xstrcmp (char *p1, char *p2 );
|
|
static void glob0 (char *a0, unsigned int a1, int a2, int (*a3)(char *, char *));
|
|
static void glob1 (char *base, char *lim );
|
|
static void glob2 (char *i, char *j );
|
|
static void glob3 (char *i, char *j, char *k );
|
|
static void readhere (char **name, char *s, int ec );
|
|
static void pushio (struct ioarg *argp, int (*f)(struct ioarg *));
|
|
static int xxchar(struct ioarg *ap );
|
|
|
|
struct here {
|
|
char *h_tag;
|
|
int h_dosub;
|
|
struct ioword *h_iop;
|
|
struct here *h_next;
|
|
};
|
|
|
|
static char *signame[] = {
|
|
"Signal 0",
|
|
"Hangup",
|
|
(char *)NULL, /* interrupt */
|
|
"Quit",
|
|
"Illegal instruction",
|
|
"Trace/BPT trap",
|
|
"Abort",
|
|
"Bus error",
|
|
"Floating Point Exception",
|
|
"Killed",
|
|
"SIGUSR1",
|
|
"SIGSEGV",
|
|
"SIGUSR2",
|
|
(char *)NULL, /* broken pipe */
|
|
"Alarm clock",
|
|
"Terminated",
|
|
};
|
|
#define NSIGNAL (sizeof(signame)/sizeof(signame[0]))
|
|
|
|
struct res {
|
|
char *r_name;
|
|
int r_val;
|
|
};
|
|
static struct res restab[] = {
|
|
{"for", FOR},
|
|
{"case", CASE},
|
|
{"esac", ESAC},
|
|
{"while", WHILE},
|
|
{"do", DO},
|
|
{"done", DONE},
|
|
{"if", IF},
|
|
{"in", IN},
|
|
{"then", THEN},
|
|
{"else", ELSE},
|
|
{"elif", ELIF},
|
|
{"until", UNTIL},
|
|
{"fi", FI},
|
|
|
|
{";;", BREAK},
|
|
{"||", LOGOR},
|
|
{"&&", LOGAND},
|
|
{"{", '{'},
|
|
{"}", '}'},
|
|
{0, 0},
|
|
};
|
|
|
|
|
|
struct builtincmd {
|
|
const char *name;
|
|
int (*builtinfunc)(struct op *t);
|
|
};
|
|
static const struct builtincmd builtincmds[] = {
|
|
{".", dodot},
|
|
{":", dolabel},
|
|
{"break", dobreak},
|
|
{"cd", dochdir},
|
|
{"continue",docontinue},
|
|
{"eval", doeval},
|
|
{"exec", doexec},
|
|
{"exit", doexit},
|
|
{"export", doexport},
|
|
{"help", dohelp},
|
|
{"login", dologin},
|
|
{"newgrp", dologin},
|
|
{"read", doread},
|
|
{"readonly",doreadonly},
|
|
{"set", doset},
|
|
{"shift", doshift},
|
|
{"times", dotimes},
|
|
{"trap", dotrap},
|
|
{"umask", doumask},
|
|
{"wait", dowait},
|
|
{0,0}
|
|
};
|
|
|
|
/* Globals */
|
|
extern char **environ; /* environment pointer */
|
|
static char **dolv;
|
|
static int dolc;
|
|
static int exstat;
|
|
static char gflg;
|
|
static int interactive; /* Is this an interactive shell */
|
|
static int execflg;
|
|
static int multiline; /* \n changed to ; */
|
|
static struct op *outtree; /* result from parser */
|
|
static xint *failpt;
|
|
static xint *errpt;
|
|
static struct brkcon *brklist;
|
|
static int isbreak;
|
|
static struct wdblock *wdlist;
|
|
static struct wdblock *iolist;
|
|
static char *trap[_NSIG+1];
|
|
static char ourtrap[_NSIG+1];
|
|
static int trapset; /* trap pending */
|
|
static int yynerrs; /* yacc */
|
|
static char line[LINELIM];
|
|
static struct var *vlist; /* dictionary */
|
|
static struct var *homedir; /* home directory */
|
|
static struct var *prompt; /* main prompt */
|
|
static struct var *cprompt; /* continuation prompt */
|
|
static struct var *path; /* search path for commands */
|
|
static struct var *shell; /* shell to interpret command files */
|
|
static struct var *ifs; /* field separators */
|
|
static struct ioarg ioargstack[NPUSH];
|
|
static struct io iostack[NPUSH];
|
|
static int areanum; /* current allocation area */
|
|
static int intr;
|
|
static int inparse;
|
|
static char flags['z'-'a'+1];
|
|
static char *flag = flags-'a';
|
|
static char *elinep = line+sizeof(line)-5;
|
|
static char *null = "";
|
|
static int heedint =1;
|
|
static struct env e ={line, iostack, iostack-1, (xint *)NULL, FDBASE, (struct env *)NULL};
|
|
static void (*qflag)(int) = SIG_IGN;
|
|
static int startl;
|
|
static int peeksym;
|
|
static int nlseen;
|
|
static int iounit = IODEFAULT;
|
|
static YYSTYPE yylval;
|
|
static struct iobuf sharedbuf = {AFID_NOBUF};
|
|
static struct iobuf mainbuf = {AFID_NOBUF};
|
|
static unsigned bufid = AFID_ID; /* buffer id counter */
|
|
static struct ioarg temparg = {0, 0, 0, AFID_NOBUF, 0};
|
|
static struct here *inhere; /* list of hear docs while parsing */
|
|
static struct here *acthere; /* list of active here documents */
|
|
static struct region *areabot; /* bottom of area */
|
|
static struct region *areatop; /* top of area */
|
|
static struct region *areanxt; /* starting point of scan */
|
|
static void * brktop;
|
|
static void * brkaddr;
|
|
|
|
|
|
#ifdef CONFIG_FEATURE_COMMAND_EDITING
|
|
static char * current_prompt;
|
|
#endif
|
|
|
|
/* -------- sh.c -------- */
|
|
/*
|
|
* shell
|
|
*/
|
|
|
|
|
|
extern int msh_main(int argc, char **argv)
|
|
{
|
|
register int f;
|
|
register char *s;
|
|
int cflag;
|
|
char *name, **ap;
|
|
int (*iof)(struct ioarg *);
|
|
|
|
initarea();
|
|
if ((ap = environ) != NULL) {
|
|
while (*ap)
|
|
assign(*ap++, !COPYV);
|
|
for (ap = environ; *ap;)
|
|
export(lookup(*ap++));
|
|
}
|
|
closeall();
|
|
areanum = 1;
|
|
|
|
shell = lookup("SHELL");
|
|
if (shell->value == null)
|
|
setval(shell, DEFAULT_SHELL);
|
|
export(shell);
|
|
|
|
homedir = lookup("HOME");
|
|
if (homedir->value == null)
|
|
setval(homedir, "/");
|
|
export(homedir);
|
|
|
|
setval(lookup("$"), putn(getpid()));
|
|
|
|
path = lookup("PATH");
|
|
if (path->value == null) {
|
|
if (geteuid() == 0)
|
|
setval(path, "/sbin:/bin:/usr/sbin:/usr/bin");
|
|
else
|
|
setval(path, "/bin:/usr/bin");
|
|
}
|
|
export(path);
|
|
|
|
ifs = lookup("IFS");
|
|
if (ifs->value == null)
|
|
setval(ifs, " \t\n");
|
|
|
|
prompt = lookup("PS1");
|
|
#ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
|
|
if (prompt->value == null)
|
|
#endif
|
|
setval(prompt, "$ ");
|
|
if (geteuid() == 0) {
|
|
setval(prompt, "# ");
|
|
prompt->status &= ~EXPORT;
|
|
}
|
|
cprompt = lookup("PS2");
|
|
#ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
|
|
if (cprompt->value == null)
|
|
#endif
|
|
setval(cprompt, "> ");
|
|
|
|
iof = filechar;
|
|
cflag = 0;
|
|
name = *argv++;
|
|
if (--argc >= 1) {
|
|
if(argv[0][0] == '-' && argv[0][1] != '\0') {
|
|
for (s = argv[0]+1; *s; s++)
|
|
switch (*s) {
|
|
case 'c':
|
|
prompt->status &= ~EXPORT;
|
|
cprompt->status &= ~EXPORT;
|
|
setval(prompt, "");
|
|
setval(cprompt, "");
|
|
cflag = 1;
|
|
if (--argc > 0)
|
|
PUSHIO(aword, *++argv, iof = nlchar);
|
|
break;
|
|
|
|
case 'q':
|
|
qflag = SIG_DFL;
|
|
break;
|
|
|
|
case 's':
|
|
/* standard input */
|
|
break;
|
|
|
|
case 't':
|
|
prompt->status &= ~EXPORT;
|
|
setval(prompt, "");
|
|
iof = linechar;
|
|
break;
|
|
|
|
case 'i':
|
|
interactive++;
|
|
default:
|
|
if (*s>='a' && *s<='z')
|
|
flag[(int)*s]++;
|
|
}
|
|
} else {
|
|
argv--;
|
|
argc++;
|
|
}
|
|
if (iof == filechar && --argc > 0) {
|
|
setval(prompt, "");
|
|
setval(cprompt, "");
|
|
prompt->status &= ~EXPORT;
|
|
cprompt->status &= ~EXPORT;
|
|
if (newfile(name = *++argv))
|
|
exit(1);
|
|
}
|
|
}
|
|
setdash();
|
|
if (e.iop < iostack) {
|
|
PUSHIO(afile, 0, iof);
|
|
if (isatty(0) && isatty(1) && !cflag) {
|
|
interactive++;
|
|
#ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
|
|
printf( "\n\n" BB_BANNER " Built-in shell (msh)\n");
|
|
printf( "Enter 'help' for a list of built-in commands.\n\n");
|
|
#endif
|
|
}
|
|
}
|
|
signal(SIGQUIT, qflag);
|
|
if (name && name[0] == '-') {
|
|
interactive++;
|
|
if ((f = open(".profile", 0)) >= 0)
|
|
next(remap(f));
|
|
if ((f = open("/etc/profile", 0)) >= 0)
|
|
next(remap(f));
|
|
}
|
|
if (interactive)
|
|
signal(SIGTERM, sig);
|
|
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
|
|
signal(SIGINT, onintr);
|
|
dolv = argv;
|
|
dolc = argc;
|
|
dolv[0] = name;
|
|
if (dolc > 1) {
|
|
for (ap = ++argv; --argc > 0;) {
|
|
if (assign(*ap = *argv++, !COPYV)) {
|
|
dolc--; /* keyword */
|
|
} else {
|
|
ap++;
|
|
}
|
|
}
|
|
}
|
|
setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc));
|
|
|
|
for (;;) {
|
|
if (interactive && e.iop <= iostack) {
|
|
#ifdef CONFIG_FEATURE_COMMAND_EDITING
|
|
current_prompt=prompt->value;
|
|
#else
|
|
prs(prompt->value);
|
|
#endif
|
|
}
|
|
onecommand();
|
|
/* Ensure that getenv("PATH") stays current */
|
|
setenv("PATH", path->value, 1);
|
|
}
|
|
}
|
|
|
|
static void
|
|
setdash()
|
|
{
|
|
register char *cp;
|
|
register int c;
|
|
char m['z'-'a'+1];
|
|
|
|
cp = m;
|
|
for (c='a'; c<='z'; c++)
|
|
if (flag[(int)c])
|
|
*cp++ = c;
|
|
*cp = 0;
|
|
setval(lookup("-"), m);
|
|
}
|
|
|
|
static int
|
|
newfile(s)
|
|
register char *s;
|
|
{
|
|
register int f;
|
|
|
|
if (strcmp(s, "-") != 0) {
|
|
f = open(s, 0);
|
|
if (f < 0) {
|
|
prs(s);
|
|
err(": cannot open");
|
|
return(1);
|
|
}
|
|
} else
|
|
f = 0;
|
|
next(remap(f));
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
onecommand()
|
|
{
|
|
register int i;
|
|
jmp_buf m1;
|
|
|
|
while (e.oenv)
|
|
quitenv();
|
|
areanum = 1;
|
|
freehere(areanum);
|
|
freearea(areanum);
|
|
garbage();
|
|
wdlist = 0;
|
|
iolist = 0;
|
|
e.errpt = 0;
|
|
e.linep = line;
|
|
yynerrs = 0;
|
|
multiline = 0;
|
|
inparse = 1;
|
|
intr = 0;
|
|
execflg = 0;
|
|
setjmp(failpt = m1); /* Bruce Evans' fix */
|
|
if (setjmp(failpt = m1) || yyparse() || intr) {
|
|
while (e.oenv)
|
|
quitenv();
|
|
scraphere();
|
|
if (!interactive && intr)
|
|
leave();
|
|
inparse = 0;
|
|
intr = 0;
|
|
return;
|
|
}
|
|
inparse = 0;
|
|
brklist = 0;
|
|
intr = 0;
|
|
execflg = 0;
|
|
if (!flag['n'])
|
|
execute(outtree, NOPIPE, NOPIPE, 0);
|
|
if (!interactive && intr) {
|
|
execflg = 0;
|
|
leave();
|
|
}
|
|
if ((i = trapset) != 0) {
|
|
trapset = 0;
|
|
runtrap(i);
|
|
}
|
|
}
|
|
|
|
static void
|
|
fail()
|
|
{
|
|
longjmp(failpt, 1);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static void
|
|
leave()
|
|
{
|
|
if (execflg)
|
|
fail();
|
|
scraphere();
|
|
freehere(1);
|
|
runtrap(0);
|
|
exit(exstat);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static void
|
|
warn(s)
|
|
register char *s;
|
|
{
|
|
if(*s) {
|
|
prs(s);
|
|
exstat = -1;
|
|
}
|
|
prs("\n");
|
|
if (flag['e'])
|
|
leave();
|
|
}
|
|
|
|
static void
|
|
err(s)
|
|
char *s;
|
|
{
|
|
warn(s);
|
|
if (flag['n'])
|
|
return;
|
|
if (!interactive)
|
|
leave();
|
|
if (e.errpt)
|
|
longjmp(e.errpt, 1);
|
|
closeall();
|
|
e.iop = e.iobase = iostack;
|
|
}
|
|
|
|
static int
|
|
newenv(f)
|
|
int f;
|
|
{
|
|
register struct env *ep;
|
|
|
|
if (f) {
|
|
quitenv();
|
|
return(1);
|
|
}
|
|
ep = (struct env *) space(sizeof(*ep));
|
|
if (ep == NULL) {
|
|
while (e.oenv)
|
|
quitenv();
|
|
fail();
|
|
}
|
|
*ep = e;
|
|
e.oenv = ep;
|
|
e.errpt = errpt;
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
quitenv()
|
|
{
|
|
register struct env *ep;
|
|
register int fd;
|
|
|
|
if ((ep = e.oenv) != NULL) {
|
|
fd = e.iofd;
|
|
e = *ep;
|
|
/* should close `'d files */
|
|
DELETE(ep);
|
|
while (--fd >= e.iofd)
|
|
close(fd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Is any character from s1 in s2?
|
|
*/
|
|
static int
|
|
anys(s1, s2)
|
|
register char *s1, *s2;
|
|
{
|
|
while (*s1)
|
|
if (any(*s1++, s2))
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Is character c in s?
|
|
*/
|
|
static int
|
|
any(c, s)
|
|
register int c;
|
|
register char *s;
|
|
{
|
|
while (*s)
|
|
if (*s++ == c)
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
static char *
|
|
putn(n)
|
|
register int n;
|
|
{
|
|
return(itoa(n));
|
|
}
|
|
|
|
static char *
|
|
itoa(n)
|
|
register int n;
|
|
{
|
|
static char s[20];
|
|
snprintf(s, sizeof(s), "%u", n);
|
|
return(s);
|
|
}
|
|
|
|
static void
|
|
next(int f)
|
|
{
|
|
PUSHIO(afile, f, filechar);
|
|
}
|
|
|
|
static void
|
|
onintr(s)
|
|
int s; /* ANSI C requires a parameter */
|
|
{
|
|
signal(SIGINT, onintr);
|
|
intr = 1;
|
|
if (interactive) {
|
|
if (inparse) {
|
|
prs("\n");
|
|
fail();
|
|
}
|
|
}
|
|
else if (heedint) {
|
|
execflg = 0;
|
|
leave();
|
|
}
|
|
}
|
|
|
|
static char *
|
|
space(n)
|
|
int n;
|
|
{
|
|
register char *cp;
|
|
|
|
if ((cp = getcell(n)) == 0)
|
|
err("out of string space");
|
|
return(cp);
|
|
}
|
|
|
|
static char *
|
|
strsave(s, a)
|
|
register char *s;
|
|
int a;
|
|
{
|
|
register char *cp, *xp;
|
|
|
|
if ((cp = space(strlen(s)+1)) != NULL) {
|
|
setarea((char *)cp, a);
|
|
for (xp = cp; (*xp++ = *s++) != '\0';)
|
|
;
|
|
return(cp);
|
|
}
|
|
return("");
|
|
}
|
|
|
|
/*
|
|
* trap handling
|
|
*/
|
|
static void
|
|
sig(i)
|
|
register int i;
|
|
{
|
|
trapset = i;
|
|
signal(i, sig);
|
|
}
|
|
|
|
static void runtrap(i)
|
|
int i;
|
|
{
|
|
char *trapstr;
|
|
|
|
if ((trapstr = trap[i]) == NULL)
|
|
return;
|
|
if (i == 0)
|
|
trap[i] = 0;
|
|
RUN(aword, trapstr, nlchar);
|
|
}
|
|
|
|
/* -------- var.c -------- */
|
|
|
|
/*
|
|
* Find the given name in the dictionary
|
|
* and return its value. If the name was
|
|
* not previously there, enter it now and
|
|
* return a null value.
|
|
*/
|
|
static struct var *
|
|
lookup(n)
|
|
register char *n;
|
|
{
|
|
register struct var *vp;
|
|
register char *cp;
|
|
register int c;
|
|
static struct var dummy;
|
|
|
|
if (isdigit(*n)) {
|
|
dummy.name = n;
|
|
for (c = 0; isdigit(*n) && c < 1000; n++)
|
|
c = c*10 + *n-'0';
|
|
dummy.status = RONLY;
|
|
dummy.value = c <= dolc? dolv[c]: null;
|
|
return(&dummy);
|
|
}
|
|
for (vp = vlist; vp; vp = vp->next)
|
|
if (eqname(vp->name, n))
|
|
return(vp);
|
|
cp = findeq(n);
|
|
vp = (struct var *)space(sizeof(*vp));
|
|
if (vp == 0 || (vp->name = space((int)(cp-n)+2)) == 0) {
|
|
dummy.name = dummy.value = "";
|
|
return(&dummy);
|
|
}
|
|
for (cp = vp->name; (*cp = *n++) && *cp != '='; cp++)
|
|
;
|
|
if (*cp == 0)
|
|
*cp = '=';
|
|
*++cp = 0;
|
|
setarea((char *)vp, 0);
|
|
setarea((char *)vp->name, 0);
|
|
vp->value = null;
|
|
vp->next = vlist;
|
|
vp->status = GETCELL;
|
|
vlist = vp;
|
|
return(vp);
|
|
}
|
|
|
|
/*
|
|
* give variable at `vp' the value `val'.
|
|
*/
|
|
static void
|
|
setval(vp, val)
|
|
struct var *vp;
|
|
char *val;
|
|
{
|
|
nameval(vp, val, (char *)NULL);
|
|
}
|
|
|
|
/*
|
|
* if name is not NULL, it must be
|
|
* a prefix of the space `val',
|
|
* and end with `='.
|
|
* this is all so that exporting
|
|
* values is reasonably painless.
|
|
*/
|
|
static void
|
|
nameval(vp, val, name)
|
|
register struct var *vp;
|
|
char *val, *name;
|
|
{
|
|
register char *cp, *xp;
|
|
char *nv;
|
|
int fl;
|
|
|
|
if (vp->status & RONLY) {
|
|
for (xp = vp->name; *xp && *xp != '=';)
|
|
putc(*xp++, stderr);
|
|
err(" is read-only");
|
|
return;
|
|
}
|
|
fl = 0;
|
|
if (name == NULL) {
|
|
xp = space(strlen(vp->name)+strlen(val)+2);
|
|
if (xp == 0)
|
|
return;
|
|
/* make string: name=value */
|
|
setarea((char *)xp, 0);
|
|
name = xp;
|
|
for (cp = vp->name; (*xp = *cp++) && *xp!='='; xp++)
|
|
;
|
|
if (*xp++ == 0)
|
|
xp[-1] = '=';
|
|
nv = xp;
|
|
for (cp = val; (*xp++ = *cp++) != '\0';)
|
|
;
|
|
val = nv;
|
|
fl = GETCELL;
|
|
}
|
|
if (vp->status & GETCELL)
|
|
freecell(vp->name); /* form new string `name=value' */
|
|
vp->name = name;
|
|
vp->value = val;
|
|
vp->status |= fl;
|
|
}
|
|
|
|
static void
|
|
export(vp)
|
|
struct var *vp;
|
|
{
|
|
vp->status |= EXPORT;
|
|
}
|
|
|
|
static void
|
|
ronly(vp)
|
|
struct var *vp;
|
|
{
|
|
if (isalpha(vp->name[0]) || vp->name[0] == '_') /* not an internal symbol */
|
|
vp->status |= RONLY;
|
|
}
|
|
|
|
static int
|
|
isassign(s)
|
|
register char *s;
|
|
{
|
|
if (!isalpha((int)*s) && *s != '_')
|
|
return(0);
|
|
for (; *s != '='; s++)
|
|
if (*s == 0 || (!isalnum(*s) && *s != '_'))
|
|
return(0);
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
assign(s, cf)
|
|
register char *s;
|
|
int cf;
|
|
{
|
|
register char *cp;
|
|
struct var *vp;
|
|
|
|
if (!isalpha(*s) && *s != '_')
|
|
return(0);
|
|
for (cp = s; *cp != '='; cp++)
|
|
if (*cp == 0 || (!isalnum(*cp) && *cp != '_'))
|
|
return(0);
|
|
vp = lookup(s);
|
|
nameval(vp, ++cp, cf == COPYV? (char *)NULL: s);
|
|
if (cf != COPYV)
|
|
vp->status &= ~GETCELL;
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
checkname(cp)
|
|
register char *cp;
|
|
{
|
|
if (!isalpha(*cp++) && *(cp-1) != '_')
|
|
return(0);
|
|
while (*cp)
|
|
if (!isalnum(*cp++) && *(cp-1) != '_')
|
|
return(0);
|
|
return(1);
|
|
}
|
|
|
|
static void
|
|
putvlist(f, out)
|
|
register int f, out;
|
|
{
|
|
register struct var *vp;
|
|
|
|
for (vp = vlist; vp; vp = vp->next)
|
|
if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) {
|
|
if (vp->status & EXPORT)
|
|
write(out, "export ", 7);
|
|
if (vp->status & RONLY)
|
|
write(out, "readonly ", 9);
|
|
write(out, vp->name, (int)(findeq(vp->name) - vp->name));
|
|
write(out, "\n", 1);
|
|
}
|
|
}
|
|
|
|
static int
|
|
eqname(n1, n2)
|
|
register char *n1, *n2;
|
|
{
|
|
for (; *n1 != '=' && *n1 != 0; n1++)
|
|
if (*n2++ != *n1)
|
|
return(0);
|
|
return(*n2 == 0 || *n2 == '=');
|
|
}
|
|
|
|
static char *
|
|
findeq(cp)
|
|
register char *cp;
|
|
{
|
|
while (*cp != '\0' && *cp != '=')
|
|
cp++;
|
|
return(cp);
|
|
}
|
|
|
|
/* -------- gmatch.c -------- */
|
|
/*
|
|
* int gmatch(string, pattern)
|
|
* char *string, *pattern;
|
|
*
|
|
* Match a pattern as in sh(1).
|
|
*/
|
|
|
|
#define CMASK 0377
|
|
#define QUOTE 0200
|
|
#define QMASK (CMASK&~QUOTE)
|
|
#define NOT '!' /* might use ^ */
|
|
|
|
static int
|
|
gmatch(s, p)
|
|
register char *s, *p;
|
|
{
|
|
register int sc, pc;
|
|
|
|
if (s == NULL || p == NULL)
|
|
return(0);
|
|
while ((pc = *p++ & CMASK) != '\0') {
|
|
sc = *s++ & QMASK;
|
|
switch (pc) {
|
|
case '[':
|
|
if ((p = cclass(p, sc)) == NULL)
|
|
return(0);
|
|
break;
|
|
|
|
case '?':
|
|
if (sc == 0)
|
|
return(0);
|
|
break;
|
|
|
|
case '*':
|
|
s--;
|
|
do {
|
|
if (*p == '\0' || gmatch(s, p))
|
|
return(1);
|
|
} while (*s++ != '\0');
|
|
return(0);
|
|
|
|
default:
|
|
if (sc != (pc&~QUOTE))
|
|
return(0);
|
|
}
|
|
}
|
|
return(*s == 0);
|
|
}
|
|
|
|
static char *
|
|
cclass(p, sub)
|
|
register char *p;
|
|
register int sub;
|
|
{
|
|
register int c, d, not, found;
|
|
|
|
if ((not = *p == NOT) != 0)
|
|
p++;
|
|
found = not;
|
|
do {
|
|
if (*p == '\0')
|
|
return((char *)NULL);
|
|
c = *p & CMASK;
|
|
if (p[1] == '-' && p[2] != ']') {
|
|
d = p[2] & CMASK;
|
|
p++;
|
|
} else
|
|
d = c;
|
|
if (c == sub || (c <= sub && sub <= d))
|
|
found = !not;
|
|
} while (*++p != ']');
|
|
return(found? p+1: (char *)NULL);
|
|
}
|
|
|
|
|
|
/* -------- area.c -------- */
|
|
|
|
/*
|
|
* All memory between (char *)areabot and (char *)(areatop+1) is
|
|
* exclusively administered by the area management routines.
|
|
* It is assumed that sbrk() and brk() manipulate the high end.
|
|
*/
|
|
|
|
#define sbrk(X) ({ void * __q = (void *)-1; if (brkaddr + (int)(X) < brktop) { __q = brkaddr; brkaddr+=(int)(X); } __q;})
|
|
|
|
static void
|
|
initarea()
|
|
{
|
|
brkaddr = malloc(65000);
|
|
brktop = brkaddr + 65000;
|
|
|
|
while ((int)sbrk(0) & ALIGN)
|
|
sbrk(1);
|
|
areabot = (struct region *)sbrk(REGSIZE);
|
|
|
|
areabot->next = areabot;
|
|
areabot->area = BUSY;
|
|
areatop = areabot;
|
|
areanxt = areabot;
|
|
}
|
|
|
|
char *
|
|
getcell(nbytes)
|
|
unsigned nbytes;
|
|
{
|
|
register int nregio;
|
|
register struct region *p, *q;
|
|
register int i;
|
|
|
|
if (nbytes == 0) {
|
|
puts("getcell(0)");
|
|
abort();
|
|
} /* silly and defeats the algorithm */
|
|
/*
|
|
* round upwards and add administration area
|
|
*/
|
|
nregio = (nbytes+(REGSIZE-1))/REGSIZE + 1;
|
|
for (p = areanxt;;) {
|
|
if (p->area > areanum) {
|
|
/*
|
|
* merge free cells
|
|
*/
|
|
while ((q = p->next)->area > areanum && q != areanxt)
|
|
p->next = q->next;
|
|
/*
|
|
* exit loop if cell big enough
|
|
*/
|
|
if (q >= p + nregio)
|
|
goto found;
|
|
}
|
|
p = p->next;
|
|
if (p == areanxt)
|
|
break;
|
|
}
|
|
i = nregio >= GROWBY ? nregio : GROWBY;
|
|
p = (struct region *)sbrk(i * REGSIZE);
|
|
if (p == (struct region *)-1)
|
|
return((char *)NULL);
|
|
p--;
|
|
if (p != areatop) {
|
|
puts("not contig");
|
|
abort(); /* allocated areas are contiguous */
|
|
}
|
|
q = p + i;
|
|
p->next = q;
|
|
p->area = FREE;
|
|
q->next = areabot;
|
|
q->area = BUSY;
|
|
areatop = q;
|
|
found:
|
|
/*
|
|
* we found a FREE area big enough, pointed to by 'p', and up to 'q'
|
|
*/
|
|
areanxt = p + nregio;
|
|
if (areanxt < q) {
|
|
/*
|
|
* split into requested area and rest
|
|
*/
|
|
if (areanxt+1 > q) {
|
|
puts("OOM");
|
|
abort(); /* insufficient space left for admin */
|
|
}
|
|
areanxt->next = q;
|
|
areanxt->area = FREE;
|
|
p->next = areanxt;
|
|
}
|
|
p->area = areanum;
|
|
return((char *)(p+1));
|
|
}
|
|
|
|
static void
|
|
freecell(cp)
|
|
char *cp;
|
|
{
|
|
register struct region *p;
|
|
|
|
if ((p = (struct region *)cp) != NULL) {
|
|
p--;
|
|
if (p < areanxt)
|
|
areanxt = p;
|
|
p->area = FREE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
freearea(a)
|
|
register int a;
|
|
{
|
|
register struct region *p, *top;
|
|
|
|
top = areatop;
|
|
for (p = areabot; p != top; p = p->next)
|
|
if (p->area >= a)
|
|
p->area = FREE;
|
|
}
|
|
|
|
static void
|
|
setarea(cp,a)
|
|
char *cp;
|
|
int a;
|
|
{
|
|
register struct region *p;
|
|
|
|
if ((p = (struct region *)cp) != NULL)
|
|
(p-1)->area = a;
|
|
}
|
|
|
|
int
|
|
getarea(cp)
|
|
char *cp;
|
|
{
|
|
return ((struct region*)cp-1)->area;
|
|
}
|
|
|
|
static void
|
|
garbage()
|
|
{
|
|
register struct region *p, *q, *top;
|
|
|
|
top = areatop;
|
|
for (p = areabot; p != top; p = p->next) {
|
|
if (p->area > areanum) {
|
|
while ((q = p->next)->area > areanum)
|
|
p->next = q->next;
|
|
areanxt = p;
|
|
}
|
|
}
|
|
#ifdef SHRINKBY
|
|
if (areatop >= q + SHRINKBY && q->area > areanum) {
|
|
brk((char *)(q+1));
|
|
q->next = areabot;
|
|
q->area = BUSY;
|
|
areatop = q;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* -------- csyn.c -------- */
|
|
/*
|
|
* shell: syntax (C version)
|
|
*/
|
|
|
|
|
|
int
|
|
yyparse()
|
|
{
|
|
startl = 1;
|
|
peeksym = 0;
|
|
yynerrs = 0;
|
|
outtree = c_list();
|
|
musthave('\n', 0);
|
|
return(yynerrs!=0);
|
|
}
|
|
|
|
static struct op *
|
|
pipeline(cf)
|
|
int cf;
|
|
{
|
|
register struct op *t, *p;
|
|
register int c;
|
|
|
|
t = command(cf);
|
|
if (t != NULL) {
|
|
while ((c = yylex(0)) == '|') {
|
|
if ((p = command(CONTIN)) == NULL)
|
|
SYNTAXERR;
|
|
if (t->type != TPAREN && t->type != TCOM) {
|
|
/* shell statement */
|
|
t = block(TPAREN, t, NOBLOCK, NOWORDS);
|
|
}
|
|
t = block(TPIPE, t, p, NOWORDS);
|
|
}
|
|
peeksym = c;
|
|
}
|
|
return(t);
|
|
}
|
|
|
|
static struct op *
|
|
andor()
|
|
{
|
|
register struct op *t, *p;
|
|
register int c;
|
|
|
|
t = pipeline(0);
|
|
if (t != NULL) {
|
|
while ((c = yylex(0)) == LOGAND || c == LOGOR) {
|
|
if ((p = pipeline(CONTIN)) == NULL)
|
|
SYNTAXERR;
|
|
t = block(c == LOGAND? TAND: TOR, t, p, NOWORDS);
|
|
}
|
|
peeksym = c;
|
|
}
|
|
return(t);
|
|
}
|
|
|
|
static struct op *
|
|
c_list()
|
|
{
|
|
register struct op *t, *p;
|
|
register int c;
|
|
|
|
t = andor();
|
|
if (t != NULL) {
|
|
if((peeksym = yylex(0)) == '&')
|
|
t = block(TASYNC, t, NOBLOCK, NOWORDS);
|
|
while ((c = yylex(0)) == ';' || c == '&' || (multiline && c == '\n')) {
|
|
if ((p = andor()) == NULL)
|
|
return(t);
|
|
if((peeksym = yylex(0)) == '&')
|
|
p = block(TASYNC, p, NOBLOCK, NOWORDS);
|
|
t = list(t, p);
|
|
}
|
|
peeksym = c;
|
|
}
|
|
return(t);
|
|
}
|
|
|
|
|
|
static int
|
|
synio(cf)
|
|
int cf;
|
|
{
|
|
register struct ioword *iop;
|
|
register int i;
|
|
register int c;
|
|
|
|
if ((c = yylex(cf)) != '<' && c != '>') {
|
|
peeksym = c;
|
|
return(0);
|
|
}
|
|
i = yylval.i;
|
|
musthave(WORD, 0);
|
|
iop = io(iounit, i, yylval.cp);
|
|
iounit = IODEFAULT;
|
|
if (i & IOHERE)
|
|
markhere(yylval.cp, iop);
|
|
return(1);
|
|
}
|
|
|
|
static void
|
|
musthave(c, cf)
|
|
int c, cf;
|
|
{
|
|
if ((peeksym = yylex(cf)) != c)
|
|
SYNTAXERR;
|
|
peeksym = 0;
|
|
}
|
|
|
|
static struct op *
|
|
simple()
|
|
{
|
|
register struct op *t;
|
|
|
|
t = NULL;
|
|
for (;;) {
|
|
switch (peeksym = yylex(0)) {
|
|
case '<':
|
|
case '>':
|
|
(void) synio(0);
|
|
break;
|
|
|
|
case WORD:
|
|
if (t == NULL) {
|
|
t = newtp();
|
|
t->type = TCOM;
|
|
}
|
|
peeksym = 0;
|
|
word(yylval.cp);
|
|
break;
|
|
|
|
default:
|
|
return(t);
|
|
}
|
|
}
|
|
}
|
|
|
|
static struct op *
|
|
nested(type, mark)
|
|
int type, mark;
|
|
{
|
|
register struct op *t;
|
|
|
|
multiline++;
|
|
t = c_list();
|
|
musthave(mark, 0);
|
|
multiline--;
|
|
return(block(type, t, NOBLOCK, NOWORDS));
|
|
}
|
|
|
|
static struct op *
|
|
command(cf)
|
|
int cf;
|
|
{
|
|
register struct op *t;
|
|
struct wdblock *iosave;
|
|
register int c;
|
|
|
|
iosave = iolist;
|
|
iolist = NULL;
|
|
if (multiline)
|
|
cf |= CONTIN;
|
|
while (synio(cf))
|
|
cf = 0;
|
|
switch (c = yylex(cf)) {
|
|
default:
|
|
peeksym = c;
|
|
if ((t = simple()) == NULL) {
|
|
if (iolist == NULL)
|
|
return((struct op *)NULL);
|
|
t = newtp();
|
|
t->type = TCOM;
|
|
}
|
|
break;
|
|
|
|
case '(':
|
|
t = nested(TPAREN, ')');
|
|
break;
|
|
|
|
case '{':
|
|
t = nested(TBRACE, '}');
|
|
break;
|
|
|
|
case FOR:
|
|
t = newtp();
|
|
t->type = TFOR;
|
|
musthave(WORD, 0);
|
|
startl = 1;
|
|
t->str = yylval.cp;
|
|
multiline++;
|
|
t->words = wordlist();
|
|
if ((c = yylex(0)) != '\n' && c != ';')
|
|
peeksym = c;
|
|
t->left = dogroup(0);
|
|
multiline--;
|
|
break;
|
|
|
|
case WHILE:
|
|
case UNTIL:
|
|
multiline++;
|
|
t = newtp();
|
|
t->type = c == WHILE? TWHILE: TUNTIL;
|
|
t->left = c_list();
|
|
t->right = dogroup(1);
|
|
t->words = NULL;
|
|
multiline--;
|
|
break;
|
|
|
|
case CASE:
|
|
t = newtp();
|
|
t->type = TCASE;
|
|
musthave(WORD, 0);
|
|
t->str = yylval.cp;
|
|
startl++;
|
|
multiline++;
|
|
musthave(IN, CONTIN);
|
|
startl++;
|
|
t->left = caselist();
|
|
musthave(ESAC, 0);
|
|
multiline--;
|
|
break;
|
|
|
|
case IF:
|
|
multiline++;
|
|
t = newtp();
|
|
t->type = TIF;
|
|
t->left = c_list();
|
|
t->right = thenpart();
|
|
musthave(FI, 0);
|
|
multiline--;
|
|
break;
|
|
}
|
|
while (synio(0))
|
|
;
|
|
t = namelist(t);
|
|
iolist = iosave;
|
|
return(t);
|
|
}
|
|
|
|
static struct op *
|
|
dogroup(onlydone)
|
|
int onlydone;
|
|
{
|
|
register int c;
|
|
register struct op *mylist;
|
|
|
|
c = yylex(CONTIN);
|
|
if (c == DONE && onlydone)
|
|
return((struct op *)NULL);
|
|
if (c != DO)
|
|
SYNTAXERR;
|
|
mylist = c_list();
|
|
musthave(DONE, 0);
|
|
return(mylist);
|
|
}
|
|
|
|
static struct op *
|
|
thenpart()
|
|
{
|
|
register int c;
|
|
register struct op *t;
|
|
|
|
if ((c = yylex(0)) != THEN) {
|
|
peeksym = c;
|
|
return((struct op *)NULL);
|
|
}
|
|
t = newtp();
|
|
t->type = 0;
|
|
t->left = c_list();
|
|
if (t->left == NULL)
|
|
SYNTAXERR;
|
|
t->right = elsepart();
|
|
return(t);
|
|
}
|
|
|
|
static struct op *
|
|
elsepart()
|
|
{
|
|
register int c;
|
|
register struct op *t;
|
|
|
|
switch (c = yylex(0)) {
|
|
case ELSE:
|
|
if ((t = c_list()) == NULL)
|
|
SYNTAXERR;
|
|
return(t);
|
|
|
|
case ELIF:
|
|
t = newtp();
|
|
t->type = TELIF;
|
|
t->left = c_list();
|
|
t->right = thenpart();
|
|
return(t);
|
|
|
|
default:
|
|
peeksym = c;
|
|
return((struct op *)NULL);
|
|
}
|
|
}
|
|
|
|
static struct op *
|
|
caselist()
|
|
{
|
|
register struct op *t;
|
|
|
|
t = NULL;
|
|
while ((peeksym = yylex(CONTIN)) != ESAC)
|
|
t = list(t, casepart());
|
|
return(t);
|
|
}
|
|
|
|
static struct op *
|
|
casepart()
|
|
{
|
|
register struct op *t;
|
|
|
|
t = newtp();
|
|
t->type = TPAT;
|
|
t->words = pattern();
|
|
musthave(')', 0);
|
|
t->left = c_list();
|
|
if ((peeksym = yylex(CONTIN)) != ESAC)
|
|
musthave(BREAK, CONTIN);
|
|
return(t);
|
|
}
|
|
|
|
static char **
|
|
pattern()
|
|
{
|
|
register int c, cf;
|
|
|
|
cf = CONTIN;
|
|
do {
|
|
musthave(WORD, cf);
|
|
word(yylval.cp);
|
|
cf = 0;
|
|
} while ((c = yylex(0)) == '|');
|
|
peeksym = c;
|
|
word(NOWORD);
|
|
return(copyw());
|
|
}
|
|
|
|
static char **
|
|
wordlist()
|
|
{
|
|
register int c;
|
|
|
|
if ((c = yylex(0)) != IN) {
|
|
peeksym = c;
|
|
return((char **)NULL);
|
|
}
|
|
startl = 0;
|
|
while ((c = yylex(0)) == WORD)
|
|
word(yylval.cp);
|
|
word(NOWORD);
|
|
peeksym = c;
|
|
return(copyw());
|
|
}
|
|
|
|
/*
|
|
* supporting functions
|
|
*/
|
|
static struct op *
|
|
list(t1, t2)
|
|
register struct op *t1, *t2;
|
|
{
|
|
if (t1 == NULL)
|
|
return(t2);
|
|
if (t2 == NULL)
|
|
return(t1);
|
|
return(block(TLIST, t1, t2, NOWORDS));
|
|
}
|
|
|
|
static struct op *
|
|
block(type, t1, t2, wp)
|
|
int type;
|
|
struct op *t1, *t2;
|
|
char **wp;
|
|
{
|
|
register struct op *t;
|
|
|
|
t = newtp();
|
|
t->type = type;
|
|
t->left = t1;
|
|
t->right = t2;
|
|
t->words = wp;
|
|
return(t);
|
|
}
|
|
|
|
static int
|
|
rlookup(n)
|
|
register char *n;
|
|
{
|
|
register struct res *rp;
|
|
|
|
for (rp = restab; rp->r_name; rp++)
|
|
if (strcmp(rp->r_name, n) == 0)
|
|
return(rp->r_val);
|
|
return(0);
|
|
}
|
|
|
|
static struct op *
|
|
newtp()
|
|
{
|
|
register struct op *t;
|
|
|
|
t = (struct op *)tree(sizeof(*t));
|
|
t->type = 0;
|
|
t->words = NULL;
|
|
t->ioact = NULL;
|
|
t->left = NULL;
|
|
t->right = NULL;
|
|
t->str = NULL;
|
|
return(t);
|
|
}
|
|
|
|
static struct op *
|
|
namelist(t)
|
|
register struct op *t;
|
|
{
|
|
if (iolist) {
|
|
iolist = addword((char *)NULL, iolist);
|
|
t->ioact = copyio();
|
|
} else
|
|
t->ioact = NULL;
|
|
if (t->type != TCOM) {
|
|
if (t->type != TPAREN && t->ioact != NULL) {
|
|
t = block(TPAREN, t, NOBLOCK, NOWORDS);
|
|
t->ioact = t->left->ioact;
|
|
t->left->ioact = NULL;
|
|
}
|
|
return(t);
|
|
}
|
|
word(NOWORD);
|
|
t->words = copyw();
|
|
return(t);
|
|
}
|
|
|
|
static char **
|
|
copyw()
|
|
{
|
|
register char **wd;
|
|
|
|
wd = getwords(wdlist);
|
|
wdlist = 0;
|
|
return(wd);
|
|
}
|
|
|
|
static void
|
|
word(cp)
|
|
char *cp;
|
|
{
|
|
wdlist = addword(cp, wdlist);
|
|
}
|
|
|
|
static struct ioword **
|
|
copyio()
|
|
{
|
|
register struct ioword **iop;
|
|
|
|
iop = (struct ioword **) getwords(iolist);
|
|
iolist = 0;
|
|
return(iop);
|
|
}
|
|
|
|
static struct ioword *
|
|
io(u, f, cp)
|
|
int u;
|
|
int f;
|
|
char *cp;
|
|
{
|
|
register struct ioword *iop;
|
|
|
|
iop = (struct ioword *) tree(sizeof(*iop));
|
|
iop->io_unit = u;
|
|
iop->io_flag = f;
|
|
iop->io_name = cp;
|
|
iolist = addword((char *)iop, iolist);
|
|
return(iop);
|
|
}
|
|
|
|
static void
|
|
zzerr()
|
|
{
|
|
yyerror("syntax error");
|
|
}
|
|
|
|
static void
|
|
yyerror(s)
|
|
char *s;
|
|
{
|
|
yynerrs++;
|
|
if (interactive && e.iop <= iostack) {
|
|
multiline = 0;
|
|
while (eofc() == 0 && yylex(0) != '\n')
|
|
;
|
|
}
|
|
err(s);
|
|
fail();
|
|
}
|
|
|
|
static int
|
|
yylex(cf)
|
|
int cf;
|
|
{
|
|
register int c, c1;
|
|
int atstart;
|
|
|
|
if ((c = peeksym) > 0) {
|
|
peeksym = 0;
|
|
if (c == '\n')
|
|
startl = 1;
|
|
return(c);
|
|
}
|
|
nlseen = 0;
|
|
e.linep = line;
|
|
atstart = startl;
|
|
startl = 0;
|
|
yylval.i = 0;
|
|
|
|
loop:
|
|
while ((c = my_getc(0)) == ' ' || c == '\t')
|
|
;
|
|
switch (c) {
|
|
default:
|
|
if (any(c, "0123456789")) {
|
|
unget(c1 = my_getc(0));
|
|
if (c1 == '<' || c1 == '>') {
|
|
iounit = c - '0';
|
|
goto loop;
|
|
}
|
|
*e.linep++ = c;
|
|
c = c1;
|
|
}
|
|
break;
|
|
|
|
case '#':
|
|
while ((c = my_getc(0)) != 0 && c != '\n')
|
|
;
|
|
unget(c);
|
|
goto loop;
|
|
|
|
case 0:
|
|
return(c);
|
|
|
|
case '$':
|
|
*e.linep++ = c;
|
|
if ((c = my_getc(0)) == '{') {
|
|
if ((c = collect(c, '}')) != '\0')
|
|
return(c);
|
|
goto pack;
|
|
}
|
|
break;
|
|
|
|
case '`':
|
|
case '\'':
|
|
case '"':
|
|
if ((c = collect(c, c)) != '\0')
|
|
return(c);
|
|
goto pack;
|
|
|
|
case '|':
|
|
case '&':
|
|
case ';':
|
|
if ((c1 = dual(c)) != '\0') {
|
|
startl = 1;
|
|
return(c1);
|
|
}
|
|
startl = 1;
|
|
return(c);
|
|
case '^':
|
|
startl = 1;
|
|
return('|');
|
|
case '>':
|
|
case '<':
|
|
diag(c);
|
|
return(c);
|
|
|
|
case '\n':
|
|
nlseen++;
|
|
gethere();
|
|
startl = 1;
|
|
if (multiline || cf & CONTIN) {
|
|
if (interactive && e.iop <= iostack) {
|
|
#ifdef CONFIG_FEATURE_COMMAND_EDITING
|
|
current_prompt=cprompt->value;
|
|
#else
|
|
prs(cprompt->value);
|
|
#endif
|
|
}
|
|
if (cf & CONTIN)
|
|
goto loop;
|
|
}
|
|
return(c);
|
|
|
|
case '(':
|
|
case ')':
|
|
startl = 1;
|
|
return(c);
|
|
}
|
|
|
|
unget(c);
|
|
|
|
pack:
|
|
while ((c = my_getc(0)) != 0 && !any(c, "`$ '\"\t;&<>()|^\n"))
|
|
if (e.linep >= elinep)
|
|
err("word too long");
|
|
else
|
|
*e.linep++ = c;
|
|
unget(c);
|
|
if(any(c, "\"'`$"))
|
|
goto loop;
|
|
*e.linep++ = '\0';
|
|
if (atstart && (c = rlookup(line))!=0) {
|
|
startl = 1;
|
|
return(c);
|
|
}
|
|
yylval.cp = strsave(line, areanum);
|
|
return(WORD);
|
|
}
|
|
|
|
static int
|
|
collect(c, c1)
|
|
register int c, c1;
|
|
{
|
|
char s[2];
|
|
|
|
*e.linep++ = c;
|
|
while ((c = my_getc(c1)) != c1) {
|
|
if (c == 0) {
|
|
unget(c);
|
|
s[0] = c1;
|
|
s[1] = 0;
|
|
prs("no closing "); yyerror(s);
|
|
return(YYERRCODE);
|
|
}
|
|
if (interactive && c == '\n' && e.iop <= iostack) {
|
|
#ifdef CONFIG_FEATURE_COMMAND_EDITING
|
|
current_prompt=cprompt->value;
|
|
#else
|
|
prs(cprompt->value);
|
|
#endif
|
|
}
|
|
*e.linep++ = c;
|
|
}
|
|
*e.linep++ = c;
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
dual(c)
|
|
register int c;
|
|
{
|
|
char s[3];
|
|
register char *cp = s;
|
|
|
|
*cp++ = c;
|
|
*cp++ = my_getc(0);
|
|
*cp = 0;
|
|
if ((c = rlookup(s)) == 0)
|
|
unget(*--cp);
|
|
return(c);
|
|
}
|
|
|
|
static void
|
|
diag(ec)
|
|
register int ec;
|
|
{
|
|
register int c;
|
|
|
|
c = my_getc(0);
|
|
if (c == '>' || c == '<') {
|
|
if (c != ec)
|
|
zzerr();
|
|
yylval.i = ec == '>'? IOWRITE|IOCAT: IOHERE;
|
|
c = my_getc(0);
|
|
} else
|
|
yylval.i = ec == '>'? IOWRITE: IOREAD;
|
|
if (c != '&' || yylval.i == IOHERE)
|
|
unget(c);
|
|
else
|
|
yylval.i |= IODUP;
|
|
}
|
|
|
|
static char *
|
|
tree(size)
|
|
unsigned size;
|
|
{
|
|
register char *t;
|
|
|
|
if ((t = getcell(size)) == NULL) {
|
|
prs("command line too complicated\n");
|
|
fail();
|
|
/* NOTREACHED */
|
|
}
|
|
return(t);
|
|
}
|
|
|
|
/* VARARGS1 */
|
|
/* ARGSUSED */
|
|
|
|
/* -------- exec.c -------- */
|
|
|
|
/*
|
|
* execute tree
|
|
*/
|
|
|
|
|
|
static int
|
|
execute(t, pin, pout, act)
|
|
register struct op *t;
|
|
int *pin, *pout;
|
|
int act;
|
|
{
|
|
register struct op *t1;
|
|
volatile int i, rv, a;
|
|
char *cp, **wp, **wp2;
|
|
struct var *vp;
|
|
struct brkcon bc;
|
|
|
|
#if __GNUC__
|
|
/* Avoid longjmp clobbering */
|
|
(void) ℘
|
|
#endif
|
|
|
|
|
|
if (t == NULL)
|
|
return(0);
|
|
rv = 0;
|
|
a = areanum++;
|
|
wp = (wp2 = t->words) != NULL
|
|
? eval(wp2, t->type == TCOM ? DOALL : DOALL & ~DOKEY)
|
|
: NULL;
|
|
|
|
switch(t->type) {
|
|
case TPAREN:
|
|
rv = execute(t->left, pin, pout, 0);
|
|
break;
|
|
|
|
case TCOM:
|
|
{
|
|
int child;
|
|
rv = forkexec(t, pin, pout, act, wp, &child);
|
|
if (child) {
|
|
exstat = rv;
|
|
leave();
|
|
}
|
|
}
|
|
break;
|
|
|
|
case TPIPE:
|
|
{
|
|
int pv[2];
|
|
if ((rv = openpipe(pv)) < 0)
|
|
break;
|
|
pv[0] = remap(pv[0]);
|
|
pv[1] = remap(pv[1]);
|
|
(void) execute(t->left, pin, pv, 0);
|
|
rv = execute(t->right, pv, pout, 0);
|
|
}
|
|
break;
|
|
|
|
case TLIST:
|
|
(void) execute(t->left, pin, pout, 0);
|
|
rv = execute(t->right, pin, pout, 0);
|
|
break;
|
|
|
|
case TASYNC:
|
|
{
|
|
int hinteractive = interactive;
|
|
|
|
i = vfork();
|
|
if (i != 0) {
|
|
interactive = hinteractive;
|
|
if (i != -1) {
|
|
setval(lookup("!"), putn(i));
|
|
if (pin != NULL)
|
|
closepipe(pin);
|
|
if (interactive) {
|
|
prs(putn(i));
|
|
prs("\n");
|
|
}
|
|
} else
|
|
rv = -1;
|
|
setstatus(rv);
|
|
} else {
|
|
signal(SIGINT, SIG_IGN);
|
|
signal(SIGQUIT, SIG_IGN);
|
|
if (interactive)
|
|
signal(SIGTERM, SIG_DFL);
|
|
interactive = 0;
|
|
if (pin == NULL) {
|
|
close(0);
|
|
open("/dev/null", 0);
|
|
}
|
|
exit(execute(t->left, pin, pout, FEXEC));
|
|
}
|
|
}
|
|
break;
|
|
|
|
case TOR:
|
|
case TAND:
|
|
rv = execute(t->left, pin, pout, 0);
|
|
if ((t1 = t->right)!=NULL && (rv == 0) == (t->type == TAND))
|
|
rv = execute(t1, pin, pout, 0);
|
|
break;
|
|
|
|
case TFOR:
|
|
if (wp == NULL) {
|
|
wp = dolv+1;
|
|
if ((i = dolc) < 0)
|
|
i = 0;
|
|
} else {
|
|
i = -1;
|
|
while (*wp++ != NULL)
|
|
;
|
|
}
|
|
vp = lookup(t->str);
|
|
while (setjmp(bc.brkpt))
|
|
if (isbreak)
|
|
goto broken;
|
|
brkset(&bc);
|
|
for (t1 = t->left; i-- && *wp != NULL;) {
|
|
setval(vp, *wp++);
|
|
rv = execute(t1, pin, pout, 0);
|
|
}
|
|
brklist = brklist->nextlev;
|
|
break;
|
|
|
|
case TWHILE:
|
|
case TUNTIL:
|
|
while (setjmp(bc.brkpt))
|
|
if (isbreak)
|
|
goto broken;
|
|
brkset(&bc);
|
|
t1 = t->left;
|
|
while ((execute(t1, pin, pout, 0) == 0) == (t->type == TWHILE))
|
|
rv = execute(t->right, pin, pout, 0);
|
|
brklist = brklist->nextlev;
|
|
break;
|
|
|
|
case TIF:
|
|
case TELIF:
|
|
if (t->right != NULL) {
|
|
rv = !execute(t->left, pin, pout, 0) ?
|
|
execute(t->right->left, pin, pout, 0):
|
|
execute(t->right->right, pin, pout, 0);
|
|
}
|
|
break;
|
|
|
|
case TCASE:
|
|
if ((cp = evalstr(t->str, DOSUB|DOTRIM)) == 0)
|
|
cp = "";
|
|
if ((t1 = findcase(t->left, cp)) != NULL)
|
|
rv = execute(t1, pin, pout, 0);
|
|
break;
|
|
|
|
case TBRACE:
|
|
/*
|
|
if (iopp = t->ioact)
|
|
while (*iopp)
|
|
if (iosetup(*iopp++, pin!=NULL, pout!=NULL)) {
|
|
rv = -1;
|
|
break;
|
|
}
|
|
*/
|
|
if (rv >= 0 && (t1 = t->left))
|
|
rv = execute(t1, pin, pout, 0);
|
|
break;
|
|
}
|
|
|
|
broken:
|
|
t->words = wp2;
|
|
isbreak = 0;
|
|
freehere(areanum);
|
|
freearea(areanum);
|
|
areanum = a;
|
|
if (interactive && intr) {
|
|
closeall();
|
|
fail();
|
|
}
|
|
if ((i = trapset) != 0) {
|
|
trapset = 0;
|
|
runtrap(i);
|
|
}
|
|
return(rv);
|
|
}
|
|
|
|
static int
|
|
forkexec( register struct op *t, int *pin, int *pout, int act, char **wp, int *pforked)
|
|
{
|
|
int i, rv;
|
|
int (*shcom)(struct op *) = NULL;
|
|
register int f;
|
|
char *cp = NULL;
|
|
struct ioword **iopp;
|
|
int resetsig;
|
|
char **owp;
|
|
|
|
int *hpin = pin;
|
|
int *hpout = pout;
|
|
int hforked;
|
|
char *hwp;
|
|
int hinteractive;
|
|
int hintr;
|
|
struct brkcon * hbrklist;
|
|
int hexecflg;
|
|
|
|
#if __GNUC__
|
|
/* Avoid longjmp clobbering */
|
|
(void) &pin;
|
|
(void) &pout;
|
|
(void) ℘
|
|
(void) &shcom;
|
|
(void) &cp;
|
|
(void) &resetsig;
|
|
(void) &owp;
|
|
#endif
|
|
|
|
owp = wp;
|
|
resetsig = 0;
|
|
*pforked = 0;
|
|
rv = -1; /* system-detected error */
|
|
if (t->type == TCOM) {
|
|
while ((cp = *wp++) != NULL)
|
|
;
|
|
cp = *wp;
|
|
|
|
/* strip all initial assignments */
|
|
/* not correct wrt PATH=yyy command etc */
|
|
if (flag['x'])
|
|
echo (cp ? wp: owp);
|
|
if (cp == NULL && t->ioact == NULL) {
|
|
while ((cp = *owp++) != NULL && assign(cp, COPYV))
|
|
;
|
|
return(setstatus(0));
|
|
}
|
|
else if (cp != NULL)
|
|
shcom = inbuilt(cp);
|
|
}
|
|
t->words = wp;
|
|
f = act;
|
|
if (shcom == NULL && (f & FEXEC) == 0) {
|
|
|
|
hpin = pin;
|
|
hpout = pout;
|
|
hforked = *pforked;
|
|
hwp = *wp;
|
|
hinteractive = interactive;
|
|
hintr = intr;
|
|
hbrklist = brklist;
|
|
hexecflg = execflg;
|
|
|
|
i = vfork();
|
|
if (i != 0) {
|
|
/* who wrote this crappy non vfork safe shit? */
|
|
pin = hpin;
|
|
pout = hpout;
|
|
*pforked = hforked;
|
|
*wp = hwp;
|
|
interactive = hinteractive;
|
|
intr = hintr;
|
|
brklist = hbrklist;
|
|
execflg = hexecflg;
|
|
|
|
*pforked = 0;
|
|
if (i == -1)
|
|
return(rv);
|
|
if (pin != NULL)
|
|
closepipe(pin);
|
|
return(pout==NULL? setstatus(waitfor(i,0)): 0);
|
|
}
|
|
|
|
if (interactive) {
|
|
signal(SIGINT, SIG_IGN);
|
|
signal(SIGQUIT, SIG_IGN);
|
|
resetsig = 1;
|
|
}
|
|
interactive = 0;
|
|
intr = 0;
|
|
(*pforked)++;
|
|
brklist = 0;
|
|
execflg = 0;
|
|
}
|
|
if (owp != NULL)
|
|
while ((cp = *owp++) != NULL && assign(cp, COPYV))
|
|
if (shcom == NULL)
|
|
export(lookup(cp));
|
|
#ifdef COMPIPE
|
|
if ((pin != NULL || pout != NULL) && shcom != NULL && shcom != doexec) {
|
|
err("piping to/from shell builtins not yet done");
|
|
return(-1);
|
|
}
|
|
#endif
|
|
if (pin != NULL) {
|
|
dup2(pin[0], 0);
|
|
closepipe(pin);
|
|
}
|
|
if (pout != NULL) {
|
|
dup2(pout[1], 1);
|
|
closepipe(pout);
|
|
}
|
|
if ((iopp = t->ioact) != NULL) {
|
|
if (shcom != NULL && shcom != doexec) {
|
|
prs(cp);
|
|
err(": cannot redirect shell command");
|
|
return(-1);
|
|
}
|
|
while (*iopp)
|
|
if (iosetup(*iopp++, pin!=NULL, pout!=NULL))
|
|
return(rv);
|
|
}
|
|
if (shcom)
|
|
return(setstatus((*shcom)(t)));
|
|
/* should use FIOCEXCL */
|
|
for (i=FDBASE; i<NOFILE; i++)
|
|
close(i);
|
|
if (resetsig) {
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
}
|
|
if (t->type == TPAREN)
|
|
exit(execute(t->left, NOPIPE, NOPIPE, FEXEC));
|
|
if (wp[0] == NULL)
|
|
exit(0);
|
|
|
|
cp = rexecve(wp[0], wp, makenv());
|
|
prs(wp[0]); prs(": "); warn(cp);
|
|
if (!execflg)
|
|
trap[0] = NULL;
|
|
leave();
|
|
/* NOTREACHED */
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* 0< 1> are ignored as required
|
|
* within pipelines.
|
|
*/
|
|
static int
|
|
iosetup(iop, pipein, pipeout)
|
|
register struct ioword *iop;
|
|
int pipein, pipeout;
|
|
{
|
|
register int u = -1;
|
|
char *cp=NULL, *msg;
|
|
|
|
if (iop->io_unit == IODEFAULT) /* take default */
|
|
iop->io_unit = iop->io_flag&(IOREAD|IOHERE)? 0: 1;
|
|
if (pipein && iop->io_unit == 0)
|
|
return(0);
|
|
if (pipeout && iop->io_unit == 1)
|
|
return(0);
|
|
msg = iop->io_flag&(IOREAD|IOHERE)? "open": "create";
|
|
if ((iop->io_flag & IOHERE) == 0) {
|
|
cp = iop->io_name;
|
|
if ((cp = evalstr(cp, DOSUB|DOTRIM)) == NULL)
|
|
return(1);
|
|
}
|
|
if (iop->io_flag & IODUP) {
|
|
if (cp[1] || (!isdigit(*cp) && *cp != '-')) {
|
|
prs(cp);
|
|
err(": illegal >& argument");
|
|
return(1);
|
|
}
|
|
if (*cp == '-')
|
|
iop->io_flag = IOCLOSE;
|
|
iop->io_flag &= ~(IOREAD|IOWRITE);
|
|
}
|
|
switch (iop->io_flag) {
|
|
case IOREAD:
|
|
u = open(cp, 0);
|
|
break;
|
|
|
|
case IOHERE:
|
|
case IOHERE|IOXHERE:
|
|
u = herein(iop->io_name, iop->io_flag&IOXHERE);
|
|
cp = "here file";
|
|
break;
|
|
|
|
case IOWRITE|IOCAT:
|
|
if ((u = open(cp, 1)) >= 0) {
|
|
lseek(u, (long)0, 2);
|
|
break;
|
|
}
|
|
case IOWRITE:
|
|
u = creat(cp, 0666);
|
|
break;
|
|
|
|
case IODUP:
|
|
u = dup2(*cp-'0', iop->io_unit);
|
|
break;
|
|
|
|
case IOCLOSE:
|
|
close(iop->io_unit);
|
|
return(0);
|
|
}
|
|
if (u < 0) {
|
|
prs(cp);
|
|
prs(": cannot ");
|
|
warn(msg);
|
|
return(1);
|
|
} else {
|
|
if (u != iop->io_unit) {
|
|
dup2(u, iop->io_unit);
|
|
close(u);
|
|
}
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
echo(wp)
|
|
register char **wp;
|
|
{
|
|
register int i;
|
|
|
|
prs("+");
|
|
for (i=0; wp[i]; i++) {
|
|
if (i)
|
|
prs(" ");
|
|
prs(wp[i]);
|
|
}
|
|
prs("\n");
|
|
}
|
|
|
|
static struct op **
|
|
find1case(t, w)
|
|
struct op *t;
|
|
char *w;
|
|
{
|
|
register struct op *t1;
|
|
struct op **tp;
|
|
register char **wp, *cp;
|
|
|
|
if (t == NULL)
|
|
return((struct op **)NULL);
|
|
if (t->type == TLIST) {
|
|
if ((tp = find1case(t->left, w)) != NULL)
|
|
return(tp);
|
|
t1 = t->right; /* TPAT */
|
|
} else
|
|
t1 = t;
|
|
for (wp = t1->words; *wp;)
|
|
if ((cp = evalstr(*wp++, DOSUB)) && gmatch(w, cp))
|
|
return(&t1->left);
|
|
return((struct op **)NULL);
|
|
}
|
|
|
|
static struct op *
|
|
findcase(t, w)
|
|
struct op *t;
|
|
char *w;
|
|
{
|
|
register struct op **tp;
|
|
|
|
return((tp = find1case(t, w)) != NULL? *tp: (struct op *)NULL);
|
|
}
|
|
|
|
/*
|
|
* Enter a new loop level (marked for break/continue).
|
|
*/
|
|
static void
|
|
brkset(bc)
|
|
struct brkcon *bc;
|
|
{
|
|
bc->nextlev = brklist;
|
|
brklist = bc;
|
|
}
|
|
|
|
/*
|
|
* Wait for the last process created.
|
|
* Print a message for each process found
|
|
* that was killed by a signal.
|
|
* Ignore interrupt signals while waiting
|
|
* unless `canintr' is true.
|
|
*/
|
|
static int
|
|
waitfor(lastpid, canintr)
|
|
register int lastpid;
|
|
int canintr;
|
|
{
|
|
register int pid, rv;
|
|
int s;
|
|
int oheedint = heedint;
|
|
|
|
heedint = 0;
|
|
rv = 0;
|
|
do {
|
|
pid = wait(&s);
|
|
if (pid == -1) {
|
|
if (errno != EINTR || canintr)
|
|
break;
|
|
} else {
|
|
if ((rv = WAITSIG(s)) != 0) {
|
|
if (rv < NSIGNAL) {
|
|
if (signame[rv] != NULL) {
|
|
if (pid != lastpid) {
|
|
prn(pid);
|
|
prs(": ");
|
|
}
|
|
prs(signame[rv]);
|
|
}
|
|
} else {
|
|
if (pid != lastpid) {
|
|
prn(pid);
|
|
prs(": ");
|
|
}
|
|
prs("Signal "); prn(rv); prs(" ");
|
|
}
|
|
if (WAITCORE(s))
|
|
prs(" - core dumped");
|
|
if (rv >= NSIGNAL || signame[rv])
|
|
prs("\n");
|
|
rv = -1;
|
|
} else
|
|
rv = WAITVAL(s);
|
|
}
|
|
} while (pid != lastpid);
|
|
heedint = oheedint;
|
|
if (intr) {
|
|
if (interactive) {
|
|
if (canintr)
|
|
intr = 0;
|
|
} else {
|
|
if (exstat == 0) exstat = rv;
|
|
onintr(0);
|
|
}
|
|
}
|
|
return(rv);
|
|
}
|
|
|
|
static int
|
|
setstatus(s)
|
|
register int s;
|
|
{
|
|
exstat = s;
|
|
setval(lookup("?"), putn(s));
|
|
return(s);
|
|
}
|
|
|
|
/*
|
|
* PATH-searching interface to execve.
|
|
* If getenv("PATH") were kept up-to-date,
|
|
* execvp might be used.
|
|
*/
|
|
static char *
|
|
rexecve(c, v, envp)
|
|
char *c, **v, **envp;
|
|
{
|
|
register int i;
|
|
register char *sp, *tp;
|
|
int eacces = 0, asis = 0;
|
|
|
|
#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
|
|
char *name = c;
|
|
#ifdef CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN
|
|
name = bb_get_last_path_component(name);
|
|
#endif
|
|
optind = 1;
|
|
if (find_applet_by_name(name)) {
|
|
/* We have to exec here since we vforked. Running
|
|
* run_applet_by_name() won't work and bad things
|
|
* will happen. */
|
|
execve("/proc/self/exe", v, envp);
|
|
execve("busybox", v, envp);
|
|
}
|
|
#endif
|
|
|
|
sp = any('/', c)? "": path->value;
|
|
asis = *sp == '\0';
|
|
while (asis || *sp != '\0') {
|
|
asis = 0;
|
|
tp = e.linep;
|
|
for (; *sp != '\0'; tp++)
|
|
if ((*tp = *sp++) == ':') {
|
|
asis = *sp == '\0';
|
|
break;
|
|
}
|
|
if (tp != e.linep)
|
|
*tp++ = '/';
|
|
for (i = 0; (*tp++ = c[i++]) != '\0';)
|
|
;
|
|
|
|
execve(e.linep, v, envp);
|
|
switch (errno) {
|
|
case ENOEXEC:
|
|
*v = e.linep;
|
|
tp = *--v;
|
|
*v = e.linep;
|
|
execve(DEFAULT_SHELL, v, envp);
|
|
*v = tp;
|
|
return("no Shell");
|
|
|
|
case ENOMEM:
|
|
return((char*)bb_msg_memory_exhausted);
|
|
|
|
case E2BIG:
|
|
return("argument list too long");
|
|
|
|
case EACCES:
|
|
eacces++;
|
|
break;
|
|
}
|
|
}
|
|
return(errno==ENOENT ? "not found" : "cannot execute");
|
|
}
|
|
|
|
/*
|
|
* Run the command produced by generator `f'
|
|
* applied to stream `arg'.
|
|
*/
|
|
static int
|
|
run(struct ioarg *argp, int (*f)(struct ioarg *))
|
|
{
|
|
struct op *otree;
|
|
struct wdblock *swdlist;
|
|
struct wdblock *siolist;
|
|
jmp_buf ev, rt;
|
|
xint *ofail;
|
|
int rv;
|
|
|
|
#if __GNUC__
|
|
/* Avoid longjmp clobbering */
|
|
(void) &rv;
|
|
#endif
|
|
|
|
areanum++;
|
|
swdlist = wdlist;
|
|
siolist = iolist;
|
|
otree = outtree;
|
|
ofail = failpt;
|
|
rv = -1;
|
|
if (newenv(setjmp(errpt = ev)) == 0) {
|
|
wdlist = 0;
|
|
iolist = 0;
|
|
pushio(argp, f);
|
|
e.iobase = e.iop;
|
|
yynerrs = 0;
|
|
if (setjmp(failpt = rt) == 0 && yyparse() == 0)
|
|
rv = execute(outtree, NOPIPE, NOPIPE, 0);
|
|
quitenv();
|
|
}
|
|
wdlist = swdlist;
|
|
iolist = siolist;
|
|
failpt = ofail;
|
|
outtree = otree;
|
|
freearea(areanum--);
|
|
return(rv);
|
|
}
|
|
|
|
/* -------- do.c -------- */
|
|
|
|
/*
|
|
* built-in commands: doX
|
|
*/
|
|
|
|
static int dohelp(struct op *t )
|
|
{
|
|
int col;
|
|
const struct builtincmd *x;
|
|
|
|
printf("\nBuilt-in commands:\n");
|
|
printf("-------------------\n");
|
|
|
|
for (col=0, x = builtincmds; x->builtinfunc != NULL; x++) {
|
|
if (!x->name)
|
|
continue;
|
|
col += printf("%s%s", ((col == 0) ? "\t" : " "), x->name);
|
|
if (col > 60) {
|
|
printf("\n");
|
|
col = 0;
|
|
}
|
|
}
|
|
#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
|
|
{
|
|
int i;
|
|
const struct BB_applet *applet;
|
|
extern const struct BB_applet applets[];
|
|
extern const size_t NUM_APPLETS;
|
|
|
|
for (i=0, applet = applets; i < NUM_APPLETS; applet++, i++) {
|
|
if (!applet->name)
|
|
continue;
|
|
|
|
col += printf("%s%s", ((col == 0) ? "\t" : " "),
|
|
applet->name);
|
|
if (col > 60) {
|
|
printf("\n");
|
|
col = 0;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
printf("\n\n");
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
|
|
|
|
static int dolabel(struct op *t )
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
dochdir(t)
|
|
register struct op *t;
|
|
{
|
|
register char *cp, *er;
|
|
|
|
if ((cp = t->words[1]) == NULL && (cp = homedir->value) == NULL)
|
|
er = ": no home directory";
|
|
else if(chdir(cp) < 0)
|
|
er = ": bad directory";
|
|
else
|
|
return(0);
|
|
prs(cp != NULL? cp: "cd");
|
|
err(er);
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
doshift(t)
|
|
register struct op *t;
|
|
{
|
|
register int n;
|
|
|
|
n = t->words[1]? getn(t->words[1]): 1;
|
|
if(dolc < n) {
|
|
err("nothing to shift");
|
|
return(1);
|
|
}
|
|
dolv[n] = dolv[0];
|
|
dolv += n;
|
|
dolc -= n;
|
|
setval(lookup("#"), putn(dolc));
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* execute login and newgrp directly
|
|
*/
|
|
static int
|
|
dologin(t)
|
|
struct op *t;
|
|
{
|
|
register char *cp;
|
|
|
|
if (interactive) {
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
}
|
|
cp = rexecve(t->words[0], t->words, makenv());
|
|
prs(t->words[0]); prs(": "); err(cp);
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
doumask(t)
|
|
register struct op *t;
|
|
{
|
|
register int i, n;
|
|
register char *cp;
|
|
|
|
if ((cp = t->words[1]) == NULL) {
|
|
i = umask(0);
|
|
umask(i);
|
|
for (n=3*4; (n-=3) >= 0;)
|
|
putc('0'+((i>>n)&07), stderr);
|
|
putc('\n', stderr);
|
|
} else {
|
|
for (n=0; *cp>='0' && *cp<='9'; cp++)
|
|
n = n*8 + (*cp-'0');
|
|
umask(n);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
doexec(t)
|
|
register struct op *t;
|
|
{
|
|
register int i;
|
|
jmp_buf ex;
|
|
xint *ofail;
|
|
|
|
t->ioact = NULL;
|
|
for(i = 0; (t->words[i]=t->words[i+1]) != NULL; i++)
|
|
;
|
|
if (i == 0)
|
|
return(1);
|
|
execflg = 1;
|
|
ofail = failpt;
|
|
if (setjmp(failpt = ex) == 0)
|
|
execute(t, NOPIPE, NOPIPE, FEXEC);
|
|
failpt = ofail;
|
|
execflg = 0;
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
dodot(t)
|
|
struct op *t;
|
|
{
|
|
register int i;
|
|
register char *sp, *tp;
|
|
char *cp;
|
|
|
|
if ((cp = t->words[1]) == NULL)
|
|
return(0);
|
|
sp = any('/', cp)? ":": path->value;
|
|
while (*sp) {
|
|
tp = e.linep;
|
|
while (*sp && (*tp = *sp++) != ':')
|
|
tp++;
|
|
if (tp != e.linep)
|
|
*tp++ = '/';
|
|
for (i = 0; (*tp++ = cp[i++]) != '\0';)
|
|
;
|
|
if ((i = open(e.linep, 0)) >= 0) {
|
|
exstat = 0;
|
|
next(remap(i));
|
|
return(exstat);
|
|
}
|
|
}
|
|
prs(cp);
|
|
err(": not found");
|
|
return(-1);
|
|
}
|
|
|
|
static int
|
|
dowait(t)
|
|
struct op *t;
|
|
{
|
|
register int i;
|
|
register char *cp;
|
|
|
|
if ((cp = t->words[1]) != NULL) {
|
|
i = getn(cp);
|
|
if (i == 0)
|
|
return(0);
|
|
} else
|
|
i = -1;
|
|
setstatus(waitfor(i, 1));
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
doread(t)
|
|
struct op *t;
|
|
{
|
|
register char *cp, **wp;
|
|
register int nb = 0;
|
|
register int nl = 0;
|
|
|
|
if (t->words[1] == NULL) {
|
|
err("Usage: read name ...");
|
|
return(1);
|
|
}
|
|
for (wp = t->words+1; *wp; wp++) {
|
|
for (cp = e.linep; !nl && cp < elinep-1; cp++)
|
|
if ((nb = read(0, cp, sizeof(*cp))) != sizeof(*cp) ||
|
|
(nl = (*cp == '\n')) ||
|
|
(wp[1] && any(*cp, ifs->value)))
|
|
break;
|
|
*cp = 0;
|
|
if (nb <= 0)
|
|
break;
|
|
setval(lookup(*wp), e.linep);
|
|
}
|
|
return(nb <= 0);
|
|
}
|
|
|
|
static int
|
|
doeval(t)
|
|
register struct op *t;
|
|
{
|
|
return(RUN(awordlist, t->words+1, wdchar));
|
|
}
|
|
|
|
static int
|
|
dotrap(t)
|
|
register struct op *t;
|
|
{
|
|
register int n, i;
|
|
register int resetsig;
|
|
|
|
if (t->words[1] == NULL) {
|
|
for (i=0; i<=_NSIG; i++)
|
|
if (trap[i]) {
|
|
prn(i);
|
|
prs(": ");
|
|
prs(trap[i]);
|
|
prs("\n");
|
|
}
|
|
return(0);
|
|
}
|
|
resetsig = isdigit(*t->words[1]);
|
|
for (i = resetsig ? 1 : 2; t->words[i] != NULL; ++i) {
|
|
n = getsig(t->words[i]);
|
|
freecell(trap[n]);
|
|
trap[n] = 0;
|
|
if (!resetsig) {
|
|
if (*t->words[1] != '\0') {
|
|
trap[n] = strsave(t->words[1], 0);
|
|
setsig(n, sig);
|
|
} else
|
|
setsig(n, SIG_IGN);
|
|
} else {
|
|
if (interactive)
|
|
if (n == SIGINT)
|
|
setsig(n, onintr);
|
|
else
|
|
setsig(n, n == SIGQUIT ? SIG_IGN
|
|
: SIG_DFL);
|
|
else
|
|
setsig(n, SIG_DFL);
|
|
}
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
getsig(s)
|
|
char *s;
|
|
{
|
|
register int n;
|
|
|
|
if ((n = getn(s)) < 0 || n > _NSIG) {
|
|
err("trap: bad signal number");
|
|
n = 0;
|
|
}
|
|
return(n);
|
|
}
|
|
|
|
static void
|
|
setsig( register int n, sighandler_t f)
|
|
{
|
|
if (n == 0)
|
|
return;
|
|
if (signal(n, SIG_IGN) != SIG_IGN || ourtrap[n]) {
|
|
ourtrap[n] = 1;
|
|
signal(n, f);
|
|
}
|
|
}
|
|
|
|
static int
|
|
getn(as)
|
|
char *as;
|
|
{
|
|
register char *s;
|
|
register int n, m;
|
|
|
|
s = as;
|
|
m = 1;
|
|
if (*s == '-') {
|
|
m = -1;
|
|
s++;
|
|
}
|
|
for (n = 0; isdigit(*s); s++)
|
|
n = (n*10) + (*s-'0');
|
|
if (*s) {
|
|
prs(as);
|
|
err(": bad number");
|
|
}
|
|
return(n*m);
|
|
}
|
|
|
|
static int
|
|
dobreak(t)
|
|
struct op *t;
|
|
{
|
|
return(brkcontin(t->words[1], 1));
|
|
}
|
|
|
|
static int
|
|
docontinue(t)
|
|
struct op *t;
|
|
{
|
|
return(brkcontin(t->words[1], 0));
|
|
}
|
|
|
|
static int
|
|
brkcontin(cp, val)
|
|
register char *cp;
|
|
int val;
|
|
{
|
|
register struct brkcon *bc;
|
|
register int nl;
|
|
|
|
nl = cp == NULL? 1: getn(cp);
|
|
if (nl <= 0)
|
|
nl = 999;
|
|
do {
|
|
if ((bc = brklist) == NULL)
|
|
break;
|
|
brklist = bc->nextlev;
|
|
} while (--nl);
|
|
if (nl) {
|
|
err("bad break/continue level");
|
|
return(1);
|
|
}
|
|
isbreak = val;
|
|
longjmp(bc->brkpt, 1);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static int
|
|
doexit(t)
|
|
struct op *t;
|
|
{
|
|
register char *cp;
|
|
|
|
execflg = 0;
|
|
if ((cp = t->words[1]) != NULL)
|
|
setstatus(getn(cp));
|
|
leave();
|
|
/* NOTREACHED */
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
doexport(t)
|
|
struct op *t;
|
|
{
|
|
rdexp(t->words+1, export, EXPORT);
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
doreadonly(t)
|
|
struct op *t;
|
|
{
|
|
rdexp(t->words+1, ronly, RONLY);
|
|
return(0);
|
|
}
|
|
|
|
static void rdexp (char **wp, void (*f)(struct var *), int key)
|
|
{
|
|
if (*wp != NULL) {
|
|
for (; *wp != NULL; wp++) {
|
|
if (isassign(*wp)) {
|
|
char *cp;
|
|
assign(*wp, COPYV);
|
|
for (cp = *wp; *cp != '='; cp++)
|
|
;
|
|
*cp = '\0';
|
|
}
|
|
if (checkname(*wp))
|
|
(*f)(lookup(*wp));
|
|
else
|
|
badid(*wp);
|
|
}
|
|
} else
|
|
putvlist(key, 1);
|
|
}
|
|
|
|
static void
|
|
badid(s)
|
|
register char *s;
|
|
{
|
|
prs(s);
|
|
err(": bad identifier");
|
|
}
|
|
|
|
static int
|
|
doset(t)
|
|
register struct op *t;
|
|
{
|
|
register struct var *vp;
|
|
register char *cp;
|
|
register int n;
|
|
|
|
if ((cp = t->words[1]) == NULL) {
|
|
for (vp = vlist; vp; vp = vp->next)
|
|
varput(vp->name, 1);
|
|
return(0);
|
|
}
|
|
if (*cp == '-') {
|
|
/* bad: t->words++; */
|
|
for(n = 0; (t->words[n]=t->words[n+1]) != NULL; n++)
|
|
;
|
|
if (*++cp == 0)
|
|
flag['x'] = flag['v'] = 0;
|
|
else
|
|
for (; *cp; cp++)
|
|
switch (*cp) {
|
|
case 'e':
|
|
if (!interactive)
|
|
flag['e']++;
|
|
break;
|
|
|
|
default:
|
|
if (*cp>='a' && *cp<='z')
|
|
flag[(int)*cp]++;
|
|
break;
|
|
}
|
|
setdash();
|
|
}
|
|
if (t->words[1]) {
|
|
t->words[0] = dolv[0];
|
|
for (n=1; t->words[n]; n++)
|
|
setarea((char *)t->words[n], 0);
|
|
dolc = n-1;
|
|
dolv = t->words;
|
|
setval(lookup("#"), putn(dolc));
|
|
setarea((char *)(dolv-1), 0);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
varput(s, out)
|
|
register char *s;
|
|
int out;
|
|
{
|
|
if (isalnum(*s) || *s == '_') {
|
|
write(out, s, strlen(s));
|
|
write(out, "\n", 1);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Copyright (c) 1999 Herbert Xu <herbert@debian.org>
|
|
* This file contains code for the times builtin.
|
|
*/
|
|
static int dotimes(struct op *t )
|
|
{
|
|
struct tms buf;
|
|
long int clk_tck = sysconf(_SC_CLK_TCK);
|
|
|
|
times(&buf);
|
|
printf("%dm%fs %dm%fs\n%dm%fs %dm%fs\n",
|
|
(int) (buf.tms_utime / clk_tck / 60),
|
|
((double) buf.tms_utime) / clk_tck,
|
|
(int) (buf.tms_stime / clk_tck / 60),
|
|
((double) buf.tms_stime) / clk_tck,
|
|
(int) (buf.tms_cutime / clk_tck / 60),
|
|
((double) buf.tms_cutime) / clk_tck,
|
|
(int) (buf.tms_cstime / clk_tck / 60),
|
|
((double) buf.tms_cstime) / clk_tck);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int(*inbuilt(char *s))(struct op *)
|
|
{
|
|
const struct builtincmd *bp;
|
|
|
|
for (bp = builtincmds; bp->name != NULL; bp++)
|
|
if (strcmp(bp->name, s) == 0)
|
|
return(bp->builtinfunc);
|
|
|
|
return(NULL);
|
|
}
|
|
|
|
/* -------- eval.c -------- */
|
|
|
|
/*
|
|
* ${}
|
|
* `command`
|
|
* blank interpretation
|
|
* quoting
|
|
* glob
|
|
*/
|
|
|
|
static char ** eval( char **ap, int f)
|
|
{
|
|
struct wdblock *wb;
|
|
char **wp;
|
|
char **wf;
|
|
jmp_buf ev;
|
|
|
|
#if __GNUC__
|
|
/* Avoid longjmp clobbering */
|
|
(void) ℘
|
|
(void) ≈
|
|
#endif
|
|
wp = NULL;
|
|
wb = NULL;
|
|
wf = NULL;
|
|
if (newenv(setjmp(errpt = ev)) == 0) {
|
|
while (*ap && isassign(*ap))
|
|
expand(*ap++, &wb, f & ~DOGLOB);
|
|
if (flag['k']) {
|
|
for (wf = ap; *wf; wf++) {
|
|
if (isassign(*wf))
|
|
expand(*wf, &wb, f & ~DOGLOB);
|
|
}
|
|
}
|
|
for (wb = addword((char *)0, wb); *ap; ap++) {
|
|
if (!flag['k'] || !isassign(*ap))
|
|
expand(*ap, &wb, f & ~DOKEY);
|
|
}
|
|
wb = addword((char *)0, wb);
|
|
wp = getwords(wb);
|
|
quitenv();
|
|
} else
|
|
gflg = 1;
|
|
return(gflg? (char **)NULL: wp);
|
|
}
|
|
|
|
/*
|
|
* Make the exported environment from the exported
|
|
* names in the dictionary. Keyword assignments
|
|
* will already have been done.
|
|
*/
|
|
static char **
|
|
makenv()
|
|
|
|
{
|
|
register struct wdblock *wb;
|
|
register struct var *vp;
|
|
|
|
wb = NULL;
|
|
for (vp = vlist; vp; vp = vp->next)
|
|
if (vp->status & EXPORT)
|
|
wb = addword(vp->name, wb);
|
|
wb = addword((char *)0, wb);
|
|
return(getwords(wb));
|
|
}
|
|
|
|
static char *
|
|
evalstr(cp, f)
|
|
register char *cp;
|
|
int f;
|
|
{
|
|
struct wdblock *wb;
|
|
|
|
wb = NULL;
|
|
if (expand(cp, &wb, f)) {
|
|
if (wb == NULL || wb->w_nword == 0 || (cp = wb->w_words[0]) == NULL)
|
|
cp = "";
|
|
DELETE(wb);
|
|
} else
|
|
cp = NULL;
|
|
return(cp);
|
|
}
|
|
|
|
static int
|
|
expand( char *cp, register struct wdblock **wbp, int f)
|
|
{
|
|
jmp_buf ev;
|
|
|
|
#if __GNUC__
|
|
/* Avoid longjmp clobbering */
|
|
(void) &cp;
|
|
#endif
|
|
gflg = 0;
|
|
if (cp == NULL)
|
|
return(0);
|
|
if (!anys("$`'\"", cp) &&
|
|
!anys(ifs->value, cp) &&
|
|
((f&DOGLOB)==0 || !anys("[*?", cp))) {
|
|
cp = strsave(cp, areanum);
|
|
if (f & DOTRIM)
|
|
unquote(cp);
|
|
*wbp = addword(cp, *wbp);
|
|
return(1);
|
|
}
|
|
if (newenv(setjmp(errpt = ev)) == 0) {
|
|
PUSHIO(aword, cp, strchar);
|
|
e.iobase = e.iop;
|
|
while ((cp = blank(f)) && gflg == 0) {
|
|
e.linep = cp;
|
|
cp = strsave(cp, areanum);
|
|
if ((f&DOGLOB) == 0) {
|
|
if (f & DOTRIM)
|
|
unquote(cp);
|
|
*wbp = addword(cp, *wbp);
|
|
} else
|
|
*wbp = glob(cp, *wbp);
|
|
}
|
|
quitenv();
|
|
} else
|
|
gflg = 1;
|
|
return(gflg == 0);
|
|
}
|
|
|
|
/*
|
|
* Blank interpretation and quoting
|
|
*/
|
|
static char *
|
|
blank(f)
|
|
int f;
|
|
{
|
|
register int c, c1;
|
|
register char *sp;
|
|
int scanequals, foundequals;
|
|
|
|
sp = e.linep;
|
|
scanequals = f & DOKEY;
|
|
foundequals = 0;
|
|
|
|
loop:
|
|
switch (c = subgetc('"', foundequals)) {
|
|
case 0:
|
|
if (sp == e.linep)
|
|
return(0);
|
|
*e.linep++ = 0;
|
|
return(sp);
|
|
|
|
default:
|
|
if (f & DOBLANK && any(c, ifs->value))
|
|
goto loop;
|
|
break;
|
|
|
|
case '"':
|
|
case '\'':
|
|
scanequals = 0;
|
|
if (INSUB())
|
|
break;
|
|
for (c1 = c; (c = subgetc(c1, 1)) != c1;) {
|
|
if (c == 0)
|
|
break;
|
|
if (c == '\'' || !any(c, "$`\""))
|
|
c |= QUOTE;
|
|
*e.linep++ = c;
|
|
}
|
|
c = 0;
|
|
}
|
|
unget(c);
|
|
if (!isalpha(c) && c != '_')
|
|
scanequals = 0;
|
|
for (;;) {
|
|
c = subgetc('"', foundequals);
|
|
if (c == 0 ||
|
|
f & (DOBLANK && any(c, ifs->value)) ||
|
|
(!INSUB() && any(c, "\"'"))) {
|
|
scanequals = 0;
|
|
unget(c);
|
|
if (any(c, "\"'"))
|
|
goto loop;
|
|
break;
|
|
}
|
|
if (scanequals) {
|
|
if (c == '=') {
|
|
foundequals = 1;
|
|
scanequals = 0;
|
|
}
|
|
else if (!isalnum(c) && c != '_')
|
|
scanequals = 0;
|
|
}
|
|
*e.linep++ = c;
|
|
}
|
|
*e.linep++ = 0;
|
|
return(sp);
|
|
}
|
|
|
|
/*
|
|
* Get characters, substituting for ` and $
|
|
*/
|
|
static int
|
|
subgetc(ec, quoted)
|
|
register char ec;
|
|
int quoted;
|
|
{
|
|
register char c;
|
|
|
|
again:
|
|
c = my_getc(ec);
|
|
if (!INSUB() && ec != '\'') {
|
|
if (c == '`') {
|
|
if (grave(quoted) == 0)
|
|
return(0);
|
|
e.iop->task = XGRAVE;
|
|
goto again;
|
|
}
|
|
if (c == '$' && (c = dollar(quoted)) == 0) {
|
|
e.iop->task = XDOLL;
|
|
goto again;
|
|
}
|
|
}
|
|
return(c);
|
|
}
|
|
|
|
/*
|
|
* Prepare to generate the string returned by ${} substitution.
|
|
*/
|
|
static int
|
|
dollar(quoted)
|
|
int quoted;
|
|
{
|
|
int otask;
|
|
struct io *oiop;
|
|
char *dolp;
|
|
register char *s, c, *cp=NULL;
|
|
struct var *vp;
|
|
|
|
c = readc();
|
|
s = e.linep;
|
|
if (c != '{') {
|
|
*e.linep++ = c;
|
|
if (isalpha(c) || c == '_') {
|
|
while ((c = readc())!=0 && (isalnum(c) || c == '_'))
|
|
if (e.linep < elinep)
|
|
*e.linep++ = c;
|
|
unget(c);
|
|
}
|
|
c = 0;
|
|
} else {
|
|
oiop = e.iop;
|
|
otask = e.iop->task;
|
|
e.iop->task = XOTHER;
|
|
while ((c = subgetc('"', 0))!=0 && c!='}' && c!='\n')
|
|
if (e.linep < elinep)
|
|
*e.linep++ = c;
|
|
if (oiop == e.iop)
|
|
e.iop->task = otask;
|
|
if (c != '}') {
|
|
err("unclosed ${");
|
|
gflg++;
|
|
return(c);
|
|
}
|
|
}
|
|
if (e.linep >= elinep) {
|
|
err("string in ${} too long");
|
|
gflg++;
|
|
e.linep -= 10;
|
|
}
|
|
*e.linep = 0;
|
|
if (*s)
|
|
for (cp = s+1; *cp; cp++)
|
|
if (any(*cp, "=-+?")) {
|
|
c = *cp;
|
|
*cp++ = 0;
|
|
break;
|
|
}
|
|
if (s[1] == 0 && (*s == '*' || *s == '@')) {
|
|
if (dolc > 1) {
|
|
/* currently this does not distinguish $* and $@ */
|
|
/* should check dollar */
|
|
e.linep = s;
|
|
PUSHIO(awordlist, dolv+1, dolchar);
|
|
return(0);
|
|
} else { /* trap the nasty ${=} */
|
|
s[0] = '1';
|
|
s[1] = 0;
|
|
}
|
|
}
|
|
vp = lookup(s);
|
|
if ((dolp = vp->value) == null) {
|
|
switch (c) {
|
|
case '=':
|
|
if (isdigit(*s)) {
|
|
err("cannot use ${...=...} with $n");
|
|
gflg++;
|
|
break;
|
|
}
|
|
setval(vp, cp);
|
|
dolp = vp->value;
|
|
break;
|
|
|
|
case '-':
|
|
dolp = strsave(cp, areanum);
|
|
break;
|
|
|
|
case '?':
|
|
if (*cp == 0) {
|
|
prs("missing value for ");
|
|
err(s);
|
|
} else
|
|
err(cp);
|
|
gflg++;
|
|
break;
|
|
}
|
|
} else if (c == '+')
|
|
dolp = strsave(cp, areanum);
|
|
if (flag['u'] && dolp == null) {
|
|
prs("unset variable: ");
|
|
err(s);
|
|
gflg++;
|
|
}
|
|
e.linep = s;
|
|
PUSHIO(aword, dolp, quoted ? qstrchar : strchar);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Run the command in `...` and read its output.
|
|
*/
|
|
|
|
static int
|
|
grave(quoted)
|
|
int quoted;
|
|
{
|
|
char *cp;
|
|
register int i;
|
|
int j;
|
|
int pf[2];
|
|
static char child_cmd[LINELIM];
|
|
char *src;
|
|
char *dest;
|
|
int count;
|
|
int ignore;
|
|
int ignore_once;
|
|
char *argument_list[4];
|
|
|
|
#if __GNUC__
|
|
/* Avoid longjmp clobbering */
|
|
(void) &cp;
|
|
#endif
|
|
|
|
for (cp = e.iop->argp->aword; *cp != '`'; cp++)
|
|
if (*cp == 0) {
|
|
err("no closing `");
|
|
return(0);
|
|
}
|
|
|
|
/* string copy with dollar expansion */
|
|
src = e.iop->argp->aword;
|
|
dest = child_cmd;
|
|
count = 0;
|
|
ignore = 0;
|
|
ignore_once = 0;
|
|
while ((*src != '`') && (count < LINELIM)) {
|
|
if (*src == '\'')
|
|
ignore = !ignore;
|
|
if (*src == '\\')
|
|
ignore_once = 1;
|
|
if (*src == '$' && !ignore && !ignore_once) {
|
|
struct var *vp;
|
|
char var_name[LINELIM];
|
|
char alt_value[LINELIM];
|
|
int var_index = 0;
|
|
int alt_index = 0;
|
|
char operator = 0;
|
|
int braces = 0;
|
|
char *value;
|
|
|
|
src++;
|
|
if (*src == '{') {
|
|
braces = 1;
|
|
src++;
|
|
}
|
|
|
|
var_name[var_index++] = *src++;
|
|
while (isalnum(*src))
|
|
var_name[var_index++] = *src++;
|
|
var_name[var_index] = 0;
|
|
|
|
if (braces) {
|
|
switch (*src) {
|
|
case '}':
|
|
break;
|
|
case '-':
|
|
case '=':
|
|
case '+':
|
|
case '?':
|
|
operator = *src;
|
|
break;
|
|
default:
|
|
err("unclosed ${\n");
|
|
return(0);
|
|
}
|
|
if (operator) {
|
|
src++;
|
|
while (*src && (*src != '}')) {
|
|
alt_value[alt_index++] = *src++;
|
|
}
|
|
alt_value[alt_index] = 0;
|
|
if (*src != '}') {
|
|
err("unclosed ${\n");
|
|
return(0);
|
|
}
|
|
}
|
|
src++;
|
|
}
|
|
|
|
vp = lookup(var_name);
|
|
if (vp->value != null)
|
|
value = (operator == '+')? alt_value : vp->value;
|
|
else if (operator == '?') {
|
|
err(alt_value);
|
|
return(0);
|
|
} else if (alt_index && (operator != '+')) {
|
|
value = alt_value;
|
|
if (operator == '=')
|
|
setval(vp, value);
|
|
} else
|
|
continue;
|
|
|
|
while (*value && (count < LINELIM)) {
|
|
*dest++ = *value++;
|
|
count++;
|
|
}
|
|
} else {
|
|
*dest++ = *src++;
|
|
count++;
|
|
ignore_once = 0;
|
|
}
|
|
}
|
|
*dest = '\0';
|
|
|
|
if (openpipe(pf) < 0)
|
|
return(0);
|
|
while ((i = vfork()) == -1 && errno == EAGAIN)
|
|
;
|
|
if (i < 0) {
|
|
closepipe(pf);
|
|
err((char*)bb_msg_memory_exhausted);
|
|
return(0);
|
|
}
|
|
if (i != 0) {
|
|
waitpid(i, NULL, 0);
|
|
e.iop->argp->aword = ++cp;
|
|
close(pf[1]);
|
|
PUSHIO(afile, remap(pf[0]), (int(*)(struct ioarg *))((quoted)? qgravechar: gravechar));
|
|
return(1);
|
|
}
|
|
/* allow trapped signals */
|
|
/* XXX - Maybe this signal stuff should go as well? */
|
|
for (j=0; j<=_NSIG; j++)
|
|
if (ourtrap[j] && signal(j, SIG_IGN) != SIG_IGN)
|
|
signal(j, SIG_DFL);
|
|
|
|
dup2(pf[1], 1);
|
|
closepipe(pf);
|
|
|
|
argument_list[0] = (char *)DEFAULT_SHELL;
|
|
argument_list[1] = "-c";
|
|
argument_list[2] = child_cmd;
|
|
argument_list[3] = 0;
|
|
|
|
prs(rexecve(argument_list[0], argument_list, makenv()));
|
|
_exit(1);
|
|
}
|
|
|
|
|
|
static char *
|
|
unquote(as)
|
|
register char *as;
|
|
{
|
|
register char *s;
|
|
|
|
if ((s = as) != NULL)
|
|
while (*s)
|
|
*s++ &= ~QUOTE;
|
|
return(as);
|
|
}
|
|
|
|
/* -------- glob.c -------- */
|
|
|
|
/*
|
|
* glob
|
|
*/
|
|
|
|
#define scopy(x) strsave((x), areanum)
|
|
#define BLKSIZ 512
|
|
#define NDENT ((BLKSIZ+sizeof(struct dirent)-1)/sizeof(struct dirent))
|
|
|
|
static struct wdblock *cl, *nl;
|
|
static char spcl[] = "[?*";
|
|
|
|
static struct wdblock *
|
|
glob(cp, wb)
|
|
char *cp;
|
|
struct wdblock *wb;
|
|
{
|
|
register int i;
|
|
register char *pp;
|
|
|
|
if (cp == 0)
|
|
return(wb);
|
|
i = 0;
|
|
for (pp = cp; *pp; pp++)
|
|
if (any(*pp, spcl))
|
|
i++;
|
|
else if (!any(*pp & ~QUOTE, spcl))
|
|
*pp &= ~QUOTE;
|
|
if (i != 0) {
|
|
for (cl = addword(scopy(cp), (struct wdblock *)0); anyspcl(cl); cl = nl) {
|
|
nl = newword(cl->w_nword*2);
|
|
for(i=0; i<cl->w_nword; i++) { /* for each argument */
|
|
for (pp = cl->w_words[i]; *pp; pp++)
|
|
if (any(*pp, spcl)) {
|
|
globname(cl->w_words[i], pp);
|
|
break;
|
|
}
|
|
if (*pp == '\0')
|
|
nl = addword(scopy(cl->w_words[i]), nl);
|
|
}
|
|
for(i=0; i<cl->w_nword; i++)
|
|
DELETE(cl->w_words[i]);
|
|
DELETE(cl);
|
|
}
|
|
for(i=0; i<cl->w_nword; i++)
|
|
unquote(cl->w_words[i]);
|
|
glob0((char *)cl->w_words, cl->w_nword, sizeof(char *), xstrcmp);
|
|
if (cl->w_nword) {
|
|
for (i=0; i<cl->w_nword; i++)
|
|
wb = addword(cl->w_words[i], wb);
|
|
DELETE(cl);
|
|
return(wb);
|
|
}
|
|
}
|
|
wb = addword(unquote(cp), wb);
|
|
return(wb);
|
|
}
|
|
|
|
static void
|
|
globname(we, pp)
|
|
char *we;
|
|
register char *pp;
|
|
{
|
|
register char *np, *cp;
|
|
char *name, *gp, *dp;
|
|
int k;
|
|
DIR *dirp;
|
|
struct dirent *de;
|
|
char dname[NAME_MAX+1];
|
|
struct stat dbuf;
|
|
|
|
for (np = we; np != pp; pp--)
|
|
if (pp[-1] == '/')
|
|
break;
|
|
for (dp = cp = space((int)(pp-np)+3); np < pp;)
|
|
*cp++ = *np++;
|
|
*cp++ = '.';
|
|
*cp = '\0';
|
|
for (gp = cp = space(strlen(pp)+1); *np && *np != '/';)
|
|
*cp++ = *np++;
|
|
*cp = '\0';
|
|
dirp = opendir(dp);
|
|
if (dirp == 0) {
|
|
DELETE(dp);
|
|
DELETE(gp);
|
|
return;
|
|
}
|
|
dname[NAME_MAX] = '\0';
|
|
while ((de=readdir(dirp))!=NULL) {
|
|
/* XXX Hmmm... What this could be? (abial) */
|
|
/*
|
|
if (ent[j].d_ino == 0)
|
|
continue;
|
|
*/
|
|
strncpy(dname, de->d_name, NAME_MAX);
|
|
if (dname[0] == '.')
|
|
if (*gp != '.')
|
|
continue;
|
|
for(k=0; k<NAME_MAX; k++)
|
|
if (any(dname[k], spcl))
|
|
dname[k] |= QUOTE;
|
|
if (gmatch(dname, gp)) {
|
|
name = generate(we, pp, dname, np);
|
|
if (*np && !anys(np, spcl)) {
|
|
if (stat(name,&dbuf)) {
|
|
DELETE(name);
|
|
continue;
|
|
}
|
|
}
|
|
nl = addword(name, nl);
|
|
}
|
|
}
|
|
closedir(dirp);
|
|
DELETE(dp);
|
|
DELETE(gp);
|
|
}
|
|
|
|
/*
|
|
* generate a pathname as below.
|
|
* start..end1 / middle end
|
|
* the slashes come for free
|
|
*/
|
|
static char *
|
|
generate(start1, end1, middle, end)
|
|
char *start1;
|
|
register char *end1;
|
|
char *middle, *end;
|
|
{
|
|
char *p;
|
|
register char *op, *xp;
|
|
|
|
p = op = space((int)(end1-start1)+strlen(middle)+strlen(end)+2);
|
|
for (xp = start1; xp != end1;)
|
|
*op++ = *xp++;
|
|
for (xp = middle; (*op++ = *xp++) != '\0';)
|
|
;
|
|
op--;
|
|
for (xp = end; (*op++ = *xp++) != '\0';)
|
|
;
|
|
return(p);
|
|
}
|
|
|
|
static int
|
|
anyspcl(wb)
|
|
register struct wdblock *wb;
|
|
{
|
|
register int i;
|
|
register char **wd;
|
|
|
|
wd = wb->w_words;
|
|
for (i=0; i<wb->w_nword; i++)
|
|
if (anys(spcl, *wd++))
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
xstrcmp(p1, p2)
|
|
char *p1, *p2;
|
|
{
|
|
return(strcmp(*(char **)p1, *(char **)p2));
|
|
}
|
|
|
|
/* -------- word.c -------- */
|
|
|
|
static struct wdblock *
|
|
newword(nw)
|
|
register int nw;
|
|
{
|
|
register struct wdblock *wb;
|
|
|
|
wb = (struct wdblock *) space(sizeof(*wb) + nw*sizeof(char *));
|
|
wb->w_bsize = nw;
|
|
wb->w_nword = 0;
|
|
return(wb);
|
|
}
|
|
|
|
static struct wdblock *
|
|
addword(wd, wb)
|
|
char *wd;
|
|
register struct wdblock *wb;
|
|
{
|
|
register struct wdblock *wb2;
|
|
register int nw;
|
|
|
|
if (wb == NULL)
|
|
wb = newword(NSTART);
|
|
if ((nw = wb->w_nword) >= wb->w_bsize) {
|
|
wb2 = newword(nw * 2);
|
|
memcpy((char *)wb2->w_words, (char *)wb->w_words, nw*sizeof(char *));
|
|
wb2->w_nword = nw;
|
|
DELETE(wb);
|
|
wb = wb2;
|
|
}
|
|
wb->w_words[wb->w_nword++] = wd;
|
|
return(wb);
|
|
}
|
|
static
|
|
char **
|
|
getwords(wb)
|
|
register struct wdblock *wb;
|
|
{
|
|
register char **wd;
|
|
register int nb;
|
|
|
|
if (wb == NULL)
|
|
return((char **)NULL);
|
|
if (wb->w_nword == 0) {
|
|
DELETE(wb);
|
|
return((char **)NULL);
|
|
}
|
|
wd = (char **) space(nb = sizeof(*wd) * wb->w_nword);
|
|
memcpy((char *)wd, (char *)wb->w_words, nb);
|
|
DELETE(wb); /* perhaps should done by caller */
|
|
return(wd);
|
|
}
|
|
|
|
int (*func)(char *, char *);
|
|
int globv;
|
|
|
|
static void
|
|
glob0(a0, a1, a2, a3)
|
|
char *a0;
|
|
unsigned a1;
|
|
int a2;
|
|
int (*a3) (char *, char *);
|
|
{
|
|
func = a3;
|
|
globv = a2;
|
|
glob1(a0, a0 + a1 * a2);
|
|
}
|
|
|
|
static void
|
|
glob1(base, lim)
|
|
char *base, *lim;
|
|
{
|
|
register char *i, *j;
|
|
int v2;
|
|
char *lptr, *hptr;
|
|
int c;
|
|
unsigned n;
|
|
|
|
|
|
v2 = globv;
|
|
|
|
top:
|
|
if ((n=(int)(lim-base)) <= v2)
|
|
return;
|
|
n = v2 * (n / (2*v2));
|
|
hptr = lptr = base+n;
|
|
i = base;
|
|
j = lim-v2;
|
|
for(;;) {
|
|
if (i < lptr) {
|
|
if ((c = (*func)(i, lptr)) == 0) {
|
|
glob2(i, lptr -= v2);
|
|
continue;
|
|
}
|
|
if (c < 0) {
|
|
i += v2;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
begin:
|
|
if (j > hptr) {
|
|
if ((c = (*func)(hptr, j)) == 0) {
|
|
glob2(hptr += v2, j);
|
|
goto begin;
|
|
}
|
|
if (c > 0) {
|
|
if (i == lptr) {
|
|
glob3(i, hptr += v2, j);
|
|
i = lptr += v2;
|
|
goto begin;
|
|
}
|
|
glob2(i, j);
|
|
j -= v2;
|
|
i += v2;
|
|
continue;
|
|
}
|
|
j -= v2;
|
|
goto begin;
|
|
}
|
|
|
|
|
|
if (i == lptr) {
|
|
if (lptr-base >= lim-hptr) {
|
|
glob1(hptr+v2, lim);
|
|
lim = lptr;
|
|
} else {
|
|
glob1(base, lptr);
|
|
base = hptr+v2;
|
|
}
|
|
goto top;
|
|
}
|
|
|
|
|
|
glob3(j, lptr -= v2, i);
|
|
j = hptr -= v2;
|
|
}
|
|
}
|
|
|
|
static void
|
|
glob2(i, j)
|
|
char *i, *j;
|
|
{
|
|
register char *index1, *index2, c;
|
|
int m;
|
|
|
|
m = globv;
|
|
index1 = i;
|
|
index2 = j;
|
|
do {
|
|
c = *index1;
|
|
*index1++ = *index2;
|
|
*index2++ = c;
|
|
} while(--m);
|
|
}
|
|
|
|
static void
|
|
glob3(i, j, k)
|
|
char *i, *j, *k;
|
|
{
|
|
register char *index1, *index2, *index3;
|
|
int c;
|
|
int m;
|
|
|
|
m = globv;
|
|
index1 = i;
|
|
index2 = j;
|
|
index3 = k;
|
|
do {
|
|
c = *index1;
|
|
*index1++ = *index3;
|
|
*index3++ = *index2;
|
|
*index2++ = c;
|
|
} while(--m);
|
|
}
|
|
|
|
/* -------- io.c -------- */
|
|
|
|
/*
|
|
* shell IO
|
|
*/
|
|
|
|
static int my_getc( int ec)
|
|
{
|
|
register int c;
|
|
|
|
if(e.linep > elinep) {
|
|
while((c=readc()) != '\n' && c)
|
|
;
|
|
err("input line too long");
|
|
gflg++;
|
|
return(c);
|
|
}
|
|
c = readc();
|
|
if ((ec != '\'') && (ec != '`') && (e.iop->task != XGRAVE)) {
|
|
if(c == '\\') {
|
|
c = readc();
|
|
if (c == '\n' && ec != '\"')
|
|
return(my_getc(ec));
|
|
c |= QUOTE;
|
|
}
|
|
}
|
|
return(c);
|
|
}
|
|
|
|
static void
|
|
unget(c)
|
|
int c;
|
|
{
|
|
if (e.iop >= e.iobase)
|
|
e.iop->peekc = c;
|
|
}
|
|
|
|
static int
|
|
eofc()
|
|
|
|
{
|
|
return e.iop < e.iobase || (e.iop->peekc == 0 && e.iop->prev == 0);
|
|
}
|
|
|
|
static int
|
|
readc()
|
|
{
|
|
register int c;
|
|
|
|
for (; e.iop >= e.iobase; e.iop--)
|
|
if ((c = e.iop->peekc) != '\0') {
|
|
e.iop->peekc = 0;
|
|
return(c);
|
|
}
|
|
else {
|
|
if (e.iop->prev != 0) {
|
|
if ((c = (*e.iop->iofn)(e.iop->argp, e.iop)) != '\0') {
|
|
if (c == -1) {
|
|
e.iop++;
|
|
continue;
|
|
}
|
|
if (e.iop == iostack)
|
|
ioecho(c);
|
|
return(e.iop->prev = c);
|
|
}
|
|
else if (e.iop->task == XIO && e.iop->prev != '\n') {
|
|
e.iop->prev = 0;
|
|
if (e.iop == iostack)
|
|
ioecho('\n');
|
|
return '\n';
|
|
}
|
|
}
|
|
if (e.iop->task == XIO) {
|
|
if (multiline)
|
|
return e.iop->prev = 0;
|
|
if (interactive && e.iop == iostack+1) {
|
|
#ifdef CONFIG_FEATURE_COMMAND_EDITING
|
|
current_prompt=prompt->value;
|
|
#else
|
|
prs(prompt->value);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
if (e.iop >= iostack)
|
|
return(0);
|
|
leave();
|
|
/* NOTREACHED */
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
ioecho(c)
|
|
char c;
|
|
{
|
|
if (flag['v'])
|
|
write(2, &c, sizeof c);
|
|
}
|
|
|
|
static void
|
|
pushio(struct ioarg *argp, int (*fn)(struct ioarg *))
|
|
{
|
|
if (++e.iop >= &iostack[NPUSH]) {
|
|
e.iop--;
|
|
err("Shell input nested too deeply");
|
|
gflg++;
|
|
return;
|
|
}
|
|
e.iop->iofn = (int (*)(struct ioarg *, struct io *))fn;
|
|
|
|
if (argp->afid != AFID_NOBUF)
|
|
e.iop->argp = argp;
|
|
else {
|
|
e.iop->argp = ioargstack + (e.iop - iostack);
|
|
*e.iop->argp = *argp;
|
|
e.iop->argp->afbuf = e.iop == &iostack[0] ? &mainbuf : &sharedbuf;
|
|
if (isatty(e.iop->argp->afile) == 0 &&
|
|
(e.iop == &iostack[0] ||
|
|
lseek(e.iop->argp->afile, 0L, 1) != -1)) {
|
|
if (++bufid == AFID_NOBUF)
|
|
bufid = AFID_ID;
|
|
e.iop->argp->afid = bufid;
|
|
}
|
|
}
|
|
|
|
e.iop->prev = ~'\n';
|
|
e.iop->peekc = 0;
|
|
e.iop->xchar = 0;
|
|
e.iop->nlcount = 0;
|
|
if (fn == filechar || fn == linechar)
|
|
e.iop->task = XIO;
|
|
else if (fn == (int(*)(struct ioarg *))gravechar || fn == (int(*)(struct ioarg *))qgravechar)
|
|
e.iop->task = XGRAVE;
|
|
else
|
|
e.iop->task = XOTHER;
|
|
}
|
|
|
|
static struct io *
|
|
setbase(ip)
|
|
struct io *ip;
|
|
{
|
|
register struct io *xp;
|
|
|
|
xp = e.iobase;
|
|
e.iobase = ip;
|
|
return(xp);
|
|
}
|
|
|
|
/*
|
|
* Input generating functions
|
|
*/
|
|
|
|
/*
|
|
* Produce the characters of a string, then a newline, then EOF.
|
|
*/
|
|
static int
|
|
nlchar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
register int c;
|
|
|
|
if (ap->aword == NULL)
|
|
return(0);
|
|
if ((c = *ap->aword++) == 0) {
|
|
ap->aword = NULL;
|
|
return('\n');
|
|
}
|
|
return(c);
|
|
}
|
|
|
|
/*
|
|
* Given a list of words, produce the characters
|
|
* in them, with a space after each word.
|
|
*/
|
|
static int
|
|
wdchar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
register char c;
|
|
register char **wl;
|
|
|
|
if ((wl = ap->awordlist) == NULL)
|
|
return(0);
|
|
if (*wl != NULL) {
|
|
if ((c = *(*wl)++) != 0)
|
|
return(c & 0177);
|
|
ap->awordlist++;
|
|
return(' ');
|
|
}
|
|
ap->awordlist = NULL;
|
|
return('\n');
|
|
}
|
|
|
|
/*
|
|
* Return the characters of a list of words,
|
|
* producing a space between them.
|
|
*/
|
|
static int
|
|
dolchar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
register char *wp;
|
|
|
|
if ((wp = *ap->awordlist++) != NULL) {
|
|
PUSHIO(aword, wp, *ap->awordlist == NULL? strchar: xxchar);
|
|
return(-1);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
xxchar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
register int c;
|
|
|
|
if (ap->aword == NULL)
|
|
return(0);
|
|
if ((c = *ap->aword++) == '\0') {
|
|
ap->aword = NULL;
|
|
return(' ');
|
|
}
|
|
return(c);
|
|
}
|
|
|
|
/*
|
|
* Produce the characters from a single word (string).
|
|
*/
|
|
static int
|
|
strchar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
register int c;
|
|
|
|
if (ap->aword == NULL || (c = *ap->aword++) == 0)
|
|
return(0);
|
|
return(c);
|
|
}
|
|
|
|
/*
|
|
* Produce quoted characters from a single word (string).
|
|
*/
|
|
static int
|
|
qstrchar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
register int c;
|
|
|
|
if (ap->aword == NULL || (c = *ap->aword++) == 0)
|
|
return(0);
|
|
return(c|QUOTE);
|
|
}
|
|
|
|
/*
|
|
* Return the characters from a file.
|
|
*/
|
|
static int
|
|
filechar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
register int i;
|
|
char c;
|
|
struct iobuf *bp = ap->afbuf;
|
|
|
|
if (ap->afid != AFID_NOBUF) {
|
|
if ((i = ap->afid != bp->id) || bp->bufp == bp->ebufp) {
|
|
if (i)
|
|
lseek(ap->afile, ap->afpos, 0);
|
|
i = safe_read(ap->afile, bp->buf, sizeof(bp->buf));
|
|
if (i <= 0) {
|
|
closef(ap->afile);
|
|
return 0;
|
|
}
|
|
bp->id = ap->afid;
|
|
bp->ebufp = (bp->bufp = bp->buf) + i;
|
|
}
|
|
ap->afpos++;
|
|
return *bp->bufp++ & 0177;
|
|
}
|
|
|
|
#ifdef CONFIG_FEATURE_COMMAND_EDITING
|
|
if (interactive && isatty(ap->afile)) {
|
|
static char mycommand[BUFSIZ];
|
|
static int position = 0, size = 0;
|
|
|
|
while (size == 0 || position >= size) {
|
|
cmdedit_read_input(current_prompt, mycommand);
|
|
size = strlen(mycommand);
|
|
position = 0;
|
|
}
|
|
c = mycommand[position];
|
|
position++;
|
|
return(c);
|
|
} else
|
|
#endif
|
|
{
|
|
i = safe_read(ap->afile, &c, sizeof(c));
|
|
return(i == sizeof(c)? c&0177: (closef(ap->afile), 0));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return the characters from a here temp file.
|
|
*/
|
|
static int
|
|
herechar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
char c;
|
|
|
|
|
|
if (read(ap->afile, &c, sizeof(c)) != sizeof(c)) {
|
|
close(ap->afile);
|
|
c = 0;
|
|
}
|
|
return (c);
|
|
|
|
}
|
|
|
|
/*
|
|
* Return the characters produced by a process (`...`).
|
|
* Quote them if required, and remove any trailing newline characters.
|
|
*/
|
|
static int
|
|
gravechar(ap, iop)
|
|
struct ioarg *ap;
|
|
struct io *iop;
|
|
{
|
|
register int c;
|
|
|
|
if ((c = qgravechar(ap, iop)&~QUOTE) == '\n')
|
|
c = ' ';
|
|
return(c);
|
|
}
|
|
|
|
static int
|
|
qgravechar(ap, iop)
|
|
register struct ioarg *ap;
|
|
struct io *iop;
|
|
{
|
|
register int c;
|
|
|
|
if (iop->xchar) {
|
|
if (iop->nlcount) {
|
|
iop->nlcount--;
|
|
return('\n'|QUOTE);
|
|
}
|
|
c = iop->xchar;
|
|
iop->xchar = 0;
|
|
} else if ((c = filechar(ap)) == '\n') {
|
|
iop->nlcount = 1;
|
|
while ((c = filechar(ap)) == '\n')
|
|
iop->nlcount++;
|
|
iop->xchar = c;
|
|
if (c == 0)
|
|
return(c);
|
|
iop->nlcount--;
|
|
c = '\n';
|
|
}
|
|
return(c!=0? c|QUOTE: 0);
|
|
}
|
|
|
|
/*
|
|
* Return a single command (usually the first line) from a file.
|
|
*/
|
|
static int
|
|
linechar(ap)
|
|
register struct ioarg *ap;
|
|
{
|
|
register int c;
|
|
|
|
if ((c = filechar(ap)) == '\n') {
|
|
if (!multiline) {
|
|
closef(ap->afile);
|
|
ap->afile = -1; /* illegal value */
|
|
}
|
|
}
|
|
return(c);
|
|
}
|
|
|
|
static void
|
|
prs(s)
|
|
register char *s;
|
|
{
|
|
if (*s)
|
|
write(2, s, strlen(s));
|
|
}
|
|
|
|
static void
|
|
prn(u)
|
|
unsigned u;
|
|
{
|
|
prs(itoa(u));
|
|
}
|
|
|
|
static void
|
|
closef(i)
|
|
register int i;
|
|
{
|
|
if (i > 2)
|
|
close(i);
|
|
}
|
|
|
|
static void
|
|
closeall()
|
|
{
|
|
register int u;
|
|
|
|
for (u=NUFILE; u<NOFILE;)
|
|
close(u++);
|
|
}
|
|
|
|
/*
|
|
* remap fd into Shell's fd space
|
|
*/
|
|
static int
|
|
remap(fd)
|
|
register int fd;
|
|
{
|
|
register int i;
|
|
int map[NOFILE];
|
|
|
|
if (fd < e.iofd) {
|
|
for (i=0; i<NOFILE; i++)
|
|
map[i] = 0;
|
|
do {
|
|
map[fd] = 1;
|
|
fd = dup(fd);
|
|
} while (fd >= 0 && fd < e.iofd);
|
|
for (i=0; i<NOFILE; i++)
|
|
if (map[i])
|
|
close(i);
|
|
if (fd < 0)
|
|
err("too many files open in shell");
|
|
}
|
|
return(fd);
|
|
}
|
|
|
|
static int
|
|
openpipe(pv)
|
|
register int *pv;
|
|
{
|
|
register int i;
|
|
|
|
if ((i = pipe(pv)) < 0)
|
|
err("can't create pipe - try again");
|
|
return(i);
|
|
}
|
|
|
|
static void
|
|
closepipe(pv)
|
|
register int *pv;
|
|
{
|
|
if (pv != NULL) {
|
|
close(*pv++);
|
|
close(*pv);
|
|
}
|
|
}
|
|
|
|
/* -------- here.c -------- */
|
|
|
|
/*
|
|
* here documents
|
|
*/
|
|
|
|
static void
|
|
markhere(s, iop)
|
|
register char *s;
|
|
struct ioword *iop;
|
|
{
|
|
register struct here *h, *lh;
|
|
|
|
h = (struct here *) space(sizeof(struct here));
|
|
if (h == 0)
|
|
return;
|
|
h->h_tag = evalstr(s, DOSUB);
|
|
if (h->h_tag == 0)
|
|
return;
|
|
h->h_iop = iop;
|
|
iop->io_name = 0;
|
|
h->h_next = NULL;
|
|
if (inhere == 0)
|
|
inhere = h;
|
|
else
|
|
for (lh = inhere; lh!=NULL; lh = lh->h_next)
|
|
if (lh->h_next == 0) {
|
|
lh->h_next = h;
|
|
break;
|
|
}
|
|
iop->io_flag |= IOHERE|IOXHERE;
|
|
for (s = h->h_tag; *s; s++)
|
|
if (*s & QUOTE) {
|
|
iop->io_flag &= ~ IOXHERE;
|
|
*s &= ~ QUOTE;
|
|
}
|
|
h->h_dosub = iop->io_flag & IOXHERE;
|
|
}
|
|
|
|
static void
|
|
gethere()
|
|
{
|
|
register struct here *h, *hp;
|
|
|
|
/* Scan here files first leaving inhere list in place */
|
|
for (hp = h = inhere; h != NULL; hp = h, h = h->h_next)
|
|
readhere(&h->h_iop->io_name, h->h_tag, h->h_dosub? 0: '\'');
|
|
|
|
/* Make inhere list active - keep list intact for scraphere */
|
|
if (hp != NULL) {
|
|
hp->h_next = acthere;
|
|
acthere = inhere;
|
|
inhere = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
readhere(name, s, ec)
|
|
char **name;
|
|
register char *s;
|
|
int ec;
|
|
{
|
|
int tf;
|
|
char tname[30] = ".msh_XXXXXX";
|
|
register int c;
|
|
jmp_buf ev;
|
|
char myline [LINELIM+1];
|
|
char *thenext;
|
|
|
|
tf = mkstemp(tname);
|
|
if (tf < 0)
|
|
return;
|
|
*name = strsave(tname, areanum);
|
|
if (newenv(setjmp(errpt = ev)) != 0)
|
|
unlink(tname);
|
|
else {
|
|
pushio(e.iop->argp, (int(*)(struct ioarg *))e.iop->iofn);
|
|
e.iobase = e.iop;
|
|
for (;;) {
|
|
if (interactive && e.iop <= iostack) {
|
|
#ifdef CONFIG_FEATURE_COMMAND_EDITING
|
|
current_prompt=cprompt->value;
|
|
#else
|
|
prs(cprompt->value);
|
|
#endif
|
|
}
|
|
thenext = myline;
|
|
while ((c = my_getc(ec)) != '\n' && c) {
|
|
if (ec == '\'')
|
|
c &= ~ QUOTE;
|
|
if (thenext >= &myline[LINELIM]) {
|
|
c = 0;
|
|
break;
|
|
}
|
|
*thenext++ = c;
|
|
}
|
|
*thenext = 0;
|
|
if (strcmp(s, myline) == 0 || c == 0)
|
|
break;
|
|
*thenext++ = '\n';
|
|
write (tf, myline, (int)(thenext-myline));
|
|
}
|
|
if (c == 0) {
|
|
prs("here document `"); prs(s); err("' unclosed");
|
|
}
|
|
quitenv();
|
|
}
|
|
close(tf);
|
|
}
|
|
|
|
/*
|
|
* open here temp file.
|
|
* if unquoted here, expand here temp file into second temp file.
|
|
*/
|
|
static int
|
|
herein(hname, xdoll)
|
|
char *hname;
|
|
int xdoll;
|
|
{
|
|
register int hf;
|
|
int tf;
|
|
|
|
#if __GNUC__
|
|
/* Avoid longjmp clobbering */
|
|
(void) &tf;
|
|
#endif
|
|
if (hname == 0)
|
|
return(-1);
|
|
hf = open(hname, 0);
|
|
if (hf < 0)
|
|
return (-1);
|
|
if (xdoll) {
|
|
char c;
|
|
char tname[30] = ".msh_XXXXXX";
|
|
jmp_buf ev;
|
|
|
|
tf = mkstemp(tname);
|
|
if (tf < 0)
|
|
return (-1);
|
|
if (newenv(setjmp(errpt = ev)) == 0) {
|
|
PUSHIO(afile, hf, herechar);
|
|
setbase(e.iop);
|
|
while ((c = subgetc(0, 0)) != 0) {
|
|
c &= ~ QUOTE;
|
|
write(tf, &c, sizeof c);
|
|
}
|
|
quitenv();
|
|
} else
|
|
unlink(tname);
|
|
close(tf);
|
|
tf = open(tname, 0);
|
|
unlink(tname);
|
|
return (tf);
|
|
} else
|
|
return (hf);
|
|
}
|
|
|
|
static void
|
|
scraphere()
|
|
{
|
|
register struct here *h;
|
|
|
|
for (h = inhere; h != NULL; h = h->h_next) {
|
|
if (h->h_iop && h->h_iop->io_name)
|
|
unlink(h->h_iop->io_name);
|
|
}
|
|
inhere = NULL;
|
|
}
|
|
|
|
/* unlink here temp files before a freearea(area) */
|
|
static void
|
|
freehere(area)
|
|
int area;
|
|
{
|
|
register struct here *h, *hl;
|
|
|
|
hl = NULL;
|
|
for (h = acthere; h != NULL; h = h->h_next)
|
|
if (getarea((char *) h) >= area) {
|
|
if (h->h_iop->io_name != NULL)
|
|
unlink(h->h_iop->io_name);
|
|
if (hl == NULL)
|
|
acthere = h->h_next;
|
|
else
|
|
hl->h_next = h->h_next;
|
|
} else
|
|
hl = h;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Copyright (c) 1987,1997, Prentice Hall
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use of the MINIX operating system in source and
|
|
* binary forms, with or without modification, are permitted provided
|
|
* that the following conditions are met:
|
|
*
|
|
* Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* Neither the name of Prentice Hall nor the names of the software
|
|
* authors or contributors may be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND
|
|
* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|