mirror of
https://github.com/sheumann/hush.git
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things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only had one user), clean up lots of #includes... General cleanup pass. What I've been doing for the last couple days. And it conflicts! I've removed httpd.c from this checkin due to somebody else touching that file. It builds for me. I have to catch a bus. (Now you know why I'm looking forward to Mercurial.)
366 lines
9.4 KiB
C
366 lines
9.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* getopt.c - Enhanced implementation of BSD getopt(1)
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* Copyright (c) 1997, 1998, 1999, 2000 Frodo Looijaard <frodol@dds.nl>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/*
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* Version 1.0-b4: Tue Sep 23 1997. First public release.
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* Version 1.0: Wed Nov 19 1997.
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* Bumped up the version number to 1.0
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* Fixed minor typo (CSH instead of TCSH)
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* Version 1.0.1: Tue Jun 3 1998
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* Fixed sizeof instead of strlen bug
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* Bumped up the version number to 1.0.1
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* Version 1.0.2: Thu Jun 11 1998 (not present)
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* Fixed gcc-2.8.1 warnings
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* Fixed --version/-V option (not present)
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* Version 1.0.5: Tue Jun 22 1999
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* Make -u option work (not present)
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* Version 1.0.6: Tue Jun 27 2000
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* No important changes
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* Version 1.1.0: Tue Jun 30 2000
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* Added NLS support (partly written by Arkadiusz Mi<B6>kiewicz
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* <misiek@misiek.eu.org>)
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* Ported to Busybox - Alfred M. Szmidt <ams@trillian.itslinux.org>
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* Removed --version/-V and --help/-h in
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* Removed parse_error(), using bb_error_msg() from Busybox instead
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* Replaced our_malloc with xmalloc and our_realloc with xrealloc
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*
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*/
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#include "busybox.h"
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#include <getopt.h>
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/* NON_OPT is the code that is returned when a non-option is found in '+'
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mode */
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enum {
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NON_OPT = 1,
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/* LONG_OPT is the code that is returned when a long option is found. */
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LONG_OPT = 2
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};
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/* The shells recognized. */
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typedef enum {BASH,TCSH} shell_t;
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/* Some global variables that tells us how to parse. */
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static shell_t shell=BASH; /* The shell we generate output for. */
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static int quiet_errors; /* 0 is not quiet. */
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static int quiet_output; /* 0 is not quiet. */
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static int quote=1; /* 1 is do quote. */
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static int alternative; /* 0 is getopt_long, 1 is getopt_long_only */
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/* Function prototypes */
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static const char *normalize(const char *arg);
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static int generate_output(char * argv[],int argc,const char *optstr,
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const struct option *longopts);
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static void add_long_options(char *options);
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static void add_longopt(const char *name,int has_arg);
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static void set_shell(const char *new_shell);
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/*
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* This function 'normalizes' a single argument: it puts single quotes around
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* it and escapes other special characters. If quote is false, it just
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* returns its argument.
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* Bash only needs special treatment for single quotes; tcsh also recognizes
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* exclamation marks within single quotes, and nukes whitespace.
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* This function returns a pointer to a buffer that is overwritten by
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* each call.
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*/
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const char *normalize(const char *arg)
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{
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static char *BUFFER=NULL;
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const char *argptr=arg;
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char *bufptr;
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free(BUFFER);
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if (!quote) { /* Just copy arg */
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BUFFER=xstrdup(arg);
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return BUFFER;
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}
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/* Each character in arg may take up to four characters in the result:
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For a quote we need a closing quote, a backslash, a quote and an
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opening quote! We need also the global opening and closing quote,
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and one extra character for '\0'. */
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BUFFER=xmalloc(strlen(arg)*4+3);
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bufptr=BUFFER;
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*bufptr++='\'';
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while (*argptr) {
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if (*argptr == '\'') {
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/* Quote: replace it with: '\'' */
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*bufptr++='\'';
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*bufptr++='\\';
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*bufptr++='\'';
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*bufptr++='\'';
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} else if (shell==TCSH && *argptr=='!') {
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/* Exclamation mark: replace it with: \! */
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*bufptr++='\'';
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*bufptr++='\\';
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*bufptr++='!';
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*bufptr++='\'';
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} else if (shell==TCSH && *argptr=='\n') {
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/* Newline: replace it with: \n */
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*bufptr++='\\';
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*bufptr++='n';
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} else if (shell==TCSH && isspace(*argptr)) {
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/* Non-newline whitespace: replace it with \<ws> */
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*bufptr++='\'';
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*bufptr++='\\';
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*bufptr++=*argptr;
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*bufptr++='\'';
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} else
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/* Just copy */
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*bufptr++=*argptr;
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argptr++;
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}
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*bufptr++='\'';
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*bufptr++='\0';
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return BUFFER;
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}
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/*
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* Generate the output. argv[0] is the program name (used for reporting errors).
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* argv[1..] contains the options to be parsed. argc must be the number of
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* elements in argv (ie. 1 if there are no options, only the program name),
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* optstr must contain the short options, and longopts the long options.
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* Other settings are found in global variables.
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*/
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int generate_output(char * argv[],int argc,const char *optstr,
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const struct option *longopts)
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{
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int exit_code = 0; /* We assume everything will be OK */
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int opt;
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int longindex;
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const char *charptr;
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if (quiet_errors) /* No error reporting from getopt(3) */
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opterr=0;
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optind=0; /* Reset getopt(3) */
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while ((opt = (alternative?
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getopt_long_only(argc,argv,optstr,longopts,&longindex):
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getopt_long(argc,argv,optstr,longopts,&longindex)))
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!= EOF)
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if (opt == '?' || opt == ':' )
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exit_code = 1;
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else if (!quiet_output) {
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if (opt == LONG_OPT) {
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printf(" --%s",longopts[longindex].name);
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if (longopts[longindex].has_arg)
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printf(" %s",
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normalize(optarg?optarg:""));
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} else if (opt == NON_OPT)
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printf(" %s",normalize(optarg));
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else {
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printf(" -%c",opt);
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charptr = strchr(optstr,opt);
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if (charptr != NULL && *++charptr == ':')
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printf(" %s",
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normalize(optarg?optarg:""));
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}
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}
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if (! quiet_output) {
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printf(" --");
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while (optind < argc)
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printf(" %s",normalize(argv[optind++]));
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printf("\n");
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}
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return exit_code;
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}
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static struct option *long_options;
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static int long_options_length; /* Length of array */
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static int long_options_nr; /* Nr of used elements in array */
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enum { LONG_OPTIONS_INCR = 10 };
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#define init_longopt() add_longopt(NULL,0)
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/* Register a long option. The contents of name is copied. */
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void add_longopt(const char *name,int has_arg)
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{
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if (!name) { /* init */
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free(long_options);
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long_options=NULL;
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long_options_length=0;
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long_options_nr=0;
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}
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if (long_options_nr == long_options_length) {
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long_options_length += LONG_OPTIONS_INCR;
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long_options=xrealloc(long_options,
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sizeof(struct option) *
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long_options_length);
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}
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long_options[long_options_nr].name=NULL;
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long_options[long_options_nr].has_arg=0;
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long_options[long_options_nr].flag=NULL;
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long_options[long_options_nr].val=0;
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if (long_options_nr) { /* Not for init! */
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long_options[long_options_nr-1].has_arg=has_arg;
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long_options[long_options_nr-1].flag=NULL;
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long_options[long_options_nr-1].val=LONG_OPT;
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long_options[long_options_nr-1].name=xstrdup(name);
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}
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long_options_nr++;
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}
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/*
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* Register several long options. options is a string of long options,
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* separated by commas or whitespace.
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* This nukes options!
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*/
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void add_long_options(char *options)
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{
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int arg_opt, tlen;
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char *tokptr=strtok(options,", \t\n");
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while (tokptr) {
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arg_opt=no_argument;
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tlen=strlen(tokptr);
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if (tlen > 0) {
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if (tokptr[tlen-1] == ':') {
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if (tlen > 1 && tokptr[tlen-2] == ':') {
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tokptr[tlen-2]='\0';
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tlen -= 2;
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arg_opt=optional_argument;
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} else {
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tokptr[tlen-1]='\0';
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tlen -= 1;
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arg_opt=required_argument;
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}
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if (tlen == 0)
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bb_error_msg("empty long option after -l or --long argument");
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}
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add_longopt(tokptr,arg_opt);
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}
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tokptr=strtok(NULL,", \t\n");
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}
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}
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void set_shell(const char *new_shell)
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{
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if (!strcmp(new_shell,"bash"))
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shell=BASH;
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else if (!strcmp(new_shell,"tcsh"))
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shell=TCSH;
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else if (!strcmp(new_shell,"sh"))
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shell=BASH;
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else if (!strcmp(new_shell,"csh"))
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shell=TCSH;
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else
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bb_error_msg("unknown shell after -s or --shell argument");
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}
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/* Exit codes:
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* 0) No errors, successful operation.
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* 1) getopt(3) returned an error.
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* 2) A problem with parameter parsing for getopt(1).
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* 3) Internal error, out of memory
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* 4) Returned for -T
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*/
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static const struct option longopts[]=
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{
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{"options",required_argument,NULL,'o'},
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{"longoptions",required_argument,NULL,'l'},
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{"quiet",no_argument,NULL,'q'},
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{"quiet-output",no_argument,NULL,'Q'},
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{"shell",required_argument,NULL,'s'},
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{"test",no_argument,NULL,'T'},
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{"unquoted",no_argument,NULL,'u'},
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{"alternative",no_argument,NULL,'a'},
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{"name",required_argument,NULL,'n'},
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{NULL,0,NULL,0}
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};
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/* Stop scanning as soon as a non-option argument is found! */
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static const char shortopts[]="+ao:l:n:qQs:Tu";
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int getopt_main(int argc, char *argv[])
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{
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const char *optstr = NULL;
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char *name = NULL;
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int opt;
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int compatible=0;
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init_longopt();
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if (getenv("GETOPT_COMPATIBLE"))
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compatible=1;
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if (argc == 1) {
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if (compatible) {
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/* For some reason, the original getopt gave no error
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when there were no arguments. */
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printf(" --\n");
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return 0;
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} else
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bb_error_msg_and_die("missing optstring argument");
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}
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if (argv[1][0] != '-' || compatible) {
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char *s;
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quote=0;
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s=xmalloc(strlen(argv[1])+1);
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strcpy(s,argv[1]+strspn(argv[1],"-+"));
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argv[1]=argv[0];
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return (generate_output(argv+1,argc-1,s,long_options));
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}
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while ((opt=getopt_long(argc,argv,shortopts,longopts,NULL)) != EOF)
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switch (opt) {
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case 'a':
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alternative=1;
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break;
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case 'o':
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optstr = optarg;
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break;
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case 'l':
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add_long_options(optarg);
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break;
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case 'n':
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name = optarg;
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break;
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case 'q':
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quiet_errors=1;
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break;
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case 'Q':
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quiet_output=1;
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break;
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case 's':
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set_shell(optarg);
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break;
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case 'T':
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return 4;
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case 'u':
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quote=0;
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break;
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default:
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bb_show_usage();
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}
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if (!optstr) {
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if (optind >= argc)
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bb_error_msg_and_die("missing optstring argument");
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else optstr=argv[optind++];
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}
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if (name)
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argv[optind-1]=name;
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else
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argv[optind-1]=argv[0];
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return (generate_output(argv+optind-1,argc-optind+1,optstr,long_options));
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}
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