610 lines
9.4 KiB
C
610 lines
9.4 KiB
C
#ifdef __ORCAC__
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segment "ftpmain ";
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#endif
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static char sccsid[] = "@(#)glob.c 5.9 (Berkeley) 2/25/91";
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/*
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* C-shell glob for random programs.
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <pwd.h>
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#include <errno.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 "ftp.var.h"
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#include "cmds.h"
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#include "main.h"
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#include "domacro.h"
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#include "ruserpass.h"
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#include "ftp.h"
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#include "glob.h"
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static void ginit (char **agargv);
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static void collect (char *as);
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static void acollect (char *as);
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static void sort (void);
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static void expand (char *as);
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static void matchdir (char *pattern);
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static int execbrc (char *p, char *s);
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static int match (char *s, char *p);
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static int amatch (char *s, char *p);
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static int Gmatch (char *s, char *p);
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static void Gcat (char *s1, char *s2);
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static void addpath (char c);
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static void rscan (char **t, int (*f)(char));
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static int tglob (char c);
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static char *strspl (char *cp, char *dp);
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static char *strend (char *cp);
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#define QUOTE 0200
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#define TRIM 0177
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#define eq(a,b) (strcmp(a, b)==0)
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#define GAVSIZ (NCARGS/6)
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#define isdir(d) ((d.st_mode & S_IFMT) == S_IFDIR)
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static char **gargv; /* Pointer to the (stack) arglist */
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static int gargc; /* Number args in gargv */
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static int gnleft;
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static short gflag;
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char *globerr;
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char *home;
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extern int errno;
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static int globcnt;
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char *globchars = "`{[*?";
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static char *gpath, *gpathp, *lastgpathp;
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static int globbed;
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static char *entp;
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static char **sortbas;
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char **ftpglob (char *v)
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{
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static char agpath[BUFSIZ];
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static char *agargv[GAVSIZ];
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char *vv[2];
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vv[0] = strspl(v, "");
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vv[1] = 0;
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gflag = 0;
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rscan (vv, tglob);
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if (gflag == 0)
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return (copyblk(vv));
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else
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blkfree(vv); /* free what strspl() created */
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globerr = 0;
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gpath = agpath; gpathp = gpath; *gpathp = 0;
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lastgpathp = &gpath[sizeof agpath - 2];
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ginit(agargv); globcnt = 0;
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collect(v);
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if (globcnt == 0 && (gflag&1)) {
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blkfree(gargv), gargv = 0;
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return (0);
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} else
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return (gargv = copyblk(gargv));
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}
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static void ginit (char **agargv)
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{
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agargv[0] = 0; gargv = agargv; sortbas = agargv; gargc = 0;
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gnleft = NCARGS - 4;
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}
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static void collect (char *as)
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{
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if (eq(as, "{") || eq(as, "{}")) {
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Gcat(as, "");
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sort();
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} else
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acollect(as);
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}
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static void acollect (char *as)
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{
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int ogargc;
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ogargc = gargc;
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gpathp = gpath; *gpathp = 0; globbed = 0;
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expand(as);
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if (gargc != ogargc)
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sort();
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}
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static void sort (void)
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{
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char **p1, **p2, *c;
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char **Gvp;
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Gvp = &gargv[gargc];
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p1 = sortbas;
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while (p1 < Gvp-1) {
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p2 = p1;
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while (++p2 < Gvp)
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if (strcmp(*p1, *p2) > 0)
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c = *p1, *p1 = *p2, *p2 = c;
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p1++;
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}
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sortbas = Gvp;
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}
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static void expand (char *as)
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{
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char *cs;
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char *sgpathp, *oldcs;
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static struct stat stb;
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sgpathp = gpathp;
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cs = as;
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if (*cs == '~' && gpathp == gpath) {
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addpath('~');
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for (cs++; letter(*cs) || digit(*cs) || *cs == '-';)
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addpath(*cs++);
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if (!*cs || *cs == '/') {
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if (gpathp != gpath + 1) {
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*gpathp = 0;
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if (gethdir(gpath + 1))
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globerr = "Unknown user name after ~";
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(void) strcpy(gpath, gpath + 1);
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} else
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(void) strcpy(gpath, home);
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gpathp = strend(gpath);
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}
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}
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while (!any(*cs, globchars)) {
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if (*cs == 0) {
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if (!globbed)
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Gcat(gpath, "");
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else if (stat(gpath, &stb) >= 0) {
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Gcat(gpath, "");
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globcnt++;
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}
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goto endit;
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}
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addpath(*cs++);
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}
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oldcs = cs;
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while (cs > as && *cs != '/')
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cs--, gpathp--;
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if (*cs == '/')
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cs++, gpathp++;
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*gpathp = 0;
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if (*oldcs == '{') {
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(void) execbrc(cs, ((char *)0));
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return;
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}
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matchdir(cs);
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endit:
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gpathp = sgpathp;
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*gpathp = 0;
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}
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static void matchdir (char *pattern)
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{
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static struct stat stb;
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struct dirent *dp;
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DIR *dirp;
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dirp = opendir(gpath);
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if (dirp == NULL) {
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if (globbed)
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return;
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goto patherr2;
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}
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if (fstat(dirp->dd_fd, &stb) < 0)
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goto patherr1;
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if (!isdir(stb)) {
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errno = ENOTDIR;
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goto patherr1;
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}
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while ((dp = readdir(dirp)) != NULL) {
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if (dp->d_ino == 0)
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continue;
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if (match(dp->d_name, pattern)) {
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Gcat(gpath, dp->d_name);
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globcnt++;
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}
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}
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closedir(dirp);
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return;
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patherr1:
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closedir(dirp);
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patherr2:
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globerr = "Bad directory components";
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}
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static int execbrc (char *p, char *s)
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{
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static char restbuf[BUFSIZ + 2];
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char *pe, *pm, *pl;
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int brclev = 0;
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char *lm, savec, *sgpathp;
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for (lm = restbuf; *p != '{'; *lm++ = *p++)
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continue;
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for (pe = ++p; *pe; pe++)
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switch (*pe) {
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case '{':
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brclev++;
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continue;
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case '}':
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if (brclev == 0)
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goto pend;
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brclev--;
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continue;
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case '[':
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for (pe++; *pe && *pe != ']'; pe++)
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continue;
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continue;
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}
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pend:
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brclev = 0;
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for (pl = pm = p; pm <= pe; pm++)
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switch (*pm & (QUOTE|TRIM)) {
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case '{':
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brclev++;
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continue;
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case '}':
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if (brclev) {
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brclev--;
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continue;
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}
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goto doit;
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case ','|QUOTE:
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case ',':
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if (brclev)
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continue;
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doit:
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savec = *pm;
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*pm = 0;
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(void) strcpy(lm, pl);
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(void) strcat(restbuf, pe + 1);
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*pm = savec;
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if (s == 0) {
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sgpathp = gpathp;
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expand(restbuf);
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gpathp = sgpathp;
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*gpathp = 0;
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} else if (amatch(s, restbuf))
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return (1);
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sort();
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pl = pm + 1;
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if (brclev)
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return (0);
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continue;
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case '[':
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for (pm++; *pm && *pm != ']'; pm++)
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continue;
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if (!*pm)
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pm--;
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continue;
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}
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if (brclev)
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goto doit;
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return (0);
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}
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static int match (char *s, char *p)
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{
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int c;
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char *sentp;
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char sglobbed;
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sglobbed = globbed;
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if (*s == '.' && *p != '.')
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return (0);
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sentp = entp;
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entp = s;
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c = amatch(s, p);
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entp = sentp;
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globbed = sglobbed;
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return (c);
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}
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static int amatch (char *s, char *p)
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{
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int scc;
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int ok, lc;
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char *sgpathp;
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static struct stat stb;
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int c, cc;
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globbed = 1;
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for (;;) {
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scc = *s++ & TRIM;
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switch (c = *p++) {
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case '{':
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return (execbrc(p - 1, s - 1));
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case '[':
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ok = 0;
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lc = 077777;
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while (cc = *p++) {
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if (cc == ']') {
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if (ok)
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break;
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return (0);
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}
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if (cc == '-') {
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if (lc <= scc && scc <= *p++)
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ok++;
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} else
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if (scc == (lc = cc))
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ok++;
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}
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if (cc == 0)
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if (ok)
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p--;
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else
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return 0;
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continue;
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case '*':
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if (!*p)
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return (1);
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if (*p == '/') {
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p++;
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goto slash;
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}
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s--;
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do {
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if (amatch(s, p))
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return (1);
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} while (*s++);
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return (0);
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case 0:
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return (scc == 0);
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default:
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if (c != scc)
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return (0);
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continue;
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case '?':
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if (scc == 0)
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return (0);
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continue;
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case '/':
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if (scc)
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return (0);
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slash:
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s = entp;
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sgpathp = gpathp;
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while (*s)
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addpath(*s++);
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addpath('/');
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if (stat(gpath, &stb) == 0 && isdir(stb))
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if (*p == 0) {
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Gcat(gpath, "");
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globcnt++;
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} else
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expand(p);
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gpathp = sgpathp;
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*gpathp = 0;
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return (0);
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}
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}
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}
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static int Gmatch (char *s, char *p)
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{
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int scc;
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int ok, lc;
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int c, cc;
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for (;;) {
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scc = *s++ & TRIM;
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switch (c = *p++) {
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case '[':
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ok = 0;
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lc = 077777;
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while (cc = *p++) {
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if (cc == ']') {
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if (ok)
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break;
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return (0);
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}
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if (cc == '-') {
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if (lc <= scc && scc <= *p++)
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ok++;
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} else
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if (scc == (lc = cc))
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ok++;
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}
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if (cc == 0)
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if (ok)
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p--;
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else
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return 0;
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continue;
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case '*':
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if (!*p)
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return (1);
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for (s--; *s; s++)
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if (Gmatch(s, p))
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return (1);
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return (0);
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case 0:
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return (scc == 0);
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default:
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if ((c & TRIM) != scc)
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return (0);
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continue;
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case '?':
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if (scc == 0)
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return (0);
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continue;
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}
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}
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}
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static void Gcat (char *s1, char *s2)
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{
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int len;
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len = strlen(s1) + strlen(s2) + 1;
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if (len >= gnleft || gargc >= GAVSIZ - 1)
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globerr = "Arguments too long";
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else {
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gargc++;
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gnleft -= len;
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gargv[gargc] = 0;
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gargv[gargc - 1] = strspl(s1, s2);
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}
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}
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static void addpath (char c)
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{
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if (gpathp >= lastgpathp)
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globerr = "Pathname too long";
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else {
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*gpathp++ = c;
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*gpathp = 0;
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}
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}
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static void rscan (char **t, int (*f)(char))
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{
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char *p, c;
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while (p = *t++) {
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if (f == tglob)
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if (*p == '~')
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gflag |= 2;
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else if (eq(p, "{") || eq(p, "{}"))
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continue;
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while (c = *p++)
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(*f)(c);
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}
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}
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static int tglob (char c)
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{
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if (any(c, globchars))
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gflag |= c == '{' ? 2 : 1;
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return (c);
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}
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int letter (char c)
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{
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return (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c == '_');
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}
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int digit (char c)
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{
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return (c >= '0' && c <= '9');
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}
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int any (int c, char *s)
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{
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while (*s)
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if (*s++ == c)
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return(1);
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return(0);
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}
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int blklen (char **av)
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{
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int i;
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i = 0;
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while (*av++)
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i++;
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return (i);
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}
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char **blkcpy (char **oav, char **bv)
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{
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char **av;
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av = oav;
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while (*av++ = *bv++)
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continue;
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return (oav);
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}
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void blkfree (char **av0)
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{
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char **av;
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av = av0;
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while (*av)
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free(*av++);
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}
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static char *strspl (char *cp, char *dp)
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{
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char *ep;
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ep = malloc((unsigned)(strlen(cp) + strlen(dp) + 1));
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if (ep == (char *)0)
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fatal("Out of memory");
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(void) strcpy(ep, cp);
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(void) strcat(ep, dp);
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return (ep);
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}
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char **copyblk (char **v)
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{
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char **nv;
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nv = (char **)malloc((unsigned)((blklen(v) + 1) * sizeof(char **)));
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if (nv == (char **)0)
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fatal("Out of memory");
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return (blkcpy(nv, v));
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}
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static char *strend (char *cp)
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{
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while (*cp)
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cp++;
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return (cp);
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}
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/*
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* Extract a home directory from the password file
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* The argument points to a buffer where the name of the
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* user whose home directory is sought is currently.
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* We write the home directory of the user back there.
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*/
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int gethdir (char *home)
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{
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struct passwd *pp = getpwnam(home);
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if (!pp || home + strlen(pp->pw_dir) >= lastgpathp)
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return (1);
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(void) strcpy(home, pp->pw_dir);
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return (0);
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}
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