681 lines
11 KiB
C
681 lines
11 KiB
C
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/*
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* Copyright (c) 1980 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)glob.c 5.9 (Berkeley) 2/25/91";
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#endif /* not lint */
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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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#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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static int tglob();
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char **ftpglob();
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char *globerr;
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char *home;
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extern int errno;
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static char *strspl(), *strend();
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char **copyblk();
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static void acollect(), addpath(), collect(), expand(), Gcat();
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static void ginit(), matchdir(), rscan(), sort();
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static int amatch(), execbrc(), match();
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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 **
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ftpglob(v)
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register char *v;
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{
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char agpath[BUFSIZ];
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char *agargv[GAVSIZ];
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char *vv[2];
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vv[0] = 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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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
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ginit(agargv)
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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
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collect(as)
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register 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
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acollect(as)
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register char *as;
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{
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register int 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
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sort()
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{
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register char **p1, **p2, *c;
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char **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
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expand(as)
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char *as;
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{
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register char *cs;
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register char *sgpathp, *oldcs;
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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
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matchdir(pattern)
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char *pattern;
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{
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struct stat stb;
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register 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
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execbrc(p, s)
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char *p, *s;
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{
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char restbuf[BUFSIZ + 2];
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register 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
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match(s, p)
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char *s, *p;
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{
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register int c;
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register char *sentp;
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char 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
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amatch(s, p)
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register char *s, *p;
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{
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register int scc;
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int ok, lc;
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char *sgpathp;
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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)
|
||
|
|
return (0);
|
||
|
|
slash:
|
||
|
|
s = entp;
|
||
|
|
sgpathp = gpathp;
|
||
|
|
while (*s)
|
||
|
|
addpath(*s++);
|
||
|
|
addpath('/');
|
||
|
|
if (stat(gpath, &stb) == 0 && isdir(stb))
|
||
|
|
if (*p == 0) {
|
||
|
|
Gcat(gpath, "");
|
||
|
|
globcnt++;
|
||
|
|
} else
|
||
|
|
expand(p);
|
||
|
|
gpathp = sgpathp;
|
||
|
|
*gpathp = 0;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static
|
||
|
|
Gmatch(s, p)
|
||
|
|
register char *s, *p;
|
||
|
|
{
|
||
|
|
register int scc;
|
||
|
|
int ok, lc;
|
||
|
|
int c, cc;
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
scc = *s++ & TRIM;
|
||
|
|
switch (c = *p++) {
|
||
|
|
|
||
|
|
case '[':
|
||
|
|
ok = 0;
|
||
|
|
lc = 077777;
|
||
|
|
while (cc = *p++) {
|
||
|
|
if (cc == ']') {
|
||
|
|
if (ok)
|
||
|
|
break;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
if (cc == '-') {
|
||
|
|
if (lc <= scc && scc <= *p++)
|
||
|
|
ok++;
|
||
|
|
} else
|
||
|
|
if (scc == (lc = cc))
|
||
|
|
ok++;
|
||
|
|
}
|
||
|
|
if (cc == 0)
|
||
|
|
if (ok)
|
||
|
|
p--;
|
||
|
|
else
|
||
|
|
return 0;
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case '*':
|
||
|
|
if (!*p)
|
||
|
|
return (1);
|
||
|
|
for (s--; *s; s++)
|
||
|
|
if (Gmatch(s, p))
|
||
|
|
return (1);
|
||
|
|
return (0);
|
||
|
|
|
||
|
|
case 0:
|
||
|
|
return (scc == 0);
|
||
|
|
|
||
|
|
default:
|
||
|
|
if ((c & TRIM) != scc)
|
||
|
|
return (0);
|
||
|
|
continue;
|
||
|
|
|
||
|
|
case '?':
|
||
|
|
if (scc == 0)
|
||
|
|
return (0);
|
||
|
|
continue;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
Gcat(s1, s2)
|
||
|
|
register char *s1, *s2;
|
||
|
|
{
|
||
|
|
register int len = strlen(s1) + strlen(s2) + 1;
|
||
|
|
|
||
|
|
if (len >= gnleft || gargc >= GAVSIZ - 1)
|
||
|
|
globerr = "Arguments too long";
|
||
|
|
else {
|
||
|
|
gargc++;
|
||
|
|
gnleft -= len;
|
||
|
|
gargv[gargc] = 0;
|
||
|
|
gargv[gargc - 1] = strspl(s1, s2);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
addpath(c)
|
||
|
|
char c;
|
||
|
|
{
|
||
|
|
|
||
|
|
if (gpathp >= lastgpathp)
|
||
|
|
globerr = "Pathname too long";
|
||
|
|
else {
|
||
|
|
*gpathp++ = c;
|
||
|
|
*gpathp = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
rscan(t, f)
|
||
|
|
register char **t;
|
||
|
|
int (*f)();
|
||
|
|
{
|
||
|
|
register char *p, c;
|
||
|
|
|
||
|
|
while (p = *t++) {
|
||
|
|
if (f == tglob)
|
||
|
|
if (*p == '~')
|
||
|
|
gflag |= 2;
|
||
|
|
else if (eq(p, "{") || eq(p, "{}"))
|
||
|
|
continue;
|
||
|
|
while (c = *p++)
|
||
|
|
(*f)(c);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
static
|
||
|
|
scan(t, f)
|
||
|
|
register char **t;
|
||
|
|
int (*f)();
|
||
|
|
{
|
||
|
|
register char *p, c;
|
||
|
|
|
||
|
|
while (p = *t++)
|
||
|
|
while (c = *p)
|
||
|
|
*p++ = (*f)(c);
|
||
|
|
} */
|
||
|
|
|
||
|
|
static
|
||
|
|
tglob(c)
|
||
|
|
register char c;
|
||
|
|
{
|
||
|
|
|
||
|
|
if (any(c, globchars))
|
||
|
|
gflag |= c == '{' ? 2 : 1;
|
||
|
|
return (c);
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
static
|
||
|
|
trim(c)
|
||
|
|
char c;
|
||
|
|
{
|
||
|
|
|
||
|
|
return (c & TRIM);
|
||
|
|
} */
|
||
|
|
|
||
|
|
|
||
|
|
letter(c)
|
||
|
|
register char c;
|
||
|
|
{
|
||
|
|
|
||
|
|
return (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c == '_');
|
||
|
|
}
|
||
|
|
|
||
|
|
digit(c)
|
||
|
|
register char c;
|
||
|
|
{
|
||
|
|
|
||
|
|
return (c >= '0' && c <= '9');
|
||
|
|
}
|
||
|
|
|
||
|
|
any(c, s)
|
||
|
|
register int c;
|
||
|
|
register char *s;
|
||
|
|
{
|
||
|
|
|
||
|
|
while (*s)
|
||
|
|
if (*s++ == c)
|
||
|
|
return(1);
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
blklen(av)
|
||
|
|
register char **av;
|
||
|
|
{
|
||
|
|
register int i = 0;
|
||
|
|
|
||
|
|
while (*av++)
|
||
|
|
i++;
|
||
|
|
return (i);
|
||
|
|
}
|
||
|
|
|
||
|
|
char **
|
||
|
|
blkcpy(oav, bv)
|
||
|
|
char **oav;
|
||
|
|
register char **bv;
|
||
|
|
{
|
||
|
|
register char **av = oav;
|
||
|
|
|
||
|
|
while (*av++ = *bv++)
|
||
|
|
continue;
|
||
|
|
return (oav);
|
||
|
|
}
|
||
|
|
|
||
|
|
blkfree(av0)
|
||
|
|
char **av0;
|
||
|
|
{
|
||
|
|
register char **av = av0;
|
||
|
|
|
||
|
|
while (*av)
|
||
|
|
free(*av++);
|
||
|
|
}
|
||
|
|
|
||
|
|
static
|
||
|
|
char *
|
||
|
|
strspl(cp, dp)
|
||
|
|
register char *cp, *dp;
|
||
|
|
{
|
||
|
|
register char *ep = malloc((unsigned)(strlen(cp) + strlen(dp) + 1));
|
||
|
|
|
||
|
|
if (ep == (char *)0)
|
||
|
|
fatal("Out of memory");
|
||
|
|
(void) strcpy(ep, cp);
|
||
|
|
(void) strcat(ep, dp);
|
||
|
|
return (ep);
|
||
|
|
}
|
||
|
|
|
||
|
|
char **
|
||
|
|
copyblk(v)
|
||
|
|
register char **v;
|
||
|
|
{
|
||
|
|
register char **nv = (char **)malloc((unsigned)((blklen(v) + 1) *
|
||
|
|
sizeof(char **)));
|
||
|
|
if (nv == (char **)0)
|
||
|
|
fatal("Out of memory");
|
||
|
|
|
||
|
|
return (blkcpy(nv, v));
|
||
|
|
}
|
||
|
|
|
||
|
|
static
|
||
|
|
char *
|
||
|
|
strend(cp)
|
||
|
|
register char *cp;
|
||
|
|
{
|
||
|
|
|
||
|
|
while (*cp)
|
||
|
|
cp++;
|
||
|
|
return (cp);
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
* Extract a home directory from the password file
|
||
|
|
* The argument points to a buffer where the name of the
|
||
|
|
* user whose home directory is sought is currently.
|
||
|
|
* We write the home directory of the user back there.
|
||
|
|
*/
|
||
|
|
gethdir(home)
|
||
|
|
char *home;
|
||
|
|
{
|
||
|
|
register struct passwd *pp = getpwnam(home);
|
||
|
|
|
||
|
|
if (!pp || home + strlen(pp->pw_dir) >= lastgpathp)
|
||
|
|
return (1);
|
||
|
|
(void) strcpy(home, pp->pw_dir);
|
||
|
|
return (0);
|
||
|
|
}
|