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669 lines
13 KiB
C
669 lines
13 KiB
C
/* glob.c: The csh et al glob pattern matching routines.
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%%% copyright-cmetz-96
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This software is Copyright 1996-1998 by Craig Metz, All Rights Reserved.
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The Inner Net License Version 2 applies to this software.
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You should have received a copy of the license with this software. If
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you didn't get a copy, you may request one from <license@inner.net>.
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Portions of this software are Copyright 1995 by Randall Atkinson and Dan
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McDonald, All Rights Reserved. All Rights under this copyright are assigned
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to the U.S. Naval Research Laboratory (NRL). The NRL Copyright Notice and
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License Agreement applies to this software.
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History:
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Modified by cmetz for OPIE 2.32. Remove include of dirent.h here; it's
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done already (and conditionally) in opie_cfg.h.
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Modified by cmetz for OPIE 2.2. Use FUNCTION declaration et al.
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Remove useless strings. Prototype right.
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Modified at NRL for OPIE 2.0.
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Originally from BSD.
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*/
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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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/*
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* C-shell glob for random programs.
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*/
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#include "opie_cfg.h"
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#if HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif /* HAVE_SYS_PARAM_H */
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#include <sys/stat.h>
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#if HAVE_PWD_H
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#include <pwd.h>
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#endif /* HAVE_PWD_H */
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#if HAVE_LIMITS_H
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#include <limits.h>
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#endif /* HAVE_LIMITS_H */
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#include "opie.h"
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#ifndef NCARGS
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#define NCARGS 600
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#endif /* NCARGS */
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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 letter __P((register char));
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static int digit __P((register char));
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static int any __P((int, char *));
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static int blklen __P((register char **));
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VOIDRET blkfree __P((char **));
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static char *strspl __P((register char *, register char *));
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static int tglob __P((register char c));
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extern int errno;
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static char *strend __P((char *));
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static int globcnt;
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static char *globchars = "`{[*?";
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char *globerr = NULL;
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char *home = NULL;
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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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static int amatch __P((char *p, char *s));
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static int execbrc __P((register char *p, register char *s));
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VOIDRET opiefatal __P((char *));
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char **copyblk __P((char **));
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static int match FUNCTION((s, p), char *s AND char *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 Gmatch FUNCTION((s, p), register char *s AND register char *p)
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{
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register 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 VOIDRET Gcat FUNCTION((s1, s2), register char *s1 AND register char *s2)
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{
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register int 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 VOIDRET addpath FUNCTION((c), 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 VOIDRET rscan FUNCTION((t, f), register char **t AND int (*f)__P((char)))
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{
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register 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
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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 FUNCTION((c), register 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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static int letter FUNCTION((c), register 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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static int digit FUNCTION((c), register char c)
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{
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return (c >= '0' && c <= '9');
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}
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static int any FUNCTION((c, s), int c AND 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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static int blklen FUNCTION((av), register char **av)
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{
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register int 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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static char **blkcpy FUNCTION((oav, bv), char **oav AND register char **bv)
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{
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register char **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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VOIDRET blkfree FUNCTION((av0), char **av0)
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{
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register char **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 FUNCTION((cp, dp), register char *cp AND register char *dp)
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{
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register char *ep = (char *) malloc((unsigned) (strlen(cp) +
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strlen(dp) + 1));
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if (ep == (char *) 0)
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opiefatal("Out of memory");
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strcpy(ep, cp);
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strcat(ep, dp);
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return (ep);
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}
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char **copyblk FUNCTION((v), char **v)
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{
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register char **nv = (char **) malloc((unsigned) ((blklen(v) + 1) *
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sizeof(char **)));
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if (nv == (char **) 0)
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opiefatal("Out of memory");
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return (blkcpy(nv, v));
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}
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static char *strend FUNCTION((cp), register 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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static int gethdir FUNCTION((home), char *home)
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{
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register 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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strcpy(home, pp->pw_dir);
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return (0);
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}
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static VOIDRET ginit FUNCTION((agargv), char **agargv)
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{
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agargv[0] = 0;
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gargv = agargv;
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sortbas = agargv;
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gargc = 0;
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gnleft = NCARGS - 4;
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}
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static VOIDRET sort FUNCTION_NOARGS
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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 VOIDRET matchdir FUNCTION((pattern), 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 == '\0' ? "." : 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 !defined(linux)
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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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#endif /* !defined(linux) */
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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 VOIDRET expand FUNCTION((as), 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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strcpy(gpath, gpath + 1);
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} else
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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
|
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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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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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|
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static int execbrc FUNCTION((p, s), char *p AND char *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;
|
|
|
|
case '}':
|
|
if (brclev == 0)
|
|
goto pend;
|
|
brclev--;
|
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continue;
|
|
|
|
case '[':
|
|
for (pe++; *pe && *pe != ']'; pe++)
|
|
continue;
|
|
continue;
|
|
}
|
|
pend:
|
|
brclev = 0;
|
|
for (pl = pm = p; pm <= pe; pm++)
|
|
switch (*pm & (QUOTE | TRIM)) {
|
|
|
|
case '{':
|
|
brclev++;
|
|
continue;
|
|
|
|
case '}':
|
|
if (brclev) {
|
|
brclev--;
|
|
continue;
|
|
}
|
|
goto doit;
|
|
|
|
case ',' | QUOTE:
|
|
case ',':
|
|
if (brclev)
|
|
continue;
|
|
doit:
|
|
savec = *pm;
|
|
*pm = 0;
|
|
strcpy(lm, pl);
|
|
strcat(restbuf, pe + 1);
|
|
*pm = savec;
|
|
if (s == 0) {
|
|
sgpathp = gpathp;
|
|
expand(restbuf);
|
|
gpathp = sgpathp;
|
|
*gpathp = 0;
|
|
} else
|
|
if (amatch(s, restbuf))
|
|
return (1);
|
|
sort();
|
|
pl = pm + 1;
|
|
if (brclev)
|
|
return (0);
|
|
continue;
|
|
|
|
case '[':
|
|
for (pm++; *pm && *pm != ']'; pm++)
|
|
continue;
|
|
if (!*pm)
|
|
pm--;
|
|
continue;
|
|
}
|
|
if (brclev)
|
|
goto doit;
|
|
return (0);
|
|
}
|
|
|
|
static VOIDRET acollect FUNCTION((as), register char *as)
|
|
{
|
|
register int ogargc = gargc;
|
|
|
|
gpathp = gpath;
|
|
*gpathp = 0;
|
|
globbed = 0;
|
|
expand(as);
|
|
if (gargc != ogargc)
|
|
sort();
|
|
}
|
|
|
|
static VOIDRET collect FUNCTION((as), register char *as)
|
|
{
|
|
if (eq(as, "{") || eq(as, "{}")) {
|
|
Gcat(as, "");
|
|
sort();
|
|
} else
|
|
acollect(as);
|
|
}
|
|
|
|
static int amatch FUNCTION((s, p), register char *s AND register char *p)
|
|
{
|
|
register int scc;
|
|
int ok, lc;
|
|
char *sgpathp;
|
|
struct stat stb;
|
|
int c, cc;
|
|
|
|
globbed = 1;
|
|
for (;;) {
|
|
scc = *s++ & TRIM;
|
|
switch (c = *p++) {
|
|
|
|
case '{':
|
|
return (execbrc(p - 1, s - 1));
|
|
|
|
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);
|
|
if (*p == '/') {
|
|
p++;
|
|
goto slash;
|
|
}
|
|
s--;
|
|
do {
|
|
if (amatch(s, p))
|
|
return (1);
|
|
}
|
|
while (*s++);
|
|
return (0);
|
|
|
|
case 0:
|
|
return (scc == 0);
|
|
|
|
default:
|
|
if (c != scc)
|
|
return (0);
|
|
continue;
|
|
|
|
case '?':
|
|
if (scc == 0)
|
|
return (0);
|
|
continue;
|
|
|
|
case '/':
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
char **ftpglob FUNCTION((v), register char *v)
|
|
{
|
|
char agpath[BUFSIZ];
|
|
char *agargv[GAVSIZ];
|
|
char *vv[2];
|
|
|
|
vv[0] = v;
|
|
vv[1] = 0;
|
|
gflag = 0;
|
|
rscan(vv, tglob);
|
|
if (gflag == 0) {
|
|
vv[0] = strspl(v, "");
|
|
return (copyblk(vv));
|
|
}
|
|
globerr = 0;
|
|
gpath = agpath;
|
|
gpathp = gpath;
|
|
*gpathp = 0;
|
|
lastgpathp = &gpath[sizeof agpath - 2];
|
|
ginit(agargv);
|
|
globcnt = 0;
|
|
collect(v);
|
|
if (globcnt == 0 && (gflag & 1)) {
|
|
blkfree(gargv), gargv = 0;
|
|
return (0);
|
|
} else
|
|
return (gargv = copyblk(gargv));
|
|
}
|