bin/chmod/chmod.c

   1 /* $NetBSD: chmod.c,v 1.33 2005/10/01 20:09:18 christos Exp $ */
   2
   3 /*
   4  * Copyright (c) 1989, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT(
  35 "@(#) Copyright (c) 1989, 1993, 1994\
  36  The Regents of the University of California.  All rights reserved.");
  37 #endif /* not lint */
  38
  39 #ifndef lint
  40 #if 0
  41 static char sccsid[] = "@(#)chmod.c     8.8 (Berkeley) 4/1/94";
  42 #else
  43 __RCSID("$NetBSD: chmod.c,v 1.33 2005/10/01 20:09:18 christos Exp $");
  44 #endif
  45 #endif /* not lint */
  46
  47 #include <sys/param.h>
  48 #include <sys/stat.h>
  49 #include <sys/types.h>
  50
  51 #include <err.h>
  52 #include <errno.h>
  53 #include <fts.h>
  54 #include <limits.h>
  55 #include <locale.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 #include <unistd.h>
  60
  61 int     main(int, char *[]);
  62 void    usage(void);
  63
  64 int
  65 main(int argc, char *argv[])
  66 {
  67         FTS *ftsp;
  68         FTSENT *p;
  69         mode_t *set;
  70         int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
  71         char *mode;
  72         int (*change_mode)(const char *, mode_t);
  73
  74         setprogname(argv[0]);
  75         (void)setlocale(LC_ALL, "");
  76
  77         Hflag = Lflag = Rflag = fflag = hflag = 0;
  78         while ((ch = getopt(argc, argv, "HLPRXfghorstuwx")) != -1)
  79                 switch (ch) {
  80                 case 'H':
  81                         Hflag = 1;
  82                         Lflag = 0;
  83                         break;
  84                 case 'L':
  85                         Lflag = 1;
  86                         Hflag = 0;
  87                         break;
  88                 case 'P':
  89                         Hflag = Lflag = 0;
  90                         break;
  91                 case 'R':
  92                         Rflag = 1;
  93                         break;
  94                 case 'f':               /* XXX: undocumented. */
  95                         fflag = 1;
  96                         break;
  97                 case 'h':
  98                         /*
  99                          * In System V the -h option causes chmod to
 100                          * change the mode of the symbolic link.
 101                          * 4.4BSD's symbolic links didn't have modes,
 102                          * so it was an undocumented noop.  In NetBSD
 103                          * 1.3, lchmod(2) is introduced and this
 104                          * option does real work.
 105                          */
 106                         hflag = 1;
 107                         break;
 108                 /*
 109                  * XXX
 110                  * "-[rwx]" are valid mode commands.  If they are the entire
 111                  * argument, getopt has moved past them, so decrement optind.
 112                  * Regardless, we're done argument processing.
 113                  */
 114                 case 'g': case 'o': case 'r': case 's':
 115                 case 't': case 'u': case 'w': case 'X': case 'x':
 116                         if (argv[optind - 1][0] == '-' &&
 117                             argv[optind - 1][1] == ch &&
 118                             argv[optind - 1][2] == '\0')
 119                                 --optind;
 120                         goto done;
 121                 case '?':
 122                 default:
 123                         usage();
 124                 }
 125 done:   argv += optind;
 126         argc -= optind;
 127
 128         if (argc < 2)
 129                 usage();
 130
 131         fts_options = FTS_PHYSICAL;
 132         if (Rflag) {
 133                 if (hflag) {
 134                         errx(EXIT_FAILURE,
 135                 "the -R and -h options may not be specified together.");
 136                         /* NOTREACHED */
 137                 }
 138                 if (Hflag)
 139                         fts_options |= FTS_COMFOLLOW;
 140                 if (Lflag) {
 141                         fts_options &= ~FTS_PHYSICAL;
 142                         fts_options |= FTS_LOGICAL;
 143                 }
 144         } else if (!hflag)
 145                 fts_options |= FTS_COMFOLLOW;
 146         if (hflag)
 147                 change_mode = lchmod;
 148         else
 149                 change_mode = chmod;
 150
 151         mode = *argv;
 152         if ((set = setmode(mode)) == NULL) {
 153                 err(EXIT_FAILURE, "Cannot set file mode `%s'", mode);
 154                 /* NOTREACHED */
 155         }
 156
 157         if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) {
 158                 err(EXIT_FAILURE, "fts_open");
 159                 /* NOTREACHED */
 160         }
 161         for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
 162                 switch (p->fts_info) {
 163                 case FTS_D:
 164                         if (!Rflag)
 165                                 (void)fts_set(ftsp, p, FTS_SKIP);
 166                         break;
 167                 case FTS_DNR:                   /* Warn, chmod, continue. */
 168                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 169                         rval = 1;
 170                         break;
 171                 case FTS_DP:                    /* Already changed at FTS_D. */
 172                         continue;
 173                 case FTS_ERR:                   /* Warn, continue. */
 174                 case FTS_NS:
 175                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 176                         rval = 1;
 177                         continue;
 178                 case FTS_SL:                    /* Ignore. */
 179                 case FTS_SLNONE:
 180                         /*
 181                          * The only symlinks that end up here are ones that
 182                          * don't point to anything and ones that we found
 183                          * doing a physical walk.
 184                          */
 185                         if (!hflag)
 186                                 continue;
 187                         /* else */
 188                         /* FALLTHROUGH */
 189                 default:
 190                         break;
 191                 }
 192                 if ((*change_mode)(p->fts_accpath,
 193                     getmode(set, p->fts_statp->st_mode)) && !fflag) {
 194                         warn("%s", p->fts_path);
 195                         rval = 1;
 196                 }
 197         }
 198         if (errno) {
 199                 err(EXIT_FAILURE, "fts_read");
 200                 /* NOTREACHED */
 201         }
 202         exit(rval);
 203         /* NOTREACHED */
 204 }
 205
 206 void
 207 usage(void)
 208 {
 209         (void)fprintf(stderr,
 210             "usage: %s [-R [-H | -L | -P]] [-h] mode file ...\n",
 211             getprogname());
 212         exit(1);
 213         /* NOTREACHED */
 214 }