chmod/chmod.c

   1 /*      $NetBSD: chmod.c,v 1.20 1998/07/28 05:31:22 mycroft 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 __COPYRIGHT(
  39 "@(#) Copyright (c) 1989, 1993, 1994\n\
  40         The Regents of the University of California.  All rights reserved.\n");
  41 #endif /* not lint */
  42
  43 #ifndef lint
  44 #if 0
  45 static char sccsid[] = "@(#)chmod.c     8.8 (Berkeley) 4/1/94";
  46 #else
  47 __RCSID("$NetBSD: chmod.c,v 1.20 1998/07/28 05:31:22 mycroft Exp $");
  48 #endif
  49 #endif /* not lint */
  50
  51 #include <sys/types.h>
  52 #include <sys/stat.h>
  53
  54 #include <err.h>
  55 #include <errno.h>
  56 #include <fts.h>
  57 #include <locale.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <unistd.h>
  62 #include <limits.h>
  63
  64 int main __P((int, char *[]));
  65 void usage __P((void));
  66
  67 int
  68 main(argc, argv)
  69         int argc;
  70         char *argv[];
  71 {
  72         FTS *ftsp;
  73         FTSENT *p;
  74         mode_t *set;
  75         long val;
  76         int oct, omode;
  77         int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
  78         char *ep, *mode;
  79         int (*change_mode) __P((const char *, mode_t));
  80
  81         set = NULL;     /* XXX gcc -Wuninitialized */
  82         omode = 0;      /* XXX gcc -Wuninitialized */
  83
  84         (void)setlocale(LC_ALL, "");
  85
  86         Hflag = Lflag = Rflag = fflag = hflag = 0;
  87         while ((ch = getopt(argc, argv, "HLPRXfghorstuwx")) != -1)
  88                 switch (ch) {
  89                 case 'H':
  90                         Hflag = 1;
  91                         Lflag = 0;
  92                         break;
  93                 case 'L':
  94                         Lflag = 1;
  95                         Hflag = 0;
  96                         break;
  97                 case 'P':
  98                         Hflag = Lflag = 0;
  99                         break;
 100                 case 'R':
 101                         Rflag = 1;
 102                         break;
 103                 case 'f':               /* XXX: undocumented. */
 104                         fflag = 1;
 105                         break;
 106 #ifndef __APPLE__
 107                 case 'h':
 108                         /*
 109                          * In System V (and probably POSIX.2) the -h option
 110                          * causes chmod to change the mode of the symbolic
 111                          * link.  4.4BSD's symbolic links didn't have modes,
 112                          * so it was an undocumented noop.  In NetBSD 1.3,
 113                          * lchmod(2) is introduced and this option does real
 114                          * work.
 115                          */
 116                         hflag = 1;
 117                         break;
 118 #endif
 119                 /*
 120                  * XXX
 121                  * "-[rwx]" are valid mode commands.  If they are the entire
 122                  * argument, getopt has moved past them, so decrement optind.
 123                  * Regardless, we're done argument processing.
 124                  */
 125                 case 'g': case 'o': case 'r': case 's':
 126                 case 't': case 'u': case 'w': case 'X': case 'x':
 127                         if (argv[optind - 1][0] == '-' &&
 128                             argv[optind - 1][1] == ch &&
 129                             argv[optind - 1][2] == '\0')
 130                                 --optind;
 131                         goto done;
 132                 case '?':
 133                 default:
 134                         usage();
 135                 }
 136 done:   argv += optind;
 137         argc -= optind;
 138
 139         if (argc < 2)
 140                 usage();
 141
 142         fts_options = FTS_PHYSICAL;
 143         if (Rflag) {
 144                 if (hflag)
 145                         errx(1,
 146                 "the -R and -h options may not be specified together.");
 147                 if (Hflag)
 148                         fts_options |= FTS_COMFOLLOW;
 149                 if (Lflag) {
 150                         fts_options &= ~FTS_PHYSICAL;
 151                         fts_options |= FTS_LOGICAL;
 152                 }
 153         }
 154 #ifndef __APPLE__
 155         if (hflag)
 156                 change_mode = lchmod;
 157         else
 158             change_mode = chmod;
 159 #else
 160         change_mode = chmod;
 161 #endif
 162
 163         mode = *argv;
 164         if (*mode >= '0' && *mode <= '7') {
 165                 errno = 0;
 166                 val = strtol(mode, &ep, 8);
 167                 if (val > INT_MAX || val < 0)
 168                         errno = ERANGE;
 169                 if (errno)
 170                         err(1, "invalid file mode: %s", mode);
 171                 if (*ep)
 172                         errx(1, "invalid file mode: %s", mode);
 173                 omode = val;
 174                 oct = 1;
 175         } else {
 176                 if ((set = setmode(mode)) == NULL)
 177                         errx(1, "invalid file mode: %s", mode);
 178                 oct = 0;
 179         }
 180
 181         if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
 182                 err(1, argv[0]);
 183         for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
 184                 switch (p->fts_info) {
 185                 case FTS_D:
 186                         if (!Rflag)
 187                                 (void)fts_set(ftsp, p, FTS_SKIP);
 188                         break;
 189                 case FTS_DNR:                   /* Warn, chmod, continue. */
 190                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 191                         rval = 1;
 192                         break;
 193                 case FTS_DP:                    /* Already changed at FTS_D. */
 194                         continue;
 195                 case FTS_ERR:                   /* Warn, continue. */
 196                 case FTS_NS:
 197                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 198                         rval = 1;
 199                         continue;
 200                 case FTS_SL:                    /* Ignore. */
 201                 case FTS_SLNONE:
 202                         /*
 203                          * The only symlinks that end up here are ones that
 204                          * don't point to anything and ones that we found
 205                          * doing a physical walk.
 206                          */
 207 #ifndef __APPLE__
 208                         if (!hflag)
 209                                 continue;
 210                         /* else */
 211                         /* FALLTHROUGH */
 212 #else
 213                         continue;
 214 #endif
 215                 default:
 216                         break;
 217                 }
 218                 if ((*change_mode)(p->fts_accpath, oct ? omode :
 219                     getmode(set, p->fts_statp->st_mode)) && !fflag) {
 220                         warn("%s", p->fts_path);
 221                         rval = 1;
 222                 }
 223         }
 224         if (errno)
 225                 err(1, "fts_read");
 226         exit(rval);
 227         /* NOTREACHED */
 228 }
 229
 230 void
 231 usage()
 232 {
 233 #ifndef __APPLE__
 234         (void)fprintf(stderr,
 235             "usage: chmod [-R [-H | -L | -P]] [-h] mode file ...\n");
 236 #else
 237         (void)fprintf(stderr,
 238             "usage: chmod [-R [-H | -L | -P]] mode file ...\n");
 239 #endif
 240         exit(1);
 241         /* NOTREACHED */
 242 }