usr.bin/chflags/chflags.c

   1 /*      $NetBSD: chflags.c,v 1.14 2006/12/14 20:57:00 he Exp $  */
   2
   3 /*
   4  * Copyright (c) 1992, 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("@(#) Copyright (c) 1992, 1993, 1994\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "from: @(#)chflags.c     8.5 (Berkeley) 4/1/94";
  41 #else
  42 __RCSID("$NetBSD: chflags.c,v 1.14 2006/12/14 20:57:00 he Exp $");
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48
  49 #include <err.h>
  50 #include <errno.h>
  51 #include <fts.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55 #include <unistd.h>
  56 #include <util.h>
  57
  58 void    usage(void);
  59
  60 int
  61 main(int argc, char *argv[])
  62 {
  63         FTS *ftsp;
  64         FTSENT *p;
  65         u_long clear, set, newflags;
  66         long val;
  67         int Hflag, Lflag, Rflag, ch, fts_options, hflag, oct, rval;
  68         char *flags, *ep;
  69         int (*change_flags)(const char *, u_long);
  70
  71         Hflag = Lflag = Rflag = hflag = 0;
  72         while ((ch = getopt(argc, argv, "HLPRh")) != -1)
  73                 switch (ch) {
  74                 case 'H':
  75                         Hflag = 1;
  76                         Lflag = 0;
  77                         break;
  78                 case 'L':
  79                         Lflag = 1;
  80                         Hflag = 0;
  81                         break;
  82                 case 'P':
  83                         Hflag = Lflag = 0;
  84                         break;
  85                 case 'R':
  86                         Rflag = 1;
  87                         break;
  88                 case 'h':
  89                         hflag = 1;
  90                         break;
  91                 case '?':
  92                 default:
  93                         usage();
  94                 }
  95         argv += optind;
  96         argc -= optind;
  97
  98         if (argc < 2)
  99                 usage();
 100
 101         fts_options = FTS_PHYSICAL;
 102         if (Rflag) {
 103                 if (Hflag)
 104                         fts_options |= FTS_COMFOLLOW;
 105                 if (Lflag) {
 106                         fts_options &= ~FTS_PHYSICAL;
 107                         fts_options |= FTS_LOGICAL;
 108                 }
 109         } else if (!hflag)
 110                 fts_options |= FTS_COMFOLLOW;
 111
 112         flags = *argv;
 113         if (*flags >= '0' && *flags <= '7') {
 114                 errno = 0;
 115                 val = strtol(flags, &ep, 8);
 116                 if (val < 0)
 117                         errno = ERANGE;
 118                 if (errno)
 119                         err(1, "invalid flags: %s", flags);
 120                 if (*ep)
 121                         errx(1, "invalid flags: %s", flags);
 122                 set = val;
 123                 oct = 1;
 124         } else {
 125                 if (string_to_flags(&flags, &set, &clear))
 126                         errx(1, "invalid flag: %s", flags);
 127                 clear = ~clear;
 128                 oct = 0;
 129         }
 130
 131         if ((ftsp = fts_open(++argv, fts_options, NULL)) == NULL)
 132                 err(1, "fts_open");
 133
 134         for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
 135                 change_flags = chflags;
 136                 switch (p->fts_info) {
 137                 case FTS_D:
 138                         if (Rflag)              /* Change it at FTS_DP. */
 139                                 continue;
 140                         fts_set(ftsp, p, FTS_SKIP);
 141                         break;
 142                 case FTS_DNR:                   /* Warn, chflag, continue. */
 143                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 144                         rval = 1;
 145                         break;
 146                 case FTS_ERR:                   /* Warn, continue. */
 147                 case FTS_NS:
 148                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 149                         rval = 1;
 150                         continue;
 151                 case FTS_SL:                    /* Ignore unless -h. */
 152                         /*
 153                          * All symlinks we found while doing a physical
 154                          * walk end up here.
 155                          */
 156                         if (!hflag)
 157                                 continue;
 158                         /*
 159                          * Note that if we follow a symlink, fts_info is
 160                          * not FTS_SL but FTS_F or whatever.  And we should
 161                          * use lchflags only for FTS_SL and should use chflags
 162                          * for others.
 163                          */
 164                         change_flags = lchflags;
 165                         break;
 166                 case FTS_SLNONE:                /* Ignore. */
 167                         /*
 168                          * The only symlinks that end up here are ones that
 169                          * don't point to anything.  Note that if we are
 170                          * doing a phisycal walk, we never reach here unless
 171                          * we asked to follow explicitly.
 172                          */
 173                         continue;
 174                 default:
 175                         break;
 176                 }
 177                 if (oct)
 178                         newflags = set;
 179                 else {
 180                         newflags = p->fts_statp->st_flags;
 181                         newflags |= set;
 182                         newflags &= clear;
 183                 }
 184                 if ((*change_flags)(p->fts_accpath, newflags)) {
 185                         warn("%s", p->fts_path);
 186                         rval = 1;
 187                 }
 188         }
 189         if (errno)
 190                 err(1, "fts_read");
 191         exit(rval);
 192 }
 193
 194 void
 195 usage(void)
 196 {
 197
 198         (void)fprintf(stderr,
 199             "usage: chflags [-R [-H | -L | -P]] [-h] flags file ...\n");
 200         exit(1);
 201 }