file_cmds/chflags/chflags.c

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #if 0
  31 #ifndef lint
  32 static const char copyright[] =
  33 "@(#) Copyright (c) 1992, 1993, 1994\n\
  34         The Regents of the University of California.  All rights reserved.\n";
  35 #endif
  36
  37 #ifndef lint
  38 static char sccsid[] = "@(#)chflags.c   8.5 (Berkeley) 4/1/94";
  39 #endif
  40 #endif
  41
  42 #include <sys/cdefs.h>
  43 __FBSDID("$FreeBSD: src/bin/chflags/chflags.c,v 1.26.2.1.2.1 2009/10/25 01:10:29 kensmith Exp $");
  44
  45 #include <sys/types.h>
  46 #include <sys/stat.h>
  47
  48 #include <err.h>
  49 #include <errno.h>
  50 #include <fts.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <unistd.h>
  55
  56 static void usage(void);
  57
  58 int
  59 main(int argc, char *argv[])
  60 {
  61         FTS *ftsp;
  62         FTSENT *p;
  63         u_long clear, newflags, set;
  64         long val;
  65         int Hflag, Lflag, Rflag, fflag, hflag, vflag;
  66         int ch, fts_options, oct, rval;
  67         char *flags, *ep;
  68         int (*change_flags)(const char *, u_int);
  69
  70         Hflag = Lflag = Rflag = fflag = hflag = vflag = 0;
  71         while ((ch = getopt(argc, argv, "HLPRfhv")) != -1)
  72                 switch (ch) {
  73                 case 'H':
  74                         Hflag = 1;
  75                         Lflag = 0;
  76                         break;
  77                 case 'L':
  78                         Lflag = 1;
  79                         Hflag = 0;
  80                         break;
  81                 case 'P':
  82                         Hflag = Lflag = 0;
  83                         break;
  84                 case 'R':
  85                         Rflag = 1;
  86                         break;
  87                 case 'f':
  88                         fflag = 1;
  89                         break;
  90                 case 'h':
  91                         hflag = 1;
  92                         break;
  93                 case 'v':
  94                         vflag++;
  95                         break;
  96                 case '?':
  97                 default:
  98                         usage();
  99                 }
 100         argv += optind;
 101         argc -= optind;
 102
 103         if (argc < 2)
 104                 usage();
 105
 106         if (Rflag) {
 107                 fts_options = FTS_PHYSICAL;
 108                 if (hflag)
 109                         errx(1, "the -R and -h options "
 110                                 "may not be specified together");
 111                 if (Hflag)
 112                         fts_options |= FTS_COMFOLLOW;
 113                 if (Lflag) {
 114                         fts_options &= ~FTS_PHYSICAL;
 115                         fts_options |= FTS_LOGICAL;
 116                 }
 117         } else
 118                 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL;
 119
 120         if (hflag)
 121                 change_flags = lchflags;
 122         else
 123                 change_flags = chflags;
 124
 125         flags = *argv;
 126         if (*flags >= '0' && *flags <= '7') {
 127                 errno = 0;
 128                 val = strtol(flags, &ep, 8);
 129                 if (val < 0)
 130                         errno = ERANGE;
 131                 if (errno)
 132                         err(1, "invalid flags: %s", flags);
 133                 if (*ep)
 134                         errx(1, "invalid flags: %s", flags);
 135                 set = val;
 136                 oct = 1;
 137         } else {
 138                 if (strtofflags(&flags, &set, &clear))
 139                         errx(1, "invalid flag: %s", flags);
 140                 clear = ~clear;
 141                 oct = 0;
 142         }
 143
 144         if ((ftsp = fts_open(++argv, fts_options , 0)) == NULL)
 145                 err(1, NULL);
 146
 147         for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
 148                 switch (p->fts_info) {
 149                 case FTS_D:     /* Change it at FTS_DP if we're recursive. */
 150                         if (!Rflag)
 151                                 fts_set(ftsp, p, FTS_SKIP);
 152                         continue;
 153                 case FTS_DNR:                   /* Warn, chflag, continue. */
 154                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 155                         rval = 1;
 156                         break;
 157                 case FTS_ERR:                   /* Warn, continue. */
 158                 case FTS_NS:
 159                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 160                         rval = 1;
 161                         continue;
 162                 case FTS_SL:                    /* Ignore. */
 163                 case FTS_SLNONE:
 164                         /*
 165                          * The only symlinks that end up here are ones that
 166                          * don't point to anything and ones that we found
 167                          * doing a physical walk.
 168                          */
 169                         if (!hflag)
 170                                 continue;
 171                         /* FALLTHROUGH */
 172                 default:
 173                         break;
 174                 }
 175                 if (oct)
 176                         newflags = set;
 177                 else
 178                         newflags = (p->fts_statp->st_flags | set) & clear;
 179                 if (newflags == p->fts_statp->st_flags)
 180                         continue;
 181                 if ((*change_flags)(p->fts_accpath, (u_int)newflags) && !fflag) {
 182                         warn("%s", p->fts_path);
 183                         rval = 1;
 184                 } else if (vflag) {
 185                         (void)printf("%s", p->fts_path);
 186                         if (vflag > 1)
 187                                 (void)printf(": 0%lo -> 0%lo",
 188                                     (u_long)p->fts_statp->st_flags,
 189                                     newflags);
 190                         (void)printf("\n");
 191                 }
 192         }
 193         if (errno)
 194                 err(1, "fts_read");
 195         exit(rval);
 196 }
 197
 198 static void
 199 usage(void)
 200 {
 201         (void)fprintf(stderr,
 202             "usage: chflags [-fhv] [-R [-H | -L | -P]] flags file ...\n");
 203         exit(1);
 204 }