src/kmk/kmkbuiltin/chmod.c

   1 /*-
   2  * Copyright (c) 1989, 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 char const copyright[] =
  33 "@(#) Copyright (c) 1989, 1993, 1994\n\
  34         The Regents of the University of California.  All rights reserved.\n";
  35 #endif /* not lint */
  36
  37 #ifndef lint
  38 static char sccsid[] = "@(#)chmod.c     8.8 (Berkeley) 4/1/94";
  39 #endif /* not lint */
  40 #endif
  41 /*#include <sys/cdefs.h> */
  42 /*__FBSDID("$FreeBSD: src/bin/chmod/chmod.c,v 1.33 2005/01/10 08:39:20 imp Exp $");*/
  43
  44 #include <sys/types.h>
  45 #include <sys/stat.h>
  46
  47 #include "err.h"
  48 #include <errno.h>
  49 #include <fts.h>
  50 #include <limits.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #ifndef _MSC_VER
  55 # include <unistd.h>
  56 #else
  57 # include "mscfakes.h"
  58 #endif
  59 #include "getopt.h"
  60 #include "kmkbuiltin.h"
  61
  62 extern void * bsd_setmode(const char *p);
  63 extern mode_t bsd_getmode(const void *bbox, mode_t omode);
  64 extern void bsd_strmode(mode_t mode, char *p);
  65
  66 #if defined(__APPLE__) && !defined(_DARWIN_FEATURE_UNIX_CONFORMANCE)
  67 extern int lchmod(const char *, mode_t);
  68 #endif
  69
  70 static int usage(FILE *);
  71
  72 static struct option long_options[] =
  73 {
  74     { "help",                                           no_argument, 0, 261 },
  75     { "version",                                        no_argument, 0, 262 },
  76     { 0, 0,     0, 0 },
  77 };
  78
  79
  80 int
  81 kmk_builtin_chmod(int argc, char *argv[], char **envp)
  82 {
  83         FTS *ftsp;
  84         FTSENT *p;
  85         mode_t *set;
  86         int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
  87         int vflag;
  88         char *mode;
  89         mode_t newmode;
  90         int (*change_mode)(const char *, mode_t);
  91
  92         /* kmk: reset getopt and set progname */
  93         g_progname = argv[0];
  94         opterr = 1;
  95         optarg = NULL;
  96         optopt = 0;
  97         optind = 0; /* init */
  98
  99         set = NULL;
 100         Hflag = Lflag = Rflag = fflag = hflag = vflag = 0;
 101         while ((ch = getopt_long(argc, argv, "HLPRXfghorstuvwx", long_options, NULL)) != -1)
 102                 switch (ch) {
 103                 case 'H':
 104                         Hflag = 1;
 105                         Lflag = 0;
 106                         break;
 107                 case 'L':
 108                         Lflag = 1;
 109                         Hflag = 0;
 110                         break;
 111                 case 'P':
 112                         Hflag = Lflag = 0;
 113                         break;
 114                 case 'R':
 115                         Rflag = 1;
 116                         break;
 117                 case 'f':
 118                         fflag = 1;
 119                         break;
 120                 case 'h':
 121                         /*
 122                          * In System V (and probably POSIX.2) the -h option
 123                          * causes chmod to change the mode of the symbolic
 124                          * link.  4.4BSD's symbolic links didn't have modes,
 125                          * so it was an undocumented noop.  In FreeBSD 3.0,
 126                          * lchmod(2) is introduced and this option does real
 127                          * work.
 128                          */
 129                         hflag = 1;
 130                         break;
 131                 /*
 132                  * XXX
 133                  * "-[rwx]" are valid mode commands.  If they are the entire
 134                  * argument, getopt has moved past them, so decrement optind.
 135                  * Regardless, we're done argument processing.
 136                  */
 137                 case 'g': case 'o': case 'r': case 's':
 138                 case 't': case 'u': case 'w': case 'X': case 'x':
 139                         if (argv[optind - 1][0] == '-' &&
 140                             argv[optind - 1][1] == ch &&
 141                             argv[optind - 1][2] == '\0')
 142                                 --optind;
 143                         goto done;
 144                 case 'v':
 145                         vflag++;
 146                         break;
 147                 case 261:
 148                         usage(stdout);
 149                         return 0;
 150                 case 262:
 151                         return kbuild_version(argv[0]);
 152                 case '?':
 153                 default:
 154                         return usage(stderr);
 155                 }
 156 done:   argv += optind;
 157         argc -= optind;
 158
 159         if (argc < 2)
 160                 return usage(stderr);
 161
 162         if (Rflag) {
 163                 fts_options = FTS_PHYSICAL;
 164                 if (hflag)
 165                         return errx(1,
 166                 "the -R and -h options may not be specified together.");
 167                 if (Hflag)
 168                         fts_options |= FTS_COMFOLLOW;
 169                 if (Lflag) {
 170                         fts_options &= ~FTS_PHYSICAL;
 171                         fts_options |= FTS_LOGICAL;
 172                 }
 173         } else
 174                 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL;
 175
 176         if (hflag)
 177                 change_mode = lchmod;
 178         else
 179                 change_mode = chmod;
 180
 181         mode = *argv;
 182         if ((set = bsd_setmode(mode)) == NULL)
 183                 return errx(1, "invalid file mode: %s", mode);
 184
 185         if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
 186                 return err(1, "fts_open");
 187         for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
 188                 switch (p->fts_info) {
 189                 case FTS_D:                     /* Change it at FTS_DP. */
 190                         if (!Rflag)
 191                                 fts_set(ftsp, p, FTS_SKIP);
 192                         continue;
 193                 case FTS_DNR:                   /* Warn, chmod, continue. */
 194                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 195                         rval = 1;
 196                         break;
 197                 case FTS_ERR:                   /* Warn, continue. */
 198                 case FTS_NS:
 199                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 200                         rval = 1;
 201                         continue;
 202                 case FTS_SL:                    /* Ignore. */
 203                 case FTS_SLNONE:
 204                         /*
 205                          * The only symlinks that end up here are ones that
 206                          * don't point to anything and ones that we found
 207                          * doing a physical walk.
 208                          */
 209                         if (!hflag)
 210                                 continue;
 211                         /* else */
 212                         /* FALLTHROUGH */
 213                 default:
 214                         break;
 215                 }
 216                 newmode = bsd_getmode(set, p->fts_statp->st_mode);
 217                 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS))
 218                         continue;
 219                 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) {
 220                         warn("%s", p->fts_path);
 221                         rval = 1;
 222                 } else {
 223                         if (vflag) {
 224                                 (void)printf("%s", p->fts_path);
 225
 226                                 if (vflag > 1) {
 227                                         char m1[12], m2[12];
 228
 229                                         bsd_strmode(p->fts_statp->st_mode, m1);
 230                                         bsd_strmode((p->fts_statp->st_mode &
 231                                             S_IFMT) | newmode, m2);
 232
 233                                         (void)printf(": 0%o [%s] -> 0%o [%s]",
 234                                             p->fts_statp->st_mode, m1,
 235                                             (p->fts_statp->st_mode & S_IFMT) |
 236                                             newmode, m2);
 237                                 }
 238                                 (void)printf("\n");
 239                         }
 240
 241                 }
 242         }
 243         if (errno)
 244                 rval = err(1, "fts_read");
 245         free(set);
 246         fts_close(ftsp);
 247         return rval;
 248 }
 249
 250 int
 251 usage(FILE *out)
 252 {
 253         (void)fprintf(out,
 254             "usage: %s [-fhv] [-R [-H | -L | -P]] mode file ...\n"
 255             "   or: %s --version\n"
 256             "   or: %s --help\n",
 257             g_progname, g_progname, g_progname);
 258
 259         return 1;
 260 }