chown/chown.c

   1 /*
   2  * Copyright (c) 1988, 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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #ifndef lint
  36 __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\
  37         The Regents of the University of California.  All rights reserved.\n");
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)chown.c     8.8 (Berkeley) 4/4/94";
  43 #else
  44 __RCSID("$NetBSD: chown.c,v 1.15 1998/10/05 21:37:39 kim Exp $");
  45 #endif
  46 #endif /* not lint */
  47
  48 #include <sys/param.h>
  49 #include <sys/stat.h>
  50
  51 #include <ctype.h>
  52 #include <dirent.h>
  53 #include <err.h>
  54 #include <errno.h>
  55 #include <locale.h>
  56 #include <fts.h>
  57 #include <grp.h>
  58 #include <pwd.h>
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <unistd.h>
  63
  64 void    a_gid __P((char *));
  65 void    a_uid __P((char *));
  66 void    chownerr __P((char *));
  67 u_long  id __P((char *, char *));
  68 int     main __P((int, char **));
  69 void    usage __P((void));
  70
  71 uid_t uid;
  72 gid_t gid;
  73 int Rflag, ischown, fflag;
  74 char *gname, *myname;
  75
  76 int
  77 main(argc, argv)
  78         int argc;
  79         char *argv[];
  80 {
  81         FTS *ftsp;
  82         FTSENT *p;
  83         int Hflag, Lflag, Pflag, ch, fts_options, hflag, rval;
  84         char *cp;
  85         int (*change_owner) __P((const char *, uid_t, gid_t));
  86
  87         setlocale(LC_ALL, "");
  88
  89         myname = (cp = strrchr(*argv, '/')) ? cp + 1 : *argv;
  90         ischown = myname[2] == 'o';
  91
  92         Hflag = Lflag = Pflag = hflag = 0;
  93         while ((ch = getopt(argc, argv, "HLPRfh")) != -1)
  94                 switch (ch) {
  95                 case 'H':
  96                         Hflag = 1;
  97                         Lflag = Pflag = 0;
  98                         break;
  99                 case 'L':
 100                         Lflag = 1;
 101                         Hflag = Pflag = 0;
 102                         break;
 103                 case 'P':
 104                         Pflag = 1;
 105                         Hflag = Lflag = 0;
 106                         break;
 107                 case 'R':
 108                         Rflag = 1;
 109                         break;
 110                 case 'f':
 111                         fflag = 1;
 112                         break;
 113                 case 'h':
 114                         /*
 115                          * In System V the -h option causes chown/chgrp to
 116                          * change the owner/group of the symbolic link.
 117                          * 4.4BSD's symbolic links didn't have owners/groups,
 118                          * so it was an undocumented noop.
 119                          * In NetBSD 1.3, lchown(2) is introduced.
 120                          */
 121                         hflag = 1;
 122                         break;
 123                 case '?':
 124                 default:
 125                         usage();
 126                 }
 127         argv += optind;
 128         argc -= optind;
 129
 130         if (argc < 2)
 131                 usage();
 132
 133         fts_options = FTS_PHYSICAL;
 134         if (Rflag) {
 135                 if (Hflag)
 136                         fts_options |= FTS_COMFOLLOW;
 137                 if (Lflag) {
 138                         if (hflag)
 139                                 errx(1, "the -L and -h options may not be specified together.");
 140                         fts_options &= ~FTS_PHYSICAL;
 141                         fts_options |= FTS_LOGICAL;
 142                 }
 143         }
 144 #ifndef __APPLE__
 145         if (hflag)
 146                 change_owner = lchown;
 147         else
 148             change_owner = chown;
 149 #else
 150         change_owner = chown;
 151 #endif
 152
 153         uid = gid = -1;
 154         if (ischown) {
 155                 if ((cp = strchr(*argv, ':')) != NULL) {
 156                         *cp++ = '\0';
 157                         a_gid(cp);
 158                 }
 159 #ifdef SUPPORT_DOT
 160                 else if ((cp = strchr(*argv, '.')) != NULL) {
 161                         *cp++ = '\0';
 162                         a_gid(cp);
 163                 }
 164 #endif
 165                 a_uid(*argv);
 166         } else
 167                 a_gid(*argv);
 168
 169         if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
 170                 err(1, "%s", "");
 171
 172         for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
 173                 switch (p->fts_info) {
 174                 case FTS_D:
 175                         if (!Rflag)             /* Change it at FTS_DP. */
 176                                 fts_set(ftsp, p, FTS_SKIP);
 177                         continue;
 178                 case FTS_DNR:                   /* Warn, chown, continue. */
 179                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 180                         rval = 1;
 181                         break;
 182                 case FTS_ERR:                   /* Warn, continue. */
 183                 case FTS_NS:
 184                         warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 185                         rval = 1;
 186                         continue;
 187                 case FTS_SL:                    /* Ignore. */
 188                 case FTS_SLNONE:
 189                         /*
 190                          * The only symlinks that end up here are ones that
 191                          * don't point to anything and ones that we found
 192                          * doing a physical walk.
 193                          */
 194 #ifndef __APPLE__
 195                     if (!hflag)
 196                         continue;
 197 #else
 198                     continue;
 199 #endif
 200                         /* else */
 201                         /* FALLTHROUGH */
 202                 default:
 203                         break;
 204                 }
 205
 206                 if ((*change_owner)(p->fts_accpath, uid, gid) && !fflag) {
 207                         warn("%s", p->fts_path);
 208                         rval = 1;
 209                 }
 210         }
 211         if (errno)
 212                 err(1, "fts_read");
 213         exit(rval);
 214 }
 215
 216 void
 217 a_gid(s)
 218         char *s;
 219 {
 220         struct group *gr;
 221
 222         if (*s == '\0')                 /* Argument was "uid[:.]". */
 223                 return;
 224         gname = s;
 225         gid = ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid;
 226 }
 227
 228 void
 229 a_uid(s)
 230         char *s;
 231 {
 232         struct passwd *pw;
 233
 234         if (*s == '\0')                 /* Argument was "[:.]gid". */
 235                 return;
 236         uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid;
 237 }
 238
 239 u_long
 240 id(name, type)
 241         char *name, *type;
 242 {
 243         u_long val;
 244         char *ep;
 245
 246         /*
 247          * XXX
 248          * We know that uid_t's and gid_t's are unsigned longs.
 249          */
 250         errno = 0;
 251         val = strtoul(name, &ep, 10);
 252         if (errno)
 253                 err(1, "%s", name);
 254         if (*ep != '\0')
 255                 errx(1, "%s: invalid %s name", name, type);
 256         return (val);
 257 }
 258
 259 void
 260 usage()
 261 {
 262         (void)fprintf(stderr,
 263             "usage: %s [-R [-H | -L | -P]] [-fh] %s file ...\n",
 264             myname, ischown ? "[owner][:group]" : "group");
 265         exit(1);
 266 }