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 * 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) 1988, 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[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; 39 #endif /* not lint */ 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 48 #include <err.h> 49 #include <errno.h> 50 #include <fts.h> 51 #include <grp.h> 52 #include <libgen.h> 53 #include <pwd.h> 54 #include <stdint.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 void a_gid(const char *); 61 void a_uid(const char *); 62 void chownerr(const char *); 63 uid_t id(const char *, const char *); 64 void usage(void); 65 66 uid_t uid; 67 gid_t gid; 68 int ischown; 69 const char *gname; 70 71 int 72 main(int argc, char **argv) 73 { 74 FTS *ftsp; 75 FTSENT *p; 76 int Hflag, Lflag, Rflag, fflag, hflag, vflag, xflag; 77 int ch, fts_options, rval; 78 char *cp; 79 80 ischown = (strcmp(basename(argv[0]), "chown") == 0); 81 82 Hflag = Lflag = Rflag = fflag = hflag = vflag = xflag = 0; 83 while ((ch = getopt(argc, argv, "HLPRfhvx")) != -1) 84 switch (ch) { 85 case 'H': 86 Hflag = 1; 87 Lflag = 0; 88 break; 89 case 'L': 90 Lflag = 1; 91 Hflag = 0; 92 break; 93 case 'P': 94 Hflag = Lflag = 0; 95 break; 96 case 'R': 97 Rflag = 1; 98 break; 99 case 'f': 100 fflag = 1; 101 break; 102 case 'h': 103 hflag = 1; 104 break; 105 case 'v': 106 vflag++; 107 break; 108 case 'x': 109 xflag = 1; 110 break; 111 case '?': 112 default: 113 usage(); 114 } 115 argv += optind; 116 argc -= optind; 117 118 if (argc < 2) 119 usage(); 120 121 if (Rflag) { 122 fts_options = FTS_PHYSICAL; 123 if (hflag && (Hflag || Lflag)) 124 errx(1, "the -R%c and -h options may not be " 125 "specified together", Hflag ? 'H' : 'L'); 126 if (Hflag) 127 fts_options |= FTS_COMFOLLOW; 128 else if (Lflag) { 129 fts_options &= ~FTS_PHYSICAL; 130 fts_options |= FTS_LOGICAL; 131 } 132 } else 133 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 134 if (xflag) 135 fts_options |= FTS_XDEV; 136 137 uid = (uid_t)-1; 138 gid = (gid_t)-1; 139 if (ischown) { 140 if ((cp = strchr(*argv, ':')) != NULL) { 141 *cp++ = '\0'; 142 a_gid(cp); 143 } 144 #ifdef SUPPORT_DOT 145 else if ((cp = strchr(*argv, '.')) != NULL) { 146 warnx("separation of user and group with a period is deprecated"); 147 *cp++ = '\0'; 148 a_gid(cp); 149 } 150 #endif 151 a_uid(*argv); 152 } else 153 a_gid(*argv); 154 155 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 156 err(1, NULL); 157 158 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 159 switch (p->fts_info) { 160 case FTS_D: /* Change it at FTS_DP. */ 161 if (!Rflag) 162 fts_set(ftsp, p, FTS_SKIP); 163 continue; 164 case FTS_DNR: /* Warn, chown. */ 165 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 166 rval = 1; 167 break; 168 case FTS_ERR: /* Warn, continue. */ 169 case FTS_NS: 170 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 171 rval = 1; 172 continue; 173 case FTS_SL: 174 case FTS_SLNONE: 175 /* 176 * The only symlinks that end up here are ones that 177 * don't point to anything and ones that we found 178 * doing a physical walk. 179 */ 180 if (hflag) 181 break; 182 else 183 continue; 184 default: 185 break; 186 } 187 if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) && 188 (gid == (gid_t)-1 || gid == p->fts_statp->st_gid)) 189 continue; 190 if ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) { 191 if (!fflag) { 192 chownerr(p->fts_path); 193 rval = 1; 194 } 195 } else { 196 if (vflag) { 197 printf("%s", p->fts_path); 198 if (vflag > 1) { 199 if (ischown) { 200 printf(": %ju:%ju -> %ju:%ju", 201 (uintmax_t) 202 p->fts_statp->st_uid, 203 (uintmax_t) 204 p->fts_statp->st_gid, 205 (uid == (uid_t)-1) ? 206 (uintmax_t) 207 p->fts_statp->st_uid : 208 (uintmax_t)uid, 209 (gid == (gid_t)-1) ? 210 (uintmax_t) 211 p->fts_statp->st_gid : 212 (uintmax_t)gid); 213 } else { 214 printf(": %ju -> %ju", 215 (uintmax_t) 216 p->fts_statp->st_gid, 217 (gid == (gid_t)-1) ? 218 (uintmax_t) 219 p->fts_statp->st_gid : 220 (uintmax_t)gid); 221 } 222 } 223 printf("\n"); 224 } 225 } 226 } 227 if (errno) 228 err(1, "fts_read"); 229 exit(rval); 230 } 231 232 void 233 a_gid(const char *s) 234 { 235 struct group *gr; 236 237 if (*s == '\0') /* Argument was "uid[:.]". */ 238 return; 239 gname = s; 240 gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group"); 241 } 242 243 void 244 a_uid(const char *s) 245 { 246 struct passwd *pw; 247 248 if (*s == '\0') /* Argument was "[:.]gid". */ 249 return; 250 uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); 251 } 252 253 uid_t 254 id(const char *name, const char *type) 255 { 256 uid_t val; 257 char *ep; 258 259 /* 260 * XXX 261 * We know that uid_t's and gid_t's are unsigned longs. 262 */ 263 errno = 0; 264 val = strtoul(name, &ep, 10); 265 if (errno || *ep != '\0') 266 errx(1, "%s: illegal %s name", name, type); 267 return (val); 268 } 269 270 void 271 chownerr(const char *file) 272 { 273 static uid_t euid = -1; 274 static int ngroups = -1; 275 static long ngroups_max; 276 gid_t *groups; 277 278 /* Check for chown without being root. */ 279 if (errno != EPERM || (uid != (uid_t)-1 && 280 euid == (uid_t)-1 && (euid = geteuid()) != 0)) { 281 warn("%s", file); 282 return; 283 } 284 285 /* Check group membership; kernel just returns EPERM. */ 286 if (gid != (gid_t)-1 && ngroups == -1 && 287 euid == (uid_t)-1 && (euid = geteuid()) != 0) { 288 ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1; 289 if ((groups = malloc(sizeof(gid_t) * ngroups_max)) == NULL) 290 err(1, "malloc"); 291 ngroups = getgroups(ngroups_max, groups); 292 while (--ngroups >= 0 && gid != groups[ngroups]); 293 free(groups); 294 if (ngroups < 0) { 295 warnx("you are not a member of group %s", gname); 296 return; 297 } 298 } 299 warn("%s", file); 300 } 301 302 void 303 usage(void) 304 { 305 306 if (ischown) 307 (void)fprintf(stderr, "%s\n%s\n", 308 "usage: chown [-fhvx] [-R [-H | -L | -P]] owner[:group]" 309 " file ...", 310 " chown [-fhvx] [-R [-H | -L | -P]] :group file ..."); 311 else 312 (void)fprintf(stderr, "%s\n", 313 "usage: chgrp [-fhvx] [-R [-H | -L | -P]] group file ..."); 314 exit(1); 315 } 316