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 #if 0 35 #ifndef lint 36 static const char copyright[] = 37 "@(#) Copyright (c) 1988, 1993, 1994\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 static char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; 43 #endif /* not lint */ 44 #endif 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include <sys/param.h> 50 #include <sys/stat.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <fts.h> 55 #include <grp.h> 56 #include <libgen.h> 57 #include <pwd.h> 58 #include <stdint.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 void a_gid(const char *); 65 void a_uid(const char *); 66 void chownerr(const char *); 67 uid_t id(const char *, const char *); 68 void usage(void); 69 70 uid_t uid; 71 gid_t gid; 72 int ischown; 73 const char *gname; 74 75 int 76 main(int argc, char **argv) 77 { 78 FTS *ftsp; 79 FTSENT *p; 80 int Hflag, Lflag, Rflag, fflag, hflag, vflag; 81 int ch, fts_options, rval; 82 char *cp; 83 84 ischown = (strcmp(basename(argv[0]), "chown") == 0); 85 86 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 87 while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 88 switch (ch) { 89 case 'H': 90 Hflag = 1; 91 Lflag = 0; 92 break; 93 case 'L': 94 Lflag = 1; 95 Hflag = 0; 96 break; 97 case 'P': 98 Hflag = Lflag = 0; 99 break; 100 case 'R': 101 Rflag = 1; 102 break; 103 case 'f': 104 fflag = 1; 105 break; 106 case 'h': 107 hflag = 1; 108 break; 109 case 'v': 110 vflag++; 111 break; 112 case '?': 113 default: 114 usage(); 115 } 116 argv += optind; 117 argc -= optind; 118 119 if (argc < 2) 120 usage(); 121 122 if (Rflag) { 123 fts_options = FTS_PHYSICAL; 124 if (hflag && (Hflag || Lflag)) 125 errx(1, "the -R%c and -h options may not be " 126 "specified together", Hflag ? 'H' : 'L'); 127 if (Hflag) 128 fts_options |= FTS_COMFOLLOW; 129 else if (Lflag) { 130 fts_options &= ~FTS_PHYSICAL; 131 fts_options |= FTS_LOGICAL; 132 } 133 } else 134 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 135 136 uid = (uid_t)-1; 137 gid = (gid_t)-1; 138 if (ischown) { 139 if ((cp = strchr(*argv, ':')) != NULL) { 140 *cp++ = '\0'; 141 a_gid(cp); 142 } 143 #ifdef SUPPORT_DOT 144 else if ((cp = strchr(*argv, '.')) != NULL) { 145 warnx("separation of user and group with a period is deprecated"); 146 *cp++ = '\0'; 147 a_gid(cp); 148 } 149 #endif 150 a_uid(*argv); 151 } else 152 a_gid(*argv); 153 154 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 155 err(1, NULL); 156 157 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 158 switch (p->fts_info) { 159 case FTS_D: /* Change it at FTS_DP. */ 160 if (!Rflag) 161 fts_set(ftsp, p, FTS_SKIP); 162 continue; 163 case FTS_DNR: /* Warn, chown. */ 164 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 165 rval = 1; 166 break; 167 case FTS_ERR: /* Warn, continue. */ 168 case FTS_NS: 169 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 170 rval = 1; 171 continue; 172 case FTS_SL: 173 case FTS_SLNONE: 174 /* 175 * The only symlinks that end up here are ones that 176 * don't point to anything and ones that we found 177 * doing a physical walk. 178 */ 179 if (hflag) 180 break; 181 else 182 continue; 183 default: 184 break; 185 } 186 if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) && 187 (gid == (gid_t)-1 || gid == p->fts_statp->st_gid)) 188 continue; 189 if ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) { 190 if (!fflag) { 191 chownerr(p->fts_path); 192 rval = 1; 193 } 194 } else { 195 if (vflag) { 196 printf("%s", p->fts_path); 197 if (vflag > 1) { 198 if (ischown) { 199 printf(": %ju:%ju -> %ju:%ju", 200 (uintmax_t) 201 p->fts_statp->st_uid, 202 (uintmax_t) 203 p->fts_statp->st_gid, 204 (uid == (uid_t)-1) ? 205 (uintmax_t) 206 p->fts_statp->st_uid : 207 (uintmax_t)uid, 208 (gid == (gid_t)-1) ? 209 (uintmax_t) 210 p->fts_statp->st_gid : 211 (uintmax_t)gid); 212 } else { 213 printf(": %ju -> %ju", 214 (uintmax_t) 215 p->fts_statp->st_gid, 216 (gid == (gid_t)-1) ? 217 (uintmax_t) 218 p->fts_statp->st_gid : 219 (uintmax_t)gid); 220 } 221 } 222 printf("\n"); 223 } 224 } 225 } 226 if (errno) 227 err(1, "fts_read"); 228 exit(rval); 229 } 230 231 void 232 a_gid(const char *s) 233 { 234 struct group *gr; 235 236 if (*s == '\0') /* Argument was "uid[:.]". */ 237 return; 238 gname = s; 239 gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group"); 240 } 241 242 void 243 a_uid(const char *s) 244 { 245 struct passwd *pw; 246 247 if (*s == '\0') /* Argument was "[:.]gid". */ 248 return; 249 uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); 250 } 251 252 uid_t 253 id(const char *name, const char *type) 254 { 255 uid_t val; 256 char *ep; 257 258 /* 259 * XXX 260 * We know that uid_t's and gid_t's are unsigned longs. 261 */ 262 errno = 0; 263 val = strtoul(name, &ep, 10); 264 if (errno) 265 err(1, "%s", name); 266 if (*ep != '\0') 267 errx(1, "%s: illegal %s name", name, type); 268 return (val); 269 } 270 271 void 272 chownerr(const char *file) 273 { 274 static uid_t euid = -1; 275 static int ngroups = -1; 276 gid_t groups[NGROUPS_MAX]; 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 = getgroups(NGROUPS_MAX, groups); 289 while (--ngroups >= 0 && gid != groups[ngroups]); 290 if (ngroups < 0) { 291 warnx("you are not a member of group %s", gname); 292 return; 293 } 294 } 295 warn("%s", file); 296 } 297 298 void 299 usage(void) 300 { 301 302 if (ischown) 303 (void)fprintf(stderr, "%s\n%s\n", 304 "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]" 305 " file ...", 306 " chown [-fhv] [-R [-H | -L | -P]] :group file ..."); 307 else 308 (void)fprintf(stderr, "%s\n", 309 "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ..."); 310 exit(1); 311 } 312