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 #ifndef lint 35 static const char copyright[] = 36 "@(#) 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 #endif 44 #endif /* not lint */ 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 <pwd.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 62 void a_gid(const char *); 63 void a_uid(const char *); 64 void chownerr(const char *); 65 u_long id(const char *, const char *); 66 void usage(void); 67 68 uid_t uid; 69 gid_t gid; 70 int ischown; 71 const char *gname; 72 73 int 74 main(int argc, char **argv) 75 { 76 FTS *ftsp; 77 FTSENT *p; 78 int Hflag, Lflag, Rflag, fflag, hflag, vflag; 79 int ch, fts_options, rval; 80 char *cp; 81 82 cp = strrchr(argv[0], '/'); 83 cp = (cp != NULL) ? cp + 1 : argv[0]; 84 ischown = (strcmp(cp, "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 = 1; 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\n", p->fts_path); 197 } 198 } 199 if (errno) 200 err(1, "fts_read"); 201 exit(rval); 202 } 203 204 void 205 a_gid(const char *s) 206 { 207 struct group *gr; 208 209 if (*s == '\0') /* Argument was "uid[:.]". */ 210 return; 211 gname = s; 212 gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group"); 213 } 214 215 void 216 a_uid(const char *s) 217 { 218 struct passwd *pw; 219 220 if (*s == '\0') /* Argument was "[:.]gid". */ 221 return; 222 uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); 223 } 224 225 u_long 226 id(const char *name, const char *type) 227 { 228 u_long val; 229 char *ep; 230 231 /* 232 * XXX 233 * We know that uid_t's and gid_t's are unsigned longs. 234 */ 235 errno = 0; 236 val = strtoul(name, &ep, 10); 237 if (errno) 238 err(1, "%s", name); 239 if (*ep != '\0') 240 errx(1, "%s: illegal %s name", name, type); 241 return (val); 242 } 243 244 void 245 chownerr(const char *file) 246 { 247 static uid_t euid = -1; 248 static int ngroups = -1; 249 gid_t groups[NGROUPS_MAX]; 250 251 /* Check for chown without being root. */ 252 if (errno != EPERM || (uid != (uid_t)-1 && 253 euid == (uid_t)-1 && (euid = geteuid()) != 0)) { 254 warn("%s", file); 255 return; 256 } 257 258 /* Check group membership; kernel just returns EPERM. */ 259 if (gid != (gid_t)-1 && ngroups == -1 && 260 euid == (uid_t)-1 && (euid = geteuid()) != 0) { 261 ngroups = getgroups(NGROUPS_MAX, groups); 262 while (--ngroups >= 0 && gid != groups[ngroups]); 263 if (ngroups < 0) { 264 warnx("you are not a member of group %s", gname); 265 return; 266 } 267 } 268 warn("%s", file); 269 } 270 271 void 272 usage(void) 273 { 274 275 if (ischown) 276 (void)fprintf(stderr, "%s\n%s\n", 277 "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]" 278 " file ...", 279 " chown [-fhv] [-R [-H | -L | -P]] :group file ..."); 280 else 281 (void)fprintf(stderr, "%s\n", 282 "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ..."); 283 exit(1); 284 } 285