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 <libgen.h> 57 #include <pwd.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 void a_gid(const char *); 64 void a_uid(const char *); 65 void chownerr(const char *); 66 u_long id(const char *, const char *); 67 void usage(void); 68 69 uid_t uid; 70 gid_t gid; 71 int ischown; 72 const char *gname; 73 74 int 75 main(int argc, char **argv) 76 { 77 FTS *ftsp; 78 FTSENT *p; 79 int Hflag, Lflag, Rflag, fflag, hflag, vflag; 80 int ch, fts_options, rval; 81 char *cp; 82 83 ischown = (strcmp(basename(argv[0]), "chown") == 0); 84 85 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 86 while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 87 switch (ch) { 88 case 'H': 89 Hflag = 1; 90 Lflag = 0; 91 break; 92 case 'L': 93 Lflag = 1; 94 Hflag = 0; 95 break; 96 case 'P': 97 Hflag = Lflag = 0; 98 break; 99 case 'R': 100 Rflag = 1; 101 break; 102 case 'f': 103 fflag = 1; 104 break; 105 case 'h': 106 hflag = 1; 107 break; 108 case 'v': 109 vflag = 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; 134 135 uid = (uid_t)-1; 136 gid = (gid_t)-1; 137 if (ischown) { 138 if ((cp = strchr(*argv, ':')) != NULL) { 139 *cp++ = '\0'; 140 a_gid(cp); 141 } 142 #ifdef SUPPORT_DOT 143 else if ((cp = strchr(*argv, '.')) != NULL) { 144 warnx("separation of user and group with a period is deprecated"); 145 *cp++ = '\0'; 146 a_gid(cp); 147 } 148 #endif 149 a_uid(*argv); 150 } else 151 a_gid(*argv); 152 153 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 154 err(1, NULL); 155 156 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 157 switch (p->fts_info) { 158 case FTS_D: /* Change it at FTS_DP. */ 159 if (!Rflag) 160 fts_set(ftsp, p, FTS_SKIP); 161 continue; 162 case FTS_DNR: /* Warn, chown. */ 163 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 164 rval = 1; 165 break; 166 case FTS_ERR: /* Warn, continue. */ 167 case FTS_NS: 168 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 169 rval = 1; 170 continue; 171 case FTS_SL: 172 case FTS_SLNONE: 173 /* 174 * The only symlinks that end up here are ones that 175 * don't point to anything and ones that we found 176 * doing a physical walk. 177 */ 178 if (hflag) 179 break; 180 else 181 continue; 182 default: 183 break; 184 } 185 if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) && 186 (gid == (gid_t)-1 || gid == p->fts_statp->st_gid)) 187 continue; 188 if ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) { 189 if (!fflag) { 190 chownerr(p->fts_path); 191 rval = 1; 192 } 193 } else { 194 if (vflag) 195 printf("%s\n", p->fts_path); 196 } 197 } 198 if (errno) 199 err(1, "fts_read"); 200 exit(rval); 201 } 202 203 void 204 a_gid(const char *s) 205 { 206 struct group *gr; 207 208 if (*s == '\0') /* Argument was "uid[:.]". */ 209 return; 210 gname = s; 211 gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group"); 212 } 213 214 void 215 a_uid(const char *s) 216 { 217 struct passwd *pw; 218 219 if (*s == '\0') /* Argument was "[:.]gid". */ 220 return; 221 uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); 222 } 223 224 u_long 225 id(const char *name, const char *type) 226 { 227 u_long val; 228 char *ep; 229 230 /* 231 * XXX 232 * We know that uid_t's and gid_t's are unsigned longs. 233 */ 234 errno = 0; 235 val = strtoul(name, &ep, 10); 236 if (errno) 237 err(1, "%s", name); 238 if (*ep != '\0') 239 errx(1, "%s: illegal %s name", name, type); 240 return (val); 241 } 242 243 void 244 chownerr(const char *file) 245 { 246 static uid_t euid = -1; 247 static int ngroups = -1; 248 gid_t groups[NGROUPS_MAX]; 249 250 /* Check for chown without being root. */ 251 if (errno != EPERM || (uid != (uid_t)-1 && 252 euid == (uid_t)-1 && (euid = geteuid()) != 0)) { 253 warn("%s", file); 254 return; 255 } 256 257 /* Check group membership; kernel just returns EPERM. */ 258 if (gid != (gid_t)-1 && ngroups == -1 && 259 euid == (uid_t)-1 && (euid = geteuid()) != 0) { 260 ngroups = getgroups(NGROUPS_MAX, groups); 261 while (--ngroups >= 0 && gid != groups[ngroups]); 262 if (ngroups < 0) { 263 warnx("you are not a member of group %s", gname); 264 return; 265 } 266 } 267 warn("%s", file); 268 } 269 270 void 271 usage(void) 272 { 273 274 if (ischown) 275 (void)fprintf(stderr, "%s\n%s\n", 276 "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]" 277 " file ...", 278 " chown [-fhv] [-R [-H | -L | -P]] :group file ..."); 279 else 280 (void)fprintf(stderr, "%s\n", 281 "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ..."); 282 exit(1); 283 } 284