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 #else 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif 47 #endif /* not lint */ 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 __P((const char *)); 63 void a_uid __P((const char *)); 64 void chownerr __P((const char *)); 65 u_long id __P((const char *, const char *)); 66 void usage __P((void)); 67 68 uid_t uid; 69 gid_t gid; 70 int ischown; 71 const char *gname; 72 73 int 74 main(argc, argv) 75 int argc; 76 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 cp = strrchr(argv[0], '/'); 85 cp = (cp != NULL) ? cp + 1 : argv[0]; 86 ischown = (strcmp(cp, "chown") == 0); 87 88 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 89 while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 90 switch (ch) { 91 case 'H': 92 Hflag = 1; 93 Lflag = 0; 94 break; 95 case 'L': 96 Lflag = 1; 97 Hflag = 0; 98 break; 99 case 'P': 100 Hflag = Lflag = 0; 101 break; 102 case 'R': 103 Rflag = 1; 104 break; 105 case 'f': 106 fflag = 1; 107 break; 108 case 'h': 109 hflag = 1; 110 break; 111 case 'v': 112 vflag = 1; 113 break; 114 case '?': 115 default: 116 usage(); 117 } 118 argv += optind; 119 argc -= optind; 120 121 if (argc < 2) 122 usage(); 123 124 if (Rflag) { 125 fts_options = FTS_PHYSICAL; 126 if (hflag && (Hflag || Lflag)) 127 errx(1, "the -R%c and -h options may not be " 128 "specified together", Hflag ? 'H' : 'L'); 129 if (Hflag) 130 fts_options |= FTS_COMFOLLOW; 131 else if (Lflag) { 132 fts_options &= ~FTS_PHYSICAL; 133 fts_options |= FTS_LOGICAL; 134 } 135 } else 136 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 137 138 uid = (uid_t)-1; 139 gid = (gid_t)-1; 140 if (ischown) { 141 if ((cp = strchr(*argv, ':')) != NULL) { 142 *cp++ = '\0'; 143 a_gid(cp); 144 } 145 #ifdef SUPPORT_DOT 146 else if ((cp = strchr(*argv, '.')) != NULL) { 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\n", p->fts_path); 198 } 199 } 200 if (errno) 201 err(1, "fts_read"); 202 exit(rval); 203 } 204 205 void 206 a_gid(s) 207 const char *s; 208 { 209 struct group *gr; 210 211 if (*s == '\0') /* Argument was "uid[:.]". */ 212 return; 213 gname = s; 214 gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group"); 215 } 216 217 void 218 a_uid(s) 219 const char *s; 220 { 221 struct passwd *pw; 222 223 if (*s == '\0') /* Argument was "[:.]gid". */ 224 return; 225 uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); 226 } 227 228 u_long 229 id(name, type) 230 const char *name, *type; 231 { 232 u_long val; 233 char *ep; 234 235 /* 236 * XXX 237 * We know that uid_t's and gid_t's are unsigned longs. 238 */ 239 errno = 0; 240 val = strtoul(name, &ep, 10); 241 if (errno) 242 err(1, "%s", name); 243 if (*ep != '\0') 244 errx(1, "%s: illegal %s name", name, type); 245 return (val); 246 } 247 248 void 249 chownerr(file) 250 const char *file; 251 { 252 static uid_t euid = -1; 253 static int ngroups = -1; 254 gid_t groups[NGROUPS_MAX]; 255 256 /* Check for chown without being root. */ 257 if (errno != EPERM || 258 (uid != (uid_t)-1 && euid == (uid_t)-1 && (euid = geteuid()) != 0)) 259 err(1, "%s", file); 260 261 /* Check group membership; kernel just returns EPERM. */ 262 if (gid != (gid_t)-1 && ngroups == -1 && 263 euid == (uid_t)-1 && (euid = geteuid()) != 0) { 264 ngroups = getgroups(NGROUPS_MAX, groups); 265 while (--ngroups >= 0 && gid != groups[ngroups]); 266 if (ngroups < 0) 267 errx(1, "you are not a member of group %s", gname); 268 } 269 warn("%s", file); 270 } 271 272 void 273 usage() 274 { 275 276 if (ischown) 277 (void)fprintf(stderr, "%s\n%s\n", 278 "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]" 279 " file ...", 280 " chown [-fhv] [-R [-H | -L | -P]] :group file ..."); 281 else 282 (void)fprintf(stderr, "%s\n", 283 "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ..."); 284 exit(1); 285 } 286