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 int main __P((int argc, char *argv[])); 68 69 uid_t uid; 70 gid_t gid; 71 int ischown; 72 const char *gname; 73 74 int 75 main(argc, argv) 76 int argc; 77 char *argv[]; 78 { 79 FTS *ftsp; 80 FTSENT *p; 81 int Hflag, Lflag, Rflag, fflag, hflag, vflag; 82 int ch, fts_options, rval; 83 char *cp; 84 85 cp = strrchr(argv[0], '/'); 86 cp = (cp != NULL) ? cp + 1 : argv[0]; 87 ischown = (strcmp(cp, "chown") == 0); 88 89 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 90 while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 91 switch (ch) { 92 case 'H': 93 Hflag = 1; 94 Lflag = 0; 95 break; 96 case 'L': 97 Lflag = 1; 98 Hflag = 0; 99 break; 100 case 'P': 101 Hflag = Lflag = 0; 102 break; 103 case 'R': 104 Rflag = 1; 105 break; 106 case 'f': 107 fflag = 1; 108 break; 109 case 'h': 110 hflag = 1; 111 break; 112 case 'v': 113 vflag = 1; 114 break; 115 case '?': 116 default: 117 usage(); 118 } 119 argv += optind; 120 argc -= optind; 121 122 if (argc < 2) 123 usage(); 124 125 if (Rflag) { 126 fts_options = FTS_PHYSICAL; 127 if (hflag && (Hflag || Lflag)) 128 errx(1, "the -R%c and -h options may not be " 129 "specified together", Hflag ? 'H' : 'L'); 130 if (Hflag) 131 fts_options |= FTS_COMFOLLOW; 132 else if (Lflag) { 133 fts_options &= ~FTS_PHYSICAL; 134 fts_options |= FTS_LOGICAL; 135 } 136 } else 137 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 138 139 uid = (uid_t)-1; 140 gid = (gid_t)-1; 141 if (ischown) { 142 if ((cp = strchr(*argv, ':')) != NULL) { 143 *cp++ = '\0'; 144 a_gid(cp); 145 } 146 #ifdef SUPPORT_DOT 147 else if ((cp = strchr(*argv, '.')) != NULL) { 148 *cp++ = '\0'; 149 a_gid(cp); 150 } 151 #endif 152 a_uid(*argv); 153 } else 154 a_gid(*argv); 155 156 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 157 err(1, NULL); 158 159 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 160 switch (p->fts_info) { 161 case FTS_D: /* Change it at FTS_DP. */ 162 if (!Rflag) 163 fts_set(ftsp, p, FTS_SKIP); 164 continue; 165 case FTS_DNR: /* Warn, chown. */ 166 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 167 rval = 1; 168 break; 169 case FTS_ERR: /* Warn, continue. */ 170 case FTS_NS: 171 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 172 rval = 1; 173 continue; 174 case FTS_SL: 175 case FTS_SLNONE: 176 /* 177 * The only symlinks that end up here are ones that 178 * don't point to anything and ones that we found 179 * doing a physical walk. 180 */ 181 if (hflag) 182 break; 183 else 184 continue; 185 default: 186 break; 187 } 188 if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) && 189 (gid == (gid_t)-1 || gid == p->fts_statp->st_gid)) 190 continue; 191 if ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) { 192 if (!fflag) { 193 chownerr(p->fts_path); 194 rval = 1; 195 } 196 } else { 197 if (vflag) 198 printf("%s\n", p->fts_path); 199 } 200 } 201 if (errno) 202 err(1, "fts_read"); 203 exit(rval); 204 } 205 206 void 207 a_gid(s) 208 const char *s; 209 { 210 struct group *gr; 211 212 if (*s == '\0') /* Argument was "uid[:.]". */ 213 return; 214 gname = s; 215 gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group"); 216 } 217 218 void 219 a_uid(s) 220 const char *s; 221 { 222 struct passwd *pw; 223 224 if (*s == '\0') /* Argument was "[:.]gid". */ 225 return; 226 uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); 227 } 228 229 u_long 230 id(name, type) 231 const char *name, *type; 232 { 233 u_long val; 234 char *ep; 235 236 /* 237 * XXX 238 * We know that uid_t's and gid_t's are unsigned longs. 239 */ 240 errno = 0; 241 val = strtoul(name, &ep, 10); 242 if (errno) 243 err(1, "%s", name); 244 if (*ep != '\0') 245 errx(1, "%s: illegal %s name", name, type); 246 return (val); 247 } 248 249 void 250 chownerr(file) 251 const char *file; 252 { 253 static uid_t euid = -1; 254 static int ngroups = -1; 255 gid_t groups[NGROUPS_MAX]; 256 257 /* Check for chown without being root. */ 258 if (errno != EPERM || 259 (uid != (uid_t)-1 && euid == (uid_t)-1 && (euid = geteuid()) != 0)) 260 err(1, "%s", file); 261 262 /* Check group membership; kernel just returns EPERM. */ 263 if (gid != (gid_t)-1 && ngroups == -1 && 264 euid == (uid_t)-1 && (euid = geteuid()) != 0) { 265 ngroups = getgroups(NGROUPS_MAX, groups); 266 while (--ngroups >= 0 && gid != groups[ngroups]); 267 if (ngroups < 0) 268 errx(1, "you are not a member of group %s", gname); 269 } 270 warn("%s", file); 271 } 272 273 void 274 usage() 275 { 276 277 if (ischown) 278 (void)fprintf(stderr, "%s\n%s\n", 279 "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]" 280 " file ...", 281 " chown [-fhv] [-R [-H | -L | -P]] :group file ..."); 282 else 283 (void)fprintf(stderr, "%s\n", 284 "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ..."); 285 exit(1); 286 } 287