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 <ctype.h> 53 #include <dirent.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fts.h> 57 #include <grp.h> 58 #include <pwd.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 void a_gid __P((char *)); 65 void a_uid __P((char *)); 66 void chownerr __P((char *)); 67 u_long id __P((char *, char *)); 68 void usage __P((void)); 69 70 uid_t uid; 71 gid_t gid; 72 int Rflag, ischown, fflag, hflag, vflag; 73 char *gname, *myname; 74 75 int 76 main(argc, argv) 77 int argc; 78 char *argv[]; 79 { 80 FTS *ftsp; 81 FTSENT *p; 82 int Hflag, Lflag, Pflag, ch, fts_options, hflag, rval; 83 char *cp; 84 85 myname = (cp = rindex(*argv, '/')) ? cp + 1 : *argv; 86 ischown = myname[2] == 'o'; 87 88 Hflag = Lflag = Pflag = hflag = vflag = 0; 89 while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 90 switch (ch) { 91 case 'H': 92 Hflag = 1; 93 Lflag = Pflag = 0; 94 break; 95 case 'L': 96 Lflag = 1; 97 Hflag = Pflag = 0; 98 break; 99 case 'P': 100 Pflag = 1; 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 fts_options = FTS_PHYSICAL; 126 if (Rflag) { 127 if (hflag && (Lflag || Hflag)) 128 errx(1, "the -R and -h options may not be specified together"); 129 if (Hflag) 130 fts_options |= FTS_COMFOLLOW; 131 if (Lflag) { 132 fts_options &= ~FTS_PHYSICAL; 133 fts_options |= FTS_LOGICAL; 134 } 135 } 136 137 uid = gid = -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 *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, continue. */ 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: /* Ignore. */ 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 == -1 || uid == p->fts_statp->st_uid) && 186 (gid == -1 || gid == p->fts_statp->st_gid)) 187 continue; 188 if (hflag) { 189 if (lchown(p->fts_accpath, uid, gid) && !fflag) { 190 chownerr(p->fts_path); 191 rval = 1; 192 } else { 193 if (vflag) 194 (void)printf("%s\n", p->fts_accpath); 195 } 196 } else { 197 if (chown(p->fts_accpath, uid, gid) && !fflag) { 198 chownerr(p->fts_path); 199 rval = 1; 200 } else { 201 if (vflag) 202 (void)printf("%s\n", p->fts_accpath); 203 } 204 } 205 } 206 if (errno) 207 err(1, "fts_read"); 208 exit(rval); 209 } 210 211 void 212 a_gid(s) 213 char *s; 214 { 215 struct group *gr; 216 217 if (*s == '\0') /* Argument was "uid[:.]". */ 218 return; 219 gname = s; 220 gid = ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 221 } 222 223 void 224 a_uid(s) 225 char *s; 226 { 227 struct passwd *pw; 228 229 if (*s == '\0') /* Argument was "[:.]gid". */ 230 return; 231 uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 232 } 233 234 u_long 235 id(name, type) 236 char *name, *type; 237 { 238 u_long val; 239 char *ep; 240 241 /* 242 * XXX 243 * We know that uid_t's and gid_t's are unsigned longs. 244 */ 245 errno = 0; 246 val = strtoul(name, &ep, 10); 247 if (errno) 248 err(1, "%s", name); 249 if (*ep != '\0') 250 errx(1, "%s: illegal %s name", name, type); 251 return (val); 252 } 253 254 void 255 chownerr(file) 256 char *file; 257 { 258 static int euid = -1, ngroups = -1; 259 gid_t groups[NGROUPS]; 260 261 /* Check for chown without being root. */ 262 if (errno != EPERM || 263 (uid != -1 && euid == -1 && (euid = geteuid()) != 0)) 264 err(1, "%s", file); 265 266 /* Check group membership; kernel just returns EPERM. */ 267 if (gid != -1 && ngroups == -1 && 268 euid == -1 && (euid = geteuid()) != 0) { 269 ngroups = getgroups(NGROUPS, groups); 270 while (--ngroups >= 0 && gid != groups[ngroups]); 271 if (ngroups < 0) 272 errx(1, "you are not a member of group %s", gname); 273 } 274 warn("%s", file); 275 } 276 277 void 278 usage() 279 { 280 (void)fprintf(stderr, "%s\n%s\n%s\n", 281 "usage: chown [-R [-H | -L | -P]] [-f] [-h] [-v] owner[:group] file ...", 282 " chown [-R [-H | -L | -P]] [-f] [-h] [-v] :group file ...", 283 " chgrp [-R [-H | -L | -P]] [-f] [-h] [-v] group file ..."); 284 exit(1); 285 } 286