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 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 static char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/stat.h> 46 47 #include <ctype.h> 48 #include <dirent.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <fts.h> 52 #include <grp.h> 53 #include <pwd.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 void a_gid __P((char *)); 60 void a_uid __P((char *)); 61 void chownerr __P((char *)); 62 u_long id __P((char *, char *)); 63 void usage __P((void)); 64 65 uid_t uid; 66 gid_t gid; 67 int Rflag, ischown, fflag; 68 char *gname, *myname; 69 70 int 71 main(argc, argv) 72 int argc; 73 char *argv[]; 74 { 75 FTS *ftsp; 76 FTSENT *p; 77 int Hflag, Lflag, Pflag, ch, fts_options, hflag, rval; 78 char *cp; 79 80 myname = (cp = rindex(*argv, '/')) ? cp + 1 : *argv; 81 ischown = myname[2] == 'o'; 82 83 Hflag = Lflag = Pflag = hflag = 0; 84 while ((ch = getopt(argc, argv, "HLPRfh")) != EOF) 85 switch (ch) { 86 case 'H': 87 Hflag = 1; 88 Lflag = Pflag = 0; 89 break; 90 case 'L': 91 Lflag = 1; 92 Hflag = Pflag = 0; 93 break; 94 case 'P': 95 Pflag = 1; 96 Hflag = Lflag = 0; 97 break; 98 case 'R': 99 Rflag = 1; 100 break; 101 case 'f': 102 fflag = 1; 103 break; 104 case 'h': 105 /* 106 * In System V (and probably POSIX.2) the -h option 107 * causes chown/chgrp to change the owner/group of 108 * the symbolic link. 4.4BSD's symbolic links don't 109 * have owners/groups, so it's an undocumented noop. 110 * Do syntax checking, though. 111 */ 112 hflag = 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 fts_options = FTS_PHYSICAL; 125 if (Rflag) { 126 if (hflag) 127 errx(1, 128 "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 #ifdef SUPPORT_DOT 140 if ((cp = strchr(*argv, '.')) != NULL) { 141 *cp++ = '\0'; 142 a_gid(cp); 143 } else 144 #endif 145 if ((cp = strchr(*argv, ':')) != NULL) { 146 *cp++ = '\0'; 147 a_gid(cp); 148 } 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 continue; 179 default: 180 break; 181 } 182 if (chown(p->fts_accpath, uid, gid) && !fflag) { 183 chownerr(p->fts_path); 184 rval = 1; 185 } 186 } 187 if (errno) 188 err(1, "fts_read"); 189 exit(rval); 190 } 191 192 void 193 a_gid(s) 194 char *s; 195 { 196 struct group *gr; 197 198 if (*s == '\0') /* Argument was "uid[:.]". */ 199 return; 200 gname = s; 201 gid = ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 202 } 203 204 void 205 a_uid(s) 206 char *s; 207 { 208 struct passwd *pw; 209 210 if (*s == '\0') /* Argument was "[:.]gid". */ 211 return; 212 uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 213 } 214 215 u_long 216 id(name, type) 217 char *name, *type; 218 { 219 u_long val; 220 char *ep; 221 222 /* 223 * XXX 224 * We know that uid_t's and gid_t's are unsigned longs. 225 */ 226 errno = 0; 227 val = strtoul(name, &ep, 10); 228 if (errno) 229 err(1, "%s", name); 230 if (*ep != '\0') 231 errx(1, "%s: illegal %s name", name, type); 232 return (val); 233 } 234 235 void 236 chownerr(file) 237 char *file; 238 { 239 static int euid = -1, ngroups = -1; 240 gid_t groups[NGROUPS]; 241 242 /* Check for chown without being root. */ 243 if (errno != EPERM || 244 uid != -1 && euid == -1 && (euid = geteuid()) != 0) { 245 if (fflag) 246 exit(0); 247 err(1, "%s", file); 248 } 249 250 /* Check group membership; kernel just returns EPERM. */ 251 if (gid != -1 && ngroups == -1) { 252 ngroups = getgroups(NGROUPS, groups); 253 while (--ngroups >= 0 && gid != groups[ngroups]); 254 if (ngroups < 0) { 255 if (fflag) 256 exit(0); 257 errx(1, "you are not a member of group %s", gname); 258 } 259 } 260 261 if (!fflag) 262 warn("%s", file); 263 } 264 265 void 266 usage() 267 { 268 (void)fprintf(stderr, 269 "usage: %s [-R [-H | -L | -P]] [-f] %s file ...\n", 270 myname, ischown ? "[owner][:group]" : "group"); 271 exit(1); 272 } 273