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 = 0; 89 while ((ch = getopt(argc, argv, "HLPRfh")) != -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 '?': 113 default: 114 usage(); 115 } 116 argv += optind; 117 argc -= optind; 118 119 if (argc < 2) 120 usage(); 121 122 fts_options = FTS_PHYSICAL; 123 if (Rflag) { 124 if (hflag && (Lflag || Hflag)) 125 errx(1, "the -R and -h options may not be specified together"); 126 if (Hflag) 127 fts_options |= FTS_COMFOLLOW; 128 if (Lflag) { 129 fts_options &= ~FTS_PHYSICAL; 130 fts_options |= FTS_LOGICAL; 131 } 132 } 133 134 uid = gid = -1; 135 if (ischown) { 136 if ((cp = strchr(*argv, ':')) != NULL) { 137 *cp++ = '\0'; 138 a_gid(cp); 139 } 140 #ifdef SUPPORT_DOT 141 else if ((cp = strchr(*argv, '.')) != NULL) { 142 *cp++ = '\0'; 143 a_gid(cp); 144 } 145 #endif 146 a_uid(*argv); 147 } else 148 a_gid(*argv); 149 150 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 151 err(1, NULL); 152 153 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 154 switch (p->fts_info) { 155 case FTS_D: /* Change it at FTS_DP. */ 156 if (!Rflag) 157 fts_set(ftsp, p, FTS_SKIP); 158 continue; 159 case FTS_DNR: /* Warn, chown, continue. */ 160 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 161 rval = 1; 162 break; 163 case FTS_ERR: /* Warn, continue. */ 164 case FTS_NS: 165 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 166 rval = 1; 167 continue; 168 case FTS_SL: /* Ignore. */ 169 case FTS_SLNONE: 170 /* 171 * The only symlinks that end up here are ones that 172 * don't point to anything and ones that we found 173 * doing a physical walk. 174 */ 175 if (hflag) 176 break; 177 else 178 continue; 179 default: 180 break; 181 } 182 if (hflag) { 183 if (lchown(p->fts_accpath, uid, gid) && !fflag) { 184 chownerr(p->fts_path); 185 rval = 1; 186 } else { 187 if (vflag) 188 (void)printf("%s\n", p->fts_accpath); 189 } 190 } else { 191 if (chown(p->fts_accpath, uid, gid) && !fflag) { 192 chownerr(p->fts_path); 193 rval = 1; 194 } else { 195 if (vflag) 196 (void)printf("%s\n", p->fts_accpath); 197 } 198 } 199 } 200 if (errno) 201 err(1, "fts_read"); 202 exit(rval); 203 } 204 205 void 206 a_gid(s) 207 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) ? id(s, "group") : gr->gr_gid; 215 } 216 217 void 218 a_uid(s) 219 char *s; 220 { 221 struct passwd *pw; 222 223 if (*s == '\0') /* Argument was "[:.]gid". */ 224 return; 225 uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 226 } 227 228 u_long 229 id(name, type) 230 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 char *file; 251 { 252 static int euid = -1, ngroups = -1; 253 gid_t groups[NGROUPS]; 254 255 /* Check for chown without being root. */ 256 if (errno != EPERM || 257 (uid != -1 && euid == -1 && (euid = geteuid()) != 0)) 258 err(1, "%s", file); 259 260 /* Check group membership; kernel just returns EPERM. */ 261 if (gid != -1 && ngroups == -1 && 262 euid == -1 && (euid = geteuid()) != 0) { 263 ngroups = getgroups(NGROUPS, groups); 264 while (--ngroups >= 0 && gid != groups[ngroups]); 265 if (ngroups < 0) 266 errx(1, "you are not a member of group %s", gname); 267 } 268 warn("%s", file); 269 } 270 271 void 272 usage() 273 { 274 (void)fprintf(stderr, "%s\n%s\n%s\n", 275 "usage: chown [-R [-H | -L | -P]] [-f] [-h] [-v] owner[:group] file ...", 276 " chown [-R [-H | -L | -P]] [-f] [-h] [-v] :group file ...", 277 " chgrp [-R [-H | -L | -P]] [-f] [-h] [-v] group file ..."); 278 exit(1); 279 } 280