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 "$Id: chown.c,v 1.7 1997/08/24 02:10:29 steve Exp $"; 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; 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) 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 #ifdef SUPPORT_DOT 137 if ((cp = strchr(*argv, '.')) != NULL) { 138 *cp++ = '\0'; 139 a_gid(cp); 140 } else 141 #endif 142 if ((cp = strchr(*argv, ':')) != NULL) { 143 *cp++ = '\0'; 144 a_gid(cp); 145 } 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 } 187 } else { 188 if (chown(p->fts_accpath, uid, gid) && !fflag) { 189 chownerr(p->fts_path); 190 rval = 1; 191 } 192 } 193 } 194 if (errno) 195 err(1, "fts_read"); 196 exit(rval); 197 } 198 199 void 200 a_gid(s) 201 char *s; 202 { 203 struct group *gr; 204 205 if (*s == '\0') /* Argument was "uid[:.]". */ 206 return; 207 gname = s; 208 gid = ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 209 } 210 211 void 212 a_uid(s) 213 char *s; 214 { 215 struct passwd *pw; 216 217 if (*s == '\0') /* Argument was "[:.]gid". */ 218 return; 219 uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 220 } 221 222 u_long 223 id(name, type) 224 char *name, *type; 225 { 226 u_long val; 227 char *ep; 228 229 /* 230 * XXX 231 * We know that uid_t's and gid_t's are unsigned longs. 232 */ 233 errno = 0; 234 val = strtoul(name, &ep, 10); 235 if (errno) 236 err(1, "%s", name); 237 if (*ep != '\0') 238 errx(1, "%s: illegal %s name", name, type); 239 return (val); 240 } 241 242 void 243 chownerr(file) 244 char *file; 245 { 246 static int euid = -1, ngroups = -1; 247 gid_t groups[NGROUPS]; 248 249 /* Check for chown without being root. */ 250 if (errno != EPERM || 251 (uid != -1 && euid == -1 && (euid = geteuid()) != 0)) 252 err(1, "%s", file); 253 254 /* Check group membership; kernel just returns EPERM. */ 255 if (gid != -1 && ngroups == -1 && 256 euid == -1 && (euid = geteuid()) != 0) { 257 ngroups = getgroups(NGROUPS, groups); 258 while (--ngroups >= 0 && gid != groups[ngroups]); 259 if (ngroups < 0) 260 errx(1, "you are not a member of group %s", gname); 261 } 262 warn("%s", file); 263 } 264 265 void 266 usage() 267 { 268 (void)fprintf(stderr, "%s\n%s\n%s\n", 269 "usage: chown [-R [-H | -L | -P]] [-f] [-h] owner[:group] file ...", 270 " chown [-R [-H | -L | -P]] [-f] [-h] :group file ...", 271 " chgrp [-R [-H | -L | -P]] [-f] [-h] group file ..."); 272 exit(1); 273 } 274