chown.c revision 83410
1285SN/A/* 2821Saefimov * Copyright (c) 1988, 1993, 1994 3285SN/A * The Regents of the University of California. All rights reserved. 4285SN/A * 5285SN/A * Redistribution and use in source and binary forms, with or without 6285SN/A * modification, are permitted provided that the following conditions 7285SN/A * are met: 8285SN/A * 1. Redistributions of source code must retain the above copyright 9285SN/A * notice, this list of conditions and the following disclaimer. 10285SN/A * 2. Redistributions in binary form must reproduce the above copyright 11285SN/A * notice, this list of conditions and the following disclaimer in the 12285SN/A * documentation and/or other materials provided with the distribution. 13285SN/A * 3. All advertising materials mentioning features or use of this software 14285SN/A * must display the following acknowledgement: 15285SN/A * This product includes software developed by the University of 16285SN/A * California, Berkeley and its contributors. 17285SN/A * 4. Neither the name of the University nor the names of its contributors 18285SN/A * may be used to endorse or promote products derived from this software 19285SN/A * without specific prior written permission. 20285SN/A * 21285SN/A * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22285SN/A * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23285SN/A * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24285SN/A * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25285SN/A * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26285SN/A * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27285SN/A * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28821Saefimov * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29821Saefimov * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30821Saefimov * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31367SN/A * SUCH DAMAGE. 32367SN/A */ 33821Saefimov 34367SN/A#ifndef lint 35285SN/Astatic const char copyright[] = 36285SN/A"@(#) Copyright (c) 1988, 1993, 1994\n\ 37285SN/A The Regents of the University of California. All rights reserved.\n"; 38285SN/A#endif /* not lint */ 39285SN/A 40285SN/A#ifndef lint 41821Saefimov#if 0 42285SN/Astatic char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; 43285SN/A#else 44821Saefimovstatic const char rcsid[] = 45821Saefimov "$FreeBSD: head/usr.sbin/chown/chown.c 83410 2001-09-13 14:55:59Z ru $"; 46821Saefimov#endif 47285SN/A#endif /* not lint */ 48821Saefimov 49821Saefimov#include <sys/param.h> 50285SN/A#include <sys/stat.h> 51285SN/A 52285SN/A#include <err.h> 53821Saefimov#include <errno.h> 54285SN/A#include <fts.h> 55285SN/A#include <grp.h> 56821Saefimov#include <pwd.h> 57821Saefimov#include <stdio.h> 58285SN/A#include <stdlib.h> 59285SN/A#include <string.h> 60285SN/A#include <unistd.h> 61821Saefimov 62285SN/Avoid a_gid __P((const char *)); 63285SN/Avoid a_uid __P((const char *)); 64285SN/Avoid chownerr __P((const char *)); 65285SN/Au_long id __P((const char *, const char *)); 66285SN/Avoid usage __P((void)); 67285SN/A 68285SN/Auid_t uid; 69821Saefimovgid_t gid; 70285SN/Aint ischown; 71285SN/Aconst char *gname; 72285SN/A 73821Saefimovint 74285SN/Amain(argc, argv) 75285SN/A int argc; 76285SN/A char *argv[]; 77285SN/A{ 78285SN/A FTS *ftsp; 79285SN/A FTSENT *p; 80285SN/A int Hflag, Lflag, Rflag, fflag, hflag, vflag; 81821Saefimov int ch, fts_options, rval; 82821Saefimov char *cp; 83821Saefimov 84821Saefimov cp = strrchr(argv[0], '/'); 85821Saefimov cp = (cp != NULL) ? cp + 1 : argv[0]; 86821Saefimov ischown = (strcmp(cp, "chown") == 0); 87821Saefimov 88821Saefimov Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 89821Saefimov while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 90821Saefimov switch (ch) { 91821Saefimov case 'H': 92821Saefimov Hflag = 1; 93821Saefimov Lflag = 0; 94821Saefimov break; 95821Saefimov case 'L': 96821Saefimov Lflag = 1; 97821Saefimov Hflag = 0; 98821Saefimov break; 99821Saefimov case 'P': 100821Saefimov Hflag = Lflag = 0; 101821Saefimov break; 102821Saefimov case 'R': 103821Saefimov Rflag = 1; 104821Saefimov break; 105821Saefimov case 'f': 106821Saefimov fflag = 1; 107821Saefimov break; 108821Saefimov case 'h': 109821Saefimov hflag = 1; 110821Saefimov break; 111821Saefimov case 'v': 112821Saefimov vflag = 1; 113821Saefimov break; 114821Saefimov case '?': 115821Saefimov default: 116821Saefimov usage(); 117821Saefimov } 118285SN/A argv += optind; 119285SN/A argc -= optind; 120285SN/A 121821Saefimov if (argc < 2) 122285SN/A usage(); 123285SN/A 124285SN/A if (Rflag) { 125285SN/A fts_options = FTS_PHYSICAL; 126285SN/A if (hflag && (Hflag || Lflag)) 127285SN/A errx(1, "the -R%c and -h options may not be " 128285SN/A "specified together", Hflag ? 'H' : 'L'); 129821Saefimov if (Hflag) 130285SN/A fts_options |= FTS_COMFOLLOW; 131285SN/A else if (Lflag) { 132821Saefimov fts_options &= ~FTS_PHYSICAL; 133821Saefimov fts_options |= FTS_LOGICAL; 134821Saefimov } 135821Saefimov } else 136285SN/A fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 137821Saefimov 138821Saefimov uid = (uid_t)-1; 139821Saefimov gid = (gid_t)-1; 140285SN/A if (ischown) { 141285SN/A if ((cp = strchr(*argv, ':')) != NULL) { 142285SN/A *cp++ = '\0'; 143285SN/A a_gid(cp); 144 } 145#ifdef SUPPORT_DOT 146 else if ((cp = strchr(*argv, '.')) != NULL) { 147 *cp++ = '\0'; 148 a_gid(cp); 149 } 150#endif 151 a_uid(*argv); 152 } else 153 a_gid(*argv); 154 155 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 156 err(1, NULL); 157 158 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 159 switch (p->fts_info) { 160 case FTS_D: /* Change it at FTS_DP. */ 161 if (!Rflag) 162 fts_set(ftsp, p, FTS_SKIP); 163 continue; 164 case FTS_DNR: /* Warn, chown. */ 165 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 166 rval = 1; 167 break; 168 case FTS_ERR: /* Warn, continue. */ 169 case FTS_NS: 170 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 171 rval = 1; 172 continue; 173 case FTS_SL: 174 case FTS_SLNONE: 175 /* 176 * The only symlinks that end up here are ones that 177 * don't point to anything and ones that we found 178 * doing a physical walk. 179 */ 180 if (hflag) 181 break; 182 else 183 continue; 184 default: 185 break; 186 } 187 if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) && 188 (gid == (gid_t)-1 || gid == p->fts_statp->st_gid)) 189 continue; 190 if ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) { 191 if (!fflag) { 192 chownerr(p->fts_path); 193 rval = 1; 194 } 195 } else { 196 if (vflag) 197 printf("%s\n", p->fts_path); 198 } 199 } 200 if (errno) 201 err(1, "fts_read"); 202 exit(rval); 203} 204 205void 206a_gid(s) 207 const 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) ? gr->gr_gid : id(s, "group"); 215} 216 217void 218a_uid(s) 219 const char *s; 220{ 221 struct passwd *pw; 222 223 if (*s == '\0') /* Argument was "[:.]gid". */ 224 return; 225 uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); 226} 227 228u_long 229id(name, type) 230 const 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 248void 249chownerr(file) 250 const char *file; 251{ 252 static uid_t euid = -1; 253 static int ngroups = -1; 254 gid_t groups[NGROUPS_MAX]; 255 256 /* Check for chown without being root. */ 257 if (errno != EPERM || 258 (uid != (uid_t)-1 && euid == (uid_t)-1 && (euid = geteuid()) != 0)) 259 err(1, "%s", file); 260 261 /* Check group membership; kernel just returns EPERM. */ 262 if (gid != (gid_t)-1 && ngroups == -1 && 263 euid == (uid_t)-1 && (euid = geteuid()) != 0) { 264 ngroups = getgroups(NGROUPS_MAX, groups); 265 while (--ngroups >= 0 && gid != groups[ngroups]); 266 if (ngroups < 0) 267 errx(1, "you are not a member of group %s", gname); 268 } 269 warn("%s", file); 270} 271 272void 273usage() 274{ 275 276 if (ischown) 277 (void)fprintf(stderr, "%s\n%s\n", 278 "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]" 279 " file ...", 280 " chown [-fhv] [-R [-H | -L | -P]] :group file ..."); 281 else 282 (void)fprintf(stderr, "%s\n", 283 "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ..."); 284 exit(1); 285} 286