chown.c revision 77522
11553Srgrimes/* 21553Srgrimes * Copyright (c) 1988, 1993, 1994 31553Srgrimes * The Regents of the University of California. All rights reserved. 41553Srgrimes * 51553Srgrimes * Redistribution and use in source and binary forms, with or without 61553Srgrimes * modification, are permitted provided that the following conditions 71553Srgrimes * are met: 81553Srgrimes * 1. Redistributions of source code must retain the above copyright 91553Srgrimes * notice, this list of conditions and the following disclaimer. 101553Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111553Srgrimes * notice, this list of conditions and the following disclaimer in the 121553Srgrimes * documentation and/or other materials provided with the distribution. 131553Srgrimes * 3. All advertising materials mentioning features or use of this software 141553Srgrimes * must display the following acknowledgement: 151553Srgrimes * This product includes software developed by the University of 161553Srgrimes * California, Berkeley and its contributors. 171553Srgrimes * 4. Neither the name of the University nor the names of its contributors 181553Srgrimes * may be used to endorse or promote products derived from this software 191553Srgrimes * without specific prior written permission. 201553Srgrimes * 211553Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221553Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231553Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241553Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251553Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261553Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271553Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281553Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291553Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301553Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311553Srgrimes * SUCH DAMAGE. 321553Srgrimes */ 331553Srgrimes 341553Srgrimes#ifndef lint 3528643Sstevestatic const char copyright[] = 361553Srgrimes"@(#) Copyright (c) 1988, 1993, 1994\n\ 371553Srgrimes The Regents of the University of California. All rights reserved.\n"; 381553Srgrimes#endif /* not lint */ 391553Srgrimes 401553Srgrimes#ifndef lint 4128643Ssteve#if 0 421553Srgrimesstatic char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; 4328643Ssteve#else 4428643Sstevestatic const char rcsid[] = 4550479Speter "$FreeBSD: head/usr.sbin/chown/chown.c 77522 2001-05-31 11:47:20Z ru $"; 4628643Ssteve#endif 471553Srgrimes#endif /* not lint */ 481553Srgrimes 491553Srgrimes#include <sys/param.h> 501553Srgrimes#include <sys/stat.h> 511553Srgrimes 521553Srgrimes#include <ctype.h> 531553Srgrimes#include <dirent.h> 541553Srgrimes#include <err.h> 551553Srgrimes#include <errno.h> 561553Srgrimes#include <fts.h> 571553Srgrimes#include <grp.h> 581553Srgrimes#include <pwd.h> 591553Srgrimes#include <stdio.h> 601553Srgrimes#include <stdlib.h> 611553Srgrimes#include <string.h> 621553Srgrimes#include <unistd.h> 631553Srgrimes 641553Srgrimesvoid a_gid __P((char *)); 651553Srgrimesvoid a_uid __P((char *)); 661553Srgrimesvoid chownerr __P((char *)); 671553Srgrimesu_long id __P((char *, char *)); 681553Srgrimesvoid usage __P((void)); 691553Srgrimes 701553Srgrimesuid_t uid; 711553Srgrimesgid_t gid; 7253780Sobrienint Rflag, ischown, fflag, hflag, vflag; 731553Srgrimeschar *gname, *myname; 741553Srgrimes 751553Srgrimesint 761553Srgrimesmain(argc, argv) 771553Srgrimes int argc; 781553Srgrimes char *argv[]; 791553Srgrimes{ 801553Srgrimes FTS *ftsp; 811553Srgrimes FTSENT *p; 821553Srgrimes int Hflag, Lflag, Pflag, ch, fts_options, hflag, rval; 831553Srgrimes char *cp; 848857Srgrimes 851553Srgrimes myname = (cp = rindex(*argv, '/')) ? cp + 1 : *argv; 861553Srgrimes ischown = myname[2] == 'o'; 878857Srgrimes 8864014Speter Hflag = Lflag = Pflag = hflag = vflag = 0; 8957830Sobrien while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 901553Srgrimes switch (ch) { 911553Srgrimes case 'H': 921553Srgrimes Hflag = 1; 931553Srgrimes Lflag = Pflag = 0; 941553Srgrimes break; 951553Srgrimes case 'L': 961553Srgrimes Lflag = 1; 971553Srgrimes Hflag = Pflag = 0; 981553Srgrimes break; 991553Srgrimes case 'P': 1001553Srgrimes Pflag = 1; 1011553Srgrimes Hflag = Lflag = 0; 1021553Srgrimes break; 1031553Srgrimes case 'R': 1041553Srgrimes Rflag = 1; 1051553Srgrimes break; 1061553Srgrimes case 'f': 1071553Srgrimes fflag = 1; 1081553Srgrimes break; 1091553Srgrimes case 'h': 1101553Srgrimes hflag = 1; 1111553Srgrimes break; 11257830Sobrien case 'v': 11357830Sobrien vflag = 1; 11457830Sobrien break; 1151553Srgrimes case '?': 1161553Srgrimes default: 1171553Srgrimes usage(); 1181553Srgrimes } 1191553Srgrimes argv += optind; 1201553Srgrimes argc -= optind; 1211553Srgrimes 1221553Srgrimes if (argc < 2) 1231553Srgrimes usage(); 1241553Srgrimes 1251553Srgrimes if (Rflag) { 12677333Sru fts_options = FTS_PHYSICAL; 12734399Sjkh if (hflag && (Lflag || Hflag)) 12829105Scharnier errx(1, "the -R and -h options may not be specified together"); 1291553Srgrimes if (Hflag) 1301553Srgrimes fts_options |= FTS_COMFOLLOW; 1311553Srgrimes if (Lflag) { 1321553Srgrimes fts_options &= ~FTS_PHYSICAL; 1331553Srgrimes fts_options |= FTS_LOGICAL; 1341553Srgrimes } 13577333Sru } else 13677522Sru fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 1371553Srgrimes 1381553Srgrimes uid = gid = -1; 1391553Srgrimes if (ischown) { 14029656Swosch if ((cp = strchr(*argv, ':')) != NULL) { 1411553Srgrimes *cp++ = '\0'; 1421553Srgrimes a_gid(cp); 14329656Swosch } 14429656Swosch#ifdef SUPPORT_DOT 14529656Swosch else if ((cp = strchr(*argv, '.')) != NULL) { 1461553Srgrimes *cp++ = '\0'; 1471553Srgrimes a_gid(cp); 1488857Srgrimes } 14929656Swosch#endif 1501553Srgrimes a_uid(*argv); 1518857Srgrimes } else 1521553Srgrimes a_gid(*argv); 1531553Srgrimes 1541553Srgrimes if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 1551553Srgrimes err(1, NULL); 1561553Srgrimes 1571553Srgrimes for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 1581553Srgrimes switch (p->fts_info) { 15917597Sadam case FTS_D: /* Change it at FTS_DP. */ 16017597Sadam if (!Rflag) 16117597Sadam fts_set(ftsp, p, FTS_SKIP); 16217597Sadam continue; 1631553Srgrimes case FTS_DNR: /* Warn, chown, continue. */ 1641553Srgrimes warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 1651553Srgrimes rval = 1; 1661553Srgrimes break; 1671553Srgrimes case FTS_ERR: /* Warn, continue. */ 1681553Srgrimes case FTS_NS: 1691553Srgrimes warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 1701553Srgrimes rval = 1; 1711553Srgrimes continue; 17235632Sbde case FTS_SL: /* Ignore. */ 1731553Srgrimes case FTS_SLNONE: 1741553Srgrimes /* 1751553Srgrimes * The only symlinks that end up here are ones that 1761553Srgrimes * don't point to anything and ones that we found 1771553Srgrimes * doing a physical walk. 1781553Srgrimes */ 17924446Speter if (hflag) 18024446Speter break; 18124446Speter else 18224446Speter continue; 1831553Srgrimes default: 1841553Srgrimes break; 1851553Srgrimes } 18664014Speter if ((uid == -1 || uid == p->fts_statp->st_uid) && 18764014Speter (gid == -1 || gid == p->fts_statp->st_gid)) 18864014Speter continue; 18924446Speter if (hflag) { 19024446Speter if (lchown(p->fts_accpath, uid, gid) && !fflag) { 19124446Speter chownerr(p->fts_path); 19224446Speter rval = 1; 19353780Sobrien } else { 19453780Sobrien if (vflag) 19553780Sobrien (void)printf("%s\n", p->fts_accpath); 19624446Speter } 19724446Speter } else { 19824446Speter if (chown(p->fts_accpath, uid, gid) && !fflag) { 19924446Speter chownerr(p->fts_path); 20024446Speter rval = 1; 20153780Sobrien } else { 20253780Sobrien if (vflag) 20353780Sobrien (void)printf("%s\n", p->fts_accpath); 20424446Speter } 2051553Srgrimes } 2061553Srgrimes } 2071553Srgrimes if (errno) 2081553Srgrimes err(1, "fts_read"); 2091553Srgrimes exit(rval); 2101553Srgrimes} 2111553Srgrimes 2121553Srgrimesvoid 2131553Srgrimesa_gid(s) 2141553Srgrimes char *s; 2151553Srgrimes{ 2161553Srgrimes struct group *gr; 2171553Srgrimes 2181553Srgrimes if (*s == '\0') /* Argument was "uid[:.]". */ 2191553Srgrimes return; 2201553Srgrimes gname = s; 2211553Srgrimes gid = ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 2221553Srgrimes} 2231553Srgrimes 2241553Srgrimesvoid 2251553Srgrimesa_uid(s) 2261553Srgrimes char *s; 2271553Srgrimes{ 2281553Srgrimes struct passwd *pw; 2291553Srgrimes 2301553Srgrimes if (*s == '\0') /* Argument was "[:.]gid". */ 2311553Srgrimes return; 2321553Srgrimes uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 2331553Srgrimes} 2341553Srgrimes 2351553Srgrimesu_long 2361553Srgrimesid(name, type) 2371553Srgrimes char *name, *type; 2381553Srgrimes{ 2391553Srgrimes u_long val; 2401553Srgrimes char *ep; 2411553Srgrimes 2421553Srgrimes /* 2431553Srgrimes * XXX 2441553Srgrimes * We know that uid_t's and gid_t's are unsigned longs. 2451553Srgrimes */ 2461553Srgrimes errno = 0; 2471553Srgrimes val = strtoul(name, &ep, 10); 2481553Srgrimes if (errno) 2491553Srgrimes err(1, "%s", name); 2501553Srgrimes if (*ep != '\0') 2511553Srgrimes errx(1, "%s: illegal %s name", name, type); 2521553Srgrimes return (val); 2531553Srgrimes} 2541553Srgrimes 2551553Srgrimesvoid 2561553Srgrimeschownerr(file) 2571553Srgrimes char *file; 2581553Srgrimes{ 2591553Srgrimes static int euid = -1, ngroups = -1; 2603032Sdg gid_t groups[NGROUPS]; 2611553Srgrimes 2621553Srgrimes /* Check for chown without being root. */ 2631553Srgrimes if (errno != EPERM || 26428643Ssteve (uid != -1 && euid == -1 && (euid = geteuid()) != 0)) 2651553Srgrimes err(1, "%s", file); 2661553Srgrimes 2671553Srgrimes /* Check group membership; kernel just returns EPERM. */ 26828643Ssteve if (gid != -1 && ngroups == -1 && 26928643Ssteve euid == -1 && (euid = geteuid()) != 0) { 2701553Srgrimes ngroups = getgroups(NGROUPS, groups); 2711553Srgrimes while (--ngroups >= 0 && gid != groups[ngroups]); 27228643Ssteve if (ngroups < 0) 2731553Srgrimes errx(1, "you are not a member of group %s", gname); 2741553Srgrimes } 27528643Ssteve warn("%s", file); 2761553Srgrimes} 2771553Srgrimes 2781553Srgrimesvoid 2791553Srgrimesusage() 2801553Srgrimes{ 28129105Scharnier (void)fprintf(stderr, "%s\n%s\n%s\n", 28253780Sobrien "usage: chown [-R [-H | -L | -P]] [-f] [-h] [-v] owner[:group] file ...", 28353780Sobrien " chown [-R [-H | -L | -P]] [-f] [-h] [-v] :group file ...", 28453780Sobrien " chgrp [-R [-H | -L | -P]] [-f] [-h] [-v] group file ..."); 2851553Srgrimes exit(1); 2861553Srgrimes} 287