chown.c revision 57830
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 57830 2000-03-08 16:31:42Z obrien $"; 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 881553Srgrimes Hflag = Lflag = Pflag = hflag = 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 fts_options = FTS_PHYSICAL; 1261553Srgrimes if (Rflag) { 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 } 1351553Srgrimes } 1361553Srgrimes 1371553Srgrimes uid = gid = -1; 1381553Srgrimes if (ischown) { 13929656Swosch if ((cp = strchr(*argv, ':')) != NULL) { 1401553Srgrimes *cp++ = '\0'; 1411553Srgrimes a_gid(cp); 14229656Swosch } 14329656Swosch#ifdef SUPPORT_DOT 14429656Swosch else if ((cp = strchr(*argv, '.')) != NULL) { 1451553Srgrimes *cp++ = '\0'; 1461553Srgrimes a_gid(cp); 1478857Srgrimes } 14829656Swosch#endif 1491553Srgrimes a_uid(*argv); 1508857Srgrimes } else 1511553Srgrimes a_gid(*argv); 1521553Srgrimes 1531553Srgrimes if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 1541553Srgrimes err(1, NULL); 1551553Srgrimes 1561553Srgrimes for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 1571553Srgrimes switch (p->fts_info) { 15817597Sadam case FTS_D: /* Change it at FTS_DP. */ 15917597Sadam if (!Rflag) 16017597Sadam fts_set(ftsp, p, FTS_SKIP); 16117597Sadam continue; 1621553Srgrimes case FTS_DNR: /* Warn, chown, continue. */ 1631553Srgrimes warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 1641553Srgrimes rval = 1; 1651553Srgrimes break; 1661553Srgrimes case FTS_ERR: /* Warn, continue. */ 1671553Srgrimes case FTS_NS: 1681553Srgrimes warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 1691553Srgrimes rval = 1; 1701553Srgrimes continue; 17135632Sbde case FTS_SL: /* Ignore. */ 1721553Srgrimes case FTS_SLNONE: 1731553Srgrimes /* 1741553Srgrimes * The only symlinks that end up here are ones that 1751553Srgrimes * don't point to anything and ones that we found 1761553Srgrimes * doing a physical walk. 1771553Srgrimes */ 17824446Speter if (hflag) 17924446Speter break; 18024446Speter else 18124446Speter continue; 1821553Srgrimes default: 1831553Srgrimes break; 1841553Srgrimes } 18524446Speter if (hflag) { 18624446Speter if (lchown(p->fts_accpath, uid, gid) && !fflag) { 18724446Speter chownerr(p->fts_path); 18824446Speter rval = 1; 18953780Sobrien } else { 19053780Sobrien if (vflag) 19153780Sobrien (void)printf("%s\n", p->fts_accpath); 19224446Speter } 19324446Speter } else { 19424446Speter if (chown(p->fts_accpath, uid, gid) && !fflag) { 19524446Speter chownerr(p->fts_path); 19624446Speter rval = 1; 19753780Sobrien } else { 19853780Sobrien if (vflag) 19953780Sobrien (void)printf("%s\n", p->fts_accpath); 20024446Speter } 2011553Srgrimes } 2021553Srgrimes } 2031553Srgrimes if (errno) 2041553Srgrimes err(1, "fts_read"); 2051553Srgrimes exit(rval); 2061553Srgrimes} 2071553Srgrimes 2081553Srgrimesvoid 2091553Srgrimesa_gid(s) 2101553Srgrimes char *s; 2111553Srgrimes{ 2121553Srgrimes struct group *gr; 2131553Srgrimes 2141553Srgrimes if (*s == '\0') /* Argument was "uid[:.]". */ 2151553Srgrimes return; 2161553Srgrimes gname = s; 2171553Srgrimes gid = ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid; 2181553Srgrimes} 2191553Srgrimes 2201553Srgrimesvoid 2211553Srgrimesa_uid(s) 2221553Srgrimes char *s; 2231553Srgrimes{ 2241553Srgrimes struct passwd *pw; 2251553Srgrimes 2261553Srgrimes if (*s == '\0') /* Argument was "[:.]gid". */ 2271553Srgrimes return; 2281553Srgrimes uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid; 2291553Srgrimes} 2301553Srgrimes 2311553Srgrimesu_long 2321553Srgrimesid(name, type) 2331553Srgrimes char *name, *type; 2341553Srgrimes{ 2351553Srgrimes u_long val; 2361553Srgrimes char *ep; 2371553Srgrimes 2381553Srgrimes /* 2391553Srgrimes * XXX 2401553Srgrimes * We know that uid_t's and gid_t's are unsigned longs. 2411553Srgrimes */ 2421553Srgrimes errno = 0; 2431553Srgrimes val = strtoul(name, &ep, 10); 2441553Srgrimes if (errno) 2451553Srgrimes err(1, "%s", name); 2461553Srgrimes if (*ep != '\0') 2471553Srgrimes errx(1, "%s: illegal %s name", name, type); 2481553Srgrimes return (val); 2491553Srgrimes} 2501553Srgrimes 2511553Srgrimesvoid 2521553Srgrimeschownerr(file) 2531553Srgrimes char *file; 2541553Srgrimes{ 2551553Srgrimes static int euid = -1, ngroups = -1; 2563032Sdg gid_t groups[NGROUPS]; 2571553Srgrimes 2581553Srgrimes /* Check for chown without being root. */ 2591553Srgrimes if (errno != EPERM || 26028643Ssteve (uid != -1 && euid == -1 && (euid = geteuid()) != 0)) 2611553Srgrimes err(1, "%s", file); 2621553Srgrimes 2631553Srgrimes /* Check group membership; kernel just returns EPERM. */ 26428643Ssteve if (gid != -1 && ngroups == -1 && 26528643Ssteve euid == -1 && (euid = geteuid()) != 0) { 2661553Srgrimes ngroups = getgroups(NGROUPS, groups); 2671553Srgrimes while (--ngroups >= 0 && gid != groups[ngroups]); 26828643Ssteve if (ngroups < 0) 2691553Srgrimes errx(1, "you are not a member of group %s", gname); 2701553Srgrimes } 27128643Ssteve warn("%s", file); 2721553Srgrimes} 2731553Srgrimes 2741553Srgrimesvoid 2751553Srgrimesusage() 2761553Srgrimes{ 27729105Scharnier (void)fprintf(stderr, "%s\n%s\n%s\n", 27853780Sobrien "usage: chown [-R [-H | -L | -P]] [-f] [-h] [-v] owner[:group] file ...", 27953780Sobrien " chown [-R [-H | -L | -P]] [-f] [-h] [-v] :group file ...", 28053780Sobrien " chgrp [-R [-H | -L | -P]] [-f] [-h] [-v] group file ..."); 2811553Srgrimes exit(1); 2821553Srgrimes} 283