chown.c revision 114601
10SN/A/* 22509Sihse * Copyright (c) 1988, 1993, 1994 30SN/A * The Regents of the University of California. All rights reserved. 40SN/A * 50SN/A * Redistribution and use in source and binary forms, with or without 60SN/A * modification, are permitted provided that the following conditions 7180SN/A * are met: 80SN/A * 1. Redistributions of source code must retain the above copyright 9180SN/A * notice, this list of conditions and the following disclaimer. 100SN/A * 2. Redistributions in binary form must reproduce the above copyright 110SN/A * notice, this list of conditions and the following disclaimer in the 120SN/A * documentation and/or other materials provided with the distribution. 130SN/A * 3. All advertising materials mentioning features or use of this software 140SN/A * must display the following acknowledgement: 150SN/A * This product includes software developed by the University of 160SN/A * California, Berkeley and its contributors. 170SN/A * 4. Neither the name of the University nor the names of its contributors 180SN/A * may be used to endorse or promote products derived from this software 190SN/A * without specific prior written permission. 200SN/A * 21180SN/A * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22180SN/A * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23180SN/A * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 240SN/A * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 250SN/A * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261410Sihse * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271410Sihse * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281410Sihse * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291410Sihse * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301410Sihse * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311410Sihse * SUCH DAMAGE. 32910SN/A */ 33910SN/A 341410Sihse#if 0 355SN/A#ifndef lint 36910SN/Astatic const char copyright[] = 371410Sihse"@(#) Copyright (c) 1988, 1993, 1994\n\ 38910SN/A The Regents of the University of California. All rights reserved.\n"; 39338SN/A#endif /* not lint */ 401426Sihse 411410Sihse#ifndef lint 421426Sihsestatic char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94"; 431410Sihse#endif /* not lint */ 441410Sihse#endif 451426Sihse#include <sys/cdefs.h> 461426Sihse__FBSDID("$FreeBSD: head/usr.sbin/chown/chown.c 114601 2003-05-03 21:06:42Z obrien $"); 47311SN/A 481426Sihse#include <sys/param.h> 491426Sihse#include <sys/stat.h> 501426Sihse 511410Sihse#include <err.h> 521426Sihse#include <errno.h> 531651Sihse#include <fts.h> 542509Sihse#include <grp.h> 551120SN/A#include <libgen.h> 561410Sihse#include <pwd.h> 571410Sihse#include <stdint.h> 581410Sihse#include <stdio.h> 591426Sihse#include <stdlib.h> 601426Sihse#include <string.h> 611426Sihse#include <unistd.h> 621426Sihse 631426Sihsevoid a_gid(const char *); 641426Sihsevoid a_uid(const char *); 651426Sihsevoid chownerr(const char *); 661426Sihseu_long id(const char *, const char *); 671426Sihsevoid usage(void); 681426Sihse 692475Sihseuid_t uid; 701426Sihsegid_t gid; 711426Sihseint ischown; 721426Sihseconst char *gname; 731426Sihse 741426Sihseint 751426Sihsemain(int argc, char **argv) 761426Sihse{ 771426Sihse FTS *ftsp; 781426Sihse FTSENT *p; 791426Sihse int Hflag, Lflag, Rflag, fflag, hflag, vflag; 801426Sihse int ch, fts_options, rval; 811426Sihse char *cp; 821426Sihse 831426Sihse ischown = (strcmp(basename(argv[0]), "chown") == 0); 841426Sihse 851426Sihse Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 861426Sihse while ((ch = getopt(argc, argv, "HLPRfhv")) != -1) 871426Sihse switch (ch) { 881426Sihse case 'H': 891426Sihse Hflag = 1; 901426Sihse Lflag = 0; 911426Sihse break; 921426Sihse case 'L': 931426Sihse Lflag = 1; 941426Sihse Hflag = 0; 951426Sihse break; 961426Sihse case 'P': 971426Sihse Hflag = Lflag = 0; 981426Sihse break; 991426Sihse case 'R': 1001426Sihse Rflag = 1; 1011426Sihse break; 1021426Sihse case 'f': 1031426Sihse fflag = 1; 1041426Sihse break; 1051426Sihse case 'h': 1061426Sihse hflag = 1; 1071426Sihse break; 1081426Sihse case 'v': 1091426Sihse vflag++; 1101426Sihse break; 1111426Sihse case '?': 1121426Sihse default: 1131426Sihse usage(); 1141426Sihse } 1151426Sihse argv += optind; 1161426Sihse argc -= optind; 1171426Sihse 1181426Sihse if (argc < 2) 1191426Sihse usage(); 1201426Sihse 1211426Sihse if (Rflag) { 1221426Sihse fts_options = FTS_PHYSICAL; 1231426Sihse if (hflag && (Hflag || Lflag)) 1241410Sihse errx(1, "the -R%c and -h options may not be " 1251120SN/A "specified together", Hflag ? 'H' : 'L'); 1261426Sihse if (Hflag) 1271426Sihse fts_options |= FTS_COMFOLLOW; 1281426Sihse else if (Lflag) { 1291426Sihse fts_options &= ~FTS_PHYSICAL; 1301426Sihse fts_options |= FTS_LOGICAL; 1311426Sihse } 1321426Sihse } else 1331410Sihse fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 1341426Sihse 1351426Sihse uid = (uid_t)-1; 1361426Sihse gid = (gid_t)-1; 13727SN/A if (ischown) { 1381410Sihse if ((cp = strchr(*argv, ':')) != NULL) { 1391410Sihse *cp++ = '\0'; 1401701Sihse a_gid(cp); 1411701Sihse } 1421701Sihse#ifdef SUPPORT_DOT 1431410Sihse else if ((cp = strchr(*argv, '.')) != NULL) { 1441410Sihse warnx("separation of user and group with a period is deprecated"); 1451410Sihse *cp++ = '\0'; 1461410Sihse a_gid(cp); 1471410Sihse } 1481410Sihse#endif 1491410Sihse a_uid(*argv); 1501426Sihse } else 1511426Sihse a_gid(*argv); 1521410Sihse 1531410Sihse if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 1541410Sihse err(1, NULL); 1551156SN/A 1561120SN/A for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 1571936Sihse switch (p->fts_info) { 1581936Sihse case FTS_D: /* Change it at FTS_DP. */ 1591936Sihse if (!Rflag) 1602360Sihse fts_set(ftsp, p, FTS_SKIP); 1611426Sihse continue; 1621426Sihse case FTS_DNR: /* Warn, chown. */ 1631426Sihse warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 1641410Sihse rval = 1; 16527SN/A break; 1661426Sihse case FTS_ERR: /* Warn, continue. */ 1671426Sihse case FTS_NS: 1681426Sihse warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 1691426Sihse rval = 1; 1701426Sihse continue; 1711426Sihse case FTS_SL: 1721651Sihse case FTS_SLNONE: 1731651Sihse /* 1741915Sihse * The only symlinks that end up here are ones that 1751651Sihse * don't point to anything and ones that we found 1761651Sihse * doing a physical walk. 1771651Sihse */ 1781651Sihse if (hflag) 1791426Sihse break; 1801426Sihse else 1811426Sihse continue; 1821426Sihse default: 1831651Sihse break; 1841426Sihse } 1851410Sihse if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) && 1861410Sihse (gid == (gid_t)-1 || gid == p->fts_statp->st_gid)) 1871410Sihse continue; 1881651Sihse if ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) { 1891410Sihse if (!fflag) { 1901426Sihse chownerr(p->fts_path); 1911651Sihse rval = 1; 1921651Sihse } 1931651Sihse } else { 1941651Sihse if (vflag) { 1951651Sihse printf("%s", p->fts_path); 1961651Sihse if (vflag > 1) { 1971651Sihse if (ischown) { 1981651Sihse printf(": %ju:%ju -> %ju:%ju", 1991651Sihse (uintmax_t) 2001651Sihse p->fts_statp->st_uid, 2011651Sihse (uintmax_t) 2021651Sihse p->fts_statp->st_gid, 2031651Sihse (uid == (uid_t)-1) ? 2041651Sihse (uintmax_t) 2051410Sihse p->fts_statp->st_uid : 2061410Sihse (uintmax_t)uid, 2071410Sihse (gid == (gid_t)-1) ? 2081410Sihse (uintmax_t) 2090SN/A p->fts_statp->st_gid : 2101426Sihse (uintmax_t)gid); 2111410Sihse } else { 2121410Sihse printf(": %ju -> %ju", 2131410Sihse (uintmax_t) 2141410Sihse p->fts_statp->st_gid, 2151410Sihse (gid == (gid_t)-1) ? 2161410Sihse (uintmax_t) 2171410Sihse p->fts_statp->st_gid : 2181410Sihse (uintmax_t)gid); 2191410Sihse } 2201426Sihse } 2211426Sihse printf("\n"); 2221426Sihse } 2231426Sihse } 2241426Sihse } 2251426Sihse if (errno) 2261426Sihse err(1, "fts_read"); 2271426Sihse exit(rval); 2281651Sihse} 2291651Sihse 2301651Sihsevoid 2311410Sihsea_gid(const char *s) 2321862Serikj{ 2331862Serikj struct group *gr; 2341410Sihse 2351410Sihse if (*s == '\0') /* Argument was "uid[:.]". */ 2361410Sihse return; 2371410Sihse gname = s; 2381410Sihse gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group"); 2391410Sihse} 2401426Sihse 2411426Sihsevoid 2421426Sihsea_uid(const char *s) 2431426Sihse{ 2441426Sihse struct passwd *pw; 2451426Sihse 2461426Sihse if (*s == '\0') /* Argument was "[:.]gid". */ 2471426Sihse return; 2481426Sihse uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user"); 2491426Sihse} 2501426Sihse 2511426Sihseu_long 2521426Sihseid(const char *name, const char *type) 2531327SN/A{ 2542509Sihse u_long val; 2552509Sihse char *ep; 2562509Sihse 2572509Sihse /* 2582509Sihse * XXX 2591628Sihse * We know that uid_t's and gid_t's are unsigned longs. 2601628Sihse */ 2611628Sihse errno = 0; 2621410Sihse val = strtoul(name, &ep, 10); 2631410Sihse if (errno) 2641410Sihse err(1, "%s", name); 2651410Sihse if (*ep != '\0') 2661410Sihse errx(1, "%s: illegal %s name", name, type); 2671410Sihse return (val); 2681410Sihse} 2691410Sihse 2701410Sihsevoid 2711426Sihsechownerr(const char *file) 2721426Sihse{ 2731426Sihse static uid_t euid = -1; 2741410Sihse static int ngroups = -1; 2751651Sihse gid_t groups[NGROUPS_MAX]; 2762034Serikj 2772034Serikj /* Check for chown without being root. */ 2782034Serikj if (errno != EPERM || (uid != (uid_t)-1 && 2792034Serikj euid == (uid_t)-1 && (euid = geteuid()) != 0)) { 2802034Serikj warn("%s", file); 2811426Sihse return; 2822034Serikj } 2831410Sihse 2841410Sihse /* Check group membership; kernel just returns EPERM. */ 2851410Sihse if (gid != (gid_t)-1 && ngroups == -1 && 2862360Sihse euid == (uid_t)-1 && (euid = geteuid()) != 0) { 2871410Sihse ngroups = getgroups(NGROUPS_MAX, groups); 2880SN/A while (--ngroups >= 0 && gid != groups[ngroups]); 2891426Sihse if (ngroups < 0) { 2901426Sihse warnx("you are not a member of group %s", gname); 2911426Sihse return; 2921623Sihse } 2931862Serikj } 2941426Sihse warn("%s", file); 2951426Sihse} 2961862Serikj 2971426Sihsevoid 2981426Sihseusage(void) 2991426Sihse{ 3001426Sihse 3011426Sihse if (ischown) 3021426Sihse (void)fprintf(stderr, "%s\n%s\n", 3031426Sihse "usage: chown [-fhv] [-R [-H | -L | -P]] owner[:group]" 3041426Sihse " file ...", 3051862Serikj " chown [-fhv] [-R [-H | -L | -P]] :group file ..."); 3061623Sihse else 3071862Serikj (void)fprintf(stderr, "%s\n", 3081862Serikj "usage: chgrp [-fhv] [-R [-H | -L | -P]] group file ..."); 3091862Serikj exit(1); 3101862Serikj} 3111623Sihse