1/*- 2 * Copyright (c) 1989, 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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if 0 31#ifndef lint 32static char const copyright[] = 33"@(#) Copyright (c) 1989, 1993, 1994\n\ 34 The Regents of the University of California. All rights reserved.\n"; 35#endif /* not lint */ 36 37#ifndef lint 38static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94"; 39#endif /* not lint */ 40#endif 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: stable/11/bin/chmod/chmod.c 306977 2016-10-10 16:08:29Z sevan $"); 43 44#include <sys/param.h> 45#include <sys/stat.h> 46 47#include <err.h> 48#include <errno.h> 49#include <fcntl.h> 50#include <fts.h> 51#include <limits.h> 52#include <stdio.h> 53#include <stdlib.h> 54#include <string.h> 55#include <unistd.h> 56 57static void usage(void); 58static int may_have_nfs4acl(const FTSENT *ent, int hflag); 59 60int 61main(int argc, char *argv[]) 62{ 63 FTS *ftsp; 64 FTSENT *p; 65 mode_t *set; 66 int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval; 67 int vflag; 68 char *mode; 69 mode_t newmode; 70 71 set = NULL; 72 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 73 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 74 switch (ch) { 75 case 'H': 76 Hflag = 1; 77 Lflag = 0; 78 break; 79 case 'L': 80 Lflag = 1; 81 Hflag = 0; 82 break; 83 case 'P': 84 Hflag = Lflag = 0; 85 break; 86 case 'R': 87 Rflag = 1; 88 break; 89 case 'f': 90 fflag = 1; 91 break; 92 case 'h': 93 /* 94 * In System V the -h option causes chmod to change 95 * the mode of the symbolic link. 4.4BSD's symbolic 96 * links didn't have modes, so it was an undocumented 97 * noop. In FreeBSD 3.0, lchmod(2) is introduced and 98 * this option does real work. 99 */ 100 hflag = 1; 101 break; 102 /* 103 * XXX 104 * "-[rwx]" are valid mode commands. If they are the entire 105 * argument, getopt has moved past them, so decrement optind. 106 * Regardless, we're done argument processing. 107 */ 108 case 'g': case 'o': case 'r': case 's': 109 case 't': case 'u': case 'w': case 'X': case 'x': 110 if (argv[optind - 1][0] == '-' && 111 argv[optind - 1][1] == ch && 112 argv[optind - 1][2] == '\0') 113 --optind; 114 goto done; 115 case 'v': 116 vflag++; 117 break; 118 case '?': 119 default: 120 usage(); 121 } 122done: argv += optind; 123 argc -= optind; 124 125 if (argc < 2) 126 usage(); 127 128 if (Rflag) { 129 if (hflag) 130 errx(1, "the -R and -h options may not be " 131 "specified together."); 132 if (Lflag) { 133 fts_options = FTS_LOGICAL; 134 } else { 135 fts_options = FTS_PHYSICAL; 136 137 if (Hflag) { 138 fts_options |= FTS_COMFOLLOW; 139 } 140 } 141 } else if (hflag) { 142 fts_options = FTS_PHYSICAL; 143 } else { 144 fts_options = FTS_LOGICAL; 145 } 146 147 mode = *argv; 148 if ((set = setmode(mode)) == NULL) 149 errx(1, "invalid file mode: %s", mode); 150 151 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 152 err(1, "fts_open"); 153 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 154 int atflag; 155 156 if ((fts_options & FTS_LOGICAL) || 157 ((fts_options & FTS_COMFOLLOW) && 158 p->fts_level == FTS_ROOTLEVEL)) 159 atflag = 0; 160 else 161 atflag = AT_SYMLINK_NOFOLLOW; 162 163 switch (p->fts_info) { 164 case FTS_D: 165 if (!Rflag) 166 fts_set(ftsp, p, FTS_SKIP); 167 break; 168 case FTS_DNR: /* Warn, chmod. */ 169 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 170 rval = 1; 171 break; 172 case FTS_DP: /* Already changed at FTS_D. */ 173 continue; 174 case FTS_ERR: /* Warn, continue. */ 175 case FTS_NS: 176 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 177 rval = 1; 178 continue; 179 default: 180 break; 181 } 182 newmode = getmode(set, p->fts_statp->st_mode); 183 /* 184 * With NFSv4 ACLs, it is possible that applying a mode 185 * identical to the one computed from an ACL will change 186 * that ACL. 187 */ 188 if (may_have_nfs4acl(p, hflag) == 0 && 189 (newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 190 continue; 191 if (fchmodat(AT_FDCWD, p->fts_accpath, newmode, atflag) == -1 192 && !fflag) { 193 warn("%s", p->fts_path); 194 rval = 1; 195 } else if (vflag) { 196 (void)printf("%s", p->fts_path); 197 198 if (vflag > 1) { 199 char m1[12], m2[12]; 200 201 strmode(p->fts_statp->st_mode, m1); 202 strmode((p->fts_statp->st_mode & 203 S_IFMT) | newmode, m2); 204 (void)printf(": 0%o [%s] -> 0%o [%s]", 205 p->fts_statp->st_mode, m1, 206 (p->fts_statp->st_mode & S_IFMT) | 207 newmode, m2); 208 } 209 (void)printf("\n"); 210 } 211 } 212 if (errno) 213 err(1, "fts_read"); 214 exit(rval); 215} 216 217static void 218usage(void) 219{ 220 (void)fprintf(stderr, 221 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 222 exit(1); 223} 224 225static int 226may_have_nfs4acl(const FTSENT *ent, int hflag) 227{ 228 int ret; 229 static dev_t previous_dev = NODEV; 230 static int supports_acls = -1; 231 232 if (previous_dev != ent->fts_statp->st_dev) { 233 previous_dev = ent->fts_statp->st_dev; 234 supports_acls = 0; 235 236 if (hflag) 237 ret = lpathconf(ent->fts_accpath, _PC_ACL_NFS4); 238 else 239 ret = pathconf(ent->fts_accpath, _PC_ACL_NFS4); 240 if (ret > 0) 241 supports_acls = 1; 242 else if (ret < 0 && errno != EINVAL) 243 warn("%s", ent->fts_path); 244 } 245 246 return (supports_acls); 247} 248