chmod.c revision 77342
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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static char const copyright[] = 36"@(#) Copyright (c) 1989, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41#if 0 42static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94"; 43#endif 44static const char rcsid[] = 45 "$FreeBSD: head/bin/chmod/chmod.c 77342 2001-05-28 15:31:11Z ru $"; 46#endif /* not lint */ 47 48#include <sys/types.h> 49#include <sys/stat.h> 50 51#include <err.h> 52#include <errno.h> 53#include <fts.h> 54#include <limits.h> 55#include <stdio.h> 56#include <stdlib.h> 57#include <string.h> 58#include <unistd.h> 59 60int main __P((int, char *[])); 61void usage __P((void)); 62 63int 64main(argc, argv) 65 int argc; 66 char *argv[]; 67{ 68 FTS *ftsp; 69 FTSENT *p; 70 mode_t *set; 71 long val; 72 int oct, omode; 73 int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval; 74 int vflag; 75 char *ep, *mode; 76 int newmode; 77 int (*change_mode) __P((const char *, mode_t)); 78 79 set = NULL; 80 omode = 0; 81 Hflag = Lflag = Pflag = Rflag = fflag = hflag = vflag = 0; 82 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 83 switch (ch) { 84 case 'H': 85 Hflag = 1; 86 Lflag = Pflag = 0; 87 break; 88 case 'L': 89 Lflag = 1; 90 Hflag = Pflag = 0; 91 break; 92 case 'P': 93 Pflag = 1; 94 Hflag = Lflag = 0; 95 break; 96 case 'R': 97 Rflag = 1; 98 break; 99 case 'f': 100 fflag = 1; 101 break; 102 case 'h': 103 /* 104 * In System V (and probably POSIX.2) the -h option 105 * causes chmod to change the mode of the symbolic 106 * link. 4.4BSD's symbolic links didn't have modes, 107 * so it was an undocumented noop. In FreeBSD 3.0, 108 * lchmod(2) is introduced and this option does real 109 * work. 110 */ 111 hflag = 1; 112 break; 113 /* 114 * XXX 115 * "-[rwx]" are valid mode commands. If they are the entire 116 * argument, getopt has moved past them, so decrement optind. 117 * Regardless, we're done argument processing. 118 */ 119 case 'g': case 'o': case 'r': case 's': 120 case 't': case 'u': case 'w': case 'X': case 'x': 121 if (argv[optind - 1][0] == '-' && 122 argv[optind - 1][1] == ch && 123 argv[optind - 1][2] == '\0') 124 --optind; 125 goto done; 126 case 'v': 127 vflag = 1; 128 break; 129 case '?': 130 default: 131 usage(); 132 } 133done: argv += optind; 134 argc -= optind; 135 136 if (argc < 2) 137 usage(); 138 139 if (Rflag) { 140 fts_options = FTS_PHYSICAL; 141 if (hflag) 142 errx(1, 143 "the -R and -h options may not be specified together."); 144 if (Hflag) 145 fts_options |= FTS_COMFOLLOW; 146 if (Lflag) { 147 fts_options &= ~FTS_PHYSICAL; 148 fts_options |= FTS_LOGICAL; 149 } 150 } else 151 fts_options = FTS_LOGICAL; 152 153 if (hflag) 154 change_mode = lchmod; 155 else 156 change_mode = chmod; 157 158 mode = *argv; 159 if (*mode >= '0' && *mode <= '7') { 160 errno = 0; 161 val = strtol(mode, &ep, 8); 162 if (val > INT_MAX || val < 0) 163 errno = ERANGE; 164 if (errno) 165 err(1, "invalid file mode: %s", mode); 166 if (*ep) 167 errx(1, "invalid file mode: %s", mode); 168 omode = val; 169 oct = 1; 170 } else { 171 if ((set = setmode(mode)) == NULL) 172 errx(1, "invalid file mode: %s", mode); 173 oct = 0; 174 } 175 176 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 177 err(1, NULL); 178 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 179 switch (p->fts_info) { 180 case FTS_D: /* Change it at FTS_DP. */ 181 if (!Rflag) 182 fts_set(ftsp, p, FTS_SKIP); 183 continue; 184 case FTS_DNR: /* Warn, chmod, continue. */ 185 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 186 rval = 1; 187 break; 188 case FTS_ERR: /* Warn, continue. */ 189 case FTS_NS: 190 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 191 rval = 1; 192 continue; 193 case FTS_SL: /* Ignore. */ 194 case FTS_SLNONE: 195 /* 196 * The only symlinks that end up here are ones that 197 * don't point to anything and ones that we found 198 * doing a physical walk. 199 */ 200 if (!hflag) 201 continue; 202 /* else */ 203 /* FALLTHROUGH */ 204 default: 205 break; 206 } 207 newmode = oct ? omode : getmode(set, p->fts_statp->st_mode); 208 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 209 continue; 210 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) { 211 warn("%s", p->fts_path); 212 rval = 1; 213 } else { 214 if (vflag) 215 (void)printf("%s\n", p->fts_accpath); 216 } 217 } 218 if (errno) 219 err(1, "fts_read"); 220 free(set); 221 exit(rval); 222} 223 224void 225usage() 226{ 227 (void)fprintf(stderr, 228 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 229 exit(1); 230} 231