chmod.c revision 77333
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 77333 2001-05-28 12:58:10Z 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 78 set = NULL; 79 omode = 0; 80 Hflag = Lflag = Pflag = Rflag = fflag = hflag = vflag = 0; 81 while ((ch = getopt(argc, argv, "HLPRXfgorstuvwx")) != -1) 82 switch (ch) { 83 case 'H': 84 Hflag = 1; 85 Lflag = Pflag = 0; 86 break; 87 case 'L': 88 Lflag = 1; 89 Hflag = Pflag = 0; 90 break; 91 case 'P': 92 Pflag = 1; 93 Hflag = Lflag = 0; 94 break; 95 case 'R': 96 Rflag = 1; 97 break; 98 case 'f': 99 fflag = 1; 100 break; 101 case 'h': 102 /* 103 * In System V (and probably POSIX.2) the -h option 104 * causes chmod to change the mode of the symbolic 105 * link. 4.4BSD's symbolic links don't have modes, 106 * so it's an undocumented noop. Do syntax checking, 107 * though. 108 */ 109 hflag = 1; 110 break; 111 /* 112 * XXX 113 * "-[rwx]" are valid mode commands. If they are the entire 114 * argument, getopt has moved past them, so decrement optind. 115 * Regardless, we're done argument processing. 116 */ 117 case 'g': case 'o': case 'r': case 's': 118 case 't': case 'u': case 'w': case 'X': case 'x': 119 if (argv[optind - 1][0] == '-' && 120 argv[optind - 1][1] == ch && 121 argv[optind - 1][2] == '\0') 122 --optind; 123 goto done; 124 case 'v': 125 vflag = 1; 126 break; 127 case '?': 128 default: 129 usage(); 130 } 131done: argv += optind; 132 argc -= optind; 133 134 if (argc < 2) 135 usage(); 136 137 if (Rflag) { 138 fts_options = FTS_PHYSICAL; 139 if (hflag) 140 errx(1, 141 "the -R and -h options may not be specified together."); 142 if (Hflag) 143 fts_options |= FTS_COMFOLLOW; 144 if (Lflag) { 145 fts_options &= ~FTS_PHYSICAL; 146 fts_options |= FTS_LOGICAL; 147 } 148 } else 149 fts_options = FTS_LOGICAL; 150 151 mode = *argv; 152 if (*mode >= '0' && *mode <= '7') { 153 errno = 0; 154 val = strtol(mode, &ep, 8); 155 if (val > INT_MAX || val < 0) 156 errno = ERANGE; 157 if (errno) 158 err(1, "invalid file mode: %s", mode); 159 if (*ep) 160 errx(1, "invalid file mode: %s", mode); 161 omode = val; 162 oct = 1; 163 } else { 164 if ((set = setmode(mode)) == NULL) 165 errx(1, "invalid file mode: %s", mode); 166 oct = 0; 167 } 168 169 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 170 err(1, NULL); 171 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 172 switch (p->fts_info) { 173 case FTS_D: /* Change it at FTS_DP. */ 174 if (!Rflag) 175 fts_set(ftsp, p, FTS_SKIP); 176 continue; 177 case FTS_DNR: /* Warn, chmod, continue. */ 178 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 179 rval = 1; 180 break; 181 case FTS_ERR: /* Warn, continue. */ 182 case FTS_NS: 183 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 184 rval = 1; 185 continue; 186 case FTS_SL: /* Ignore. */ 187 case FTS_SLNONE: 188 /* 189 * The only symlinks that end up here are ones that 190 * don't point to anything and ones that we found 191 * doing a physical walk. 192 */ 193 continue; 194 default: 195 break; 196 } 197 newmode = oct ? omode : getmode(set, p->fts_statp->st_mode); 198 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 199 continue; 200 if (chmod(p->fts_accpath, newmode) && !fflag) { 201 warn("%s", p->fts_path); 202 rval = 1; 203 } else { 204 if (vflag) 205 (void)printf("%s\n", p->fts_accpath); 206 } 207 } 208 if (errno) 209 err(1, "fts_read"); 210 free(set); 211 exit(rval); 212} 213 214void 215usage() 216{ 217 (void)fprintf(stderr, 218 "usage: chmod [-fv] [-R [-H | -L | -P]] mode file ...\n"); 219 exit(1); 220} 221