chmod.c revision 99109
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 44#endif /* not lint */ 45#include <sys/cdefs.h> 46__FBSDID("$FreeBSD: head/bin/chmod/chmod.c 99109 2002-06-30 05:13:54Z obrien $"); 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(int, char *[]); 61void usage(void); 62 63int 64main(int argc, char *argv[]) 65{ 66 FTS *ftsp; 67 FTSENT *p; 68 mode_t *set; 69 long val; 70 int oct; 71 int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval; 72 int vflag; 73 char *ep, *mode; 74 mode_t newmode, omode; 75 int (*change_mode)(const char *, mode_t); 76 77 set = NULL; 78 omode = 0; 79 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 80 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 81 switch (ch) { 82 case 'H': 83 Hflag = 1; 84 Lflag = 0; 85 break; 86 case 'L': 87 Lflag = 1; 88 Hflag = 0; 89 break; 90 case 'P': 91 Hflag = Lflag = 0; 92 break; 93 case 'R': 94 Rflag = 1; 95 break; 96 case 'f': 97 fflag = 1; 98 break; 99 case 'h': 100 /* 101 * In System V (and probably POSIX.2) the -h option 102 * causes chmod to change the mode of the symbolic 103 * link. 4.4BSD's symbolic links didn't have modes, 104 * so it was an undocumented noop. In FreeBSD 3.0, 105 * lchmod(2) is introduced and this option does real 106 * work. 107 */ 108 hflag = 1; 109 break; 110 /* 111 * XXX 112 * "-[rwx]" are valid mode commands. If they are the entire 113 * argument, getopt has moved past them, so decrement optind. 114 * Regardless, we're done argument processing. 115 */ 116 case 'g': case 'o': case 'r': case 's': 117 case 't': case 'u': case 'w': case 'X': case 'x': 118 if (argv[optind - 1][0] == '-' && 119 argv[optind - 1][1] == ch && 120 argv[optind - 1][2] == '\0') 121 --optind; 122 goto done; 123 case 'v': 124 vflag = 1; 125 break; 126 case '?': 127 default: 128 usage(); 129 } 130done: argv += optind; 131 argc -= optind; 132 133 if (argc < 2) 134 usage(); 135 136 if (Rflag) { 137 fts_options = FTS_PHYSICAL; 138 if (hflag) 139 errx(1, 140 "the -R and -h options may not be specified together."); 141 if (Hflag) 142 fts_options |= FTS_COMFOLLOW; 143 if (Lflag) { 144 fts_options &= ~FTS_PHYSICAL; 145 fts_options |= FTS_LOGICAL; 146 } 147 } else 148 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 149 150 if (hflag) 151 change_mode = lchmod; 152 else 153 change_mode = chmod; 154 155 mode = *argv; 156 if (*mode >= '0' && *mode <= '7') { 157 errno = 0; 158 val = strtol(mode, &ep, 8); 159 if (val > USHRT_MAX || val < 0) 160 errno = ERANGE; 161 if (errno) 162 err(1, "invalid file mode: %s", mode); 163 if (*ep) 164 errx(1, "invalid file mode: %s", mode); 165 omode = (mode_t)val; 166 oct = 1; 167 } else { 168 if ((set = setmode(mode)) == NULL) 169 errx(1, "invalid file mode: %s", mode); 170 oct = 0; 171 } 172 173 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 174 err(1, NULL); 175 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 176 switch (p->fts_info) { 177 case FTS_D: /* Change it at FTS_DP. */ 178 if (!Rflag) 179 fts_set(ftsp, p, FTS_SKIP); 180 continue; 181 case FTS_DNR: /* Warn, chmod, continue. */ 182 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 183 rval = 1; 184 break; 185 case FTS_ERR: /* Warn, continue. */ 186 case FTS_NS: 187 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 188 rval = 1; 189 continue; 190 case FTS_SL: /* Ignore. */ 191 case FTS_SLNONE: 192 /* 193 * The only symlinks that end up here are ones that 194 * don't point to anything and ones that we found 195 * doing a physical walk. 196 */ 197 if (!hflag) 198 continue; 199 /* else */ 200 /* FALLTHROUGH */ 201 default: 202 break; 203 } 204 newmode = oct ? omode : getmode(set, p->fts_statp->st_mode); 205 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 206 continue; 207 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) { 208 warn("%s", p->fts_path); 209 rval = 1; 210 } else { 211 if (vflag) 212 (void)printf("%s\n", p->fts_accpath); 213 } 214 } 215 if (errno) 216 err(1, "fts_read"); 217 free(set); 218 exit(rval); 219} 220 221void 222usage(void) 223{ 224 (void)fprintf(stderr, 225 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 226 exit(1); 227} 228