chmod.c revision 110057
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 110057 2003-01-29 21:46:12Z mux $"); 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 60void usage(void); 61 62int 63main(int argc, char *argv[]) 64{ 65 FTS *ftsp; 66 FTSENT *p; 67 mode_t *set; 68 long val; 69 int oct; 70 int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval; 71 int vflag; 72 char *ep, *mode; 73 mode_t newmode, omode; 74 int (*change_mode)(const char *, mode_t); 75 76 set = NULL; 77 omode = 0; 78 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 79 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 80 switch (ch) { 81 case 'H': 82 Hflag = 1; 83 Lflag = 0; 84 break; 85 case 'L': 86 Lflag = 1; 87 Hflag = 0; 88 break; 89 case 'P': 90 Hflag = Lflag = 0; 91 break; 92 case 'R': 93 Rflag = 1; 94 break; 95 case 'f': 96 fflag = 1; 97 break; 98 case 'h': 99 /* 100 * In System V (and probably POSIX.2) the -h option 101 * causes chmod to change the mode of the symbolic 102 * link. 4.4BSD's symbolic links didn't have modes, 103 * so it was an undocumented noop. In FreeBSD 3.0, 104 * lchmod(2) is introduced and this option does real 105 * work. 106 */ 107 hflag = 1; 108 break; 109 /* 110 * XXX 111 * "-[rwx]" are valid mode commands. If they are the entire 112 * argument, getopt has moved past them, so decrement optind. 113 * Regardless, we're done argument processing. 114 */ 115 case 'g': case 'o': case 'r': case 's': 116 case 't': case 'u': case 'w': case 'X': case 'x': 117 if (argv[optind - 1][0] == '-' && 118 argv[optind - 1][1] == ch && 119 argv[optind - 1][2] == '\0') 120 --optind; 121 goto done; 122 case 'v': 123 vflag++; 124 break; 125 case '?': 126 default: 127 usage(); 128 } 129done: argv += optind; 130 argc -= optind; 131 132 if (argc < 2) 133 usage(); 134 135 if (Rflag) { 136 fts_options = FTS_PHYSICAL; 137 if (hflag) 138 errx(1, 139 "the -R and -h options may not be specified together."); 140 if (Hflag) 141 fts_options |= FTS_COMFOLLOW; 142 if (Lflag) { 143 fts_options &= ~FTS_PHYSICAL; 144 fts_options |= FTS_LOGICAL; 145 } 146 } else 147 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 148 149 if (hflag) 150 change_mode = lchmod; 151 else 152 change_mode = chmod; 153 154 mode = *argv; 155 if (*mode >= '0' && *mode <= '7') { 156 errno = 0; 157 val = strtol(mode, &ep, 8); 158 if (val > USHRT_MAX || val < 0) 159 errno = ERANGE; 160 if (errno) 161 err(1, "invalid file mode: %s", mode); 162 if (*ep) 163 errx(1, "invalid file mode: %s", mode); 164 omode = (mode_t)val; 165 oct = 1; 166 } else { 167 if ((set = setmode(mode)) == NULL) 168 errx(1, "invalid file mode: %s", mode); 169 oct = 0; 170 } 171 172 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 173 err(1, "fts_open"); 174 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 175 switch (p->fts_info) { 176 case FTS_D: /* Change it at FTS_DP. */ 177 if (!Rflag) 178 fts_set(ftsp, p, FTS_SKIP); 179 continue; 180 case FTS_DNR: /* Warn, chmod, continue. */ 181 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 182 rval = 1; 183 break; 184 case FTS_ERR: /* Warn, continue. */ 185 case FTS_NS: 186 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 187 rval = 1; 188 continue; 189 case FTS_SL: /* Ignore. */ 190 case FTS_SLNONE: 191 /* 192 * The only symlinks that end up here are ones that 193 * don't point to anything and ones that we found 194 * doing a physical walk. 195 */ 196 if (!hflag) 197 continue; 198 /* else */ 199 /* FALLTHROUGH */ 200 default: 201 break; 202 } 203 newmode = oct ? omode : getmode(set, p->fts_statp->st_mode); 204 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 205 continue; 206 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) { 207 warn("%s", p->fts_path); 208 rval = 1; 209 } else { 210 if (vflag) { 211 (void)printf("%s", p->fts_accpath); 212 213 if (vflag > 1) { 214 char m1[12], m2[12]; 215 216 strmode(p->fts_statp->st_mode, m1); 217 strmode((p->fts_statp->st_mode & 218 S_IFMT) | newmode, m2); 219 220 (void)printf(": 0%o [%s] -> 0%o [%s]", 221 p->fts_statp->st_mode, m1, 222 (p->fts_statp->st_mode & S_IFMT) | 223 newmode, m2); 224 } 225 (void)printf("\n"); 226 } 227 228 } 229 } 230 if (errno) 231 err(1, "fts_read"); 232 free(set); 233 exit(rval); 234} 235 236void 237usage(void) 238{ 239 (void)fprintf(stderr, 240 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 241 exit(1); 242} 243