chmod.c revision 123565
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#if 0 35#ifndef lint 36static char const copyright[] = 37"@(#) Copyright (c) 1989, 1993, 1994\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39#endif /* not lint */ 40 41#ifndef lint 42static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94"; 43#endif /* not lint */ 44#endif 45#include <sys/cdefs.h> 46__FBSDID("$FreeBSD: head/bin/chmod/chmod.c 123565 2003-12-16 15:17:30Z ru $"); 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 int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval; 69 int vflag; 70 char *mode; 71 mode_t newmode; 72 int (*change_mode)(const char *, mode_t); 73 74 set = NULL; 75 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 76 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 77 switch (ch) { 78 case 'H': 79 Hflag = 1; 80 Lflag = 0; 81 break; 82 case 'L': 83 Lflag = 1; 84 Hflag = 0; 85 break; 86 case 'P': 87 Hflag = Lflag = 0; 88 break; 89 case 'R': 90 Rflag = 1; 91 break; 92 case 'f': 93 fflag = 1; 94 break; 95 case 'h': 96 /* 97 * In System V (and probably POSIX.2) the -h option 98 * causes chmod to change the mode of the symbolic 99 * link. 4.4BSD's symbolic links didn't have modes, 100 * so it was an undocumented noop. In FreeBSD 3.0, 101 * lchmod(2) is introduced and this option does real 102 * work. 103 */ 104 hflag = 1; 105 break; 106 /* 107 * XXX 108 * "-[rwx]" are valid mode commands. If they are the entire 109 * argument, getopt has moved past them, so decrement optind. 110 * Regardless, we're done argument processing. 111 */ 112 case 'g': case 'o': case 'r': case 's': 113 case 't': case 'u': case 'w': case 'X': case 'x': 114 if (argv[optind - 1][0] == '-' && 115 argv[optind - 1][1] == ch && 116 argv[optind - 1][2] == '\0') 117 --optind; 118 goto done; 119 case 'v': 120 vflag++; 121 break; 122 case '?': 123 default: 124 usage(); 125 } 126done: argv += optind; 127 argc -= optind; 128 129 if (argc < 2) 130 usage(); 131 132 if (Rflag) { 133 fts_options = FTS_PHYSICAL; 134 if (hflag) 135 errx(1, 136 "the -R and -h options may not be specified together."); 137 if (Hflag) 138 fts_options |= FTS_COMFOLLOW; 139 if (Lflag) { 140 fts_options &= ~FTS_PHYSICAL; 141 fts_options |= FTS_LOGICAL; 142 } 143 } else 144 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 145 146 if (hflag) 147 change_mode = lchmod; 148 else 149 change_mode = chmod; 150 151 mode = *argv; 152 if ((set = setmode(mode)) == NULL) 153 errx(1, "invalid file mode: %s", mode); 154 155 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 156 err(1, "fts_open"); 157 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 158 switch (p->fts_info) { 159 case FTS_D: /* Change it at FTS_DP. */ 160 if (!Rflag) 161 fts_set(ftsp, p, FTS_SKIP); 162 continue; 163 case FTS_DNR: /* Warn, chmod, continue. */ 164 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 165 rval = 1; 166 break; 167 case FTS_ERR: /* Warn, continue. */ 168 case FTS_NS: 169 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 170 rval = 1; 171 continue; 172 case FTS_SL: /* Ignore. */ 173 case FTS_SLNONE: 174 /* 175 * The only symlinks that end up here are ones that 176 * don't point to anything and ones that we found 177 * doing a physical walk. 178 */ 179 if (!hflag) 180 continue; 181 /* else */ 182 /* FALLTHROUGH */ 183 default: 184 break; 185 } 186 newmode = getmode(set, p->fts_statp->st_mode); 187 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 188 continue; 189 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) { 190 warn("%s", p->fts_path); 191 rval = 1; 192 } else { 193 if (vflag) { 194 (void)printf("%s", p->fts_path); 195 196 if (vflag > 1) { 197 char m1[12], m2[12]; 198 199 strmode(p->fts_statp->st_mode, m1); 200 strmode((p->fts_statp->st_mode & 201 S_IFMT) | newmode, m2); 202 203 (void)printf(": 0%o [%s] -> 0%o [%s]", 204 p->fts_statp->st_mode, m1, 205 (p->fts_statp->st_mode & S_IFMT) | 206 newmode, m2); 207 } 208 (void)printf("\n"); 209 } 210 211 } 212 } 213 if (errno) 214 err(1, "fts_read"); 215 free(set); 216 exit(rval); 217} 218 219void 220usage(void) 221{ 222 (void)fprintf(stderr, 223 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 224 exit(1); 225} 226