chmod.c revision 194795
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if 0 31#ifndef lint 32static char const copyright[] = 33"@(#) Copyright (c) 1989, 1993, 1994\n\ 34 The Regents of the University of California. All rights reserved.\n"; 35#endif /* not lint */ 36 37#ifndef lint 38static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94"; 39#endif /* not lint */ 40#endif 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: head/bin/chmod/chmod.c 194795 2009-06-23 23:30:56Z delphij $"); 43 44#include <sys/types.h> 45#include <sys/stat.h> 46 47#include <err.h> 48#include <errno.h> 49#include <fts.h> 50#include <limits.h> 51#include <stdio.h> 52#include <stdlib.h> 53#include <string.h> 54#include <unistd.h> 55 56static void usage(void); 57 58int 59main(int argc, char *argv[]) 60{ 61 FTS *ftsp; 62 FTSENT *p; 63 mode_t *set; 64 int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval; 65 int vflag; 66 char *mode; 67 mode_t newmode; 68 int (*change_mode)(const char *, mode_t); 69 70 set = NULL; 71 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 72 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 73 switch (ch) { 74 case 'H': 75 Hflag = 1; 76 Lflag = 0; 77 break; 78 case 'L': 79 Lflag = 1; 80 Hflag = 0; 81 break; 82 case 'P': 83 Hflag = Lflag = 0; 84 break; 85 case 'R': 86 Rflag = 1; 87 break; 88 case 'f': 89 fflag = 1; 90 break; 91 case 'h': 92 /* 93 * In System V (and probably POSIX.2) the -h option 94 * causes chmod to change the mode of the symbolic 95 * link. 4.4BSD's symbolic links didn't have modes, 96 * so it was an undocumented noop. In FreeBSD 3.0, 97 * lchmod(2) is introduced and this option does real 98 * work. 99 */ 100 hflag = 1; 101 break; 102 /* 103 * XXX 104 * "-[rwx]" are valid mode commands. If they are the entire 105 * argument, getopt has moved past them, so decrement optind. 106 * Regardless, we're done argument processing. 107 */ 108 case 'g': case 'o': case 'r': case 's': 109 case 't': case 'u': case 'w': case 'X': case 'x': 110 if (argv[optind - 1][0] == '-' && 111 argv[optind - 1][1] == ch && 112 argv[optind - 1][2] == '\0') 113 --optind; 114 goto done; 115 case 'v': 116 vflag++; 117 break; 118 case '?': 119 default: 120 usage(); 121 } 122done: argv += optind; 123 argc -= optind; 124 125 if (argc < 2) 126 usage(); 127 128 if (Rflag) { 129 fts_options = FTS_PHYSICAL; 130 if (hflag) 131 errx(1, 132 "the -R and -h options may not be specified together."); 133 if (Hflag) 134 fts_options |= FTS_COMFOLLOW; 135 if (Lflag) { 136 fts_options &= ~FTS_PHYSICAL; 137 fts_options |= FTS_LOGICAL; 138 } 139 } else 140 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 141 142 if (hflag) 143 change_mode = lchmod; 144 else 145 change_mode = chmod; 146 147 mode = *argv; 148 if ((set = setmode(mode)) == NULL) 149 errx(1, "invalid file mode: %s", mode); 150 151 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 152 err(1, "fts_open"); 153 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 154 switch (p->fts_info) { 155 case FTS_D: /* Change it at FTS_DP. */ 156 if (!Rflag) 157 fts_set(ftsp, p, FTS_SKIP); 158 continue; 159 case FTS_DNR: /* Warn, chmod, continue. */ 160 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 161 rval = 1; 162 break; 163 case FTS_ERR: /* Warn, continue. */ 164 case FTS_NS: 165 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 166 rval = 1; 167 continue; 168 case FTS_SL: /* Ignore. */ 169 case FTS_SLNONE: 170 /* 171 * The only symlinks that end up here are ones that 172 * don't point to anything and ones that we found 173 * doing a physical walk. 174 */ 175 if (!hflag) 176 continue; 177 /* else */ 178 /* FALLTHROUGH */ 179 default: 180 break; 181 } 182 newmode = getmode(set, p->fts_statp->st_mode); 183 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 184 continue; 185 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) { 186 warn("%s", p->fts_path); 187 rval = 1; 188 } else { 189 if (vflag) { 190 (void)printf("%s", p->fts_path); 191 192 if (vflag > 1) { 193 char m1[12], m2[12]; 194 195 strmode(p->fts_statp->st_mode, m1); 196 strmode((p->fts_statp->st_mode & 197 S_IFMT) | newmode, m2); 198 199 (void)printf(": 0%o [%s] -> 0%o [%s]", 200 p->fts_statp->st_mode, m1, 201 (p->fts_statp->st_mode & S_IFMT) | 202 newmode, m2); 203 } 204 (void)printf("\n"); 205 } 206 207 } 208 } 209 if (errno) 210 err(1, "fts_read"); 211 free(set); 212 exit(rval); 213} 214 215static void 216usage(void) 217{ 218 (void)fprintf(stderr, 219 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 220 exit(1); 221} 222