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. 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 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)chmod.c 8.8 (Berkeley) 4/1/94 31 * $FreeBSD: src/bin/chmod/chmod.c,v 1.16.2.6 2002/10/18 01:36:38 trhodes Exp $ 32 * $DragonFly: src/bin/chmod/chmod.c,v 1.9 2008/09/02 22:13:11 swildner Exp $ 33 */ 34 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 38 #include <err.h> 39 #include <errno.h> 40 #include <fts.h> 41 #include <limits.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 static void usage (void); 48 49 int 50 main(int argc, char **argv) 51 { 52 FTS *ftsp; 53 FTSENT *p; 54 mode_t newmode; 55 void *set; 56 int Hflag, Lflag, Rflag, ch, fflag; 57 int fts_options, hflag, rval, vflag; 58 char *mode; 59 int (*change_mode) (const char *, mode_t); 60 61 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 62 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 63 switch (ch) { 64 case 'H': 65 Hflag = 1; 66 Lflag = 0; 67 break; 68 case 'L': 69 Lflag = 1; 70 Hflag = 0; 71 break; 72 case 'P': 73 Hflag = Lflag = 0; 74 break; 75 case 'R': 76 Rflag = 1; 77 break; 78 case 'f': 79 fflag = 1; 80 break; 81 case 'h': 82 /* 83 * In System V (and probably POSIX.2) the -h option 84 * causes chmod to change the mode of the symbolic 85 * link. 4.4BSD's symbolic links didn't have modes, 86 * so it was an undocumented noop. In FreeBSD 3.0, 87 * lchmod(2) is introduced and this option does real 88 * work. 89 */ 90 hflag = 1; 91 break; 92 /* 93 * XXX 94 * "-[rwx]" are valid mode commands. If they are the entire 95 * argument, getopt has moved past them, so decrement optind. 96 * Regardless, we're done argument processing. 97 */ 98 case 'g': case 'o': case 'r': case 's': 99 case 't': case 'u': case 'w': case 'X': case 'x': 100 if (argv[optind - 1][0] == '-' && 101 argv[optind - 1][1] == ch && 102 argv[optind - 1][2] == '\0') 103 --optind; 104 goto done; 105 case 'v': 106 vflag = 1; 107 break; 108 default: 109 usage(); 110 } 111 done: argv += optind; 112 argc -= optind; 113 114 if (argc < 2) 115 usage(); 116 117 fts_options = FTS_PHYSICAL; 118 if (Rflag) { 119 if (hflag) 120 errx(1, 121 "the -R and -h options may not be specified together."); 122 if (Hflag) 123 fts_options |= FTS_COMFOLLOW; 124 if (Lflag) { 125 fts_options &= ~FTS_PHYSICAL; 126 fts_options |= FTS_LOGICAL; 127 } 128 } 129 130 if (hflag) 131 change_mode = lchmod; 132 else 133 change_mode = chmod; 134 135 mode = *argv; 136 errno = 0; 137 if ((set = setmode(mode)) == NULL) { 138 if (!errno) 139 errx(1, "invalid file mode: %s", mode); 140 else 141 /* malloc for setmode() failed */ 142 err(1, "setmode failed"); 143 } 144 145 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 146 err(1, NULL); 147 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 148 switch (p->fts_info) { 149 case FTS_D: /* Change it at FTS_DP. */ 150 if (!Rflag) 151 fts_set(ftsp, p, FTS_SKIP); 152 continue; 153 case FTS_DNR: /* Warn, chmod, continue. */ 154 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 155 rval = 1; 156 break; 157 case FTS_ERR: /* Warn, continue. */ 158 case FTS_NS: 159 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 160 rval = 1; 161 continue; 162 case FTS_SL: /* Ignore. */ 163 case FTS_SLNONE: 164 /* 165 * The only symlinks that end up here are ones that 166 * don't point to anything and ones that we found 167 * doing a physical walk. 168 */ 169 if (!hflag) 170 continue; 171 /* else */ 172 /* FALLTHROUGH */ 173 default: 174 break; 175 } 176 newmode = getmode(set, p->fts_statp->st_mode); 177 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 178 continue; 179 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) { 180 warn("%s", p->fts_path); 181 rval = 1; 182 } else { 183 if (vflag) 184 printf("%s\n", p->fts_accpath); 185 } 186 } 187 if (errno) 188 err(1, "fts_read"); 189 free(set); 190 exit(rval); 191 } 192 193 static void 194 usage(void) 195 { 196 fprintf(stderr, 197 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 198 exit(1); 199 } 200