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 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 34 * @(#)chmod.c 8.8 (Berkeley) 4/1/94 35 * $FreeBSD: src/bin/chmod/chmod.c,v 1.16.2.6 2002/10/18 01:36:38 trhodes Exp $ 36 * $DragonFly: src/bin/chmod/chmod.c,v 1.6 2004/08/25 01:15:38 dillon Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 42 #include <err.h> 43 #include <errno.h> 44 #include <fts.h> 45 #include <limits.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 static void usage (void); 52 53 int 54 main(int argc, char **argv) 55 { 56 FTS *ftsp; 57 FTSENT *p; 58 mode_t *set; 59 long val; 60 int oct, omode, newmode; 61 int Hflag, Lflag, Pflag, Rflag, ch, fflag; 62 int fts_options, hflag, rval, vflag; 63 char *ep, *mode; 64 int (*change_mode) (const char *, mode_t); 65 66 set = NULL; 67 omode = 0; 68 Hflag = Lflag = Pflag = Rflag = fflag = hflag = vflag = 0; 69 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 70 switch (ch) { 71 case 'H': 72 Hflag = 1; 73 Lflag = Pflag = 0; 74 break; 75 case 'L': 76 Lflag = 1; 77 Hflag = Pflag = 0; 78 break; 79 case 'P': 80 Pflag = 1; 81 Hflag = Lflag = 0; 82 break; 83 case 'R': 84 Rflag = 1; 85 break; 86 case 'f': 87 fflag = 1; 88 break; 89 case 'h': 90 /* 91 * In System V (and probably POSIX.2) the -h option 92 * causes chmod to change the mode of the symbolic 93 * link. 4.4BSD's symbolic links didn't have modes, 94 * so it was an undocumented noop. In FreeBSD 3.0, 95 * lchmod(2) is introduced and this option does real 96 * work. 97 */ 98 hflag = 1; 99 break; 100 /* 101 * XXX 102 * "-[rwx]" are valid mode commands. If they are the entire 103 * argument, getopt has moved past them, so decrement optind. 104 * Regardless, we're done argument processing. 105 */ 106 case 'g': case 'o': case 'r': case 's': 107 case 't': case 'u': case 'w': case 'X': case 'x': 108 if (argv[optind - 1][0] == '-' && 109 argv[optind - 1][1] == ch && 110 argv[optind - 1][2] == '\0') 111 --optind; 112 goto done; 113 case 'v': 114 vflag = 1; 115 break; 116 case '?': 117 default: 118 usage(); 119 } 120 done: argv += optind; 121 argc -= optind; 122 123 if (argc < 2) 124 usage(); 125 126 fts_options = FTS_PHYSICAL; 127 if (Rflag) { 128 if (hflag) 129 errx(1, 130 "the -R and -h options may not be specified together."); 131 if (Hflag) 132 fts_options |= FTS_COMFOLLOW; 133 if (Lflag) { 134 fts_options &= ~FTS_PHYSICAL; 135 fts_options |= FTS_LOGICAL; 136 } 137 } 138 139 if (hflag) 140 change_mode = lchmod; 141 else 142 change_mode = chmod; 143 144 mode = *argv; 145 if (*mode >= '0' && *mode <= '7') { 146 errno = 0; 147 val = strtol(mode, &ep, 8); 148 if (val > INT_MAX || val < 0) 149 errno = ERANGE; 150 if (errno) 151 err(1, "invalid file mode: %s", mode); 152 if (*ep) 153 errx(1, "invalid file mode: %s", mode); 154 omode = val; 155 oct = 1; 156 } else { 157 if ((set = setmode(mode)) == NULL) 158 errx(1, "invalid file mode: %s", mode); 159 oct = 0; 160 } 161 162 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 163 err(1, NULL); 164 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 165 switch (p->fts_info) { 166 case FTS_D: /* Change it at FTS_DP. */ 167 if (!Rflag) 168 fts_set(ftsp, p, FTS_SKIP); 169 continue; 170 case FTS_DNR: /* Warn, chmod, continue. */ 171 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 172 rval = 1; 173 break; 174 case FTS_ERR: /* Warn, continue. */ 175 case FTS_NS: 176 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 177 rval = 1; 178 continue; 179 case FTS_SL: /* Ignore. */ 180 case FTS_SLNONE: 181 /* 182 * The only symlinks that end up here are ones that 183 * don't point to anything and ones that we found 184 * doing a physical walk. 185 */ 186 if (!hflag) 187 continue; 188 /* else */ 189 /* FALLTHROUGH */ 190 default: 191 break; 192 } 193 newmode = oct ? omode : getmode(set, p->fts_statp->st_mode); 194 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 195 continue; 196 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) { 197 warn("%s", p->fts_path); 198 rval = 1; 199 } else { 200 if (vflag) 201 printf("%s\n", p->fts_accpath); 202 } 203 } 204 if (errno) 205 err(1, "fts_read"); 206 free(set); 207 exit(rval); 208 } 209 210 static void 211 usage(void) 212 { 213 fprintf(stderr, 214 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 215 exit(1); 216 } 217