chmod.c revision 35773
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 const sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94"; 43#endif 44static const char rcsid[] = 45 "$Id$"; 46#endif /* not lint */ 47 48#include <sys/stat.h> 49 50#include <err.h> 51#include <errno.h> 52#include <fts.h> 53#include <limits.h> 54#include <stdio.h> 55#include <stdlib.h> 56#include <string.h> 57#include <unistd.h> 58 59void usage __P((void)); 60 61int 62main(argc, argv) 63 int argc; 64 char *argv[]; 65{ 66 FTS *ftsp; 67 FTSENT *p; 68 mode_t *set; 69 long val; 70 int oct, omode; 71 int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval; 72 char *ep, *mode; 73 74 set = NULL; 75 omode = 0; 76 Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0; 77 while ((ch = getopt(argc, argv, "HLPRXfgorstuwx")) != -1) 78 switch (ch) { 79 case 'H': 80 Hflag = 1; 81 Lflag = Pflag = 0; 82 break; 83 case 'L': 84 Lflag = 1; 85 Hflag = Pflag = 0; 86 break; 87 case 'P': 88 Pflag = 1; 89 Hflag = Lflag = 0; 90 break; 91 case 'R': 92 Rflag = 1; 93 break; 94 case 'f': /* XXX: undocumented. */ 95 fflag = 1; 96 break; 97 case 'h': 98 /* 99 * In System V (and probably POSIX.2) the -h option 100 * causes chmod to change the mode of the symbolic 101 * link. 4.4BSD's symbolic links don't have modes, 102 * so it's an undocumented noop. Do syntax checking, 103 * though. 104 */ 105 hflag = 1; 106 break; 107 /* 108 * XXX 109 * "-[rwx]" are valid mode commands. If they are the entire 110 * argument, getopt has moved past them, so decrement optind. 111 * Regardless, we're done argument processing. 112 */ 113 case 'g': case 'o': case 'r': case 's': 114 case 't': case 'u': case 'w': case 'X': case 'x': 115 if (argv[optind - 1][0] == '-' && 116 argv[optind - 1][1] == ch && 117 argv[optind - 1][2] == '\0') 118 --optind; 119 goto done; 120 case '?': 121 default: 122 usage(); 123 } 124done: argv += optind; 125 argc -= optind; 126 127 if (argc < 2) 128 usage(); 129 130 fts_options = FTS_PHYSICAL; 131 if (Rflag) { 132 if (hflag) 133 errx(1, 134 "the -R and -h options may not be specified together."); 135 if (Hflag) 136 fts_options |= FTS_COMFOLLOW; 137 if (Lflag) { 138 fts_options &= ~FTS_PHYSICAL; 139 fts_options |= FTS_LOGICAL; 140 } 141 } 142 143 mode = *argv; 144 if (*mode >= '0' && *mode <= '7') { 145 errno = 0; 146 val = strtol(mode, &ep, 8); 147 if (val > INT_MAX || val < 0) 148 errno = ERANGE; 149 if (errno) 150 err(1, "invalid file mode: %s", mode); 151 if (*ep) 152 errx(1, "invalid file mode: %s", mode); 153 omode = val; 154 oct = 1; 155 } else { 156 if ((set = setmode(mode)) == NULL) 157 errx(1, "invalid file mode: %s", mode); 158 oct = 0; 159 } 160 161 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 162 err(1, NULL); 163 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 164 switch (p->fts_info) { 165 case FTS_D: /* Change it at FTS_DP. */ 166 if (!Rflag) 167 fts_set(ftsp, p, FTS_SKIP); 168 continue; 169 case FTS_DNR: /* Warn, chmod, continue. */ 170 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 171 rval = 1; 172 break; 173 case FTS_ERR: /* Warn, continue. */ 174 case FTS_NS: 175 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 176 rval = 1; 177 continue; 178 case FTS_SL: /* Ignore. */ 179 case FTS_SLNONE: 180 /* 181 * The only symlinks that end up here are ones that 182 * don't point to anything and ones that we found 183 * doing a physical walk. 184 */ 185 continue; 186 default: 187 break; 188 } 189 if (chmod(p->fts_accpath, oct ? omode : 190 getmode(set, p->fts_statp->st_mode)) && !fflag) { 191 warn(p->fts_path); 192 rval = 1; 193 } 194 } 195 if (errno) 196 err(1, "fts_read"); 197 exit(rval); 198} 199 200void 201usage() 202{ 203 (void)fprintf(stderr, 204 "usage: chmod [-R [-H | -L | -P]] mode file ...\n"); 205 exit(1); 206} 207