chmod.c revision 1556
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 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 41static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94"; 42#endif /* not lint */ 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 <stdio.h> 51#include <stdlib.h> 52#include <string.h> 53#include <unistd.h> 54 55void usage __P((void)); 56 57int 58main(argc, argv) 59 int argc; 60 char *argv[]; 61{ 62 FTS *ftsp; 63 FTSENT *p; 64 mode_t *set; 65 long val; 66 int oct, omode; 67 int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval; 68 char *ep, *mode; 69 70 Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0; 71 while ((ch = getopt(argc, argv, "HLPRXfgorstuwx")) != EOF) 72 switch (ch) { 73 case 'H': 74 Hflag = 1; 75 Lflag = Pflag = 0; 76 break; 77 case 'L': 78 Lflag = 1; 79 Hflag = Pflag = 0; 80 break; 81 case 'P': 82 Pflag = 1; 83 Hflag = Lflag = 0; 84 break; 85 case 'R': 86 Rflag = 1; 87 break; 88 case 'f': /* XXX: undocumented. */ 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 don't have modes, 96 * so it's an undocumented noop. Do syntax checking, 97 * though. 98 */ 99 hflag = 1; 100 break; 101 /* 102 * XXX 103 * "-[rwx]" are valid mode commands. If they are the entire 104 * argument, getopt has moved past them, so decrement optind. 105 * Regardless, we're done argument processing. 106 */ 107 case 'g': case 'o': case 'r': case 's': 108 case 't': case 'u': case 'w': case 'X': case 'x': 109 if (argv[optind - 1][0] == '-' && 110 argv[optind - 1][1] == ch && 111 argv[optind - 1][2] == '\0') 112 --optind; 113 goto done; 114 case '?': 115 default: 116 usage(); 117 } 118done: argv += optind; 119 argc -= optind; 120 121 if (argc < 2) 122 usage(); 123 124 fts_options = FTS_PHYSICAL; 125 if (Rflag) { 126 if (hflag) 127 errx(1, 128 "the -R and -h options may not be specified together."); 129 if (Hflag) 130 fts_options |= FTS_COMFOLLOW; 131 if (Lflag) { 132 fts_options &= ~FTS_PHYSICAL; 133 fts_options |= FTS_LOGICAL; 134 } 135 } 136 137 mode = *argv; 138 if (*mode >= '0' && *mode <= '7') { 139 errno = 0; 140 val = strtol(mode, &ep, 8); 141 if (val > INT_MAX || val < 0) 142 errno = ERANGE; 143 if (errno) 144 err(1, "invalid file mode: %s", mode); 145 if (*ep) 146 errx(1, "invalid file mode: %s", mode); 147 omode = val; 148 oct = 1; 149 } else { 150 if ((set = setmode(mode)) == NULL) 151 errx(1, "invalid file mode: %s", mode); 152 oct = 0; 153 } 154 155 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 156 err(1, NULL); 157 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 158 switch (p->fts_info) { 159 case FTS_D: 160 if (Rflag) /* Change it at FTS_DP. */ 161 continue; 162 fts_set(ftsp, p, FTS_SKIP); 163 break; 164 case FTS_DNR: /* Warn, chmod, continue. */ 165 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 166 rval = 1; 167 break; 168 case FTS_ERR: /* Warn, continue. */ 169 case FTS_NS: 170 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 171 rval = 1; 172 continue; 173 case FTS_SL: /* Ignore. */ 174 case FTS_SLNONE: 175 /* 176 * The only symlinks that end up here are ones that 177 * don't point to anything and ones that we found 178 * doing a physical walk. 179 */ 180 continue; 181 default: 182 break; 183 } 184 if (chmod(p->fts_accpath, oct ? omode : 185 getmode(set, p->fts_statp->st_mode)) && !fflag) { 186 warn(p->fts_path); 187 rval = 1; 188 } 189 } 190 if (errno) 191 err(1, "fts_read"); 192 exit(rval); 193} 194 195void 196usage() 197{ 198 (void)fprintf(stderr, 199 "usage: chmod [-R [-H | -L | -P]] mode file ...\n"); 200 exit(1); 201} 202