chmod.c revision 1.11
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 35 static 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 41 /*static char sccsid[] = "from: @(#)chmod.c 8.8 (Berkeley) 4/1/94";*/ 42 static char *rcsid = "$Id: chmod.c,v 1.11 1995/01/15 05:50:26 mycroft Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/stat.h> 47 48 #include <err.h> 49 #include <errno.h> 50 #include <fts.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 #include <limits.h> 56 57 void usage __P((void)); 58 59 int 60 main(argc, argv) 61 int argc; 62 char *argv[]; 63 { 64 FTS *ftsp; 65 FTSENT *p; 66 mode_t *set; 67 long val; 68 int oct, omode; 69 int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval; 70 char *ep, *mode; 71 72 Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0; 73 while ((ch = getopt(argc, argv, "HLPRXfgorstuwx")) != -1) 74 switch (ch) { 75 case 'H': 76 Hflag = 1; 77 Lflag = Pflag = 0; 78 break; 79 case 'L': 80 Lflag = 1; 81 Hflag = Pflag = 0; 82 break; 83 case 'P': 84 Pflag = 1; 85 Hflag = Lflag = 0; 86 break; 87 case 'R': 88 Rflag = 1; 89 break; 90 case 'f': /* XXX: undocumented. */ 91 fflag = 1; 92 break; 93 case 'h': 94 /* 95 * In System V (and probably POSIX.2) the -h option 96 * causes chmod to change the mode of the symbolic 97 * link. 4.4BSD's symbolic links don't have modes, 98 * so it's an undocumented noop. Do syntax checking, 99 * though. 100 */ 101 hflag = 1; 102 break; 103 /* 104 * XXX 105 * "-[rwx]" are valid mode commands. If they are the entire 106 * argument, getopt has moved past them, so decrement optind. 107 * Regardless, we're done argument processing. 108 */ 109 case 'g': case 'o': case 'r': case 's': 110 case 't': case 'u': case 'w': case 'X': case 'x': 111 if (argv[optind - 1][0] == '-' && 112 argv[optind - 1][1] == ch && 113 argv[optind - 1][2] == '\0') 114 --optind; 115 goto done; 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 mode = *argv; 140 if (*mode >= '0' && *mode <= '7') { 141 errno = 0; 142 val = strtol(mode, &ep, 8); 143 if (val > INT_MAX || val < 0) 144 errno = ERANGE; 145 if (errno) 146 err(1, "invalid file mode: %s", mode); 147 if (*ep) 148 errx(1, "invalid file mode: %s", mode); 149 omode = val; 150 oct = 1; 151 } else { 152 if ((set = setmode(mode)) == NULL) 153 errx(1, "invalid file mode: %s", mode); 154 oct = 0; 155 } 156 157 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 158 err(1, NULL); 159 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 160 switch (p->fts_info) { 161 case FTS_D: 162 if (!Rflag) 163 fts_set(ftsp, p, FTS_SKIP); 164 break; 165 case FTS_DNR: /* Warn, chmod, continue. */ 166 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 167 rval = 1; 168 break; 169 case FTS_DP: /* Already changed at FTS_D. */ 170 continue; 171 case FTS_ERR: /* Warn, continue. */ 172 case FTS_NS: 173 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 174 rval = 1; 175 continue; 176 case FTS_SL: /* Ignore. */ 177 case FTS_SLNONE: 178 /* 179 * The only symlinks that end up here are ones that 180 * don't point to anything and ones that we found 181 * doing a physical walk. 182 */ 183 continue; 184 default: 185 break; 186 } 187 if (chmod(p->fts_accpath, oct ? omode : 188 getmode(set, p->fts_statp->st_mode)) && !fflag) { 189 warn(p->fts_path); 190 rval = 1; 191 } 192 } 193 if (errno) 194 err(1, "fts_read"); 195 exit(rval); 196 } 197 198 void 199 usage() 200 { 201 (void)fprintf(stderr, 202 "usage: chmod [-R [-H | -L | -P]] mode file ...\n"); 203 exit(1); 204 } 205
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