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: head/bin/chmod/chmod.c 283997 2015-06-04 19:18:58Z pluknet $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/stat.h> 36 37 #include <err.h> 38 #include <errno.h> 39 #include <fcntl.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 void *set; 55 int Hflag, Lflag, Rflag, ch, fflag; 56 int fts_options, hflag, rval, vflag; 57 char *mode; 58 mode_t newmode; 59 60 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0; 61 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 62 switch (ch) { 63 case 'H': 64 Hflag = 1; 65 Lflag = 0; 66 break; 67 case 'L': 68 Lflag = 1; 69 Hflag = 0; 70 break; 71 case 'P': 72 Hflag = Lflag = 0; 73 break; 74 case 'R': 75 Rflag = 1; 76 break; 77 case 'f': 78 fflag = 1; 79 break; 80 case 'h': 81 /* 82 * In System V the -h option causes chmod to change the 83 * mode of the symbolic link. 4.4BSD's symbolic links 84 * didn't have modes, so it was an undocumented noop. 85 * In FreeBSD 3.0, lchmod(2) is introduced and this 86 * option does real work. 87 */ 88 hflag = 1; 89 break; 90 /* 91 * XXX 92 * "-[rwx]" are valid mode commands. If they are the entire 93 * argument, getopt has moved past them, so decrement optind. 94 * Regardless, we're done argument processing. 95 */ 96 case 'g': case 'o': case 'r': case 's': 97 case 't': case 'u': case 'w': case 'X': case 'x': 98 if (argv[optind - 1][0] == '-' && 99 argv[optind - 1][1] == ch && 100 argv[optind - 1][2] == '\0') 101 --optind; 102 goto done; 103 case 'v': 104 vflag++; 105 break; 106 case '?': 107 default: 108 usage(); 109 } 110 done: argv += optind; 111 argc -= optind; 112 113 if (argc < 2) 114 usage(); 115 116 if (Rflag) { 117 if (hflag) 118 errx(1, "the -R and -h options may not be " 119 "specified together."); 120 if (Lflag) { 121 fts_options = FTS_LOGICAL; 122 } else { 123 fts_options = FTS_PHYSICAL; 124 125 if (Hflag) { 126 fts_options |= FTS_COMFOLLOW; 127 } 128 } 129 } else if (hflag) { 130 fts_options = FTS_PHYSICAL; 131 } else { 132 fts_options = FTS_LOGICAL; 133 } 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, "fts_open"); 147 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 148 int atflag; 149 150 if ((fts_options & FTS_LOGICAL) || 151 ((fts_options & FTS_COMFOLLOW) && 152 p->fts_level == FTS_ROOTLEVEL)) 153 atflag = 0; 154 else 155 atflag = AT_SYMLINK_NOFOLLOW; 156 157 switch (p->fts_info) { 158 case FTS_D: 159 if (!Rflag) 160 fts_set(ftsp, p, FTS_SKIP); 161 break; 162 case FTS_DNR: /* Warn, chmod. */ 163 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 164 rval = 1; 165 break; 166 case FTS_DP: /* Already changed at FTS_D. */ 167 continue; 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 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 (fchmodat(AT_FDCWD, p->fts_accpath, newmode, atflag) == -1 180 && !fflag) { 181 warn("%s", p->fts_path); 182 rval = 1; 183 } else if (vflag) { 184 printf("%s", p->fts_path); 185 186 if (vflag > 1) { 187 char m1[12], m2[12]; 188 189 strmode(p->fts_statp->st_mode, m1); 190 strmode((p->fts_statp->st_mode & 191 S_IFMT) | newmode, m2); 192 printf(": 0%o [%s] -> 0%o [%s]", 193 p->fts_statp->st_mode, m1, 194 (p->fts_statp->st_mode & S_IFMT) | 195 newmode, m2); 196 } 197 printf("\n"); 198 } 199 } 200 if (errno) 201 err(1, "fts_read"); 202 exit(rval); 203 } 204 205 static void 206 usage(void) 207 { 208 fprintf(stderr, 209 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 210 exit(1); 211 } 212