bin/mkdir/mkdir.c

   1 /* $NetBSD: mkdir.c,v 1.37 2008/07/20 00:52:40 lukem Exp $ */
   2
   3 /*
   4  * Copyright (c) 1983, 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1983, 1992, 1993\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)mkdir.c     8.2 (Berkeley) 1/25/94";
  41 #else
  42 __RCSID("$NetBSD: mkdir.c,v 1.37 2008/07/20 00:52:40 lukem Exp $");
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <sys/param.h>
  47 #include <sys/stat.h>
  48 #include <sys/types.h>
  49
  50 #include <err.h>
  51 #include <errno.h>
  52 #include <locale.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <unistd.h>
  57
  58 int     mkpath(char *, mode_t, mode_t);
  59 void    usage(void);
  60 int     main(int, char *[]);
  61
  62 int
  63 main(int argc, char *argv[])
  64 {
  65         int ch, exitval, pflag;
  66         void *set;
  67         mode_t mode, dir_mode;
  68
  69         setprogname(argv[0]);
  70         (void)setlocale(LC_ALL, "");
  71
  72         /*
  73          * The default file mode is a=rwx (0777) with selected permissions
  74          * removed in accordance with the file mode creation mask.  For
  75          * intermediate path name components, the mode is the default modified
  76          * by u+wx so that the subdirectories can always be created.
  77          */
  78         mode = (S_IRWXU | S_IRWXG | S_IRWXO) & ~umask(0);
  79         dir_mode = mode | S_IWUSR | S_IXUSR;
  80
  81         pflag = 0;
  82         while ((ch = getopt(argc, argv, "m:p")) != -1)
  83                 switch (ch) {
  84                 case 'p':
  85                         pflag = 1;
  86                         break;
  87                 case 'm':
  88                         if ((set = setmode(optarg)) == NULL) {
  89                                 err(EXIT_FAILURE, "Cannot set file mode `%s'",
  90                                     optarg);
  91                                 /* NOTREACHED */
  92                         }
  93                         mode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
  94                         free(set);
  95                         break;
  96                 case '?':
  97                 default:
  98                         usage();
  99                         /* NOTREACHED */
 100                 }
 101         argc -= optind;
 102         argv += optind;
 103
 104         if (*argv == NULL) {
 105                 usage();
 106                 /* NOTREACHED */
 107         }
 108
 109         for (exitval = EXIT_SUCCESS; *argv != NULL; ++argv) {
 110 #ifdef notdef
 111                 char *slash;
 112
 113                 /* Kernel takes care of this */
 114                 /* Remove trailing slashes, per POSIX. */
 115                 slash = strrchr(*argv, '\0');
 116                 while (--slash > *argv && *slash == '/')
 117                         *slash = '\0';
 118 #endif
 119
 120                 if (pflag) {
 121                         if (mkpath(*argv, mode, dir_mode) < 0)
 122                                 exitval = EXIT_FAILURE;
 123                 } else {
 124                         if (mkdir(*argv, mode) < 0) {
 125                                 warn("%s", *argv);
 126                                 exitval = EXIT_FAILURE;
 127                         } else {
 128                                 /*
 129                                  * The mkdir() and umask() calls both honor
 130                                  * only the file permission bits, so if you try
 131                                  * to set a mode including the sticky, setuid,
 132                                  * setgid bits you lose them. So chmod().
 133                                  */
 134                                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) != 0 &&
 135                                     chmod(*argv, mode) == -1) {
 136                                         warn("%s", *argv);
 137                                         exitval = EXIT_FAILURE;
 138                                 }
 139                         }
 140                 }
 141         }
 142         exit(exitval);
 143         /* NOTREACHED */
 144 }
 145
 146 /*
 147  * mkpath -- create directories.
 148  *      path     - path
 149  *      mode     - file mode of terminal directory
 150  *      dir_mode - file mode of intermediate directories
 151  */
 152 int
 153 mkpath(char *path, mode_t mode, mode_t dir_mode)
 154 {
 155         struct stat sb;
 156         char *slash;
 157         int done, rv;
 158
 159         done = 0;
 160         slash = path;
 161
 162         for (;;) {
 163                 slash += strspn(slash, "/");
 164                 slash += strcspn(slash, "/");
 165
 166                 done = (*slash == '\0');
 167                 *slash = '\0';
 168
 169                 rv = mkdir(path, done ? mode : dir_mode);
 170                 if (rv < 0) {
 171                         /*
 172                          * Can't create; path exists or no perms.
 173                          * stat() path to determine what's there now.
 174                          */
 175                         int     sverrno;
 176
 177                         sverrno = errno;
 178                         if (stat(path, &sb) < 0) {
 179                                         /* Not there; use mkdir()s error */
 180                                 errno = sverrno;
 181                                 warn("%s", path);
 182                                 return -1;
 183                         }
 184                         if (!S_ISDIR(sb.st_mode)) {
 185                                         /* Is there, but isn't a directory */
 186                                 errno = ENOTDIR;
 187                                 warn("%s", path);
 188                                 return -1;
 189                         }
 190                 } else if (done) {
 191                         /*
 192                          * Created ok, and this is the last element
 193                          */
 194                         /*
 195                          * The mkdir() and umask() calls both honor only the
 196                          * file permission bits, so if you try to set a mode
 197                          * including the sticky, setuid, setgid bits you lose
 198                          * them. So chmod().
 199                          */
 200                         if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) != 0 &&
 201                             chmod(path, mode) == -1) {
 202                                 warn("%s", path);
 203                                 return -1;
 204                         }
 205                 }
 206
 207                 if (done) {
 208                         break;
 209                 }
 210                 *slash = '/';
 211         }
 212
 213         return 0;
 214 }
 215
 216 void
 217 usage(void)
 218 {
 219
 220         (void)fprintf(stderr, "usage: %s [-p] [-m mode] dirname ...\n",
 221             getprogname());
 222         exit(EXIT_FAILURE);
 223         /* NOTREACHED */
 224 }