bin/mkdir/mkdir.c

   1 /*
   2  * Copyright (c) 1983, 1992, 1993
   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  * @(#) Copyright (c) 1983, 1992, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)mkdir.c  8.2 (Berkeley) 1/25/94
  35  * $FreeBSD: src/bin/mkdir/mkdir.c,v 1.19.2.2 2001/08/01 04:42:37 obrien Exp $
  36  * $DragonFly: src/bin/mkdir/mkdir.c,v 1.6 2004/11/07 20:54:51 eirikn Exp $
  37  */
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41
  42 #include <err.h>
  43 #include <errno.h>
  44 #include <libgen.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <sysexits.h>
  49 #include <unistd.h>
  50
  51 static int      build(char *, mode_t);
  52 static void     usage(void);
  53
  54 int vflag;
  55
  56 int
  57 main(int argc, char **argv)
  58 {
  59         int ch, exitval, success, pflag;
  60         void *set;
  61         mode_t omode;
  62         char *mode;
  63
  64         omode = pflag = 0;
  65         mode = NULL;
  66         while ((ch = getopt(argc, argv, "m:pv")) != -1)
  67                 switch(ch) {
  68                 case 'm':
  69                         mode = optarg;
  70                         break;
  71                 case 'p':
  72                         pflag = 1;
  73                         break;
  74                 case 'v':
  75                         vflag = 1;
  76                         break;
  77                 default:
  78                         usage();
  79                 }
  80
  81         argc -= optind;
  82         argv += optind;
  83         if (argv[0] == NULL)
  84                 usage();
  85
  86         if (mode == NULL) {
  87                 omode = S_IRWXU | S_IRWXG | S_IRWXO;
  88         } else {
  89                 errno = 0;
  90                 if ((set = setmode(mode)) == NULL) {
  91                         if (!errno)
  92                                 errx(1, "invalid file mode: %s", mode);
  93                         else
  94                                 /* A malloc(3) error, not a invaild file mode. */
  95                                 err(1, "setmode failed");
  96                 }
  97                 omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
  98                 free(set);
  99         }
 100
 101         for (exitval = 0; *argv != NULL; ++argv) {
 102                 success = 1;
 103                 if (pflag) {
 104                         if (build(*argv, omode))
 105                                 success = 0;
 106                 } else if (mkdir(*argv, omode) < 0) {
 107                         if (errno == ENOTDIR || errno == ENOENT)
 108                                 warn("%s", dirname(*argv));
 109                         else
 110                                 warn("%s", *argv);
 111                         success = 0;
 112                 } else if (vflag)
 113                         printf("%s\n", *argv);
 114
 115                 if (!success)
 116                         exitval = 1;
 117                 /*
 118                  * The mkdir() and umask() calls both honor only the low
 119                  * nine bits, so if you try to set a mode including the
 120                  * sticky, setuid, setgid bits you lose them.  Don't do
 121                  * this unless the user has specifically requested a mode,
 122                  * as chmod will (obviously) ignore the umask.
 123                  */
 124                 if (success && mode != NULL && chmod(*argv, omode) == -1) {
 125                         warn("%s", *argv);
 126                         exitval = 1;
 127                 }
 128         }
 129         exit(exitval);
 130 }
 131
 132 static int
 133 build(char *path, mode_t omode)
 134 {
 135         struct stat sb;
 136         mode_t numask, oumask;
 137         int first, last, retval;
 138         char *p;
 139
 140         p = path;
 141         oumask = 0;
 142         retval = 0;
 143         if (p[0] == '/')                /* Skip leading '/'. */
 144                 ++p;
 145         for (first = 1, last = 0; !last ; ++p) {
 146                 if (p[0] == '\0')
 147                         last = 1;
 148                 else if (p[0] != '/')
 149                         continue;
 150                 *p = '\0';
 151                 if (p[1] == '\0')
 152                         last = 1;
 153                 if (first) {
 154                         /*
 155                          * POSIX 1003.2:
 156                          * For each dir operand that does not name an existing
 157                          * directory, effects equivalent to those cased by the
 158                          * following command shall occcur:
 159                          *
 160                          * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
 161                          *    mkdir [-m mode] dir
 162                          *
 163                          * We change the user's umask and then restore it,
 164                          * instead of doing chmod's.
 165                          */
 166                         oumask = umask(0);
 167                         numask = oumask & ~(S_IWUSR | S_IXUSR);
 168                         umask(numask);
 169                         first = 0;
 170                 }
 171                 if (last)
 172                         umask(oumask);
 173                 if (stat(path, &sb)) {
 174                         if (errno != ENOENT ||
 175                             mkdir(path, last ? omode :
 176                                   S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
 177                                 warn("%s", path);
 178                                 retval = 1;
 179                                 break;
 180                         } else if (vflag)
 181                                 printf("%s\n", path);
 182                 }
 183                 else if ((sb.st_mode & S_IFMT) != S_IFDIR) {
 184                         if (last)
 185                                 errno = EEXIST;
 186                         else
 187                                 errno = ENOTDIR;
 188                         warn("%s", path);
 189                         retval = 1;
 190                         break;
 191                 }
 192                 if (!last)
 193                     *p = '/';
 194         }
 195         if (!first && !last)
 196                 umask(oumask);
 197         return (retval);
 198 }
 199
 200 static void
 201 usage(void)
 202 {
 203
 204         fprintf(stderr, "usage: mkdir [-pv] [-m mode] directory ...\n");
 205         exit (EX_USAGE);
 206 }