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
  34 #ifndef lint
  35 static char const copyright[] =
  36 "@(#) Copyright (c) 1983, 1992, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)mkdir.c     8.2 (Berkeley) 1/25/94";
  43 #endif
  44 #endif /* not lint */
  45 #include <sys/cdefs.h>
  46 __RCSID("$FreeBSD: src/bin/mkdir/mkdir.c,v 1.26 2002/06/30 05:13:54 obrien Exp $");
  47
  48 #include <sys/types.h>
  49 #include <sys/stat.h>
  50
  51 #include <err.h>
  52 #include <errno.h>
  53 #include <libgen.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <string.h>
  57 #include <sysexits.h>
  58 #include <unistd.h>
  59
  60 static int      build(char *, mode_t);
  61 static void     usage(void);
  62
  63 int vflag;
  64
  65 int
  66 main(int argc, char *argv[])
  67 {
  68         int ch, exitval, success, pflag;
  69         mode_t omode, *set = (mode_t *)NULL;
  70         char *mode;
  71
  72         omode = pflag = 0;
  73         mode = NULL;
  74         while ((ch = getopt(argc, argv, "m:pv")) != -1)
  75                 switch(ch) {
  76                 case 'm':
  77                         mode = optarg;
  78                         break;
  79                 case 'p':
  80                         pflag = 1;
  81                         break;
  82                 case 'v':
  83                         vflag = 1;
  84                         break;
  85                 case '?':
  86                 default:
  87                         usage();
  88                 }
  89
  90         argc -= optind;
  91         argv += optind;
  92         if (argv[0] == NULL)
  93                 usage();
  94
  95         if (mode == NULL) {
  96                 omode = S_IRWXU | S_IRWXG | S_IRWXO;
  97         } else {
  98                 if ((set = setmode(mode)) == NULL)
  99                         errx(1, "invalid file mode: %s", mode);
 100                 omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
 101                 free(set);
 102         }
 103
 104         for (exitval = 0; *argv != NULL; ++argv) {
 105                 success = 1;
 106                 if (pflag) {
 107                         if (build(*argv, omode))
 108                                 success = 0;
 109                 } else if (mkdir(*argv, omode) < 0) {
 110                         if (errno == ENOTDIR || errno == ENOENT)
 111                                 warn("%s", dirname(*argv));
 112                         else
 113                                 warn("%s", *argv);
 114                         success = 0;
 115                 } else if (vflag)
 116                         (void)printf("%s\n", *argv);
 117
 118                 if (!success)
 119                         exitval = 1;
 120                 /*
 121                  * The mkdir() and umask() calls both honor only the low
 122                  * nine bits, so if you try to set a mode including the
 123                  * sticky, setuid, setgid bits you lose them.  Don't do
 124                  * this unless the user has specifically requested a mode,
 125                  * as chmod will (obviously) ignore the umask.
 126                  */
 127                 if (success && mode != NULL && chmod(*argv, omode) == -1) {
 128                         warn("%s", *argv);
 129                         exitval = 1;
 130                 }
 131         }
 132         exit(exitval);
 133 }
 134
 135 int
 136 build(char *path, mode_t omode)
 137 {
 138         struct stat sb;
 139         mode_t numask, oumask;
 140         int first, last, retval;
 141         char *p;
 142
 143         p = path;
 144         oumask = 0;
 145         retval = 0;
 146         if (p[0] == '/')                /* Skip leading '/'. */
 147                 ++p;
 148         for (first = 1, last = 0; !last ; ++p) {
 149                 if (p[0] == '\0')
 150                         last = 1;
 151                 else if (p[0] != '/')
 152                         continue;
 153                 *p = '\0';
 154                 if (p[1] == '\0')
 155                         last = 1;
 156                 if (first) {
 157                         /*
 158                          * POSIX 1003.2:
 159                          * For each dir operand that does not name an existing
 160                          * directory, effects equivalent to those cased by the
 161                          * following command shall occcur:
 162                          *
 163                          * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
 164                          *    mkdir [-m mode] dir
 165                          *
 166                          * We change the user's umask and then restore it,
 167                          * instead of doing chmod's.
 168                          */
 169                         oumask = umask(0);
 170                         numask = oumask & ~(S_IWUSR | S_IXUSR);
 171                         (void)umask(numask);
 172                         first = 0;
 173                 }
 174                 if (last)
 175                         (void)umask(oumask);
 176                 if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
 177                         if (errno == EEXIST || errno == EISDIR) {
 178                                 if (stat(path, &sb) < 0) {
 179                                         warn("%s", path);
 180                                         retval = 1;
 181                                         break;
 182                                 } else if (!S_ISDIR(sb.st_mode)) {
 183                                         if (last)
 184                                                 errno = EEXIST;
 185                                         else
 186                                                 errno = ENOTDIR;
 187                                         warn("%s", path);
 188                                         retval = 1;
 189                                         break;
 190                                 }
 191                         } else {
 192                                 warn("%s", path);
 193                                 retval = 1;
 194                                 break;
 195                         }
 196                 } else if (vflag)
 197                         printf("%s\n", path);
 198                 if (!last)
 199                     *p = '/';
 200         }
 201         if (!first && !last)
 202                 (void)umask(oumask);
 203         return (retval);
 204 }
 205
 206 void
 207 usage(void)
 208 {
 209
 210         (void)fprintf(stderr, "usage: mkdir [-pv] [-m mode] directory ...\n");
 211         exit (EX_USAGE);
 212 }