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  * 4. 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
  30 #if 0
  31 #ifndef lint
  32 static char const copyright[] =
  33 "@(#) Copyright (c) 1983, 1992, 1993\n\
  34         The Regents of the University of California.  All rights reserved.\n";
  35 #endif /* not lint */
  36
  37 #ifndef lint
  38 static char sccsid[] = "@(#)mkdir.c     8.2 (Berkeley) 1/25/94";
  39 #endif /* not lint */
  40 #endif
  41 #include <sys/cdefs.h>
  42 __FBSDID("$FreeBSD$");
  43
  44 #include <sys/types.h>
  45 #include <sys/stat.h>
  46
  47 #include <err.h>
  48 #include <errno.h>
  49 #include <libgen.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <sysexits.h>
  54 #include <unistd.h>
  55
  56 static int      build(char *, mode_t);
  57 static void     usage(void);
  58
  59 int vflag;
  60
  61 int
  62 main(int argc, char *argv[])
  63 {
  64         int ch, exitval, success, pflag;
  65         mode_t omode;
  66         void *set = NULL;
  67         char *mode;
  68
  69         omode = pflag = 0;
  70         mode = NULL;
  71         while ((ch = getopt(argc, argv, "m:pv")) != -1)
  72                 switch(ch) {
  73                 case 'm':
  74                         mode = optarg;
  75                         break;
  76                 case 'p':
  77                         pflag = 1;
  78                         break;
  79                 case 'v':
  80                         vflag = 1;
  81                         break;
  82                 case '?':
  83                 default:
  84                         usage();
  85                 }
  86
  87         argc -= optind;
  88         argv += optind;
  89         if (argv[0] == NULL)
  90                 usage();
  91
  92         if (mode == NULL) {
  93                 omode = S_IRWXU | S_IRWXG | S_IRWXO;
  94         } else {
  95                 if ((set = setmode(mode)) == NULL)
  96                         errx(1, "invalid file mode: %s", mode);
  97                 omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
  98                 free(set);
  99         }
 100
 101         for (exitval = 0; *argv != NULL; ++argv) {
 102                 if (pflag) {
 103                         success = build(*argv, omode);
 104                 } else if (mkdir(*argv, omode) < 0) {
 105                         if (errno == ENOTDIR || errno == ENOENT)
 106                                 warn("%s", dirname(*argv));
 107                         else
 108                                 warn("%s", *argv);
 109                         success = 0;
 110                 } else {
 111                         success = 1;
 112                         if (vflag)
 113                                 (void)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.  Do this
 123                  * on newly created directories only.
 124                  */
 125                 if (success == 1 && mode != NULL && chmod(*argv, omode) == -1) {
 126                         warn("%s", *argv);
 127                         exitval = 1;
 128                 }
 129         }
 130         exit(exitval);
 131 }
 132
 133
 134 /*
 135  * Returns 1 if a directory has been created,
 136  * 2 if it already existed, and 0 on failure.
 137  */
 138 int
 139 build(char *path, mode_t omode)
 140 {
 141         struct stat sb;
 142         mode_t numask, oumask;
 143         int first, last, retval;
 144         char *p;
 145
 146         p = path;
 147         oumask = 0;
 148         retval = 1;
 149         if (p[0] == '/')                /* Skip leading '/'. */
 150                 ++p;
 151         for (first = 1, last = 0; !last ; ++p) {
 152                 if (p[0] == '\0')
 153                         last = 1;
 154                 else if (p[0] != '/')
 155                         continue;
 156                 *p = '\0';
 157                 if (!last && p[1] == '\0')
 158                         last = 1;
 159                 if (first) {
 160                         /*
 161                          * POSIX 1003.2:
 162                          * For each dir operand that does not name an existing
 163                          * directory, effects equivalent to those caused by the
 164                          * following command shall occcur:
 165                          *
 166                          * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
 167                          *    mkdir [-m mode] dir
 168                          *
 169                          * We change the user's umask and then restore it,
 170                          * instead of doing chmod's.
 171                          */
 172                         oumask = umask(0);
 173                         numask = oumask & ~(S_IWUSR | S_IXUSR);
 174                         (void)umask(numask);
 175                         first = 0;
 176                 }
 177                 if (last)
 178                         (void)umask(oumask);
 179                 if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
 180                         if (errno == EEXIST || errno == EISDIR) {
 181                                 if (stat(path, &sb) < 0) {
 182                                         warn("%s", path);
 183                                         retval = 0;
 184                                         break;
 185                                 } else if (!S_ISDIR(sb.st_mode)) {
 186                                         if (last)
 187                                                 errno = EEXIST;
 188                                         else
 189                                                 errno = ENOTDIR;
 190                                         warn("%s", path);
 191                                         retval = 0;
 192                                         break;
 193                                 }
 194                                 if (last)
 195                                         retval = 2;
 196                         } else {
 197                                 warn("%s", path);
 198                                 retval = 0;
 199                                 break;
 200                         }
 201                 } else if (vflag)
 202                         printf("%s\n", path);
 203                 if (!last)
 204                     *p = '/';
 205         }
 206         if (!first && !last)
 207                 (void)umask(oumask);
 208         return (retval);
 209 }
 210
 211 void
 212 usage(void)
 213 {
 214
 215         (void)fprintf(stderr,
 216             "usage: mkdir [-pv] [-m mode] directory_name ...\n");
 217         exit (EX_USAGE);
 218 }