libbb/make_directory.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini make_directory implementation for busybox
   4  *
   5  * Copyright (C) 2001  Matt Kraai.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  *
  21  */
  22
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <sys/stat.h>
  26 #include <sys/types.h>
  27 #include <unistd.h>
  28 #include <stdlib.h>
  29 #include <libgen.h>
  30
  31 #include "libbb.h"
  32
  33 /* Create the directory PATH with mode MODE, or the default if MODE is -1.
  34  * Also create parent directories as necessary if flags contains
  35  * FILEUTILS_RECUR.  */
  36
  37 int make_directory(const char *path, long mode, int flags)
  38 {
  39         if (!(flags & FILEUTILS_RECUR)) {
  40                 if (mkdir(path, 0777) < 0) {
  41                         perror_msg("Cannot create directory `%s'", path);
  42                         return -1;
  43                 }
  44
  45                 if (mode != -1 && chmod(path, mode) < 0) {
  46                         perror_msg("Cannot set permissions of directory `%s'",
  47                                    path);
  48                         return -1;
  49                 }
  50         } else {
  51                 struct stat st;
  52
  53                 if (stat(path, &st) < 0 && errno == ENOENT) {
  54                         int status;
  55                         char *pathcopy, *parent, *parentcopy;
  56                         mode_t mask;
  57
  58                         mask = umask(0);
  59                         umask(mask);
  60
  61                         /* dirname is unsafe, it may both modify the
  62                            memory of the path argument and may return
  63                            a pointer to static memory, which can then
  64                            be modified by consequtive calls to dirname */
  65
  66                         pathcopy = xstrdup(path);
  67                         parent = dirname(pathcopy);
  68                         parentcopy = xstrdup(parent);
  69                         status = make_directory(parentcopy, (0777 & ~mask)
  70                                                 | 0300, FILEUTILS_RECUR);
  71                         free(pathcopy);
  72                         free(parentcopy);
  73
  74                         if (status < 0 || make_directory(path, mode, 0) < 0)
  75                                 return -1;
  76                 }
  77         }
  78
  79         return 0;
  80 }