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
  30 #include "libbb.h"
  31
  32 /* Create the directory PATH with mode MODE, or the default if MODE is -1.
  33  * Also create parent directories as necessary if flags contains
  34  * FILEUTILS_RECUR.  */
  35
  36 int make_directory (const char *path, long mode, int flags)
  37 {
  38         if (!(flags & FILEUTILS_RECUR)) {
  39                 if (mkdir (path, 0777) < 0) {
  40                         perror_msg ("Cannot create directory `%s'", path);
  41                         return -1;
  42                 }
  43
  44                 if (mode != -1 && chmod (path, mode) < 0) {
  45                         perror_msg ("Cannot set permissions of directory `%s'", path);
  46                         return -1;
  47                 }
  48         } else {
  49                 struct stat st;
  50
  51                 if (stat (path, &st) < 0 && errno == ENOENT) {
  52                         int status;
  53                         char *pathcopy, *parent, *parentcopy;
  54                         mode_t mask;
  55
  56                         mask = umask (0);
  57                         umask (mask);
  58
  59                         /* dirname is unsafe, it may both modify the
  60                            memory of the path argument and may return
  61                            a pointer to static memory, which can then
  62                            be modified by consequtive calls to dirname */
  63
  64                         pathcopy = xstrdup (path);
  65                         parent = dirname (pathcopy);
  66                         parentcopy = xstrdup (parent);
  67                         status = make_directory (parentcopy, (0777 & ~mask)
  68                                                                          | 0300, FILEUTILS_RECUR);
  69                         free (pathcopy);
  70                         free (parentcopy);
  71
  72
  73                         if (status < 0 || make_directory (path, mode, 0) < 0)
  74                                 return -1;
  75                 }
  76         }
  77
  78         return 0;
  79 }