1/* On some systems, mkdir ("foo/", 0700) fails because of the trailing
2   slash.  On those systems, this wrapper removes the trailing slash.
3
4   Copyright (C) 2001, 2003, 2006, 2008-2014 Free Software Foundation, Inc.
5
6   This program is free software: you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 3 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
18
19/* written by Jim Meyering */
20
21#include <config.h>
22
23/* Specification.  */
24#include <sys/stat.h>
25
26#include <errno.h>
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30
31#include "dirname.h"
32
33/* Disable the definition of mkdir to rpl_mkdir (from the <sys/stat.h>
34   substitute) in this file.  Otherwise, we'd get an endless recursion.  */
35#undef mkdir
36
37/* mingw's _mkdir() function has 1 argument, but we pass 2 arguments.
38   Additionally, it declares _mkdir (and depending on compile flags, an
39   alias mkdir), only in the nonstandard includes <direct.h> and <io.h>,
40   which are included in the <sys/stat.h> override.  */
41#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
42# define mkdir(name,mode) _mkdir (name)
43# define maybe_unused _GL_UNUSED
44#else
45# define maybe_unused /* empty */
46#endif
47
48/* This function is required at least for NetBSD 1.5.2.  */
49
50int
51rpl_mkdir (char const *dir, mode_t mode maybe_unused)
52{
53  int ret_val;
54  char *tmp_dir;
55  size_t len = strlen (dir);
56
57  if (len && dir[len - 1] == '/')
58    {
59      tmp_dir = strdup (dir);
60      if (!tmp_dir)
61        {
62          /* Rather than rely on strdup-posix, we set errno ourselves.  */
63          errno = ENOMEM;
64          return -1;
65        }
66      strip_trailing_slashes (tmp_dir);
67    }
68  else
69    {
70      tmp_dir = (char *) dir;
71    }
72#if FUNC_MKDIR_DOT_BUG
73  /* Additionally, cygwin 1.5 mistakenly creates a directory "d/./".  */
74  {
75    char *last = last_component (tmp_dir);
76    if (*last == '.' && (last[1] == '\0'
77                         || (last[1] == '.' && last[2] == '\0')))
78      {
79        struct stat st;
80        if (stat (tmp_dir, &st) == 0)
81          errno = EEXIST;
82        return -1;
83      }
84  }
85#endif /* FUNC_MKDIR_DOT_BUG */
86
87  ret_val = mkdir (tmp_dir, mode);
88
89  if (tmp_dir != dir)
90    free (tmp_dir);
91
92  return ret_val;
93}
94