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, 2008-2021 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 <https://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 __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 
50 int
rpl_mkdir(char const * dir,mode_t mode maybe_unused)51 rpl_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 || errno == EOVERFLOW)
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