/* On some systems, mkdir ("foo/", 0700) fails because of the trailing

   slash.  On those systems, this wrapper removes the trailing slash.

   Copyright (C) 2001, 2003, 2006, 2008-2019 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU Lesser General Public License as published by

   the Free Software Foundation; either version 2.1 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* written by Jim Meyering */

#include <config.h>

/* Specification.  */

#include <sys/stat.h>

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "dirname.h"

/* Disable the definition of mkdir to rpl_mkdir (from the <sys/stat.h>

   substitute) in this file.  Otherwise, we'd get an endless recursion.  */

#undef mkdir

/* mingw's _mkdir() function has 1 argument, but we pass 2 arguments.

   Additionally, it declares _mkdir (and depending on compile flags, an

   alias mkdir), only in the nonstandard includes <direct.h> and <io.h>,

   which are included in the <sys/stat.h> override.  */

#if defined _WIN32 && ! defined __CYGWIN__

# define mkdir(name,mode) _mkdir (name)

# define maybe_unused _GL_UNUSED

#else

# define maybe_unused /* empty */

#endif

/* This function is required at least for NetBSD 1.5.2.  */

int

rpl_mkdir (char const *dir, mode_t mode maybe_unused)

{

  int ret_val;

  char *tmp_dir;

  size_t len = strlen (dir);

  if (len && dir[len - 1] == '/')

    {

      tmp_dir = strdup (dir);

      if (!tmp_dir)

        {

          /* Rather than rely on strdup-posix, we set errno ourselves.  */

          errno = ENOMEM;

          return -1;

        }

      strip_trailing_slashes (tmp_dir);

    }

  else

    {

      tmp_dir = (char *) dir;

    }

#if FUNC_MKDIR_DOT_BUG

  /* Additionally, cygwin 1.5 mistakenly creates a directory "d/./".  */

  {

    char *last = last_component (tmp_dir);

    if (*last == '.' && (last[1] == '\0'

                         || (last[1] == '.' && last[2] == '\0')))

      {

        struct stat st;

        if (stat (tmp_dir, &st) == 0)

          errno = EEXIST;

        return -1;

      }

  }

#endif /* FUNC_MKDIR_DOT_BUG */

  ret_val = mkdir (tmp_dir, mode);

  if (tmp_dir != dir)

    free (tmp_dir);

  return ret_val;

}