1  /* Error-checking replacement for "mkdir -p".
       2     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <support/support.h>
      20  #include <support/check.h>
      21  #include <support/xunistd.h>
      22  
      23  #include <stdlib.h>
      24  #include <string.h>
      25  #include <errno.h>
      26  
      27  /* Equivalent of "mkdir -p".  Any failures cause FAIL_EXIT1 so no
      28     return code is needed.  */
      29  
      30  void
      31  xmkdirp (const char *path, mode_t mode)
      32  {
      33    struct stat s;
      34    const char *slash_p;
      35    int rv;
      36  
      37    if (path[0] == 0)
      38      return;
      39  
      40    if (stat (path, &s) == 0)
      41      {
      42        if (S_ISDIR (s.st_mode))
      43  	return;
      44        errno = EEXIST;
      45        FAIL_EXIT1 ("mkdir_p (\"%s\", 0%o): %m", path, mode);
      46      }
      47  
      48    slash_p = strrchr (path, '/');
      49    if (slash_p != NULL)
      50      {
      51        while (slash_p > path && slash_p[-1] == '/')
      52  	--slash_p;
      53        if (slash_p > path)
      54  	{
      55  	  char *parent = xstrndup (path, slash_p - path);
      56  	  xmkdirp (parent, mode);
      57  	  free (parent);
      58  	}
      59      }
      60  
      61    rv = mkdir (path, mode);
      62    if (rv != 0)
      63      FAIL_EXIT1 ("mkdir_p (\"%s\", 0%o): %m", path, mode);
      64  
      65    return;
      66  }