1  /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <fcntl.h>
      20  #include <stddef.h>
      21  #include <sys/stat.h>
      22  #include <sys/types.h>
      23  
      24  
      25  /* Create a named pipe (FIFO) named PATH relative to FD with
      26     protections MODE.  */
      27  int
      28  mkfifoat (int fd, const char *path, mode_t mode)
      29  {
      30    if (path == NULL)
      31      {
      32        __set_errno (EINVAL);
      33        return -1;
      34      }
      35  
      36    if (fd != AT_FDCWD && path[0] != '/')
      37      {
      38        /* Check FD is associated with a directory.  */
      39        struct stat64 st;
      40        if (__fstat64 (fd, &st) != 0)
      41  	return -1;
      42  
      43        if (!S_ISDIR (st.st_mode))
      44  	{
      45  	  __set_errno (ENOTDIR);
      46  	  return -1;
      47  	}
      48      }
      49  
      50    __set_errno (ENOSYS);
      51    return -1;
      52  }
      53  
      54  
      55  stub_warning (mkfifoat)