sysdeps/unix/sysv/linux/mknodat.c

   1 /* Create a special or ordinary file.  Linux version.
   2    Copyright (C) 2020 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 <sys/types.h>
  20 #include <sys/stat.h>
  21 #include <errno.h>
  22 #include <sysdep.h>
  23
  24 int
  25 __mknodat (int fd, const char *path, mode_t mode, dev_t dev)
  26 {
  27   /* The user-exported dev_t is 64-bit while the kernel interface is
  28      32-bit.  */
  29   unsigned int k_dev = dev;
  30   if (k_dev != dev)
  31     return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
  32
  33   return INLINE_SYSCALL_CALL (mknodat, fd, path, mode, k_dev);
  34 }
  35 libc_hidden_def (__mknodat)
  36 weak_alias (__mknodat, mknodat)