sysdeps/unix/sysv/linux/tst-mount-consts.py

   1 #!/usr/bin/python3
   2 # Test that glibc's sys/mount.h constants match the kernel's.
   3 # Copyright (C) 2022 Free Software Foundation, Inc.
   4 # This file is part of the GNU C Library.
   5 #
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Lesser General Public
   8 # License as published by the Free Software Foundation; either
   9 # version 2.1 of the License, or (at your option) any later version.
  10 #
  11 # The GNU C Library 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 GNU
  14 # Lesser General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU Lesser General Public
  17 # License along with the GNU C Library; if not, see
  18 # <https://www.gnu.org/licenses/>.
  19
  20 import argparse
  21 import sys
  22
  23 import glibcextract
  24 import glibcsyscalls
  25
  26
  27 def main():
  28     """The main entry point."""
  29     parser = argparse.ArgumentParser(
  30         description="Test that glibc's sys/mount.h constants "
  31         "match the kernel's.")
  32     parser.add_argument('--cc', metavar='CC',
  33                         help='C compiler (including options) to use')
  34     args = parser.parse_args()
  35
  36     linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
  37     # Constants in glibc were updated to match Linux v5.19.  When glibc
  38     # constants are updated this value should be updated to match the
  39     # released kernel version from which the constants were taken.
  40     linux_version_glibc = (5, 19)
  41     def check(cte, exclude=None):
  42         return glibcextract.compare_macro_consts(
  43                 '#include <sys/mount.h>\n',
  44                 '#include <asm/fcntl.h>\n'
  45                 '#include <linux/mount.h>\n',
  46                 args.cc,
  47                 cte,
  48                 exclude,
  49                 linux_version_glibc > linux_version_headers,
  50                 linux_version_headers > linux_version_glibc)
  51
  52     # Skip testing FS_CONFIG commands since they are only enums in the kernel
  53     # header.
  54     status = max(
  55         check('FSOPEN_.*'),
  56         check('FSMOUNT_.*'),
  57         # MOVE_MOUNT__MASK may vary depending of the kernel version.
  58         check('MOVE_MOUNT_.*', 'MOVE_MOUNT__MASK'),
  59         check('OPEN_TREE_*'),
  60         # MOUNT_ATTR_SIZE_VER0 is used for mount_setattr.
  61         check('MOUNT_ATTR_.*', 'MOUNT_ATTR_SIZE_VER0'))
  62     sys.exit(status)
  63
  64 if __name__ == '__main__':
  65     main()