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

   1 #!/usr/bin/python3
   2 # Test that glibc's sys/socket.h SO_* constants match the kernel's.
   3 # Copyright (C) 2018-2020 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
  25 def main():
  26     """The main entry point."""
  27     parser = argparse.ArgumentParser(
  28         description="Test that glibc's sys/socket.h constants "
  29         "match the kernel's.")
  30     parser.add_argument('--cc', metavar='CC',
  31                         help='C compiler (including options) to use')
  32     args = parser.parse_args()
  33
  34     def check(define):
  35         return glibcextract.compare_macro_consts(
  36             source_1=define + '#include <sys/socket.h>\n',
  37             # Some constants in <asm/socket.h> may depend on the size
  38             # of pid_t or time_t.
  39             source_2='#include <sys/types.h>\n'
  40             '#include <asm/socket.h>\n',
  41             cc=args.cc,
  42             # We cannot compare all macros because some macros cannot
  43             # be expanded as constants, and glibcextract currently is
  44             # not able to isolate errors.
  45             macro_re='SOL?_.*',
  46             # <sys/socket.h> and <asm/socket.h> are not a good match.
  47             # Most socket-related constants are not defined in any
  48             # UAPI header.  Check only the intersection of the macros
  49             # in both headers.  Regular tests ensure that expected
  50             # macros for _GNU_SOURCE are present, and the conformance
  51             # tests cover most of the other modes.
  52             allow_extra_1=True,
  53             allow_extra_2=True)
  54     # _GNU_SOURCE is defined by include/libc-symbols.h, which is
  55     # included by the --cc command.  Defining _ISOMAC does not prevent
  56     # that.
  57     status = max(
  58         check(''),
  59         check('#undef _GNU_SOURCE\n'),
  60         check('#undef _GNU_SOURCE\n'
  61               '#define _POSIX_SOURCE 1\n'))
  62     sys.exit(status)
  63
  64 if __name__ == '__main__':
  65     main()