gnulib/import/m4/openat.m4

   1 # serial 46
   2 # See if we need to use our replacement for Solaris' openat et al functions.
   3
   4 dnl Copyright (C) 2004-2019 Free Software Foundation, Inc.
   5 dnl This file is free software; the Free Software Foundation
   6 dnl gives unlimited permission to copy and/or distribute it,
   7 dnl with or without modifications, as long as this notice is preserved.
   8
   9 # Written by Jim Meyering.
  10
  11 AC_DEFUN([gl_FUNC_OPENAT],
  12 [
  13   AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
  14   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  15   AC_CHECK_FUNCS_ONCE([openat])
  16   AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
  17   AC_REQUIRE([gl_PREPROC_O_CLOEXEC])
  18   case $ac_cv_func_openat+$gl_cv_func_lstat_dereferences_slashed_symlink+$gl_cv_macro_O_CLOEXEC in
  19   yes+*yes+yes)
  20     ;;
  21   yes+*)
  22     # Solaris 10 lacks O_CLOEXEC.
  23     # Solaris 9 has *at functions, but uniformly mishandles trailing
  24     # slash in all of them.
  25     REPLACE_OPENAT=1
  26     ;;
  27   *)
  28     HAVE_OPENAT=0
  29     ;;
  30   esac
  31 ])
  32
  33 # Prerequisites of lib/openat.c.
  34 AC_DEFUN([gl_PREREQ_OPENAT],
  35 [
  36   AC_REQUIRE([gl_PROMOTED_TYPE_MODE_T])
  37   :
  38 ])