view m4/dirent_h.m4 @ 12127:bda9467a9d66

fdopendir: fix GNU/Hurd bug fdopendir(open("file",O_RDONLY)) mistakenly succeeded, with subsequent readdir() failing with ENOTDIR. * m4/fdopendir.m4 (gl_FUNC_FDOPENDIR): Check for Hurd bug in allowing non-directory fds. * lib/fdopendir.c (rpl_fdopendir): Work around it. * m4/dirent_h.m4 (gl_DIRENT_H_DEFAULTS): New witness. * modules/dirent (Makefile.am): Substitute it. * lib/dirent.in.h (fdopendir): Declare replacement. * doc/posix-functions/fdopendir.texi (fdopendir): Document this. * tests/test-fdopendir.c (main): Test something other than /dev/null, since on Hurd that behaves like a directory. Signed-off-by: Eric Blake <ebb9@byu.net>
author Eric Blake <ebb9@byu.net>
date Tue, 06 Oct 2009 06:58:08 -0600
parents a1e0b2efc812
children ec411e51b85a
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# dirent_h.m4 serial 6
dnl Copyright (C) 2008-2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

dnl Written by Bruno Haible.

AC_DEFUN([gl_DIRENT_H],
[
  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
  dnl once only, before all statements that occur in other macros.
  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])

  gl_CHECK_NEXT_HEADERS([dirent.h])
])

dnl Unconditionally enables the replacement of <dirent.h>.
AC_DEFUN([gl_REPLACE_DIRENT_H],
[
  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
  DIRENT_H='dirent.h'
])

AC_DEFUN([gl_DIRENT_MODULE_INDICATOR],
[
  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
])

AC_DEFUN([gl_DIRENT_H_DEFAULTS],
[
  AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) dnl for REPLACE_FCHDIR
  GNULIB_DIRFD=0;       AC_SUBST([GNULIB_DIRFD])
  GNULIB_FDOPENDIR=0;   AC_SUBST([GNULIB_FDOPENDIR])
  GNULIB_SCANDIR=0;     AC_SUBST([GNULIB_SCANDIR])
  GNULIB_ALPHASORT=0;   AC_SUBST([GNULIB_ALPHASORT])
  dnl Assume proper GNU behavior unless another module says otherwise.
  HAVE_DECL_DIRFD=1;    AC_SUBST([HAVE_DECL_DIRFD])
  HAVE_FDOPENDIR=1;     AC_SUBST([HAVE_FDOPENDIR])
  HAVE_SCANDIR=1;       AC_SUBST([HAVE_SCANDIR])
  HAVE_ALPHASORT=1;     AC_SUBST([HAVE_ALPHASORT])
  REPLACE_CLOSEDIR=0;   AC_SUBST([REPLACE_CLOSEDIR])
  REPLACE_FDOPENDIR=0;  AC_SUBST([REPLACE_FDOPENDIR])
  REPLACE_OPENDIR=0;    AC_SUBST([REPLACE_OPENDIR])
  DIRENT_H='';          AC_SUBST([DIRENT_H])
])