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| | #serial 6
dnl Copyright (C) 2005-2006, 2008-2020 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 From Paul Eggert.
dnl Provide a replacement for lchmod on hosts that lack a working version.
AC_DEFUN([gl_FUNC_LCHMOD],
[
AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
dnl Persuade glibc <sys/stat.h> to declare lchmod().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CHECK_FUNCS_ONCE([fchmodat lchmod lstat])
if test "$ac_cv_func_lchmod" = no; then
HAVE_LCHMOD=0
else
AC_CACHE_CHECK([whether lchmod works on non-symlinks],
[gl_cv_func_lchmod_works],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[
AC_INCLUDES_DEFAULT[
#ifndef S_IRUSR
#define S_IRUSR 0400
#endif
#ifndef S_IWUSR
#define S_IWUSR 0200
#endif
#ifndef S_IRWXU
#define S_IRWXU 0700
#endif
#ifndef S_IRWXG
#define S_IRWXG 0070
#endif
#ifndef S_IRWXO
#define S_IRWXO 0007
#endif
]],
[[
int permissive = S_IRWXU | S_IRWXG | S_IRWXO;
int desired = S_IRUSR | S_IWUSR;
static char const f[] = "conftest.lchmod";
struct stat st;
if (creat (f, permissive) < 0)
return 1;
if (lchmod (f, desired) != 0)
return 1;
if (stat (f, &st) != 0)
return 1;
return ! ((st.st_mode & permissive) == desired);
]])],
[gl_cv_func_lchmod_works=yes],
[gl_cv_func_lchmod_works=no],
[case "$host_os" in
dnl Guess no on Linux with glibc, yes otherwise.
linux-gnu*) gl_cv_func_lchmod_works="guessing no" ;;
*) gl_cv_func_lchmod_works="$gl_cross_guess_normal" ;;
esac
])
rm -f conftest.lchmod])
case $gl_cv_func_lchmod_works in
*yes) ;;
*)
AC_DEFINE([NEED_LCHMOD_NONSYMLINK_FIX], [1],
[Define to 1 if lchmod does not work right on non-symlinks.])
REPLACE_LCHMOD=1
;;
esac
fi
])
# Prerequisites of lib/lchmod.c.
AC_DEFUN([gl_PREREQ_LCHMOD],
[
AC_REQUIRE([AC_C_INLINE])
:
])
|