mirror of https://git.tukaani.org/xz.git
64 lines
1.7 KiB
Plaintext
64 lines
1.7 KiB
Plaintext
# Find a POSIX-conforming shell.
|
|
|
|
# Copyright (C) 2007-2008 Free Software Foundation, Inc.
|
|
|
|
# This file is free software; the Free Software Foundation
|
|
# gives unlimited permission to copy and/or distribute it,
|
|
# with or without modifications, as long as this notice is preserved.
|
|
|
|
# Written by Paul Eggert.
|
|
|
|
# If a POSIX-conforming shell can be found, set POSIX_SHELL and
|
|
# PREFERABLY_POSIX_SHELL to it. If not, set POSIX_SHELL to the
|
|
# empty string and PREFERABLY_POSIX_SHELL to '/bin/sh'.
|
|
|
|
AC_DEFUN([gl_POSIX_SHELL],
|
|
[
|
|
AC_CACHE_CHECK([for a shell that conforms to POSIX], [gl_cv_posix_shell],
|
|
[gl_test_posix_shell_script='
|
|
func_return () {
|
|
(exit [$]1)
|
|
}
|
|
func_success () {
|
|
func_return 0
|
|
}
|
|
func_failure () {
|
|
func_return 1
|
|
}
|
|
func_ret_success () {
|
|
return 0
|
|
}
|
|
func_ret_failure () {
|
|
return 1
|
|
}
|
|
subshell_umask_sanity () {
|
|
(umask 22; (umask 0); test $(umask) -eq 22)
|
|
}
|
|
test "[$](echo foo)" = foo &&
|
|
func_success &&
|
|
! func_failure &&
|
|
func_ret_success &&
|
|
! func_ret_failure &&
|
|
(set x && func_ret_success y && test x = "[$]1") &&
|
|
subshell_umask_sanity
|
|
'
|
|
for gl_cv_posix_shell in \
|
|
"$CONFIG_SHELL" "$SHELL" /bin/sh /bin/bash /bin/ksh /bin/sh5 no; do
|
|
case $gl_cv_posix_shell in
|
|
/*)
|
|
"$gl_cv_posix_shell" -c "$gl_test_posix_shell_script" 2>/dev/null \
|
|
&& break;;
|
|
esac
|
|
done])
|
|
|
|
if test "$gl_cv_posix_shell" != no; then
|
|
POSIX_SHELL=$gl_cv_posix_shell
|
|
PREFERABLY_POSIX_SHELL=$POSIX_SHELL
|
|
else
|
|
POSIX_SHELL=
|
|
PREFERABLY_POSIX_SHELL=/bin/sh
|
|
fi
|
|
AC_SUBST([POSIX_SHELL])
|
|
AC_SUBST([PREFERABLY_POSIX_SHELL])
|
|
])
|