-#serial 5
+# Check for a working shell.
+
+# Copyright (C) 2000-2001, 2007, 2009-2017 Free Software Foundation, Inc.
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+# 02111-1307, USA.
# AC_PROG_SHELL
# -------------
[AC_MSG_CHECKING([for a POSIX-compliant shell])
AC_CACHE_VAL(ac_cv_path_shell,
[ac_command='
- # Test the noclobber option, using the portable POSIX.2 syntax.
- set -C
- rm -f conftest.c
- >conftest.c || exit
- >|conftest.c || exit
- !>conftest.c || exit
- # Test that $(...) works.
- test "$(expr 3 + 4)" -eq 7 || exit
+ # Test the noclobber option, using the portable POSIX.2 syntax.
+ set -C
+ rm -f conftest.c
+ >conftest.c || exit
+ >|conftest.c || exit
+ !>conftest.c || exit
+ # Test that $(...) works.
+ test "$(expr 3 + 4)" -eq 7 || exit
'
+ # Solaris 11 /bin/sh (AT&T Research) 93u 2011-02-08 has a file
+ # descriptor bug that breaks zgrep and is hard to test for
+ # directly. At some point $(...) is reading a pipe from the
+ # subshell, but the pipe is also open in the parent shell, so
+ # the read deadlocks. Prefer some other shell if available.
+ ac_maybe_solaris_sh_bug='test "${.sh.version}"'
+
ac_cv_path_shell=no
case $SHELL in
/*)
- rm -f conftest.c
- if ("$SHELL" -c "$ac_command") 2>/dev/null; then
- ac_cv_path_shell=$SHELL
- fi;;
+ rm -f conftest.c
+ if ("$SHELL" -c "$ac_command") 2>/dev/null; then
+ "$SHELL" -c "$ac_maybe_solaris_sh_bug" 2>/dev/null ||
+ ac_cv_path_shell=$SHELL
+ fi
esac
case $ac_cv_path_shell in
no)
- # Prefer shells that are more likely to be installed in the
- # same place on all hosts of this platform. Therefore, prefer
- # shells in /bin and /usr/bin to shells in the installer's
- # PATH. Also, loop through PATH first and then through
- # shells, since less-"nice" shells in /bin and /usr/bin are
- # more likely to be installed than "nicer" shells elsewhere.
- as_save_IFS=$IFS; IFS=:
- for as_dir in /bin /usr/bin $PATH
- do
- IFS=$as_save_IFS
- case $as_dir in
- /*)
- for ac_base in sh bash ksh sh5; do
- rm -f conftest.c
- if ("$as_dir/$ac_base" -c "$ac_command") 2>/dev/null; then
- ac_cv_path_shell=$as_dir/$ac_base
- break
- fi
- done
- case $ac_cv_path_shell in
- /*) break;;
- esac;;
- esac
- done
- rm -f conftest.c;;
+ # Prefer shells that are more likely to be installed in the
+ # same place on all hosts of this platform. Therefore, prefer
+ # shells in /bin and /usr/bin to shells in the installer's
+ # PATH. Also, loop through PATH first and then through
+ # shells, since less-"nice" shells in /bin and /usr/bin are
+ # more likely to be installed than "nicer" shells elsewhere.
+ ac_break_if_good_shell=:
+ as_save_IFS=$IFS; IFS=:
+ for as_dir in /bin /usr/bin $PATH
+ do
+ IFS=$as_save_IFS
+ case $as_dir in
+ /*)
+ for ac_base in sh bash ksh sh5; do
+ rm -f conftest.c
+ if ("$as_dir/$ac_base" -c "$ac_command") 2>/dev/null; then
+ if "$as_dir/$ac_base" -c "$ac_maybe_solaris_sh_bug" 2>/dev/null
+ then
+ test "$ac_cv_path_shell" = no
+ else
+ ac_break_if_good_shell=break
+ :
+ fi && ac_cv_path_shell=$as_dir/$ac_base
+ $ac_break_if_good_shell
+ fi
+ done
+ $ac_break_if_good_shell
+ esac
+ done
+ rm -f conftest.c
esac])
AC_MSG_RESULT($ac_cv_path_shell)
SHELL=$ac_cv_path_shell
SHELL=/bin/sh
AC_MSG_WARN([using $SHELL, even though it does not conform to POSIX])
fi
+ if "$SHELL" -c "$ac_maybe_solaris_sh_bug" 2>/dev/null; then
+ AC_MSG_WARN([using $SHELL, even though it may have file descriptor bugs])
+ fi
AC_SUBST(SHELL)])
projects / debian / gzip / blobdiff