maint: port to platforms lacking SIGPIPE

[debian/gzip] / tests / zgrep-signal

diff --git a/tests/zgrep-signal b/tests/zgrep-signal
old mode 100644 (file)
new mode 100755 (executable)
index fc09a9e..8b4e8d0
--- a/tests/zgrep-signal
+++ b/tests/zgrep-signal
@@ -2,7 +2,7 @@
 # Check that zgrep is terminated gracefully by signal when
 # its grep/sed pipeline is terminated by a signal.
 
-# Copyright (C) 2010-2011 Free Software Foundation, Inc.
+# Copyright (C) 2010-2012 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
@@ -22,10 +22,35 @@
 
 echo a | gzip -c > f.gz || framework_failure_
 
+test "x$PERL" = x && PERL=perl
+("$PERL" -e 'use warnings') >/dev/null 2>&1 || skip_ "no suitable perl found"
+
+exec_with_SIGPIPE_SIG_DFL () {
+  program=${1?}
+  shift
+  args=
+  for arg; do
+    args="$args, '$arg'"
+  done
+  "$PERL" -e "\$SIG{PIPE} = 'DEFAULT'; exec '$program'$args"
+}
+
+write_to_dangling_pipe () {
+  exec 3>&1
+  (
+    exec_with_SIGPIPE_SIG_DFL "$@"
+    echo $? >&3
+  ) | : || framework_failure_
+}
+
+signal_status=$(write_to_dangling_pipe cat f.gz f.gz)
+test 128 -lt $signal_status ||
+  framework_failure_ 'signal handling busted on this host'
+
 fail=0
 
-st=$(exec 3>&1; (zgrep a f.gz f.gz; echo $? >&3) | :) || framework_failure_
+st=$(write_to_dangling_pipe zgrep a f.gz f.gz)
 
-test "$st" = 141 || fail=1
+test $st = $signal_status || fail=1
 
 Exit $fail