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-rw-r--r--src/zstd/tests/gzip/zgrep-signal.sh64
1 files changed, 64 insertions, 0 deletions
diff --git a/src/zstd/tests/gzip/zgrep-signal.sh b/src/zstd/tests/gzip/zgrep-signal.sh
new file mode 100644
index 000000000..a8c53881a
--- /dev/null
+++ b/src/zstd/tests/gzip/zgrep-signal.sh
@@ -0,0 +1,64 @@
+#!/bin/sh
+# Check that zgrep is terminated gracefully by signal when
+# its grep/sed pipeline is terminated by a signal.
+
+# Copyright (C) 2010-2016 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 of the License, 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, see <http://www.gnu.org/licenses/>.
+# limit so don't run it by default.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+
+echo a | gzip -c > f.gz || framework_failure_
+
+test "x$PERL" = x && PERL=perl
+("$PERL" -e 'use POSIX qw(dup2)') >/dev/null 2>&1 ||
+ skip_ "no suitable perl found"
+
+# Run the arguments as a command, in a process where stdout is a
+# dangling pipe and SIGPIPE has the default signal-handling action.
+# This can't be done portably in the shell, because if SIGPIPE is
+# ignored when the shell is entered, the shell might refuse to trap
+# it. Fall back on Perl+POSIX, if available. Take care to close the
+# pipe's read end before running the program; the equivalent of the
+# shell's "command | :" has a race condition in that COMMAND could
+# write before ":" exits.
+write_to_dangling_pipe () {
+ program=${1?}
+ shift
+ args=
+ for arg; do
+ args="$args, '$arg'"
+ done
+ "$PERL" -e '
+ use POSIX qw(dup2);
+ $SIG{PIPE} = "DEFAULT";
+ pipe my ($read_end, $write_end) or die "pipe: $!\n";
+ dup2 fileno $write_end, 1 or die "dup2: $!\n";
+ close $read_end or die "close: $!\n";
+ exec '"'$program'$args"';
+ '
+}
+
+write_to_dangling_pipe cat f.gz f.gz
+signal_status=$?
+test 128 -lt $signal_status ||
+ framework_failure_ 'signal handling busted on this host'
+
+fail=0
+
+write_to_dangling_pipe zgrep a f.gz f.gz
+test $? -eq $signal_status || fail=1
+
+Exit $fail