1 files changed, 39 insertions, 0 deletions
diff --git a/tests/misc/seq-epipe.sh b/tests/misc/seq-epipe.sh
new file mode 100755
index 0000000..3e89158
--- /dev/null
+++ b/tests/misc/seq-epipe.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+# Test for proper detection of EPIPE with ignored SIGPIPE
+
+# Copyright (C) 2016-2018 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 <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ seq
+
+(trap '' PIPE && yes | :) 2>&1 | grep -qF 'Broken pipe' ||
+    skip_ 'trapping SIGPIPE is not supported'
+
+# upon EPIPE with signals ignored, 'seq' should exit with an error.
+timeout 10 sh -c \
+  'trap "" PIPE && { seq inf 2>err; echo $? >code; } | head -n1' >out
+
+# Exit-code must be 1, indicating 'write error'
+echo 1 > exp || framework_failure_
+compare exp out || fail=1
+compare exp code || fail=1
+
+grep '^seq: write error: ' err \
+  || { warn_ "seq emitted incorrect error on EPIPE"; \
+       cat err;\
+       fail=1; }
+
+Exit $fail