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-rwxr-xr-xtests/dd/stats.sh57
-rw-r--r--tests/local.mk1
2 files changed, 58 insertions, 0 deletions
diff --git a/tests/dd/stats.sh b/tests/dd/stats.sh
new file mode 100755
index 000000000..386752e77
--- /dev/null
+++ b/tests/dd/stats.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+# Check robust handling of SIG{INFO,USR1}
+
+# Copyright (C) 2014 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ dd
+
+env kill -l | grep '^INFO$' && SIGINFO='INFO' || SIGINFO='USR1'
+
+# This to avoid races in the USR1 case
+# as the dd process will terminate by default until
+# it has its handler enabled.
+trap '' $SIGINFO
+
+mkfifo_or_skip_ fifo
+
+for open in '' '1'; do
+ # Run dd with the fullblock iflag to avoid short reads
+ # which can be triggered by reception of signals
+ dd iflag=fullblock if=/dev/zero of=fifo count=100 bs=5000000 2>err & pid=$!
+
+ # Note if we sleep here we give dd a chance to exec and block on open.
+ # Otherwise we're probably testing SIG_IGN in the forked shell or early dd.
+ test "$open" && sleep .1
+
+ # dd will block on open until fifo is opened for reading.
+ # Timeout in case dd goes away erroneously which we check for below.
+ timeout 10 sh -c 'wc -c < fifo > nwritten' &
+
+ # Send lots of signals immediately to ensure dd not killed due
+ # to race setting handler, or blocking on open of fifo.
+ # Many signals also check that short reads are handled.
+ until ! kill -s $SIGINFO $pid 2>/dev/null; do
+ sleep .01
+ done
+
+ wait
+
+ # Ensure all data processed and at least last status written
+ grep '500000000 bytes .* copied' err || { cat err; fail=1; }
+done
+
+Exit $fail
diff --git a/tests/local.mk b/tests/local.mk
index 97bf5edda..8498acbbe 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -490,6 +490,7 @@ all_tests = \
tests/dd/stderr.sh \
tests/dd/unblock.pl \
tests/dd/unblock-sync.sh \
+ tests/dd/stats.sh \
tests/df/total-verify.sh \
tests/du/2g.sh \
tests/du/8gb.sh \