1 files changed, 106 insertions, 0 deletions
diff --git a/tests/ts/misc/flock b/tests/ts/misc/flock
new file mode 100755
index 0000000..6b8edfa
--- /dev/null
+++ b/tests/ts/misc/flock
@@ -0,0 +1,106 @@
+#!/bin/bash
+
+# This file is part of util-linux.
+#
+# This file 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 2 of the License, or
+# (at your option) any later version.
+#
+# This file 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.
+
+TS_TOPDIR="${0%/*}/../.."
+TS_DESC="flock"
+
+. $TS_TOPDIR/functions.sh
+ts_init "$*"
+
+ts_check_test_command "$TS_CMD_FLOCK"
+ts_check_prog "pgrep"
+ts_check_prog "timeout"
+
+
+function do_lock {
+	local opts="$1"
+	local expected_rc="$2"
+	local mesg="$3"
+
+	$TS_CMD_FLOCK $1 $TS_OUTDIR/lockfile \
+		echo "$mesg" \
+		>> $TS_OUTPUT 2>> $TS_ERRLOG
+
+	local rc="$?"
+
+	if [  "$rc" == "$expected_rc" ]; then
+		ts_log "Success"
+	else
+		ts_log "Failed [rc=$rc]"
+	fi
+}
+
+# general lock
+GEN_OUTPUT="$TS_OUTPUT"
+START=$(date '+%s')
+# running flock in background is not the best usage example
+$TS_CMD_FLOCK --shared $TS_OUTDIR/lockfile \
+	bash -c 'echo "Locking"; sleep 3; echo "Unlocking"' \
+	> $GEN_OUTPUT 2>&1 &
+pid=$!
+
+# check for running background process
+if [ "$pid" -le "0" ] || ! kill -s 0 "$pid" &>/dev/null; then
+	ts_die "unable to run flock"
+fi
+# the lock should be established when flock has a child
+timeout 1s bash -c "while ! pgrep -P $pid >/dev/null; do sleep 0.1 ;done" \
+	|| ts_die "timeout waiting for flock child"
+
+ts_init_subtest "non-block"
+do_lock "--nonblock --conflict-exit-code 123" 123 "You will never see this!"
+ts_finalize_subtest
+
+
+ts_init_subtest "no-fork"
+do_lock "--no-fork --nonblock --conflict-exit-code 123" 123 "You will never see this!"
+ts_finalize_subtest
+
+
+ts_init_subtest "shared"
+do_lock "--shared" 0 "Have shared lock"
+ts_finalize_subtest
+
+
+# this is the same as non-block test (exclusive lock is the default), but here
+# we explicitly specify --exclusive on command line
+ts_init_subtest "exclusive"
+do_lock "--nonblock --exclusive --conflict-exit-code 123" 123 "You will never see this!"
+ts_finalize_subtest
+
+
+ts_init_subtest "timeout"
+do_lock "--timeout 5 --conflict-exit-code 5" 0 "After timeout."
+END=$(date '+%s')
+ts_finalize_subtest
+
+
+# expected is 3 seconds (see "sleep 3" for the general lock), but we should not
+# rely on exact number due to scheduler, machine load, etc. Let's check for
+# inmterval <3,5>.
+#
+ts_init_subtest "time-check"
+TIMEDIFF=$(( $END - $START ))
+if [ $TIMEDIFF -lt 3 ]; then
+	ts_log "general lock failed [$TIMEDIFF sec]"
+elif [ $TIMEDIFF -gt 5 ]; then
+	ts_log "wait too long [$TIMEDIFF sec]"
+else
+	ts_log "success"
+fi
+ts_finalize_subtest "diff ${TIMEDIFF} sec"
+
+
+echo "Unlocked" >> $GEN_OUTPUT
+ts_finalize