Add daemon.sh.

t/lib/bash/daemon.sh

@@ -0,0 +1,72 @@
+#!/usr/bin/env bash
+
+TESTS=8
+
+TMPDIR="$TEST_TMPDIR"
+ON_EXIT=":"
+local file="$TMPDIR/pid-file"
+
+source "$LIB_DIR/log_warn_die.sh"
+source "$LIB_DIR/daemon.sh"
+
+cmd_ok \
+   "test ! -f $file" \
+   "PID file doesn't exist"
+
+make_pid_file $file $$
+
+cmd_ok \
+   "test -f $file" \
+   "PID file created"
+
+local pid=`cat $file`
+is \
+   "$pid" \
+   "$$" \
+   "Correct PID"
+
+remove_pid_file $file
+
+cmd_ok \
+   "test ! -f $file" \
+   "PID file removed"
+
+is \
+   "$ON_EXIT" \
+   ":; remove_pid_file $file" \
+   "Sets ON_EXIT to remove PID file"
+
+# ###########################################################################
+# PID file already exists and proc is running.
+# ###########################################################################
+ON_EXIT=""
+echo $$ > $file
+
+(
+   make_pid_file $file $$ >$TMPDIR/output 2>&1
+)
+
+cmd_ok \
+   "grep -q \"PID file /tmp/percona-toolkit.test/pid-file already exists and its PID ($$) is running\" $TMPDIR/output" \
+   "Does not overwrite PID file is PID is running"
+
+echo 999999 > $file
+
+make_pid_file $file $$ >$TMPDIR/output 2>&1
+
+cmd_ok \
+   "grep -q 'Overwriting PID file /tmp/percona-toolkit.test/pid-file because its PID (999999) is not running' $TMPDIR/output" \
+   "Overwrites PID file if PID is not running"
+
+pid=`cat $file`
+is \
+   "$pid" \
+   "$$" \
+   "Correct PID"
+
+rm $file
+rm $TMPDIR/output
+
+# ###########################################################################
+# Done.
+# ###########################################################################