1 files changed, 92 insertions, 0 deletions
diff --git a/charts.d/postfix.chart.sh b/charts.d/postfix.chart.sh
new file mode 100755
index 00000000..d286f99f
--- /dev/null
+++ b/charts.d/postfix.chart.sh
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+# the postqueue command
+# if empty, it will use the one found in the system path
+postfix_postqueue=
+
+# how frequently to collect queue size
+postfix_update_every=15
+
+postfix_priority=60000
+
+postfix_check() {
+	# this should return:
+	#  - 0 to enable the chart
+	#  - 1 to disable the chart
+
+	# try to find the postqueue executable
+	if [ -z "$postfix_postqueue" -o ! -x "$postfix_postqueue" ]
+	then
+		postfix_postqueue="`which postqueue 2>/dev/null`"
+		if [ -z "$postfix_postqueue" -o ! -x "$postfix_postqueue" ]
+		then
+			local d=
+			for d in /sbin /usr/sbin /usr/local/sbin
+			do
+				if [ -x "$d/postqueue" ]
+				then
+					postfix_postqueue="$d/postqueue"
+					break
+				fi
+			done
+		fi
+	fi
+
+	if [ -z "$postfix_postqueue" -o ! -x  "$postfix_postqueue" ]
+	then
+		echo >&2 "$PROGRAM_NAME: postfix: cannot find postqueue. Please set 'postfix_postqueue=/path/to/postqueue' in $confd/postfix.conf"
+		return 1
+	fi
+
+	return 0
+}
+
+postfix_create() {
+cat <<EOF
+CHART postfix.qemails '' "Postfix Queue Emails" "emails" queue postfix.queued.emails line $[postfix_priority + 1] $postfix_update_every
+DIMENSION emails '' absolute 1 1
+CHART postfix.qsize '' "Postfix Queue Emails Size" "emails size in KB" queue postfix.queued.size area $[postfix_priority + 2] $postfix_update_every
+DIMENSION size '' absolute 1 1
+EOF
+
+	return 0
+}
+
+postfix_update() {
+	# the first argument to this function is the microseconds since last update
+	# pass this parameter to the BEGIN statement (see bellow).
+
+	# do all the work to collect / calculate the values
+	# for each dimension
+	# remember: KEEP IT SIMPLE AND SHORT
+
+	# 1. execute postqueue -p
+	# 2. get the line that begins with --
+	# 3. match the 2 numbers on the line and output 2 lines like these:
+	#    local postfix_q_size=NUMBER
+	#    local postfix_q_emails=NUMBER
+	# 4. then execute this a script with the eval
+	#
+	# be very carefull with eval:
+	# prepare the script and always egrep at the end the lines that are usefull, so that
+	# even if something goes wrong, no other code can be executed
+	postfix_q_emails=0
+	postfix_q_size=0
+
+	eval "`$postfix_postqueue -p |\
+		grep "^--" |\
+		sed -e "s/-- \([0-9]\+\) Kbytes in \([0-9]\+\) Requests.$/local postfix_q_size=\1\nlocal postfix_q_emails=\2/g" |\
+		egrep "^local postfix_q_(emails|size)=[0-9]+$"`"
+
+	# write the result of the work.
+	cat <<VALUESEOF
+BEGIN postfix.qemails $1
+SET emails = $postfix_q_emails
+END
+BEGIN postfix.qsize $1
+SET size = $postfix_q_size
+END
+VALUESEOF
+
+	return 0
+}