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-rw-r--r--collectors/charts.d.plugin/postfix/postfix.chart.sh87
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diff --git a/collectors/charts.d.plugin/postfix/postfix.chart.sh b/collectors/charts.d.plugin/postfix/postfix.chart.sh
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+# shellcheck shell=bash disable=SC1117
+# no need for shebang - this file is loaded from charts.d.plugin
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# netdata
+# real-time performance and health monitoring, done right!
+# (C) 2016 Costa Tsaousis <costa@tsaousis.gr>
+#
+
+# 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 "$postfix_postqueue" ] || [ ! -x "$postfix_postqueue" ]; then
+ # shellcheck disable=SC2230
+ postfix_postqueue="$(which postqueue 2>/dev/null || command -v postqueue 2>/dev/null)"
+ fi
+
+ if [ -z "$postfix_postqueue" ] || [ ! -x "$postfix_postqueue" ]; then
+ # shellcheck disable=SC2154
+ error "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_local.qemails '' "Postfix Queue Emails" "emails" queue postfix.queued.emails line $((postfix_priority + 1)) $postfix_update_every
+DIMENSION emails '' absolute 1 1
+CHART postfix_local.qsize '' "Postfix Queue Emails Size" "emails size in KB" queue postfix.queued.size area $((postfix_priority + 2)) $postfix_update_every
+DIMENSION size '' absolute 1 1
+EOF
+
+ return 0
+}
+
+postfix_update() {
+ # the first argument to this function is the microseconds since last update
+ # pass this parameter to the BEGIN statement (see bellow).
+
+ # do all the work to collect / calculate the values
+ # for each dimension
+ # remember: KEEP IT SIMPLE AND SHORT
+
+ # 1. execute postqueue -p
+ # 2. get the line that begins with --
+ # 3. match the 2 numbers on the line and output 2 lines like these:
+ # local postfix_q_size=NUMBER
+ # local postfix_q_emails=NUMBER
+ # 4. then execute this a script with the eval
+ #
+ # be very carefull with eval:
+ # prepare the script and always egrep at the end the lines that are usefull, so that
+ # even if something goes wrong, no other code can be executed
+ postfix_q_emails=0
+ postfix_q_size=0
+
+ eval "$(run "$postfix_postqueue" -p |
+ grep "^--" |
+ sed -e "s/-- \([0-9]\+\) Kbytes in \([0-9]\+\) Requests.$/local postfix_q_size=\1\nlocal postfix_q_emails=\2/g" |
+ grep -E "^local postfix_q_(emails|size)=[0-9]+$")"
+
+ # write the result of the work.
+ cat <<VALUESEOF
+BEGIN postfix_local.qemails $1
+SET emails = $postfix_q_emails
+END
+BEGIN postfix_local.qsize $1
+SET size = $postfix_q_size
+END
+VALUESEOF
+
+ return 0
+}