From d7ac5744b272ac348f3dcb21ea8a696f88a580a8 Mon Sep 17 00:00:00 2001
From: Michael Grote <michael.grote@posteo.de>
Date: Wed, 16 Jun 2021 12:21:45 +0200
Subject: [PATCH] samba

---
 samba | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 samba

diff --git a/samba b/samba
new file mode 100644
index 0000000..d277ad4
--- /dev/null
+++ b/samba
@@ -0,0 +1,87 @@
+#!@@GOODSH@@
+# -*- sh -*-
+
+: << =cut
+
+=head1 NAME
+
+samba - Plugin to monitor number of files held open by the CIFS clients
+
+=head1 CONFIGURATION
+
+This plugin uses the following configuration variables:
+
+ [samba]
+  user root
+  env.smbstatus /usr/bin/smbstatus
+  env.ignoreipcshare 1
+
+Usually "smbstatus" requires to be run as root (see "user root" above).
+
+Environment variables:
+
+ * smbstatus: path to "smbstatus" executable
+   (default: search PATH and fall back to /usr/bin/smbstatus)
+ * ignoreipcshare: set this variable to any non-empty value to ignore IPC$ when counting shares.
+
+=head1 AUTHOR
+
+Unknown author
+
+=head1 LICENSE
+
+GPLv2
+
+=head1 MAGIC MARKERS
+
+ #%# family=contrib
+ #%# capabilities=autoconf
+
+=cut
+
+SMBSTATUS=${smbstatus:-$(command -v smbstatus)}
+SMBSTATUS=${SMBSTATUS:-/usr/bin/smbstatus}
+
+if [ "$1" = "autoconf" ]; then
+	if [ -x "$SMBSTATUS" ]; then
+		if "$SMBSTATUS" -V >/dev/null 2>&1; then
+			echo 'yes'
+		else
+			echo "no (failed to run $SMBSTATUS - maybe need to run as 'root'?)"
+		fi
+	else
+		echo 'no (smbstatus not found)'
+	fi
+	exit 0
+fi
+
+if [ "$1" = "config" ]; then
+
+	echo 'graph_title Samba status'
+	echo 'graph_args -l 0'
+	echo 'graph_vlabel number'
+	echo 'graph_category samba'
+	echo 'proc.label processes'
+	echo 'lock.label locked files'
+	echo 'share.label Open shares'
+	# Bug pointed out by kozik: there is no max field.
+	# echo 'max.warning 900'
+	# echo 'max.critical 960'
+	exit 0
+fi
+
+$SMBSTATUS -p 2>/dev/null | awk 'BEGIN {lines=0} $1 ~ /^[0-9]+/ {lines++} END {print "proc.value " lines}'
+$SMBSTATUS -L 2>/dev/null | awk 'BEGIN {lines=0} $1 ~ /^[0-9]+/ {lines++} END {print "lock.value " lines}'
+if [ -n "${ignoreipcshare:-}" ]; then
+	# shellcheck disable=SC2016
+	IGNORE='$1=="IPC$" {next}'
+fi
+$SMBSTATUS -S 2>/dev/null | awk '
+	BEGIN {lines=0;state=0}
+	$1=="Service" && state==0 {state=1; next}
+	/^--*$/ && state==1 {state=2; next}
+	state < 2 {next}
+	/^$/ {next}
+	'"$IGNORE"'
+	{lines++}
+	END {print "share.value " lines}'