From 298994f379bdc9ce6d75ceb1f6e15b4ba0476cb8 Mon Sep 17 00:00:00 2001
From: vandenboer <vandenboer@inuits.eu>
Date: Fri, 19 Mar 2021 15:19:07 +0100
Subject: [PATCH 1/4] Added check_nfs.sh for checking if the shares of an NFS
 server are mountable. Detects shares automatically

---
 check_nfs.sh | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100755 check_nfs.sh

diff --git a/check_nfs.sh b/check_nfs.sh
new file mode 100755
index 0000000..37ecb63
--- /dev/null
+++ b/check_nfs.sh
@@ -0,0 +1,83 @@
+#!/bin/sh
+#
+# Usage:
+# Requires showmound command from nfs-utils or nfs-common.
+# Checks the given host for NFS shares and tries to mount them.
+# If all shares are mountable or there are no shares then the exit code is 0
+# Exit code 1 means the system doesn't support NFS 
+# Exit code 2 means the showmount command is not found
+# Exit code 3 means one share couldn't be mounted
+
+host=''
+localdir='/tmp/nfs_test'
+exit_code=0
+
+usage() {
+echo "
+usage: $0 <option>
+-l local directory (default = /tmp/check_nfs)
+-h host (required)
+"
+exit -1
+}
+
+remove_error_file(){
+	if test -f /tmp/error_nfs; then
+		rm -rf /tmp/error_nfs
+	fi
+}
+
+while getopts 'l:h:' OPTION ;do
+	case $OPTION in
+
+		h) host=$OPTARG;;
+		l) localdir=$OPTARG;;
+		*) usage;;
+	esac
+done
+
+if [[ -z $localdir ]] || [[ -z $host ]]; then
+	usage
+fi
+
+
+
+if [[ -z $(ls /lib/modules/$(uname -r)/kernel/fs | grep nfs) ]]; then
+	echo "NFS not supported by system"
+	echo "Install nfs-utils and then try again"
+	exit 1
+else
+	echo "NFS supported"
+fi
+
+which showmount &>/dev/null || echo "Cannot find showmount command. Exiting..." || exit 2
+
+mkdir -p $localdir
+
+mount_points=( $(showmount -e $host | grep / | sed s,'*',,g) )
+
+if [[ -z $mount_points ]]; then
+	echo "No mounts detected. Exiting..."
+	exit 0
+fi
+
+set +e
+for mount_p in $mount_points; do
+	mkdir -p $localdir/$mount_p
+	nfs_command="mount -t nfs $host:$mount_p $localdir$mount_p"
+	echo "Testing nfs mount $mount_p"
+	sh -c "$nfs_command" 2>/tmp/error_nfs 1>/dev/null
+	if [ $? -ne 0 ]; then
+		echo "Failed to mount NFS share $mount_p: $(cat /tmp/error_nfs)"
+		remove_error_file
+		exit_code=3
+	else
+		echo "Succes mounting NFS share $mount_p"
+	fi
+	umount $localdir/$mount_p
+done
+
+echo "Cleaning up..."
+remove_error_file
+rm -rf $localdir
+exit $exit_code

From 09c559a806263bb5d3dc147eb5643c44d18137b4 Mon Sep 17 00:00:00 2001
From: vandenboer <vandenboer@inuits.eu>
Date: Fri, 19 Mar 2021 15:22:22 +0100
Subject: [PATCH 2/4] Updated README.md table

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index 21d2d0a..91d1576 100644
--- a/README.md
+++ b/README.md
@@ -408,6 +408,12 @@ An example Vagrant project has been included to get you started right away.
         <td><a href="https://github.com/maartenbeeckmans">maartenbeeckmans</a></td>
         <td><a href="https://github.com/newrelic/check_docker">upstream</a></td>
     </tr>
+    <tr>
+        <td>check_nfs</td>
+        <td><a href="https://github.com/vandenboer-git">vandenboer</a></td>
+        <td></td>
+    </tr>
+
 </table>
 
 ### Contributions

From 2845f7834bd103d58e0173b3e6b229aa1656f674 Mon Sep 17 00:00:00 2001
From: vandenboer <vandenboer@inuits.eu>
Date: Fri, 19 Mar 2021 15:24:52 +0100
Subject: [PATCH 3/4] Fixed spelling mistake showmound -> showmount

---
 check_nfs.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/check_nfs.sh b/check_nfs.sh
index 37ecb63..34583e5 100755
--- a/check_nfs.sh
+++ b/check_nfs.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 #
 # Usage:
-# Requires showmound command from nfs-utils or nfs-common.
+# Requires showmount command from nfs-utils or nfs-common.
 # Checks the given host for NFS shares and tries to mount them.
 # If all shares are mountable or there are no shares then the exit code is 0
 # Exit code 1 means the system doesn't support NFS 

From 995ee5b3e478fe4c682a997de3734547cb861153 Mon Sep 17 00:00:00 2001
From: vandenboer <vandenboer@inuits.eu>
Date: Fri, 19 Mar 2021 15:30:49 +0100
Subject: [PATCH 4/4] Added exit code 4 in case no shares are found on target
 host

---
 check_nfs.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/check_nfs.sh b/check_nfs.sh
index 34583e5..d23a955 100755
--- a/check_nfs.sh
+++ b/check_nfs.sh
@@ -3,10 +3,11 @@
 # Usage:
 # Requires showmount command from nfs-utils or nfs-common.
 # Checks the given host for NFS shares and tries to mount them.
-# If all shares are mountable or there are no shares then the exit code is 0
+# If all shares are mountable then the exit code is 0
 # Exit code 1 means the system doesn't support NFS 
 # Exit code 2 means the showmount command is not found
 # Exit code 3 means one share couldn't be mounted
+# Exit code 4 means there are no shares found
 
 host=''
 localdir='/tmp/nfs_test'
@@ -58,7 +59,7 @@ mount_points=( $(showmount -e $host | grep / | sed s,'*',,g) )
 
 if [[ -z $mount_points ]]; then
 	echo "No mounts detected. Exiting..."
-	exit 0
+	exit 4
 fi
 
 set +e