system-helpers/usr/local/bin/disk_space_alert

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#!/usr/bin/env bash
# usage
usage() {
USAGE=$(cat <<EOF
Usage: disk_space_alert [CONFIG_FILE (absolute path)]
Checks available diskspace for configured **mounts** and sends out a mail if certain limits are reached. Please see man disk_space_alert.
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EOF
)
echo "$USAGE";
}
set -e;
HOSTNAME=$(hostname)
DISK_SPACE_ALERT_MAIL_ADDRESS="";
DISK_SPACE_ALERT_THRESHOLD=93
DISK_SPACE_ALERT_MOUNTPOINTS=("/")
# check for config file
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apply_config() {
local config=$1;
if [[ ! -f "$config" ]]; then
echo "No config file specified";
echo "";
usage;
exit 1;
fi
set -a;
# shellcheck disable=SC1090
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source "$config";
set +a;
}
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source_config() {
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local config=$1;
local configFallback=$2;
local configGlobalFallback=$3;
if [[ -f "$config" ]]; then
apply_config "$config";
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return;
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fi
if [[ -f "$configFallback" ]]; then
apply_config "$configFallback";
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return;
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fi
if [[ -f "$configGlobalFallback" ]]; then
apply_config "$configGlobalFallback";
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return;
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fi
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}
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source_config "$1" "$HOME/.disk_space_alert.conf" "/etc/disk_space_alert.conf"
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for point in "${DISK_SPACE_ALERT_MOUNTPOINTS[@]}"
do
CURRENT=$(df "$point" | grep "$point" | awk '{ print $5}' | sed 's/%//g')
CURRENT_SPACE=$(df "$point" | grep "$point" | awk '{ print $5}' | sed 's/%//g')
CURRENT_INODES=$(df -i "$point" | grep "$point" | awk '{ print $5}' | sed 's/%//g')
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if [ "$CURRENT" -gt "$DISK_SPACE_ALERT_THRESHOLD" ] ; then
mailx -s "[disk $HOSTNAME] $point" "$DISK_SPACE_ALERT_MAIL_ADDRESS" << EOF
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Your $point partition remaining free space is critically low. Used space: $CURRENT_SPACE%. Used inodes: $CURRENT_INODES%.
EOF
fi
done