61 lines
1.7 KiB
Bash
Executable file
61 lines
1.7 KiB
Bash
Executable file
#! /bin/bash
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# This script updates the apt database if running as root and retrieves the number of upgradable packages.
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# If the count is high enough or if some important packages can be upgraded, inform the administrator.
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while getopts ":c:p:h" option; do
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case ${option} in
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c )
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trigger_count=$OPTARG
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;;
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p )
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# Add each matching option to the array
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key_packages+=("$OPTARG")
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;;
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h | \? | : )
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echo "Usage : AptUpdateWatcher [-c count] [-p package matching regex] [-h] [-?]"
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echo " -c : Change the minimum count of upgradable packages before sending a warning"
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echo " -p : Add an expression to watch for important packages. If a package matching this option is found, send a warning"
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echo " -h/-? : Prints this message"
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exit 1
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;;
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esac
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done
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# Use default options if nothing provided
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if [ -z "$trigger_count" ]; then
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trigger_count=20
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fi
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if [ -z "$key_packages" ]; then
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key_packages=( "ssh" "ssl" "apache" "kernel" )
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fi
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if [ "$EUID" -eq 0 ]; then
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apt-get update
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fi
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upgradable_packages="$(apt-get -s -V upgrade | grep -e'=>')"
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upgradable_count=$(echo "$upgradable_packages" | wc -l)
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if [ $upgradable_count -gt $trigger_count ]; then
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output="There are more than $trigger_count packages ready to upgrade ($upgradable_count packages):\n"
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output+="$upgradable_packages\n\n"
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fi
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for expression in "${key_packages[@]}"; do
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matching_packages=$(echo "$upgradable_packages" | grep -e"$expression")
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if [ -n "$matching_packages" ]; then
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output+="Packages matching the expression '""$expression""' can be upgraded: \n"
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output+="$matching_packages\n\n"
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fi
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done
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if [ -n "$output" ]; then
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output="The Apt Update Watcher has been triggered.\n\n""$output"
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echo -e "$output" # Can be replaced by anything or piped into sendmail
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fi
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