Alexander Schäferdiek
0ee7b03df8
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74 lines
1.6 KiB
Bash
Executable file
74 lines
1.6 KiB
Bash
Executable file
#!/usr/bin/env bash
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# usage
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usage() {
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USAGE=$(cat <<EOF
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Usage: check_updates [CONFIG_FILE (absolute path)]
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If no CONFIG_FILE is given, HOME/.check_updates.conf or /etc/check_updates.conf is used. This fallback option
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has to exist or the script will exit.
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Configuration can be done in any file and any pre-defined variable can be overwritten.
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The following are at least required for the script to work:
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- CHECK_UPDATES_MAIL_ADDRESS="" // mail.rc has to be configured
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You can copy this script to '/usr/local/bin' and use create a custom CONFIG_FILE as user. Examples can be found in '/usr/share/doc/<scriptname>'.
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EOF
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)
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echo "$USAGE";
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}
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set -e;
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HOSTNAME=$(hostname)
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UPDATES=$(/usr/bin/checkupdates)
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UPDATES_AMOUNT=$(/usr/bin/checkupdates|wc -l)
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CHECK_UPDATES_MAIL_ADDRESS="";
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# check for config file
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apply_config() {
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local config=$1;
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if [[ ! -f "$config" ]]; then
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echo "No config file specified";
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echo "";
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usage;
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exit 1;
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fi
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set -a;
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# shellcheck disable=SC1090
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source "$config";
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set +a;
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}
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source_config() {
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local config=$1;
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local configFallback=$2;
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local configGlobalFallback=$3;
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if [[ -f "$config" ]]; then
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apply_config "$config";
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return;
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fi
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if [[ -f "$configFallback" ]]; then
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apply_config "$configFallback";
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return;
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fi
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if [[ -f "$configGlobalFallback" ]]; then
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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/.check_updates.conf" "/etc/check_updates.conf"
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if [ "$UPDATES_AMOUNT" -gt "0" ]; then
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mailx -s "[updates $HOSTNAME]" "$CHECK_UPDATES_MAIL_ADDRESS" << EOF
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There are $UPDATES_AMOUNT updates available on $HOSTNAME.
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$UPDATES
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EOF
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fi
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