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Amend to better cron checking.

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Aterfax 2024-03-26 21:42:37 +00:00
parent 99b22f0ec0
commit f19922c23c
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1 changed files with 4 additions and 3 deletions
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7
docker/src/s6-services/cron-backup/run
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@ -22,8 +22,9 @@ trap handle_error ERR
validate_cron_expression() {
local cron_expression="$1"
# https://stackoverflow.com/a/57639657
local regex='(@(annually|yearly|monthly|weekly|daily|hourly|reboot))|(@every (\d+(ns|us|µs|ms|s|m|h))+)|((((\d+,)+\d+|(\d+(\/|-)\d+)|\d+|\*) ?){5,7})'
# https://stackoverflow.com/a/63729682
# https://regex101.com/r/oGYmrm/1
local regex='^((((\d+,)+\d+|(\d+(\/|-|#)\d+)|\d+L?|\*(\/\d+)?|L(-\d+)?|\?|[A-Z]{3}(-[A-Z]{3})?) ?){5,7})|(@(annually|yearly|monthly|weekly|daily|hourly|reboot))|(@every (\d+(ns|us|µs|ms|s|m|h))+)$'
if echo "$cron_expression" | grep -Pq "$regex"; then
return 0 # Valid cron expression
@ -34,7 +35,7 @@ validate_cron_expression() {
if ! validate_cron_expression "$CRON_SCHEDULE"; then
echo -e "Invalid cron expression: $CRON_SCHEDULE \n"
echo "Please define a valid cron time expression for CRON_SCHEDULE, e.g. \"*/5 * * * *\" "
echo "Please define a valid cron time expression for CRON_SCHEDULE, e.g. \"*/5 * * * *\" as defined by https://regex101.com/r/oGYmrm/1"
sleep 60
exit 1
fi