utils/cron-list.sh

#!/bin/bash

CRON_LIST=/data/config/$SRV_START_DIR/cron.cfg

trap 'echo -e "\033[31mSomething went wrong\033[0m"; exit 1' EXIT
set -e

export DEBIAN_FRONTEND=noninteractive

# Checking for the presence of the cron.list file
if [ ! -f $CRON_LIST ]; then
  echo "cron.cfg file not found!"
  exit 1
fi

# Reading current crontab jobs into a variable
current_crontab=$(crontab -l 2>/dev/null)

# Iterate through the lines of the cron.list file
while IFS= read -r line; do
  # Skip blank lines and comments
  if [[ -z "$line" || "$line" == \#* ]]; then
    continue
  fi

  # Checking if a job exists in the current crontab
  if echo "$current_crontab" | grep -Fq "$line"; then
    echo "The task already exists: $line"
  else
    # Adding a job to crontab
    (crontab -l; echo "$line") | crontab -
    echo "Task added: $line"
  fi
done < "$CRON_LIST"

trap - EXIT
echo "Cron add ok."