alx-system_engineering-devops/0x05-processes_and_signals/101-manage_my_process at master · festusmaithyakcau/alx-system_engineering-devops · GitHub

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#!/usr/bin/env bash
# Manages the script manage_my_process.
#   When passed the argument `start`:
#     1. Starts manage_my_process
#     2. Creates a file containings its PID in /var/run/my_process.pid
#     3. Displays "manage_my_process started"
#   When passed the argument `stop`:
#     1. Stops manage_my_process
#     2. Deletes the file /var/run/my_process.pid
#     3. Displays "manage_my_process stopped"
#   When passed the argument `restart`:
#     1. Stops manage_my_process
#     2. Deletes the file /var/run/my_process.pid
#     3. Starts manage_my_process
#     4. Creates a file containing its PID in /var/run/my_process.pid
#     5. Displays "manage_my_process restarted"
#   If any other or no arguments are passed, displays
#+  "Usage: manage_my_process {start|stop|restart}"

if [ "$1" == "start" ]
then
  ./manage_my_process &
  echo $$ > /var/run/my_process.pid
  echo "manage_my_process started"

elif [ "$1" == "stop" ]
then
  kill "$(pgrep -f /manage_my_process)"
  rm /var/run/my_process.pid
  echo "manage_my_process stopped"

elif [ "$1" == "restart" ]
then
  kill "$(pgrep -f /manage_my_process)"
  rm /var/run/my_process.pid
  ./manage_my_process &
  echo $$ > /var/run/my_process.pid
  echo "manage_my_process restarted"

else
  echo "Usage: manage_my_process {start|stop|restart}"
fi