iu

Author: wandexdev

0x05-processes_and_signals/101-manage_my_process

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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 [ "${1}" == "start" ]
+then
+    ./manage_my_process &
+    touch /var/run/my_process.pid
+    echo "$!" > /var/run/my_process.pid
+    echo "manage_my_process started"
+elif [ "${1}" == "stop" ]
+then
+    echo "manage_my_process stopped"
+    kill "$(cat /var/run/my_process.pid)"
+    rm /var/run/my_process.pid
+elif [ "${1}" == "restart" ]
+then
+    kill "$(cat /var/run/my_process.pid)"
+    rm /var/run/my_process.pid
+    ./manage_my_process &
+    touch /var/run/my_process.pid
+    echo "$!" > /var/run/my_process.pid
+    echo "manage_my_process restarted"
+else
+    echo "Usage: manage_my_process {start|stop|restart}"
+fi