live: add additional error checks for shell run

Add checks for invalid arguments and permission errors.

src/live/ogOperations.py

@@ -381,6 +381,9 @@ class OgLiveOperations:
         cmd = request.getrun()
         is_inline = request.get_inline()
 
+        if not cmd:
+            raise OgError("No command provided for shell run")
+
         self._restartBrowser(self._url_log)
 
         if is_inline:
@@ -389,6 +392,9 @@ class OgLiveOperations:
             cmds = shlex.split(cmd)
             shell_path = '/opt/opengnsys/shell/'
 
+            if not cmds:
+                raise OgError("Parsed shell command list is empty")
+
             try:
                 shell_path_files = os.listdir(shell_path)
             except OSError as e:
@@ -404,6 +410,8 @@ class OgLiveOperations:
             else:
                 raise OgError(f'Script {cmds[0]} not found in {shell_path}')
 
+            if not os.path.isfile(cmds[0]) or not os.access(cmds[0], os.X_OK):
+                raise OgError(f"Command '{cmds[0]}' is not a valid executable")
         try:
             ogRest.proc = subprocess.Popen(
                 cmds,