Fix issue #2515: Clean up temporary terminal files

emhttp/plugins/dynamix/Browse.page

@@ -1390,8 +1390,7 @@ function xlink(link) {
   }, function(isConfirm) {
     if (isConfirm === false) {
       // Terminal button was clicked (cancel button)
-      var d = new Date();
-      openTerminal('ttyd', 'File_Manager_' + d.getTime(), path);
+      openTerminal('ttyd', 'file.manager.terminal', path);
     }
     // Ok button (isConfirm === true) or dialog dismissed - just close
   });

emhttp/plugins/dynamix/include/OpenTerminal.php

@@ -40,6 +40,10 @@ function command($path,$file) {
   global $run,$wait,$rows;
   return (file_exists($file) && substr($file,0,strlen($path))==$path) ? "$run tail -f -n $rows '$file'" : $wait;
 }
+function sed_escape($s) {
+  // escape sed replacement meta characters: & and \
+  return str_replace(['\\', '&'], ['\\\\', '\\&'], $s);
+}
 switch ($_GET['tag']) {
 case 'ttyd':
   // check if ttyd already running
@@ -65,29 +69,36 @@ function command($path,$file) {
       $real_path = '/root';
     }
 
-    $name = unbundle($_GET['name']);
-    $exec = "/var/tmp/$name.run.sh";
+    // Set script variables
+    $unique_id = getmypid() . '_' . uniqid(); // prevent race condition with multiple terminals
+    $exec = "/var/tmp/file.manager.terminal.$unique_id.sh";
+    $profile = "/tmp/file.manager.terminal.$unique_id.profile";
     $escaped_path = str_replace("'", "'\\''", $real_path);
-    // Escape sed metacharacters: & (matched string), \\ (escape char), / (delimiter)
-    $sed_escaped = str_replace(['\\', '&', '/'], ['\\\\', '\\&', '\\/'], $escaped_path);
+    $sed_escaped = sed_escape($escaped_path);
+
+    // Get user's shell (same as standard terminal)
+    $user_shell = posix_getpwuid(0)['shell'];
 
     // Create startup script similar to ~/.bashrc
     // Note: We can not use ~/.bashrc as it loads /etc/profile which does 'cd $HOME'
+    // Note: Script deletes itself before exec (bash has already loaded the script into memory)
     $script_content = <<<BASH
 #!/bin/bash
 # Modify /etc/profile to replace 'cd \$HOME' with our target path
-sed 's#^cd \$HOME#cd '\''$sed_escaped'\''#' /etc/profile > /tmp/$name.profile
-source /tmp/$name.profile
+sed 's#^cd \$HOME#cd '\''$sed_escaped'\''#' /etc/profile > '$profile'
+source '$profile'
 source /root/.bash_profile 2>/dev/null
-rm /tmp/$name.profile
-exec bash --norc -i
+rm '$profile'
+# Delete this script and exec shell (bash has already loaded this into memory)
+{ rm -f '$exec'; exec $user_shell --norc -i; }
 BASH;
 
     file_put_contents($exec, $script_content);
     chmod($exec, 0755);
     exec("ttyd-exec -i '$sock' $exec");
+
+  // Standard login shell
   } else {
-    // Standard login shell
     if ($retval != 0) exec("ttyd-exec -i '$sock' '" . posix_getpwuid(0)['shell'] . "' --login");
   }
   break;