Package org.jline.terminal.impl.exec


package org.jline.terminal.impl.exec
Implementation of terminal functionality using external command-line utilities.

This package provides implementations of terminal-related interfaces that rely on external command-line utilities (such as stty, tput, etc.) rather than native code or JNI libraries. This approach allows JLine to work in environments where native libraries are not available or cannot be used.

The key components in this package are:

  • ExecPty - A pseudoterminal implementation that uses external commands to interact with the terminal. It provides functionality for terminal attribute manipulation, size detection, and process control using standard Unix utilities.
  • ExecTerminalProvider - A terminal provider that creates terminals using the exec-based approach. It serves as a fallback when native terminal access is not available.

This package is particularly useful in the following scenarios:

  • When running on platforms where JLine's native libraries cannot be loaded
  • In restricted environments where JNI access is limited or prohibited
  • As a fallback mechanism when preferred terminal access methods fail
  • For debugging or testing terminal functionality without native dependencies

The implementations in this package execute external commands to perform operations such as:

  • Getting and setting terminal attributes (using stty)
  • Determining terminal size (using stty or tput)
  • Sending signals to processes
  • Creating and managing pseudoterminals

While this approach is more portable than native code, it may have performance implications due to the overhead of executing external processes. It is typically used as a fallback when more efficient methods are not available.

See Also: