A simple tool to attach to processes running on another terminal.

retty is a simple tool which will let you attach to a process currently running on another terminal. Unlike screen, you need to make no special provisions in advance - just get the process' pid and attach it anytime.

• Attach to any running process by PID
• No advance preparation needed (unlike screen/tmux)
• Escape sequences for detaching
• Support for custom file descriptors

make

retty [-v] [-h] [-0 fd] [-1 fd] [-2 fd] PID

• -v: Display version information
• -h: Display usage information
• -0 fd: Specify file descriptor for input (default: 0)
• -1 fd: Specify file descriptor for output (default: 1)
• -2 fd: Specify file descriptor for error output (default: 2)
• PID: Process ID to attach to

# Attach to process with PID 1234
retty 1234

# Attach to SSH process (which uses different file descriptors)
retty -0 4 -1 4 -2 4 1234

Use escape sequences to detach:

• Enter + ` + h for help
• Enter + ` + d to detach

• x86-specific and works only on Linux with executable stack
• Some applications may not work if they do I/O on /dev/tty
• Controlling terminal is not switched appropriately
• Must run with same uid as target process

• retty: Main attachment tool
• blindtty: Tool for running processes detached for later attachment

Written and maintained by Petr Baudis pasky@ucw.cz and Jan Sembera fis@bofh.cz.

• blindtty(1), screen(1)