66-tools

66-olexec

66-olexec (open,lock and execute) opens the active (or specified) tty, locks it and executes a program.

Interface

    66-olexec [ -h ] [ -d tty ] program

This tool opens the active tty or the one specified by the -d modifier, locks it, and executes a program as a child process of that tty.

• It determines the active tty if the -d option is not specified.

• It closes the file descriptor stdin and stdout.

• It tries to open the tty with read/write permissions.

• It reopens stdout at the tty.

• It closes stderr and reopens it at the tty.

• It gets an exclusive advisory lock on the tty.

• It forks and executes program as child and waits until the program exits. If program crashes or get exited, 66-olexec sends a message to stderr with the exit code of the program.

• It releases the lock and exits.

Exit codes

• 0 success
• 100 wrong usage
• 111 system call failed

Options

• -h : prints this help.

• -d tty : specifies the tty to use in place of the active one. An absolute path is expected.

Usage example

    66-olexec -d /dev/tty3 cryptsetup open /dev/sda1 cryptroot