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If I want to have more than 2 key sequence for binding to the suspend signal, how would I do that? To clarify, Ctrlz is for suspending. But if I want Ctrlz and a k with the previous 2 keys depressed to perform the same function, how would I do that?
I have tried various combos w success. For eg:
stty susp \^ZV
I use a tty terminal so emulators like xterm will not help in my case.
stty susp tells the terminal driver what character (actually what byte), when received unescaped from the terminal (via the wire if a real terminal, or written to the master side of a pseudo-terminal in case of a terminal emulator or sshd...), when ISIG is on, causes a SIGTSTP to be sent to the foreground job.
There's no key or keyboard involved here. It's the ^Z character by default (0x1a). xterm and other terminal emulators generally send that character when you press Z while holding the Ctrl key.
If you want to make it harder to suspend a process, you could configure your terminal emulator so that it doesn't send ^Z upon Ctrl+Z, but upon some other key combination. With xterm:
xterm -xrm 'XTerm.VT100.translations: #override \
Ctrl Shift <KeyPress> X: string(0x1a)\nCtrl <KeyPress> Z:'
Sends the ^Z character upon pressing Ctrl+Shift+X, not upon Ctrl-Z. With xterm, I don't think you can specify arbitrary key combinations, you can only use modifier keys like Ctrl or Shift.
Of course, you could also define a different byte for stty susp and have xterm send it on a different key combination.
Note that you probably don't want to make it a byte over 0x7f as those would appear in different UTF-8 characters.
stty susp \^K , then I would have changed it to Ctrl K. Is there a wayI can do it using stty instead of xterm?
stty susp \^K, same as stty susp $'\xb', you're telling the terminal driver to suspend upon the 0xb character. That character is usually sent by xterm upon pressing Ctrl+K, but you can configure xterm to send it upon a different event.
Feb 5, 2014 at 20:07
man 5 keymap).
Jun 19, 2014 at 9:59