How to kill respawned process by init in linux

bash shell kernel tty
user2857290 picture user2857290 · Jan 9, 2014 · Viewed 10.8k times · Source

am respawning the /bin/bash on ttyS1 port.ttyS0 is my console. inittab entry is given below.

::respawn:/bin/bash < /dev/ttyS1 > /dev/ttyS1 2> /dev/ttyS1

My question is how to disable/kill respwning so that i can use serial port for other application.

Answer

leu picture leu · Jan 12, 2014

You can kill that bash process like other processes. However, init respawns it immediately - nothing gained.

To disable the process you have to edit /etc/inittab and comment out that line. To inform init about this change you have to send a SIGHUP to init: kill -HUP pid-of-init. (I think that pid-of-init is always 1).

If you need your bash connected to ttyS1 in some circumstances you may want to specify certain runlevels in which init should start bash.

Hope this answer helps... (see man inittab for further information)

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