works on command line but not in bash script

tara · 05-04-2006, 01:44 AM

Hi

(lets say i want to kill the kwrite application)

if i run the following on the command line:

kill -s SIGINT `ps -C kwrite -o pid h`

but if i put that exact line in a script i get the following error:
kill: SIGINT: invalid signal specification

and the command doesn't work

do anyone know why or how to fix.

thanks
Tara

p.s. using #!/bin/sh

zulfilee · 05-04-2006, 01:52 AM

SIGINT is interrupt from keyboard
That can be one reason why it is not working non-interactively.

tara · 05-04-2006, 02:01 AM

thanks zulfilee

is there any way to send keyboard signals from a script, i don't really want to kill the process using the kill command directly hence why trying SIGINT. SIGINT provides a clean way of shutting down the other related processes.

Tara

ioerror · 05-04-2006, 07:41 AM

Quote:

SIGINT is interrupt from keyboard
That can be one reason why it is not working non-interactively.

Doesn't matter, kill can send any signal.

The problem is that you don't need the SIG, just use kill -s INT ...

nx5000 · 05-04-2006, 07:47 AM

killall -TERM kwrite
if it has been blocked by the application, then
killall -KILL kwrite

tara · 05-04-2006, 06:05 PM

thanks guys

both ways worked perfectly

cheers

Tara

ravisingla · 02-08-2009, 11:50 PM

Quote:

Originally Posted by nx5000

killall -TERM kwrite
if it has been blocked by the application, then
killall -KILL kwrite

I am trying to send SIGUSR1 from a c programm
system("kill -SIGUSR1 'cat /var/run/process.pid'");
but facing the same problem i.e. i am getting error invalid signal specification
But from konsole if I try to send then does not give any problem.. Can you please help whats wrong with this??

kauuttt · 02-09-2009, 03:57 AM

Quote:

Originally Posted by ravisingla

I am trying to send SIGUSR1 from a c programm
system("kill -SIGUSR1 'cat /var/run/process.pid'");
but facing the same problem i.e. i am getting error invalid signal specification
But from konsole if I try to send then does not give any problem.. Can you please help whats wrong with this??

try kill function...
kill(int pid, int signal);