Script Signal Processing Post: 302263303

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Top Forums Shell Programming and Scripting Script Signal Processing Post 302263303 by mejones99 on Monday 1st of December 2008 09:12:20 AM

12-01-2008

Registered User

Script Signal Processing

I am trying to develop a script that will properly handle kill signals particularly kill -2. I have program (_progres) that properly receives the signal if I run it from the command line directly:
_progres -T /tmp -p /home/mejones/signal.p -b 2>&1 &

If I try to put it in a script (i.e. start_signal.sh) that contains:

#!/bin/bash
echo "starting signal.p...."
exec $DLC/bin/_progres -T /tmp -p /home/mejones/signal.p -b 2>&1 &

the kill -2 does NOT get received by _progres and I can only kill the script with kill -15.

I have tried start_signal.sh with both sh and bash.

Does anyone have any suggestions on why the script signal behaviour is different then when called from the command line? I am assuming that the issue would be with the script insulating the signals from getting to _progres, but I may be wrong.

Thanks in Advance for you responses.

mejones99

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LEARN ABOUT V7

kill

KILL(2) 							System Calls Manual							   KILL(2)

NAME

       kill  -	send signal to a process

SYNOPSIS

       kill(pid, sig);

DESCRIPTION

       Kill sends the signal sig to the process specified by the process number in r0.	See signal(2) for a list of signals.

       The sending and receiving processes must have the same effective user ID, otherwise this call is restricted to the super-user.

       If the process number is 0, the signal is sent to all other processes in the sender's process group; see tty(4).

       If the process number is -1, and the user is the super-user, the signal is broadcast universally except to processes 0 and 1, the scheduler
       and initialization processes, see init(8).

       Processes may send signals to themselves.

SEE ALSO

       signal(2), kill(1)

DIAGNOSTICS

       Zero is returned if the process is killed; -1 is returned if the process does not have the same effective user  ID  and	the  user  is  not
       super-user, or if the process does not exist.

ASSEMBLER

       (kill = 37.)
       (process number in r0)
       sys kill; sig

																	   KILL(2)