Staus of Background jobs

sathyaram_s · #1 (**permalink**) 10-21-04, 15:08

In my ksh script, I'm iinvoking two background jobs ...

I want the script to check the status of the jobs and if one of them returns a non-zero error code, it should come out of the wait state and return a non-zero value ...

I have tried using wait but am missing something ..

Thanks in advance for any help ..

Cheers
Sathyaram

n_i · #2 (**permalink**) 10-21-04, 17:01

Here's one of the solutions that I think should work:

Code:

#!/usr/bin/ksh
# envelope for the background command 1
bk1() {
  command1
  # send SIGUSR1 to ourselves if command1 returns non-zero code
  test $? -ne 0 && kill -USR1 $$
}
bk2 () {
  command2
  test $? -ne 0 && kill -USR1 $$
}
# trap SIGUSR1
trap "print "Abort" && exit -1" USR1
# start background processes
bk1&
PID1=$!
bk2&
PID2=$!
# wait on background processes; 
# if we receive SIGUSR1 the wait will be interrupted
wait $PID1 $PID2
print "wait returned " $?

n_i · #3 (**permalink**) 10-21-04, 17:08

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n_i · #4 (**permalink**) 10-21-04, 17:09

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