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Full Discussion: Fail Parent Script if any of the child fails
Top Forums Shell Programming and Scripting Fail Parent Script if any of the child fails Post 302998956 by gvkumar25 on Saturday 10th of June 2017 04:11:40 AM
Old 06-10-2017
Thanks for your reply.
I don't want to exit the script if none of child process fails. I want to exit only if my child process fails.
I tried below code snippet more like your solution only.

Code:
files="test test2 "
pids=""
exit_counter=0
for i in $files; do
    ./test2 $i &
    p_pid="$!"
    echo "$i  process id is : $p_pid"
    pids+="$p_pid "
done
jobs -p
for pid in $pids; do
    wait $pid
    if [ $? -eq 0 ]; then
        echo "SUCCESS - Job $pid exited with a status of $?"
    else
        echo "FAILED - Job $pid exited with a status of $?"
        exit_counter=`expr "$exit_counter" + 1 `
        echo "EXIT COUNTER : $exit_counter"
    fi
done
if [ $exit_counter -ne 0 ]
then
  exit "$exit_counter"
fi

 

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LEARN ABOUT DEBIAN

wait

wait(3) 						     Library Functions Manual							   wait(3)

NAME

       wait - check child process status

SYNTAX

       #include <wait.h>

       int wait_nohang(&wstat);
       int wait_stop(&wstat);
       int wait_stopnohang(&wstat);
       int wait_pid(&wstat,pid);

       int wait_exitcode(wstat);
       int wait_crashed(wstat);
       int wait_stopped(wstat);
       int wait_stopsig(wstat);

       int pid;
       int wstat;

DESCRIPTION

       wait_nohang  looks  for	zombies (child processes that have exited).  If it sees a zombie, it eliminates the zombie, puts the zombie's exit
       status into wstat, and returns the zombie's process ID.	If there are several zombies, wait_nohang picks one.  If there are children but no
       zombies, wait_nohang returns 0.	If there are no children, wait_nohang returns -1, setting errno appropriately.

       wait_stopnohang is similar to wait_nohang, but it also looks for children that have stopped.

       wait_stop is similar to wait_stopnohang, but if there are children it will pause waiting for one of them to stop or exit.

       wait_pid waits for child process pid to exit.  It eliminates any zombie that shows up in the meantime, discarding the exit status.

       wait_stop and wait_pid retry upon error_intr.

STATUS PARSING

       If the child stopped, wait_stopped is nonzero; wait_stopsig is the signal that caused the child to stop.

       If the child exited by crashing, wait_stopped is zero; wait_crashed is nonzero.

       If the child exited normally, wait_stopped is zero; wait_crashed is zero; and wait_exitcode is the child's exit code.

SEE ALSO

       wait(2), error(3)

																	   wait(3)
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