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Shell Programming and Scripting

shell script for getting pid of spawn processes from shell

 
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Old 04-21-2009
$! can be interpreted as run previous command again, depending on the shell, so is not PID related.

If I was killing off all the child processes I would do something like:
Code:
for PROC in `ps -ef | grep " $$ " | grep -v $0 | grep -v grep | awk '{ print $2 }'`; do
  if [ -n "${PROC}" -a ${PROC} -ne 1 ]; then
    kill $PROC
  fi
done

As far as getting child PIDs into an array I'll leave that for a more experienced scripting guru!
 
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LEARN ABOUT HPUX

wait

wait(1) 						      General Commands Manual							   wait(1)

NAME

       wait - await process completion

SYNOPSIS

       [pid]

DESCRIPTION

       If  no argument is specified, waits until all processes (started with of the current shell have completed, and reports on abnormal termina-
       tions.  If a numeric argument pid is given and is the process ID of a background process, waits until that process has  completed.   Other-
       wise, if pid is not a background process, exits without waiting for any processes to complete.

       Because the system call must be executed in the parent process, the shell itself executes without creating a new process (see wait(2)).

   Command-Line Arguments
       supports the following command line arguments:

	      The unsigned decimal integer process
			  ID of a command, whose termination is to wait for.

WARNINGS

       Some processes in a 2-or-more-stage pipeline may not be children of the shell, and thus cannot be waited for.

SEE ALSO

       csh(1), ksh(1), sh-posix(1), sh(1), wait(2).

STANDARDS CONFORMANCE

																	   wait(1)