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Full Discussion: background process return code
Top Forums Shell Programming and Scripting background process return code Post 302076203 by Vikas Sood on Friday 9th of June 2006 04:05:11 PM
Old 06-09-2006
background process return code
Hi
I have the following piece of code that is calling another child process archive.ksh in the background

while read file;
do
file_name=`ls $file`;
ksh archive.ksh $file_name &;
done < $indirect_file

The problem is, indirect_file may contain anwhere from 2 to 20 different filenames and archive.ksh takes only one file name at a time (that is a limitation). So based on the number of files in indirect_file, i shall run those many background processes for archive.ksh.

I need to check for the completion of all archive.ksh jobs that i fired in the background and only if all the bg jobs are successful, i need to make this process pass otherwise I abort it.

I found that there is a wait command that will wait for bg jobs to finish..Can I use it? if yes, how do i overcome following prob :

1. How do I specify the job id or pid to wait command when I dont know it beforehand?

2. I have heard that there is a restriction on the number of jobs you can fire? What is the number?

Any ideas??

Thanks
 

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LEARN ABOUT SUNOS

suspend

suspend(1)							   User Commands							suspend(1)

NAME

       suspend - shell built-in function to halt the current shell

SYNOPSIS

   sh
       suspend

   csh
       suspend

   ksh
       suspend

DESCRIPTION

   sh
       Stops the execution of the current shell (but not if it is the login shell).

   csh
       Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.

   ksh
       Stops the execution of the current shell (but not if it is the login shell).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)

SunOS 5.10							    15 Apr 1994 							suspend(1)
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