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Full Discussion: Shell script runs fine in Solaris, in Linux hangs at wait command
Top Forums Shell Programming and Scripting Shell script runs fine in Solaris, in Linux hangs at wait command Post 302467165 by aksaravanan on Thursday 28th of October 2010 11:34:57 AM
Old 10-28-2010
my apologizes for not using tag . and thanks for tagging.

1.
in both machines, i use ksh my program starts #!/bin/ksh , so it should override any shell is being used.

2. to answer the scenario , Robin's guess is right.
here is what i am doing

Code:
 
 
while read table, server_list
do
 
for server in server_list
do
do_somthing with table and server & # in background
done
wait # wait for all my background jobs to finish. 
echo now i can go and read next line 
 
done

now in my cash, wait started waiting for a zombie (unknown command, evetually a grep , sort) and never come out to read next line.

when i was trying to simplify the problem, i removed inner for loop , so my question looks awkward(stupid?)
technically, when i have while loop and have a wait command it shouldn't wait. ofcourse linux does something in background for while loops

i even used a intermediate file for doing sort and grep output and pass it on to while loop, but wait continue to hang.


again, when i started my config file with few lines, it was working fine in linux too. when i started adding more and more lines, it gave error

at one point, when i reduced row length from 260 char to 250 char , it worked too. but script still can work with line length exceeding more than 250 char when fewer lines were there. so i can't say this is the only scenario problem is exhibited.


could somebody help me to understand this..

thanks
AK
 

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LEARN ABOUT LINUX

service

service(8)						      System Manager's Manual							service(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
       directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT.  The  supported  values  of  COMMAND  depend  on  the
       invoked	script,  service  passes  COMMAND and OPTIONS it to the init script unmodified.  All scripts should support at least the start and
       stop commands.  As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the  start
       command.

       service --status-all runs all init scripts, in alphabetical order, with the status command.

EXIT CODES

       service calls the init script and returns the status returned by it.

FILES

       /etc/init.d
	      The directory containing System V init scripts.

ENVIRONMENT

       LANG, TERM
	      The only environment variables passed to the init scripts.

SEE ALSO

       /etc/init.d/skeleton,
       update-rc.d(8),
       init(8),
       invoke-rc.d(8).

								     Jan 2006								service(8)
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