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Full Discussion: Serializing script Failing for more commands
Top Forums UNIX for Advanced & Expert Users Serializing script Failing for more commands Post 302408456 by nkamatam on Monday 29th of March 2010 02:23:17 PM
Old 03-29-2010
That command works with ksh - I am hoping it will work on Solaris also.

Code:
$ cp /etc/passwd testfile
$ grep -E abcd testfile | cat > testfile
$ cat testfile
abcd:x:100:100:ABCD,,,:/home/abcd:/bin/bash

I think the critical sections are those that are removing and adding lines to the queue.
That is,
Code:
echo $pid_line >> $queue_file

and
Code:
grep -vE $pid_line $queue_file | cat > $queue_file

I agree that inspite of my logic to re-add accidentally removed jobs back to the queue, there could be some problems.

But, I think this is what I have to go ahead with given the fact that there will never be more than 20 jobs at any given time - and anything more than this will be an overkill for the functional requirement that I have.

I am thinking writing some C program with named pipes when I have more time and money.

I am surprised that there is no easy way of doing this on Unix.

edit by bakunin: i provided the code-tags you surely have just forgotten - no problem, but please bring them with you the next time. Thank you.
Last edited by bakunin; 03-29-2010 at 05:07 PM..
 

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LEARN ABOUT PHP

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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