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Full Discussion: ps -ef failing sometimes
Top Forums Shell Programming and Scripting ps -ef failing sometimes Post 302520643 by guycool on Sunday 8th of May 2011 10:04:32 PM
Old 05-08-2011
ps -ef failing sometimes
Hi Everyone,

we have a shell script "DLP_recv.sh" that has below command which is supposed to return the number of active instances of itself, which means of there is no other instance then commad would return 1 (for the current instance). The problem is that it sometimes it returns 0 which is unlikely because it should count its own instance. This happens rarely, does anyone have any idea, thanks in advance.
Code:
job_pattern="$0"
ps -ef|grep "${job_pattern}"|grep -v "grep ${job_pattern}" > /tmp/DLP_recv.$$

Regards.
Last edited by Franklin52; 05-09-2011 at 06:00 AM.. Reason: Please use code tags, thank you
 

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LEARN ABOUT MINIX

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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