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Full Discussion: My Script For Process Checking is NOT Working
Top Forums Shell Programming and Scripting My Script For Process Checking is NOT Working Post 302628939 by radoulov on Tuesday 24th of April 2012 06:58:44 AM
Old 04-24-2012
Try printing the output of the ps command at the beginning of your script:

Code:
(ps -ef | grep [I]P-PoolSession-Summary.sh)

You'll see the current instance of your script.
Than try to invoke the script like this and compare the output:

Code:
bash <your_script_name>
ksh <your_script_name>

To elaborate further: you cannot only check the presence of your script in the process list for obvious reasons: your script
is running when you're running the ps .. | grep .. pipeline, so this thest will always return true.
If you count with ps .. | grep -c .. the output will depend on the shell implementation
(some shells thread differently the last command in a pipeline).

So, again, for a more robust solution, I'd suggest the implementation of some
locking mechanism.
Last edited by radoulov; 04-24-2012 at 08:14 AM..
 

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LEARN ABOUT X11R4

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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