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Top Forums Shell Programming and Scripting Odd results when my script runs from cron.. Post 302772447 by Marc G on Monday 25th of February 2013 03:26:32 PM
Old 02-25-2013
Odd results when my script runs from cron..

Hi folks,

So I wrote a script to run "top", "awk" out values fro the "top" and send the results to a data file.

I then set it to run in cron every 15 minutes.

Now I'm noticing that the script, and it's sub-commands are not always cleanly finishing and, in my investigations, I am also noticing that the script is launching differently than expected from cron. Some of this evidence comes from my ps, which shows processes lingering after completing as shown here:
Code:
     UID   PID  PPID   C    STIME TTY         TIME CMD
    root 26793   287   0   Feb 21 ?           0:00 sh -c /usr/apps/client/bin/gatherOSKPI.sh
    root 26853 26796  45   Feb 21 ?        6539:10 /usr/apps/client/bin/top -n 1 -q
    root 26859 26796   0   Feb 21 ?           0:00 /usr/bin/sed s/^[       ]*//;s/[        ]*$//
    root 26857 26796   0   Feb 21 ?           0:00 /usr/bin/awk -F; {print $2}
    root 26796 26793   0   Feb 21 ?           0:00 /bin/ksh /usr/apps/client/bin/gatherOSKPI.sh
    root 26854 26796   0   Feb 21 ?           0:00 /usr/bin/head -n 5
    root 26858 26796   0   Feb 21 ?           0:00 /usr/bin/awk -F: {print $2}
    root 26858 26796   0   Feb 21 ?           0:00 /usr/bin/awk -F: {print $2}
   root 26858 26796   0   Feb 21 ?           0:00 /usr/bin/awk -F: {print $2}
    root 23755 23721   0   Feb 23 ?           0:00 /usr/bin/awk -F, {print $3,$4}
    root 23721 23720   0   Feb 23 ?           0:00 /bin/ksh /usr/apps/client/bin/gatherOSKPI.sh
    root 23748 23721  46   Feb 23 ?        3300:18 /usr/apps/client/bin/top -n 1 -q
    root 23720   287   0   Feb 23 ?           0:00 sh -c /usr/apps/client/bin/gatherOSKPI.sh
    root 23756 23721   0   Feb 23 ?           0:00 /usr/bin/awk -F  {print $1","$4}
    root 23751 23721   0   Feb 23 ?           0:00 /usr/bin/head -n 5

Note that sometimes the script is launched with the flag "-c", other times not, and once preceded by "/bin/ksh"

The awk and head output are due to commands in the script.

Can anyone suggest why this behavior occurs?
Largely, I am being given a chance to advance, but need to find why these processes are not ending once their run is complete

Thanks in advance,

Marc
 

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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe name ... DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``gzexe /usr/bin/gdb'' it will create the following two files: -rwxr-xr-x 1 root root 1026675 Jun 7 13:53 /usr/bin/gdb -rwxr-xr-x 1 root root 2304524 May 30 13:02 /usr/bin/gdb~ /usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing executable file. You can remove /usr/bin/gdb~ once you are sure that /usr/bin/gdb works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some standard utilities (basename, chmod, ln, mkdir, mktemp, rm, sleep, and tail). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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