unix and linux operating commands

keepitsimpleeng · #1 06-06-2011

run_xfs_fsr is a xfs filesystem maintenance script designed to run under cron. The system is a home theater personal computer running mythbuntu 10.10, and is accessed remotely for these tests. cron runs a script, (xfs_fsr.sh) at 02:30 that runs the subject script under BASH and sets the parameters, 1. logfile, 2. "left-off" file, 3. runtime (10800 seconds). 4. is not set so run_xfs_fsr uses the default, /etc/mtab.

When run under cron, the xfs reorganization program (xfs_fsr) stdout goes to syslog instead of the logfile. When run as a login script, it goes to the logfile.

In the same run_xfs_fsr script, another xfs utility, xfs_db, stdout goes to the logfile in both cases.

I am at a loss to understand or see any error here. Even though I have years of programming experience, I am a newbie to BASH shell scripting……? Pardon the long post.

The section of run_xfs_fsr outputting xfs_fsr:

Code:

exec > $log_file
echo "⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯SHELL=""$SHELL"
echo "⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯PWD=""$PWD"
echo "⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯USER=""$USER"
echo "⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯SCRIPT=""$script"
echo "⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯log_file=""$log_file"
<snip> 
#start reports & reorgs
echo "⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯xfs report"
df -h -l -T --total -t xfs 2>&1   #status of local xfs file systems
frag_report $used_mtab
if [ $xfs_found == "yes" ]
then
  test $left_off_exists = "no" && echo "New $left_off will be created."
  logger -t "RUN_XFS_FSR" "xfs_fsr -v -t ""$time_for_run"" -f ""$left_off"" -m ""$used_mtab"" 2>&1 LOG:""$log_file"
  echo "⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯reorganization"
  echo -e "⋯⋯""$(date)""⋯⋯start⋯⋯xfs_fsr"
  xfs_fsr -v -t $time_for_run -f $left_off -m $used_mtab 2>&1   
  xfs_fsr_exit_status="$?" 
  echo -e "⋯⋯Exit status for xfs_fsr= ""$xfs_fsr_exit_status""\n⋯⋯""$(date)""⋯⋯-end-⋯-xfs_fsr"
  frag_report $used_mtab
else
  echo -e "⋯⋯\n⋯⋯No xfs file system mounted\n⋯⋯"
  logger -t "RUN_XFS_FSR" "No xfs file system mounted."      
fi
echo "⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯end"
logger -t "RUN_XFS_FSR" " End: ""$(date)"
exit 0

jim mcnamara · #2 06-06-2011

It is almost always the result of environment variables not being declared correctly.

change the script itself to run ALL login scripts:
/etc/profile
$HOME/.profile
$HOME/.bashrc

and any other 'setup' scripts there are.

keepitsimpleeng · #3 06-06-2011

Quote:

Originally Posted by jim mcnamara

It is almost always the result of environment variables not being declared correctly.

change the script itself to run ALL login scripts:
/etc/profile
$HOME/.profile
$HOME/.bashrc

and any other 'setup' scripts there are.

Thanks for the suggestion, Jim

I was surprised to find that /etc/profile, $HOME/.profile, and $HOME/.bashrc are not executable.

So I ran run_xfs_fsr from cron printing environment variables.

From cron:

Code:

SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
PWD=/root/mycron
LANG=en_US.UTF-8
SHLVL=1
HOME=/root
LOGNAME=root
_=/usr/bin/env

keepitsimpleeng · #4 06-09-2011

Still having problems. The last attempt at making it work was:

Code:

xfs_fsr -v -t $time_for_run -f $left_off -m $used_mtab >$log_file 2>&1

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unix and linux operating commands

Different redirection behavior in BASH/Linux when run under cron vice login ???

UNIX for Advanced & Expert Users

The Following User Says Thank You to jim mcnamara For This Useful Post:
keepitsimpleeng (06-06-2011)