Different redirection behavior in BASH/Linux when run under cron vice login ??? Post: 302528172

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Top Forums UNIX for Advanced & Expert Users Different redirection behavior in BASH/Linux when run under cron vice login ??? Post 302528172 by keepitsimpleeng on Monday 6th of June 2011 02:56:38 PM

06-06-2011

Registered User

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

From login:

Code:

SHELL=/bin/bash
TERM=xterm
USER=root
LS_COLORS=<snip>
SUDO_USER=ljohnson
SUDO_UID=1000
USERNAME=root
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
MAIL=/var/mail/user
PWD=/root/mycron
LANG=en_US.UTF-8
SPEECHD_PORT=6560
SUDO_COMMAND=/bin/bash
HOME=/root
SHLVL=2
LOGNAME=root
LESSOPEN=| /usr/bin/lesspipe %s
SUDO_GID=1000
LESSCLOSE=/usr/bin/lesspipe %s %s
_=/usr/bin/env

As a sort of test, I added these environment variable to run_xfs_fsr:

Code:

TERM="xterm"
USER="root"
USERNAME="root"
MAIL="/var/mail/root"

The test failed, as xfs_fsr still output to syslog. Here is the env from this run:

Code:

TERM=xterm
SHELL=/bin/bash
USER=root
USERNAME=root
MAIL=/var/mail/root
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

Then I tried adding the LESSOPEN and LESSCLOSE, with the same unhappy results:

Code:

LESSOPEN=| /usr/bin/lesspipe %s
LESSCLOSE=/usr/bin/lesspipe %s %s

Then I tried changing the xfs_xfs.sh script to:

Code:

#!/bin/sh
# Run under BASH non-interactive shell
IFS="$(printf '\n\t')"  # Remove 'space', so filenames with spaces work well
oldpwd=$PWD
SHELL=/bin/bash
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
USER="root"
USERNAME="root"
cd /root/mycron
bash run_xfs_fsr /var/log/xfs_fsr.log /root/mycron/.fsrlast_xfs 10800
cd $oldpwd
exit $?

hoping to properly initialize the BASH sub-shell. It produce no change in the result.

Still on my mind, however, is the question why the xfs utility xfs_db prints as expected, but the xfs reorganization program xfs_fsr does not???

keepitsimpleeng

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