RE: basic bash help
- From: "Fowler, Kenneth R" <Kenneth.R.Fowler@xxxxxxxxxx>
- To: <Chris.Stephens@xxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 27 May 2011 15:32:02 -0400
I tend to use the following code fragment in many of my scripts...
$ cat test.sh
#!/bin/sh
case $0 in
/*)
FILE_NAME=$0
;;
*)
FILE_NAME=`printf "%s/%s\n" $PWD $0 | sed -e s'!/\./!/!'g`
;;
esac
#
echo $FILE_NAME
It will give desired results no matter how it is called, full pathname
or relative etc...
$ pwd
/orabackup/ocdba/Ken/stuff
$ test.sh
/orabackup/ocdba/Ken/stuff/test.sh
$ ./test.sh
/orabackup/ocdba/Ken/stuff/test.sh
$ /orabackup/ocdba/Ken/stuff/test.sh
/orabackup/ocdba/Ken/stuff/test.sh
$ cd ..
$ stuff/test.sh
/orabackup/ocdba/Ken/stuff/test.sh
$ ./stuff/test.sh
/orabackup/ocdba/Ken/stuff/test.sh
$ /orabackup/ocdba/Ken/stuff/test.sh
/orabackup/ocdba/Ken/stuff/test.sh
Regards,
Ken.
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Stephens, Chris
Sent: Friday, May 27, 2011 2:42 PM
To: 'oracle-l@xxxxxxxxxxxxx' (oracle-l@xxxxxxxxxxxxx)
Subject: basic bash help
I'm writing a script to allow the sysadmin's to kill any active sessions
for a particular database user.
If the script is called as root, I re-invoke it as oracle. However,
'dirname' doesn't seem to be working as expect and I have no idea why or
how to get around it. A little bit of googl'ing didn't help either so I
turn to old faithful. J
#!/bin/sh
export ORAENV_ASK=NO
export ORACLE_SID=xxxxxxx
export SCRIPT=`basename $0`
export SCRIPT_DIR=`dirname $0`
echo "${SCRIPT_DIR} is the script dir."
# Re-invoke this script as oracle if invoked as root
CUSER=`id |cut -d"(" -f2 | cut -d ")" -f1`
if [ "$CUSER" = "root" ]
then
su - oracle -c "${SCRIPT_DIR}/${SCRIPT}"
exit $?
fi
<rest of script>
The script output is:
". is the script dir."
The script is located in /home/oracle/scripts/sql/topsecret
Anybody know what the deal is?
I'm guessing it has something to do with sub-shells or something but I
don't know how to work around it. I guess I can always hardcode the
path but I would prefer not to.
Thanks for any help!
chris
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