i have compiled a script as below. Basically this script is intended to call 3 other scripts, which i intend to run simultaneously.
in order to be sure that one instance of the master script runs, i introduced a lock file and then delete it once it is finished, i.e after the 3 scripts are done.
Before removing the lock file I am using the
command in order to see if the process of the 3 scripts still exist, hence still running.
Depending on the result of the kill command i then used
then followed by removal of the lock file.
Is this theory correct or maybe you can suggest another way?
(Note: of course the 3 scripts can run in cron without using a master script, but i am restricted in using a master script, so the idea is to keep it that way)
Oracle and Scripting gurus,
I need some help with this script...
I am trying to add the query
SELECT * FROM
ALL_SYNONYMS
WHERE SYNONYM_NAME = 'METADATA'
in the current script....
Read the result set and look for the TABLE_NAME field. If the field is pointing to one table eg.... (18 Replies)
I have a script that calls several other scripts in a specified order:
# Loop over actions in specified order (STOP_ORDER or START_ORDER) and build and evaluate commands
for command in $(eval print '$'${action}_ORDER)
do
printf "`date`\tExecuting ${action}_${command} = `eval print... (1 Reply)
I have created a script to call 2-3 shell scripts to be execute in succession, however, it seems that after the first shell script completes, the entire script exits out.
Example:
1stJob.sh
2ndJob.sh
1st Job - FTP files from Mainframe to Unix using the following commands at the tail of... (1 Reply)
Hi,
I have written a some six scripts to move large files and re-size them. This has been done step by step, taking backup, creating the new files, merging the files, removing the temporary files created.
Since these files are around 500 MB, each step takes somewhere between 1 to 5 mins.
... (1 Reply)
Hello gurus,
I have three korn shell script 3.1, 3.2, 3.3. I would like to call three shell script in one shell script.
i m looking for something like this
call 3.1;
If 3.1 = "complete" then
call 3.2;
if 3.2 = ''COMPlete" then
call 3.3;
else
exit
The... (1 Reply)
I need to call 3 different shell scripts from 2 different scripts, one is a perl script and other is Shell script.
In Case -1 :
The perl script is myperlscript.pl
and the name of three shell scripts which need to be called from the perl script are a1.sh, a2.sh and a3.sh. Each shell script... (1 Reply)
Hi All,
Just give me an idea on how to do the below logic.
1. I have one master script masterload.sh, the usage of this script is
a. masterload.sh FULL BFLF_LOAD.txt
b. masterload.sh DELTA TDLD_LOAD.txt
c.masterload.sh USER MAS_LOAD.txt
FULL , DELTA ,USER are the varaibles based... (1 Reply)
I've been bitten by using a lock or pid file to prevent multiple instances of a script. A user typed kill -9, and the pid file didn't go away. You can't trap -9. So when he tried to restart, it said "already running", and I got trouble report. Argh.
So here's what we came up with:
# Stop if... (1 Reply)
Dear all,
I am working on script which call other shell scripts in a loop but problem is from second script am not able to come out.
Here is the snippet:-
#!/bin/bash
HSFILE=/root/Test/Components.txt
LOGFile=/opt/domain/AdminDomain/application/logs... (3 Replies)
Hi all,
I have developed a shell script where I am executing datastage jobs.This script will be further placed in enterprise scheduler to trigger it at particulat time.
I have around 300 jobs , I am passing jobnames to script as a paramere. So is it possible I can trigger all jobs from one... (3 Replies)
Discussion started by: prasson_ibm
3 Replies
LEARN ABOUT BSD
shlock
SHLOCK(1) General Commands Manual SHLOCK(1)NAME
shlock - create lock files for use in shell scripts
SYNOPSIS
shlock -p pid -f name [ -b ] [ -u ] [ -c ]
DESCRIPTION
Shlock tries to create a lock file named name and write the process ID pid into it. If the file already exists, shlock will read the
process ID from the file and test to see if the process is currently running. If the process exists, then the file will not be created.
Shlock exits with a zero status if it was able to create the lock file, or non-zero if the file refers to currently-active process.
OPTIONS-b Process IDs are normally read and written in ASCII. If the ``-b'' flag is used, then they will be written as a binary int. For
compatibility with other systems, the ``-u'' flag is accepted as a synonym for ``-b'' since binary locks are used by many UUCP pack-
ages.
-c If the ``-c'' flag is used, then shlock will not create a lock file, but will instead use the file to see if the lock is held by
another program. If the lock is valid, the program will exit with a non-zero status; if the lock is not valid (i.e., invoking
shlock without the flag would have succeeded), then the program will exit with a zero status.
EXAMPLES
The following example shows how shlock would be used within a shell script:
LOCK=/var/run/innd/LOCK.send
trap 'rm -f ${LOCK} ; exit 1' 1 2 3 15
if shlock -p $$ -f ${LOCK} ; then
# Do appropriate work
else
echo Locked by `cat ${LOCK}`
fi
HISTORY
Written by Rich $alz <rsalz@uunet.uu.net> after a description of HDB UUCP locking given by Peter Honeyman. This is revision 1.9, dated
1996/10/29.
SHLOCK(1)