10-12-2005
Thank you
Sometimes the answer stares you right in the face and you just can't see it.
I was under the impression that the only valid exit status returned would be the one from the longest running background process.
Thanks again.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
How do you capture the return code from a background process?
I am dumping data to a fifo and then processing it in a c program.
I need to know that the sql finished successfully to ensure no missing data. Thanks.
ex.
sqlplus user/password < get_data.sql > data_fifo.txt &
bin/process_data... (2 Replies)
Discussion started by: korndog
2 Replies
2. Shell Programming and Scripting
I have a sript which is going to trigger other 3 scripts in background simultaneously
for eg:
Main Script:(main.sh)
-----------
sh a.sh &
sh b.sh &
sh c.sh &
How to catch the exit status and store it in a variable for all those three scripts in main script. Is there any other way of... (4 Replies)
Discussion started by: Omkumar
4 Replies
3. Shell Programming and Scripting
i need to execute 5 jobs at a time in background and need to get the exit status of all the jobs i wrote small script below , i'm not sure this is right way to do it.any ideas please help.
$cat run_job.ksh
#!/usr/bin/ksh
####################################
typeset -u SCHEMA_NAME=$1
... (1 Reply)
Discussion started by: GrepMe
1 Replies
4. Linux
Hi!
First of all, let me warn you I'm quite new to the world of LINUX and Operating Systems understanding, so that's why I pose these newbie and stupid qustions...
Anyway, I'm trying to build my own simple shell in C and I'm getting some problems in implementing the background process ('&')... (10 Replies)
Discussion started by: neimaD
10 Replies
5. SuSE
I have installed oracle 10g on suse sles9. I do not see oracle background processes.
ps -ef|grep ora_ gives me environment variables junk.
ps -ef|grep smon does not show anything however database is up and running.
Any idea how to tweak that? (1 Reply)
Discussion started by: vijayasawant
1 Replies
6. Shell Programming and Scripting
Ok guys so I have my first dummy shell almost done except for one tiny part: I do not know how to run a process in the background, from the code!
I already know how to do that in a normal shell:
$ program &
However, no clue when it comes to how to program that thing. :eek:
A very... (2 Replies)
Discussion started by: Across
2 Replies
7. Shell Programming and Scripting
Hi All,
I have a scenario where I am executing some child shell scripts in background (using &)through a master parent script.
Is there a way I can capture the exit status of each individual child script after the execution is completed. (2 Replies)
Discussion started by: paragkalra
2 Replies
8. Shell Programming and Scripting
Hello Friends,
Hope you are doing well.
I just need a help in executing multiple processes.
I've written a shell script which calls another scritps. But the problem is there are too many processes to run, and each process takes about a min to finish its execution.
So, I want to just... (3 Replies)
Discussion started by: singh.chandan18
3 Replies
9. UNIX for Dummies Questions & Answers
Hi, I can't understand why the last $? is 1? can somebody plz help me to understand it? thanks
$ ksh
$ ps -f
UID PID PPID C STIME TTY TIME COMMAND
msarabad 12361 12319 0 15:17:58 pts/1 0:00 ksh
msarabad 12319 12317 0 15:15:11 pts/1 0:00 -sh
msarabad 12362 12361 ... (7 Replies)
Discussion started by: messi777
7 Replies
10. Shell Programming and Scripting
Hi,
I have a schell script parent.ksh from which I am calling three background processes a.ksh,b.ksh and c.ksh. Once these three processes completes the next step in parent.ksh should execute. How to achieve this?
Please help me....
Thanks... (1 Reply)
Discussion started by: ravinunna
1 Replies
LEARN ABOUT DEBIAN
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)