Try printing the output of the ps command at the beginning of your script:
You'll see the current instance of your script.
Than try to invoke the script like this and compare the output:
To elaborate further: you cannot only check the presence of your script in the process list for obvious reasons: your script
is running when you're running the ps .. | grep .. pipeline, so this thest will always return true.
If you count with ps .. | grep -c .. the output will depend on the shell implementation
(some shells thread differently the last command in a pipeline).
So, again, for a more robust solution, I'd suggest the implementation of some
locking mechanism.
On HP-UX, in application, if the process id has been get with the getpid() and sotred in database, then other monitor process want to check it if the process is existed, are there any system function can do it? I do not want to use the shell script, because it should use popen function to excuted... (5 Replies)
Hi Experts,
Is there any command by which i can chk that the cron process is running fine? Say i have scheduled the cron to run at 10 o clock every monday,Do i need to wait for the time it runs and then chk using ps -ef?
Please shed some light.
Thanks
Ashok. (2 Replies)
Hi
I have a scenario where i need to check multiple instances of a running shell script (abc.sh) .
How can I find from inside a running shell script whether any other instance of the same script is running or not? If any other instance of same shell script is running I need to exit from... (4 Replies)
Hi all,
I have the following code:
if ; then echo 'folder not exist'; else echo 'folder exist'; fi
The "testing" folder is not exist in /home/batch , but thhe result is 'folder exist'. It seems that the code cannot detect that the folder "testing" not exist.
ANybody know the... (1 Reply)
Hi,
I want to create a script who will check if the java process is running & if it finds the process is still there it continues to execute & when the process completes it exit from the script.
I have written a code to check & notify the process existence but i am not getting how to write... (4 Replies)
How can i check block process in Linux?
If found any what action is required?
How to check the pid of process?
How to kill the block process?
How to find out bottleneck process? (3 Replies)
Hi,
I need to know who can I create an script in order to check server mirror in AIX. I got this script
!/usr/bin/ksh
#
# Check if a VG is mirrored.
#
# lsattr -El <lvname> -a strictness -a copies
# If copies=2 and scrictness=y, then VG is mirrored
#
# LVs are retrieved via 'lsvg -l... (5 Replies)
Good morning, I have a python 2.3 script that runs stand alone as intended when tested, then it was put into a ksh script. when running the ksh script it runs as intended. The problem is that my script does not run when the ksh script is called by another user who runs a batch process (as of right... (1 Reply)
Hello Everyone,
I have a process that should be always running. Unfortunately, this process is getting down almost every 10 minutes. I want to make a script that verify the state of this process: If the process is up, the script shouldn't do nothing and if it's down he should run it.
Can... (3 Replies)
Hi All,
I am writing script for Env refresh for Oracle DB. I am using Datapump for that. If i start expdp or impdp, how can i know that export or import has completed. I have query for that. How will i integrate with script?. Or any command i can run from Linux side. Please share you... (1 Reply)
Discussion started by: pvmanikandan
1 Replies
LEARN ABOUT LINUX
pid
pid(n) Tcl Built-In Commands pid(n)__________________________________________________________________________________________________________________________________________________NAME
pid - Retrieve process identifiers
SYNOPSIS
pid ?fileId?
_________________________________________________________________DESCRIPTION
If the fileId argument is given then it should normally refer to a process pipeline created with the open command. In this case the pid
command will return a list whose elements are the process identifiers of all the processes in the pipeline, in order. The list will be
empty if fileId refers to an open file that is not a process pipeline. If no fileId argument is given then pid returns the process identi-
fier of the current process. All process identifiers are returned as decimal strings.
EXAMPLE
Print process information about the processes in a pipeline using the SysV ps program before reading the output of that pipeline:
set pipeline [open "| zcat somefile.gz | grep foobar | sort -u"]
# Print process information
exec ps -fp [pid $pipeline] >@stdout
# Print a separator and then the output of the pipeline
puts [string repeat - 70]
puts [read $pipeline]
close $pipeline
SEE ALSO
exec(n), open(n)
KEYWORDS
file, pipeline, process identifier
Tcl 7.0 pid(n)