|
|
Sponsored Content
Operating Systems
Solaris
keeping a process alive ?
Post 302474538 by Praveen_218 on Wednesday 24th of November 2010 01:23:16 PM
11-24-2010
Try this ....
In order to know, if a process is running or gone, I can suggest you two methods:
1) Use pidof <name of your program> and check its return value which should be any number as the pid of your process but should not be zero. So if you get zero as return value, means the process is gone.
2) You may use ls /proc/<pid_of_your_process> should be sucessful. Meaning check the value of $? immediately and the decide, if your process is running or gone.
Now write a parent script which loops for ever (like while (1) ...) and checks the process state everytime, if your process is found to be not running then invoke the process again and sleep for a reasonable time to allow the process up and running before your this parent script loops to check the status of your process for the next time.
Also invoke your process, from this parent script, using nohup <your_process_name> &, as you would be knowing to allow your process run in the background and asynchronously to this script.
Cheers!!!!!!!!!!!!
1) Use pidof <name of your program> and check its return value which should be any number as the pid of your process but should not be zero. So if you get zero as return value, means the process is gone.
2) You may use ls /proc/<pid_of_your_process> should be sucessful. Meaning check the value of $? immediately and the decide, if your process is running or gone.
Now write a parent script which loops for ever (like while (1) ...) and checks the process state everytime, if your process is found to be not running then invoke the process again and sleep for a reasonable time to allow the process up and running before your this parent script loops to check the status of your process for the next time.
Also invoke your process, from this parent script, using nohup <your_process_name> &, as you would be knowing to allow your process run in the background and asynchronously to this script.
Cheers!!!!!!!!!!!!
|
|
8 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
:confused:
I have a process which was schedule to run from 8am - 6pm daily. The scripts will search & run the commands that i was predefined in the database. Ususally, there were about 6-7 jobs for each submission and each job takes about 1-2 hrs and running one by one. And, I have a cron job... (3 Replies)
Discussion started by: hk_newbie
3 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I'm very new to Unix so please bear with me... :)
Here is my requirement:
I need to create a cron job to run two different scripts at 1 a.m. every day.
Here's what I did:
I used the "crontab -e" command and created a crontab file using the vi editor.
When I exit the editor using... (3 Replies)
Discussion started by: yogiB
3 Replies
3. UNIX for Dummies Questions & Answers
Hi Everybody
I have small requirement that needs to be implemented in shell script.
Currently i have shell script which invokes a java process say "Process A" which runs in background.
If some one tries to invoke again the same shell script , then there should be some mechanism inside the... (23 Replies)
Discussion started by: appleforme1415
23 Replies
4. Shell Programming and Scripting
Hi guys,
I neet to run sqlldr to charge about 50,000 files every day to my DWH, so I need to make an script to keep about 100 processes of sqlldr running at the same time.
So, the issue is that i've been trying for a few days to make an script which can keep that amount of processes running, so... (2 Replies)
Discussion started by: razziel
2 Replies
5. Shell Programming and Scripting
Bonjour,
I have a large script with a lot of print statements and misc commands. Standard and error outputs are redirected like into the following code :
#!/usr/bin/ksh
LOG=/<some dir>/log
> $LOG
exec >>${LOG} 2>>${LOG}
print aaaaa
print bbbbb
print ccccc
...
some_cmd
That way,... (5 Replies)
Discussion started by: Fundix
5 Replies
6. Tips and Tutorials
For the newbies, I should have posted this years ago....
Here is the standard (tiny) "bread and butter" perl script (on Linux) I use in my crontab files to insure key processes are alive ( just in case ! ) like httpd, named, sshd, etc.
The example below if for named......
... (1 Reply)
Discussion started by: Neo
1 Replies
7. What is on Your Mind?
Odd thing.
I posted in the Solaris forum, new user, just asking for a bit of advice. Nothing too complicated. As of this post there have been 140 views and zero replies. So that got me thinking, is this normal? I had a look around, and I see the same thing on many other threads, and in other... (2 Replies)
Discussion started by: _JonB_
2 Replies
8. Programming
Hi
I'm adding http 1.1 GET to my project and trying to use “Keep-Alive” HTTP connections to the host, The problem is when I recv() the first page, it succeeds. However, the 2nd consecutive recv() will receive zero bytes, for which I really have no idea. As per HTTP 1.1 I have Connection: ... (6 Replies)
Discussion started by: Projecteer
6 Replies
LEARN ABOUT HPUX
cdsclerk
cdsclerk(1m) cdsclerk(1m) NAME
cdsclerk - Manages the interface between clients and the CDS server SYNOPSIS
cdsclerk [-D] [-w route] OPTIONS
For debugging use only. Causes the cdsadv clerk process not to fork. Routes serviceability messages. DESCRIPTION
The cdsclerk command manages the interface between clients and the CDS server. Privilege Required You must log in as superuser (root). NOTES
This command is used by the advertiser on the system where the CDS clerk is running. You should use this command interactively only to do diagnostic work on the host system. EXAMPLE
Before you run the following process, make sure that other clerks are not running. To start the cdsclerk process, follow these steps: Make sure that a CDS server is already running somewhere within the cell. Log in to the system as superuser (root). Log in to DCE as the machine principal of the local host. Enter the principal name in the format /hosts/hostname/self as shown in the following example command for a host named orion whose password is smith: # dce_login hosts/orion/self smith Enter the following command to see if the dced process is already running: # ps If the dced process appears on the list of active processes, proceed to step 5. If the dced process does not appear on the list of active processes, enter the following command to start the process: # dced Enter the following command to start the cdsadv process: # cdsadv Enter the following command with the appropriate arguments to start the cdsclerk process: # cdsclerk RELATED INFORMATION
Books: OSF DCE Administration Guide cdsclerk(1m)