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Full Discussion: Check if PID exists
Top Forums Shell Programming and Scripting Check if PID exists Post 302778855 by alister on Monday 11th of March 2013 04:23:58 PM
Old 03-11-2013
Quote:
Originally Posted by zozoo
the u can try pls correct me if im wrong

Code:
ps -ef | awk $2 ~/somepid/ '{print $2}' >> tmp

What if the pid is 345 and it doesn't exist but there is a different process running with a pid of 2345? In that case, a false positive.

Why not just use ps -p pid and be done with it?

Regards,
Alister
 

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GCORE(1)						      General Commands Manual							  GCORE(1)

NAME
gcore - get core image of running process SYNOPSIS
gcore [-s][-c core] pid DESCRIPTION
gcore creates a core image of each specified process, suitable for use with adb(1). By default the core image is written to the file <pid>.core. The options are: -c Write the core file to the specified file instead of <pid>.core. -s Stop the process while creating the core image and resume it when done. This makes sure that the core dump will be in a consistent state. The process is resumed even if it was already stopped. Of course, you can obtain the same result by manually stopping the process with kill(1). The core image name was changed from core.<pid> to <pid>.core to prevent matching names like core.h and core.c when using programs such as find(1). FILES
<process-id>.core The core image. BUGS
If gcore encounters an error while creating the core image and the -s option was used the process will remain stopped. Swapped out processes and system processes (the swapper) may not be gcore'd. 4.2 Berkeley Distribution April 15, 1994 GCORE(1)
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