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Top Forums UNIX for Advanced & Expert Users How can i get the parent process only? Post 302213195 by nirav_soni on Wednesday 9th of July 2008 12:24:27 PM
Old 07-09-2008
Bug How can i get the parent process only?

Hello,

I'm running one script every night and that's kick off through cron jobs.

Inside the script i'm checking whether my script is already running or not.

I'm using following command to check whether is running or not.

ps -eaf | grep "test_PID.ksh" | grep -v "grep test_PID.ksh" | wc -l

sometime it gives me 2 process or 3 process

Output:
user 15243 15203 0 12:00:01 ? 0:00 /usr/bin/ksh /usr/local/my/bin/test_PID.ksh

user 15203 254 0 12:00:01 ? 0:00 sh -c /usr/local/my/bin/test_PID.ksh

Why am i seeing two process for one job.

How can i get only parent process not child process.

Thank you for your helps in adv.
 

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ptree(1)																  ptree(1)

NAME
ptree - print process trees SYNOPSIS
/usr/bin/ptree [-a] [-c] [-z zone] [pid | user] ... ptree prints the process trees containing the specified pids or users, with child processes indented from their respective parent pro- cesses. An argument of all digits is taken to be a process-id, otherwise it is assumed to be a user login name. The default is all pro- cesses. The following options are supported: -a All. Print all processes, including children of process 0. -c Contracts. Print process contract memberships in addition to parent-child relationships. See process(4). This option implies the -a option. -z zone Zones. Print only processes in the specified zone. Each zone ID can be specified as either a zone name or a numerical zone ID. This option is only useful when executed in the global zone. The following operands are supported: pid Process-id or a list of process-ids. ptree also accepts /proc/nnn as a process-id, so the shell expansion /proc/* can be used to specify all processes in the system. user Username or list of usernames. Processes whose effective user IDs match those given are displayed. Example 1: Using ptree The following example prints the process tree (including children of process 0) for processes which match the command name ssh: $ ptree -a `pgrep ssh` 1 /sbin/init 100909 /usr/lib/ssh/sshd 569150 /usr/lib/ssh/sshd 569157 /usr/lib/ssh/sshd 569159 -ksh 569171 bash 569173 /bin/ksh 569193 bash The following exit values are returned: 0 Successful operation. non-zero An error has occurred. /proc/* process files See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWesu | +-----------------------------+-----------------------------+ |Interface Stability |See below. | +-----------------------------+-----------------------------+ The human readable output is Unstable. The options are Evolving. gcore(1), ldd(1), pargs(1), pgrep(1), pkill(1), plimit(1), pmap(1), preap(1), proc(1), ps(1), ppgsz(1), pwd(1), rlogin(1), time(1), truss(1), wait(1), fcntl(2), fstat(2), setuid(2), dlopen(3C), signal.h(3HEAD), core(4), proc(4), process(4), attributes(5), zones(5) 11 Oct 2005 ptree(1)
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