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Shell script "threads"

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Don Bentz
Regular Advisor

Shell script "threads"

We run scripts that execute Oracle SQLs, most of them with multiple "steps". It seems there are cases where a 'ps -ef' will show the "shell script" and sometimes not, even though one of it's "steps" (SQL Scripts) are executing. Suffice it to say I find it a little difficult to follow the thread when a programmer asks me to kill the "shell script" but they don't know what "step" it's in.
Insecurity is our friend. It keeps you dependent.
9 REPLIES
Fred Ruffet
Honored Contributor

Re: Shell script "threads"

is the SQL script is a subprocess from shell script, then shell script can't "disappear" while SQL still running.

In order not to miss the shell, you can use this command : "UNIX95=true ps -AH -o user,pid,args" which will show you processes in a tree form. You can use grep to get only processes hold by the user you want.

Regards,

Fred
--

"Reality is just a point of view." (P. K. D.)
Don Bentz
Regular Advisor

Re: Shell script "threads"

Fred-
Well, I suppose I should have been more specific. According to the "man" pages for "ps" the -A and -H options are only valid for XPG4. I am certain that your solution would work swell in such a case. To be honest with you, I don't even know what XPG4 is, but I do know that I get an error when I try to use these options. I am on HPUX 11.00
Insecurity is our friend. It keeps you dependent.
Jean-Luc Oudart
Honored Contributor

Re: Shell script "threads"

I have HPUX 11.0 and I have no problem running the command
UNIX95= ps -AH -o user,pid,args | grep

Regards
Jean-Luc
fiat lux
Don Bentz
Regular Advisor

Re: Shell script "threads"

# UNIX95=`ps -AH -o user,pid,args | grep sched`
ps: illegal option -- A
ps: illegal option -- H
ps: illegal option -- o
usage: ps [-edaflPx] [-u ulist] [-g glist] [-p plist] [-t tlist] [-R prmgroup]

Perhaps mistakenly I removed the spaces and replaced them with "back tics",
But thanks anyway.
Insecurity is our friend. It keeps you dependent.
Jean-Luc Oudart
Honored Contributor

Re: Shell script "threads"

no backquote !!!
just a space between UNIX95= and ps command

Regards
Jean-Luc
fiat lux
Don Bentz
Regular Advisor

Re: Shell script "threads"

So, what is "UNIX95". I can't find a man page for it and "which" returns nothing. That construct looked like an "assign" to me(?).
Insecurity is our friend. It keeps you dependent.
Jean-Luc Oudart
Honored Contributor
Solution

Re: Shell script "threads"

Fred Ruffet
Honored Contributor

Re: Shell script "threads"

I made it a little short maybe :)

Switching in XPG4 mode can be done by setting UNIX95 env variable to anything you want (for exemple to "true").

In Unix, you can do the following :
. Have a var defined for your shell, using "UNIX95=true"on a single line.
. Have a var defined for your shell and sub-shells, using "export UNIX95=true" on a single line
. Have a var defined only for the current command, using "UNIX95=true whatevercommandyouwant".

I used the last one. So you have to do exactly the following :
UNIX95=true ps -AH -o user,pid,args
(note the space between "UNIX95=true" and "ps".)

I only set UNIX95 for this command, because this XPG4 environment has consequences for many commands and I don't want your environment to be changed.

Regards,

Fred
--

"Reality is just a point of view." (P. K. D.)
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Don Bentz
Regular Advisor

Re: Shell script "threads"

Fred - thanks for the reply.
Insecurity is our friend. It keeps you dependent.