Use LET command

[jliang]

Hi,

I write a Korn shell script to use LET command to calculate how many processes are running. the syntax is:

LET "activejob='ps -ef|grep 'test.sh'|wc -l '"

but I got syntax error.

Can you help me with this problem?

Many thanks in advance.

Jing

 

[olded]

Jing:

The LET is optional, and you're using the wrong command substitution character. Use the grave mark ` not the quote ':

activejob=`ps -ef|grep -v 'grep test.sh'|grep 'test.sh'|wc -l `

I also included grep -v to ignore that command in the process table.

You can also use the ksh method of command substituition:

activejob=$(ps -ef|grep -v 'grep test.sh'|grep 'test.sh'|wc -l

Regards,


Ed

 

[stefanwagner]

The linux-ps accepts

grep -C test.sh

which avoids the negative-grep for 'grep test.sh'.
Perhaps your ps too?

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[jliang]

Hi, ED,

It works fine. Thanks very much

Jing

 

[PHV]

You may also try this:
activejob=$(ps -fe | grep -c '[t]est.sh')

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244