kill specific process

fj8283888 · 05-30-2007, 08:40 PM

Hi,

I put the script into .bash_profile which runs a process when uses login to that account, the problem is when login again, the process will run again and cause the crash, how could I put the condition to check whether the process has been run, if it is run, no need to call it.

that what I found in process

root 14062 14061 0 09:23 ? 00:00:00 ./testsrv lt.cf3

thx heaps

SlackDaemon · 05-30-2007, 11:01 PM

You would use an 'if'statement to check the $? variable. If the last command was successful you will receive a value of 0. If you want specifics on what to do, you'll have to provide more information.

fj8283888 · 05-30-2007, 11:42 PM

First, thx for your reply.

in the .bash_profile
I delcare as:

Code:

./testsrv test.cf 2>e2.log

could you I put the if condition there to check whether this process has been called or not

Thx heaps

SlackDaemon · 05-31-2007, 12:45 AM

Use pgrep and the name of the process you are checking. Then test $? to see if the value is 0.

example:

pgrep processName
if [ $? == 0 ]; then
# code to execute when process is already running
else
#code to execute when process is not running
fi

fj8283888 · 05-31-2007, 04:14 AM

thx heaps, I get it

fj8283888 · 05-31-2007, 04:54 AM

I wrote the script as

Code:

if [ $a =="0"];then
echo "a"
else
echo "b"
fi

what's the error of it?
line 21: syntax error near unexpected token `else'
-bash: /usr/mrv2/.bash_profile: line 21: `else'

SlackDaemon · 05-31-2007, 06:28 AM

Quote:

Originally Posted by fj8283888

I wrote the script as

Code:

if [ $a =="0"];then
echo "a"
else
echo "b"
fi

what's the error of it?
line 21: syntax error near unexpected token `else'
-bash: /usr/mrv2/.bash_profile: line 21: `else'

That worked on my system but after I put a space between "0" and ]
also place a space between ]; and then