using shell script - Linux / Unix / BSD Forum

prn

Expert

200 Posts

April 4th, 2008
11:05 AM
#2

Re: using shell script

Quote:

Originally Posted by madhu3437

using shell script
i want know the all process are running or not in a particular path.
the result will shown in web page (html).

process name = running ( server is running)
process name1 = not running( here server is not running)
process name 2 = running ( server is running)

The usual way of determining if a particular process is running is to us ps piped to grep for the process. For example, if you want to determine whether Apache is running, you can do something like:

Code: ( text )

ps | grep httpd

and get back some number of lines showing all the processes with httpd in them.

Perhaps unfortunately, one process line you are likely to get back will be "grep httpd". :)

So you may want to filter that out with something like

Code: ( text )

ps -ef | grep -v grep | grep httpd

And this will return only the lines showing actual instances of Apache. Now you are in a position to adapt this to your shell script (presumably being run by the web server---see below) where you just want to return a line saying that apache is or is not running. (You may notice something odd about the particular example I have chosen. :) )

Here, you don't really care about the exact content of the lines, in fact you probably don't want to actually display them. You just want a "count" of the number of lines returned so you know whether there were some or none:

Code: ( text )

if [ `ps -ef | grep -v grep | grep -c httpd` -gt 0 ] ; then
echo "<P>apache is running</P>"
exit
else
echo "<P>apache is not running</P>"
exit
fi

Now comes the warning: You need root privileges to look at processes being run by other users and your web server should NOT be running with root privileges. It will usually run either as "www" or as "nobody". So you need to grant LIMITED privs to the user that runs the web server. (I'll assume "www" for this example.) By far the best way to do this is to use sudo. Here is another thread with some discussion of how to go about that.

In this case, (let's assume desdemona is the name of your server) the easiest thing might be to put the actual script (let's call it foo.cgi) for this specific function directly into cgi-bin (which may be /usr/local/apache/share/cgi-bin, for example) and set the privs for it as:

Code: ( text )

chmod 0744 foo.cgi

so that only root can execute it and then include the lines:

Code: ( text )

# User privilege specification
root ALL=(ALL) ALL
www desdemona=NOPASSWD:/usr/local/apache/share/cgi-bin/foo.cgi

in your /etc/sudoers file.

I know that this is probably more information and less "how-to" than you may have been hoping for, but in fact, it's not quite as simple as dropping in a pre-made script.

HTH,
Paul

madhu3437

Newbie

12 Posts

April 5th, 2008
02:17 PM
#3

Re: using shell script

Thaks very much Paul
one more thing. Below shell script i create all servers are running or not
but i wrote like
i create a file, name of the file is =input_file(in that file put the all servers name)
and run the scripts
getting out put like

SERVER NAME

NETXfnic_uas02_31008 = 1
NETXacs2_uas02_31011 = 0 (this name AMERICAN CENTURY2)
NETXnetxpress_uas02_31013 = 1 (this name NETXPRESS)
NETXjohnston_uas02_31035 = 1
NETXemerald_uas02_31039 = 1
NETXjapan_uas02_31044 = 1
NETXncbank_uas02_31073 = 1
NETXcunamutual_uas02_31069 = 1
NETXhibernia_uas02_31081 = 1

but i want OUTPUT like

AMERICAN CENTURY2 NOT RUNNING
NETXPRESS RUNNING

(NETXacs2_uas02_31011) this is the server name but output like AMERICAN CENTURY2 i want show in the web page

so many servers we have ,so we show the in the web page like
server name = running
server name1 = not running

AMERICAN CENTURY2 NOT RUNNING
NETXPRESS RUNNING

var=`cat input_file`

if [ -f ./out.htm ]
then
rm ./out.htm
fi

for list_of_proc in $var
do
echo $list_of_proc
ps -eaf | grep $list_of_proc >> ./out.htm >&1
done

for list_of_proc in $var
do
flag=`grep "NETXcppServer -name $list_of_proc" out.htm|wc -l`

startTag="<html><head></head><body><h1>"
endTag="</h1></body></html>"
echo "$startTag" "$list_of_proc" "=" "$flag" "$endTag" >> /u/mkulluru/dev/html/abc.htm
done

please reply me it help and carrier will good for me also

Regards,
Madhu

Quote:

Originally Posted by prn

The usual way of determining if a particular process is running is to us ps piped to grep for the process. For example, if you want to determine whether Apache is running, you can do something like:

Code: ( text )

ps | grep httpd

Code: ( text )

ps -ef | grep -v grep | grep httpd

Code: ( text )

if [ `ps -ef | grep -v grep | grep -c httpd` -gt 0 ] ; then
echo "<P>apache is running</P>"
exit
else
echo "<P>apache is not running</P>"
exit
fi

Code: ( text )

chmod 0744 foo.cgi

so that only root can execute it and then include the lines:

Code: ( text )

# User privilege specification
root ALL=(ALL) ALL
www desdemona=NOPASSWD:/usr/local/apache/share/cgi-bin/foo.cgi

prn

Expert

200 Posts

April 7th, 2008
05:41 PM
#5

Re: using shell script

Quote:

Originally Posted by ghostdog74

don't have to use that many greps, when awk does the job :)

Code: ( text )

ps -ef| awk '/httpd/'

Eh?

Code: ( text )

[root@deimos ~]# ps -ef | grep 'bash'
prn 2915 2912 0 2007 pts/1 00:00:00 bash
root 2949 2944 0 2007 pts/1 00:00:00 -bash
prn 22993 22984 0 Mar07 pts/2 00:00:00 bash
prn 26492 26491 0 12:54 pts/3 00:00:00 -bash
root 26526 26525 0 12:54 pts/3 00:00:00 -bash
root 26581 26526 0 12:57 pts/3 00:00:00 grep bash
[root@deimos ~]# ps -ef | grep -v grep | grep -c bash
5
[root@deimos ~]# ps -ef | awk 'bash'
[root@deimos ~]#

If, in those circumstances, I grep just for "bash", I get back 5 instances plus the grep itself. If I use -v to exclude the "grep" line, I get back the proper count. If I use the awk expression you gave, I am getting back nothing.

I could always use something like:

Code: ( text )

[root@deimos ~]# ps -ef | awk /bash/
prn 2915 2912 0 2007 pts/1 00:00:00 bash
root 2949 2944 0 2007 pts/1 00:00:00 -bash
prn 22993 22984 0 Mar07 pts/2 00:00:00 bash
prn 26492 26491 0 12:54 pts/3 00:00:00 -bash
root 26526 26525 0 12:54 pts/3 00:00:00 -bash
root 26614 26526 0 13:06 pts/3 00:00:00 awk /bash/

but that is simply equivalent to the case of "ps -ef | grep bash" so I'm not clear on what you mean there.

Paul

madhu3437

Newbie

12 Posts

May 13th, 2008
11:52 AM
#9

Re: using shell script

Quote:

Originally Posted by prn

Ah! I see now. Yes, that is a bit more elegant. :)

Paul

we have 40 sites each site haveing webserver setup and application servers.
and also we need to find out the each site webserver and application servers is running or not in a particular machine.

if 40 sites are running or not running show in the html page.

These input_file have the 40 sites name

var=`cat input_file`

if [ -f ./out.htm ]
then
rm ./out.htm
fi

for list_of_proc in $var
do
echo $list_of_proc
ps -eaf | grep $list_of_proc >> ./out.htm >&1
done
for list_of_proc in $var
do
flag=`grep "NETXcppServer -name $list_of_proc" out.htm|wc -l`
startTag="<html><head></head><body><h1>"
endTag="</h1></body></html>"
echo "$startTag" "$list_of_proc" "=" "$flag" "$endTag" >> /u/mkulluru/dev/html/abc.htm
done

i am getting out

Republic = 1
TRP = 0
(here 1 mean is running)
(here 0 mean is not running)

but i want put like

Republic = running
TRP = Not running

how can write the in the script , please on this it is very use full to me.

Thanks & Regards
Madhusudhana gupta kulluru

madhu3437

Newbie

12 Posts

May 16th, 2008
09:01 AM
#10

Re: using shell script

i giving full details,

we have machines a,b,c,d
in each machine application servers are running
but each machine have 40 application server are running
result of 40 application servers are running or not shown in the web page.

but i am in z machine
when run the script (http://172.30.98.91:/cgi/health.ksh) in web page
Result will show in the web page .

Resultant in web page

Server a machine b machine c machine d machine
--------------------------------------------------------------------------------------------
trowe running running running running
republic running not running running running
universal not running
. ,
.
. ,
.
.
acs running running running running

it very help full greate becaues i am trouble .please help

Thanks & Regards,
Madhusudhana gutpa kulluru

Quote:

Originally Posted by madhu3437