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Shell Programming and Scripting

first script. need help and advice.

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Top Forums Shell Programming and Scripting first script. need help and advice.
# 8  
Old 10-06-2006
Thanks. I am currently working on a slightly different version but I am not sure that it will function properly so I would appreciate your help. I will post my code when I'm done.

Greetings
# 9  
Old 10-06-2006
This is the script I have and I think it is fairly simple since I was able to come up with it on my own. It would have been perfect but unfortunately the last part with the showNumberOfFiles shows an error message instead of the number of files. It says that no PID has been specified.
I am confused because I am using the same method for obtaining the data in both functions.
Can anyone tell me how I can fix this?

Code:
#!/bin/bash

showProcesses()
{
	netstat -tuv | awk '{print $4}' > portslist.list
	lsof -i < portslist.list | awk '{print $1}'
}

showNumberOfFiles()
{
	lsof -i < portslist.list | awk '{print $2}' > fileslist.list
	lsof -p < fileslist.list | awk '{print $1}' > numberoffiles.list
	wc -l < numberoffiles.list
}

echo The following are the open ports on your computer:
netstat -tuv | awk '{print $4}'

echo These are the processes on each port:
showProcesses

echo This shows the number of files:
showNumberOfFiles

Last edited by sanchopansa; 10-06-2006 at 09:08 AM..
# 10  
Old 10-06-2006
Could you post the contents of netstat -tuv or fileslist.list
# 11  
Old 10-06-2006
netstat -tuv
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 margarita.bg.nc:38486 jynx.bg.ncSmilieop3 TIME_WAIT
tcp 0 0 margarita.bg.nc:38175 cub.bg.nc:jabber-client ESTABLISHED
tcp 0 0 margarita.bg.nc:38218 tiger.bg.nc:3389 ESTABLISHED
tcp 0 0 margarita.bg.nc:32768 hal.bg.nc:netbios-ssn ESTABLISHED
# 12  
Old 10-06-2006
And the result of this
Code:
lsof -i < portslist.list | awk '{print $2}'

is

PID
56
87
606
608
5583

so I assume this must be the content of fileslist.list
# 13  
Old 10-06-2006
Quote:
It says that no PID has been specified.
as per lsof man page

Quote:
-p s This option selects the listing of files for the processes
whose ID numbers are in the comma-separated set s - e.g.,
‘‘123'' or ‘‘123,456''. (There should be no spaces in the
set.)

Multiple process ID numbers are joined in a single ORed set
before participating in AND option selection.
-p requires "," separated pid list(ie in 1 line). Your file fileslist.list provides them in multiple lines. Either you change all the pids in multiple lines to pid in 1 line separated by comma or use a loop to call lsof -p separately for each pid.

eg

while read pid; do
lsof -p $pid
done < fileslist.list
# 14  
Old 10-06-2006
Thanks you for your help, vish_indian.
I tried your suggestion but it shows an error message because the first line of the column says "PID" and then it doesn't go on the chech the others. Is there a simple way to start from the second line, or to cut the PID even before placing it into the file. This is my code for the function now:

Code:
showNumberOfFiles()
{
	lsof -i < portslist.list | awk '{print $2}' > fileslist.list
	while read pid; do
	lsof -p $pid | awk '{print $1}' > numberofiles.list
	done < fileslist.list
	wc -l < numberoffiles.list
}
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