Command Line works but not script 1

[roycrom]

Hi all,

I'm trying to write a script that outputs an XML file to be put on a 'service status' page. I have nearly everything in place now - I am successfully checking web servers, DNS servers, DB servers, proxy servers but the last thing I am struggling with is FTP.

I have fallen back to using telnet'ing port 21 as FTP does not have a robust return code system.

I am running this command from the command line which works perfectly:

echo ^] | telnet ftp.server 21 | grep MOTD | awk {'print $1'}

If the server responds on that port it will print MOTD and my command picks that up and outputs the number '1'. I have changed the MOTD to MTOD and the grep doesn't pick it up and outputs 0, therefore I have a valid return - either 0 or 1 which lets me know if FTP is up or not on the remote server.

However, if I try to run this from within a bash script:

#!/bin/bash
echo ^] | telnet ftp.server 21 | grep MOTD | awk {'print $1'}

then it always returns 0 as if the grep does not find anything.
Any pointers would be much appreciated.

Thanks

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Somethings come from nothing, nothing seems to come from somethings - SFA - Guerilla

roycrom

 

[feherke]

Hi

First, [tt]awk[/tt] is able to find that "MOTD" string in the input, so no need for [tt]grep[/tt] "

echo ^] | telnet ftp.server 21 | awk '/MOTD/{print $1}'

Second, your quoting style is horrible.

Third, I find [tt]netcat[/tt] much flexible than [tt]telnet[/tt], so I would try :

echo quit | netcat ftp.server 21 | awk '/MOTD/{print $1}'

Fourth, why not use an FTP client, like [tt]ftp[/tt] ?

echo quit | ftp -n -v ftp.server | awk '/MOTD/{print $1}'

Feherke.

http://rootshell.be/~feherke/

 

[roycrom]

Fourth, why not use an FTP client, like ftp ?

echo quit | ftp -n -v ftp.server | awk '/MOTD/{print $1}'

Perfect - thanks a lot for your quick reply.

I had started off with the ftp client but was trying to use return codes which was not going too well - I'm more than happy with the solution you suggested. Does what I need and is simple.



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Somethings come from nothing, nothing seems to come from somethings - SFA - Guerilla

roycrom