writing batch files. help

ok so i got this

@echo off
this will ping homer then launch vnc viewer
call homer.bat

cd\

cd program files

cd realvnc

cd vnc4

vncviewer.exe 192.168.1.2

the batch runs beutiful it pings the connection then launches and automaticly connects to the host.
what i want to know is if there is a way to make it only launch vnc if ping is succesful

 

no one huh.

 

Hi!
Maybe you should try the Programming Forum and they will know more about this there.
Programming

http://forums.majorgeeks.com/forumdisplay.php?f=27

It's over MY head.

 

@echo off

ping -n 1 192.168.1.2 > NULL

if errorlevel 1 echo 192.168.1.2 not responding


The ping command returns errorlevel 0 if sucessful and errorlevel 1 if not.

 

could you explain that to me a little bit i am lost. like where it goes into my script.

 

The most likely place is somewhre in homer.bat, but you didn't post that code. I assume that's where the pinging takes place?

 

yes in homer.bat the command is

ping homer

and then thats it.

 

Replace the code in homer.bat with this

@echo off
ping -n 1 192.168.1.2 | find "TTL=" || EXIT

If 192.168.1.2 does not answer the ping the batch file will exit.

 

thank you. could you explain to me why it does that so i can do it later and understand it.

 

I don't understand what you mean by "why it does that" ?

The output of the ping command is sent (piped) to the find command which looks for "TTL=" in the information returned from the ping command. It will only find the "TTL=" in the ping return if 192.168.1.2 answers. If there is no "TTL=" in the data returned from the ping command then an ERRORLEVEL 0 condition will be returned which will execute the command after the "||" and EXIT the program instead of doing a RETURN from the call.

 

that is what i wanted to know. thanks alot.

 

No problem.