batch files and drive letters

i have a set of apps that i use 10-15 time a day (i install them back to back) so i made a batch file to install them and put it (and the apps) on a flash driver.

from time to time the driver letter of the flash drive is not E: so ever thing is not on E:\ there D:\ or F:\ or WHATEVER:\

so the quston is what is the batch variable so it goes to "USB that has the .bat\apps\run this\ect..."


Thanks for any help

 

Hi hacker183.

The own call of your batch file is in %0. So if you need only the drive letter you can find it in %~d0.

Code:

@echo off &setlocal
echo my own drive: %~d0
pause

regards
GermanOne

 

thank you thats what i need

 

ok so its not what i was needing but it helps... I need some way to see the full path that the bat is started in so if its in "C\apps\auto install\my.bat" or if its on a flash driver at "D:\the new app\other\more other" it will fix it so its all good...

thanks again...

 

well a less efficient way is to skip the drive letter so it looks like

 

aaahhh ok I thought you had to have a driver letter and a full path to start anything... i can just have a file structure with the batch at top.. ok thanks a lot.

 

ya just some portable apps that are self contained wont run with start option like my opera browser

but it should work pretty good

 

Hi guys,

if you've got a parameter variable like %0, you can use
%~d0 for the directory
%~p0 for the path
%~n0 for the name
%~x0 for the extension
and it's also possible to use a combination.

So if you need the whole path (directory and path) of your batch file you have to use %~dp0 . red death68's way isn't really safe.

regards
GermanOne

 

why isnt it safe?

 

Hi red death68.

The reason is that your solution is "relative" and not "absolute". You always have to watch up where you are. That means if you changed the working directory using CD /D or PUSHD, it doesn't work. The content of %0 never changed.
But you are right, with high probability it will work for hacker183.

regards
GermanOne

 

Ok thanks for all the help and red's way works but I'm going to use the parameter variables just to keep it clean thanks for every thing.