How to redirect STDIN from within a batch file?

dahamsta · 31-08-2002 11:31PM #1

Heh, it's not often I get to ask a question in here. And this is a really silly one:

I have a command line exe called bzip (compression utility) in my windows directory, which has a switch (-d) to decompress a file. On Linux, you also have bunzip2, and I keep typing that in in Windows by mistake. So my question is: How do I redirect stdin from within a batch file?

adam

dahamsta · 02-09-2002 11:36AM

hup

jd · 02-09-2002 11:50AM

I think it is..

command < file Command gets standard input from file

didn't try it though

seamus · 02-09-2002 12:23PM

OK, not entirely following you, but maybe what you're looking for, is a second bunzio2 thingy like:

bunzip2.bat

bzip -d < %1

where then you'd just type:

bunzip2 input.txt

I'm not sure if you can take '<' into account in a batch file.......but I'm going searching now...

dahamsta · 02-09-2002 02:03PM

That'll do it, but it prints to stdout. Hmmm...

adam

jd · 02-09-2002 04:37PM

Originally posted by dahamsta
That'll do it, but it prints to stdout. Hmmm...

adam

>output.txt

Hobbes · 03-09-2002 10:33AM

< = accept inputs
> = display STDOUT to where ever
>> = Display STDOUT appending to where ever.

2> = Display STDERR to where ever
2>&1 = Display STDERR to whatever STDOUT is set to.

and you have append (>>) for STDERR as well.

examples:

command < %1 > null 2> errors.txt

command < con: >> output.txt 2>&1

How to redirect STDIN from within a batch file?

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