Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Re (tilly) 1: How to preserve the value of STDIN

by tilly (Archbishop)
on Sep 22, 2000 at 03:22 UTC ( [id://33587]=note: print w/replies, xml ) Need Help??


in reply to How to preserve the value of STDIN

Ick.

Untested:

use IO::Scalar; my $data; tie *HACK, 'IO::Scalar', \$data; print HACK <STDIN>; tied(*HACK)->setpos(0); *STDIN = *HACK;
Now if you don't destroy anything, reading from STDIN gives you what is already in $data which is what was in STDIN.

UPDATE
The idea was good but apparently copying tied stuff like that does not maintain the tie. (I shoulda known that, sorry.) Try this code instead:

use IO::Scalar; $data = join '', <STDIN>; my $s; tie *STDIN, 'IO::Scalar', \$s; print STDIN $data; tied(*STDIN)->setpos(0);
I tested this by adding
print $data; print <STDIN>;
after it, running it, and typing into it.

My apologies for the initial mistake.

Replies are listed 'Best First'.
(Ovid) RE: Re (tilly) 1: How to preserve the value of STDIN
by Ovid (Cardinal) on Sep 22, 2000 at 03:58 UTC
      I don't understand why it works, this is pure magic

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://33587]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others having a coffee break in the Monastery: (3)
As of 2024-03-29 14:52 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found