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Full Discussion: Script Output Woes (stdout?)
Top Forums Shell Programming and Scripting Script Output Woes (stdout?) Post 302079337 by c0nn0r on Sunday 9th of July 2006 02:56:41 PM
Old 07-09-2006
Script Output Woes (stdout?)
Hey everyone.

I have been trying a few filtering scripts with both SED and PERL. So far I have both of these versions working to reformat the incoming text stream (from stdin) into the corrent format (it looks good in the terminal), but I don't think that I am doing it right because the formatted text is not available to other applications/operations... but I can see it coming through in the terminal? Is this weird?

this is my setup:

% foo.app | perlFilter.pl

Works great - I can see it in the terminal, but

% foo.app | perlFilter > text

puts nothing into the file text!

% foo.app | perlFilter | nc 127.0.0.1 5001

Shows nothing going through to

nc -l -p 5001

Running nc in verbose mode shows that nothing is going through...

Here is my PERL script:

Code:
#!/usr/bin/perl

while (<>)  {
    $input = $_;
    chomp ($input);
    printf("%s;\n\r", $input);
    }

Do I need to explicitly write out to stdout or something?

I'm a newb.
 

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LEARN ABOUT OSX

icecream

ICECREAM(1)							     icecream							       ICECREAM(1)

NAME

       icecream - download icecast and shoutcast streams, redirecting all fetched content to stdout and/or to disk at the same time

SYNOPSIS

       icecream [OPTIONS] URL [URL..]

DESCRIPTION

       icecream is a lightweight, non-interactive, stream download utility.  It connects to icecast and shoutcast servers or direct stream URLs,
       and redirects all fetched content to stdout and/or to media files on your disk.

       Listen to the stream piping the output to a stdin-capable media player.	Save the stream to a named file or split it into different tracks.
       It is possible to redirect the stream and save it to disk at the same time.

       icecream is able to parse pls and m3u playlists, and to download mp3 and ogg direct stream URLs. If the stream is anonymous it will be
       saved as 'stream-time.mp3', where time is actual timestamp.

OPTIONS

       -h, --help
	       Print a help message describing all options

       -q, --quiet
	       Turn off output

       -v, --verbose
	       Be verbose

       -t, --tracks
	       Split stream into tracks (if possible)

       --name=NAME
	       Save the stream to file specified by NAME. Format codes starting with "%" will be replaced. See the date command for valid format
	       codes.

       --stop=N[units]
	       Stop downloading the stream after N kb/mb/min/songs

       --user-agent=AGENT
	       Set user-agent header to AGENT

       --stdout
	       Output stream to stdout (implies -q)

       --sync  Turn syncing on, required for some mpeg players that read from stdin

       --debug Turn on debugging outputs

EXAMPLES

       Streaming to mpg123
	       icecream --stdout http://radio.com/playlist.pls | mpg123 -

       Split stream into different tracks
	       icecream -t http://metal.org/radio.pls

       Split stream into tracks and play with vlc at the same time
	       icecream -t --stdout http://streaming.com/playlist.pls | vlc file:/dev/stdin

       Prepare a 74 minute CD
	       icecream -t --stop 74min http://trace.net/playlist.m3u

       Use a filename with today's date as output
	       icecream -q --name 'radio_%Y_%m_%d' --stop 60min http://radio.com/playlist.pls

BUGS

       You are welcome to send bug reports about icecream to our mailing list.	Feel free to visit http://icecream.sourceforge.net

AUTHOR

       Written by Gil Megidish <gil at megidish.net>

1.3								    2008-04-28							       ICECREAM(1)
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