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Full Discussion: Perl open(CMD, "cmd |"); buffering problem..
Top Forums Shell Programming and Scripting Perl open(CMD, "cmd |"); buffering problem.. Post 302593140 by Shawn, Lee on Wednesday 25th of January 2012 08:11:37 PM
Old 01-25-2012
Perl open(CMD, "cmd |"); buffering problem..
Hello,

There's a third-party application's command that shows the application's status like "tail -f verybusy.log". When use the command, the output comes every 1-sec. but when it goes in a script below the output comes every 8-sec...What is the problem and how can I fix it?

Code:
open(CMD, "/appbin/command |");
while(<CMD>){
        print;
}
close(CMD);

Thanks,
 

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LEARN ABOUT DEBIAN

sup-cmd

SUP-CMD(1)						      General Commands Manual							SUP-CMD(1)

NAME

       sup-cmd - connect to a running sup-server

SYNOPSIS

       sup-cmd [global options] command [options]

DESCRIPTION

       Connect to a running sup-server and execute command.

       Valid commands are:

	      query count label add

OPTIONS

       --archive, -a
	      Automatically archive all new messages from these sources.

       --unusual, -u
	      Do not automatically poll these sources for new messages.

       --labels, -l label
	      A comma-separated set of labels to apply to all messages from this source

       --force-new, -f
	      Create a new account for this source, even if one already exists.

       --force-account, -o account
	      Reuse previously defined account user@hostname

       --version, -v
	      Print version and exit

       --help, -h
	      Show help message

SEE ALSO

       sup-mail(1), sup-server(1)

AUTHOR

       Sup was written by William Morgan <wmorgan-sup@masanjin.net>.

       This manual page was written by Per Andersson <avtobiff@gmail.com> for the Debian project (but may be used by others).

								   April 9, 2012							SUP-CMD(1)
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