parsing rsync output

hello. i need to make an HTML with the progress output of a rsync command. i'm doing this:

open (CORE, "/usr/bin/rsync $rsyncOPT --progress $outbox $inbox |");
while (<CORE>) {
    # code
}
[download]

but the problem is that the progress update sends \r and the loop doesn't see the line until it finish the transfer and sends a \n. i try:

local $/="\r";
[download]

but on small files never sends a \r because the transfer finish quickly. i need to have two $/. any ideas?

Comment on parsing rsync output
Select or Download Code

Re: parsing rsync output
by gamache (Friar) on Nov 21, 2007 at 14:21 UTC

\r

[reply]
[d/l]

Re^2: parsing rsync output

by eddor1614 (Beadle) on Nov 21, 2007 at 14:30 UTC

yes. i made an error in the post. sorry. i'm using double quotes.

[reply]

Re: parsing rsync output
by jasonk (Parson) on Nov 22, 2007 at 02:51 UTC

You've got a buffering problem. One option would be to set $/ to a reference to an integer, which will cause perl to give you a chunk of that many bytes on each read, rather than reading a line at a time. If you do this though, you then have to deal with assembling the records into lines yourself. Something like this should work...

open ( CORE, "/usr/bin/rsync $rsyncOPT --progress $outbox $inbox |" );
local $/ = \128; # read 128 bytes at a time
my $buffer = '';
while( <CORE> ) {
    $buffer .= $_;
    while ( $buffer =~ s/^(.*?)[\r\n]// ) {
        local $_ = $1;
        # code
    }
}
[download]

Another (possibly better) option would be to use Expect, which is designed for this type of application...

We're not surrounded, we're in a target-rich environment!


Perl Monk, Perl Meditation
	PerlMonks

parsing rsync output

How many continents have you visited?