Provided by: libfile-rsync-perl_0.43-1_all 
NAME
File::Rsync - perl module interface to rsync(1) http://rsync.samba.org/rsync/
SYNOPSIS
use File::Rsync;
$obj = File::Rsync->new( { archive => 1, compress => 1,
rsh => '/usr/local/bin/ssh',
'rsync-path' => '/usr/local/bin/rsync' } );
$obj->exec( { src => 'localdir', dest => 'rhost:remdir' } )
or warn "rsync failed\n";
DESCRIPTION
Perl Convenience wrapper for the rsync(1) program. Written for rsync-2.3.2 and updated
for rsync-2.6.0 but should perform properly with most recent versions.
File::Rsync::new
$obj = new File::Rsync;
or
$obj = File::Rsync->new;
or
$obj = File::Rsync->new(@options);
or
$obj = File::Rsync->new(\%options);
Create a File::Rsync object. Any options passed at creation are stored in the object
as defaults for all future exec calls on that object. Options may be passed in the
form of a hash and are the same as the long options in rsync(1) with the leading
double-dash removed. An additional option of path-to-rsync also exists which can be
used to override the hardcoded path to the rsync binary that is defined when the
module is installed, and debug which causes the module methods to print some debugging
information to STDERR. There are also 2 options to wrap the source and/or destination
paths in double-quotes. They are quote-src and quote-dst, and may be useful in
protecting the paths from shell expansion (particularly useful for paths containing
spaces). The outfun and errfun options take a function reference. The function is
called once for each line of output from the rsync program with the output line passed
in as the first argument, the second arg is either 'out' or 'err' depending on the
source. This makes it possible to use the same function for both and still determine
where the output came from. Options may also be passed as a reference to a hash. The
exclude option needs an array reference as its value, since there cannot be duplicate
keys in a hash. There is an equivalent include option. Only an exclude or include
option should be used, not both. Use the '+ ' or '- ' prefix trick to put includes in
an exclude array, or to put excludes in an include array (see rsync(1) for details).
Include/exclude options form an ordered list. The order must be retained for proper
execution. There are also source and dest keys. The key src is also accepted as an
equivalent to source, and dst or destination may be used as equivalents to dest. The
source option may take a scalar or an array reference. If the source is the local
system then multiple source paths are allowed. In this case an array reference should
be used. There is also a method for passing multiple source paths to a remote system.
This method may be triggered in this module by passing the remote hostname to the
srchost key and passing an array reference to the source key. If the source host is
being accessed via an Rsync server, the remote hostname should have a single trailing
colon on the name. When rsync is called, the srchost value and the values in the
source array will be joined with a colon resulting in the double-colon required for
server access. The dest key only takes a scalar since rsync only accepts a single
destination path.
Version 2.6.0 of rsync(1) provides a new files-from option along with a few other
supporting options (from0, no-relative, and no-implied-dirs). To support this
wonderful new option at the level it deserves, this module now has an additional
parameter. If files-from is set to '-' (meaning read from stdin) you can define infun
to be a reference to a function that prints your file list to the default file handle.
The output from the function is attached to stdin of the rsync call during exec. If
infun is defined it will be called regardless of the value of files-from, so it can
provide any data expected on stdin, but keep in mind that stdin will not be attached
to a tty so it is not very useful for sending passwords (see the rsync(1) and ssh(1)
man pages for ways to handle authentication). The rsync(1) man page has a more
complete description of files-from. Also see File::Find for ideas to use with files-
from and infun. The infun option may also be used with the include-from or exclude-
from settings, but this is generally more clumsy than using the include or exclude
arrays.
Version 2.6.3 of rsync(1) provides new options partial-dir, checksum-seed, keep-
dirlinks, inplace, ipv4, and ipv6. Version 2.6.4 of rsync(1) provides new options
del, delete-before delete-during, delay-updates, dirs, filter, fuzzy, itemize-changes,
list-only, omit-dir-times, remove-sent-files, max-size, and protocol.
Version 0.38 of this module also adds support for the acls option that is not part of
rsync(1) unless the patch has been applied, but people do use it. It also includes a
new literal option that takes an array reference similar to include, exclude, and
filter. Any arguments in the array are passed as literal arguments to rsync, and are
passed first. They should have the proper single or double hyphen prefixes and the
elements should be split up the way you want them passed to exec. The purpose of this
option is to allow the use of arbitrary options added by patches, and/or to allow the
use of new options in rsync without needing an imediate update to the module in
addtition to rsync(1) itself.
File::Rsync::defopts
$obj->defopts(@options);
or
$obj->defopts(\%options);
Set default options for future exec calls for the object. See rsync(1) for a complete
list of valid options. This is really the internal method that new calls but you can
use it too. The verbose and quiet options to rsync are actually counters. When
assigning the perl hash-style options you may specify the counter value directly and
the module will pass the proper number of options to rsync.
File::Rsync::getcmd
my $cmd = $obj->getcmd(@options);
or
my $cmd = $obj->getcmd(\%options);
or
my ($cmd, $infun, $outfun, $errfun, $debug) = $obj->getcmd(\%options);
getcmd returns a reference to an array containing the real rsync command that would be
called if the exec function were called. The last example above includes a reference
to the optional stdin function, stdout function, stderr function, and the debug
setting. This is the form used by the exec method to get the extra parameters it
needs to do its job. The function is exposed to allow a user-defined exec function to
be used, or for debugging purposes.
File::Rsync::exec
$obj->exec(@options) or warn "rsync failed\n";
or
$obj->exec(\%options) or warn "rsync failed\n";
This is the method that does the real work. Any options passed to this routine are
appended to any pre-set options and are not saved. They effect the current execution
of rsync only. In the case of conflicts, the options passed directly to exec take
precedence. It returns 1 if the return status was zero (or true), if the rsync return
status was non-zero it returns 0 and stores the return status. You can examine the
return status from rsync and any output to stdout and stderr with the methods listed
below.
File::Rsync::list
$out = $obj->list(@options);
or
$out = $obj->list(\%options);
or
@out = $obj->list(\%options);
This is a wrapper for exec called without a destination to get a listing. It returns
the output of stdout like the out function below. When no destination is given rsync
returns the equivalent of 'ls -l' or 'ls -lr' modified by any include/exclude/filter
parameters you specify. This is useful for manual comparison without actual changes
to the destination or for comparing against another listing taken at a different point
in time.
(As of rsync version 2.6.4-pre1 this can also be accomplished with the 'list-only'
option regardless of whether a destination is given.)
File::Rsync::status
$rval = $obj->status;
Returns the status from last exec call right shifted 8 bits.
File::Rsync::realstatus
$rval = $obj->realstatus;
Returns the real status from last exec call (not right shifted).
File::Rsync::err
$aref = $obj->err;
In a scalar context this method will return a reference to an array containing all
output to stderr from the last exec call, or zero (false) if there was no output. In
an array context it will return an array of all output to stderr or an empty list.
The scalar context can be used to efficiently test for the existance of output. rsync
sends all messages from the remote rsync process and any error messages to stderr.
This method's purpose is to make it easier for you to parse that output for
appropriate information.
File::Rsync::out
$aref = $obj->out;
Similar to the err method, in a scalar context it returns a reference to an array
containing all output to stdout from the last exec call, or zero (false) if there was
no output. In an array context it returns an array of all output to stdout or an
empty list. rsync sends all informational messages (verbose option) from the local
rsync process to stdout.
File::Rsync::lastcmd
$aref = $obj->lastcmd;
Returns the actual system command used by the last exec call, or '' before any calls
to exec for the object. This can be useful in the case of an error condition to give
a more informative message or for debugging purposes. In an array context it return
an array of args as passed to the system, in a scalar context it returns a space-
seperated string. See getcmd for access to the command before execution.
Author
Lee Eakin <leakin@dfw.nostrum.com>
Credits
The following people have contributed ideas, bug fixes, code or helped out by reporting or
tracking down bugs in order to improve this module since it's initial release. See the
Changelog for details:
Greg Ward
Boris Goldowsky
James Mello
Andreas Koenig
Joe Smith
Jonathan Pelletier
Heiko Jansen
Tong Zhu
Paul Egan
Ronald J Kimball
James CE Johnson
Bill Uhl
Peter teStrake
Harald Flaucher
Simon Myers
Gavin Carr
Petya Kohts
Inspiration and Assistance
Gerard Hickey "PGP::Pipe"
Russ Allbery "PGP::Sign"
Graham Barr "Net::*"
Andrew Tridgell and Paul Mackerras rsync(1)
John Steele <steele@nostrum.com>
Philip Kizer <pckizer@nostrum.com>
Larry Wall perl(1)
I borrowed many clues on wrapping an external program from the PGP modules, and I would
not have had such a useful tool to wrap except for the great work of the rsync authors.
Thanks also to Graham Barr, the author of the libnet modules and many others, for looking
over this code. Of course I must mention the other half of my brain, John Steele, and his
good friend Philip Kizer for finding rsync and bringing it to my attention. And I would
not have been able to enjoy writing useful tools if not for the creator of the perl
language.
Copyrights
Copyright (c) 1999-2005 Lee Eakin. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.