0x1998 - MANAGER
Edit File: File.pm
# Copyright © 2011 Raphaël Hertzog <hertzog@debian.org> # Copyright © 2012 Guillem Jover <guillem@debian.org> # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <https://www.gnu.org/licenses/>. package Dpkg::File; use strict; use warnings; our $VERSION = '0.01'; our @EXPORT = qw( file_lock file_slurp ); use Exporter qw(import); use Fcntl qw(:flock); use Dpkg::Gettext; use Dpkg::ErrorHandling; sub file_lock($$) { my ($fh, $filename) = @_; # A strict dependency on libfile-fcntllock-perl being it an XS module, # and dpkg-dev indirectly making use of it, makes building new perl # package which bump the perl ABI impossible as these packages cannot # be installed alongside. eval q{ pop @INC if $INC[-1] eq '.'; use File::FcntlLock; }; if ($@) { # On Linux systems the flock() locks get converted to file-range # locks on NFS mounts. if ($^O ne 'linux') { warning(g_('File::FcntlLock not available; using flock which is not NFS-safe')); } flock($fh, LOCK_EX) or syserr(g_('failed to get a write lock on %s'), $filename); } else { eval q{ my $fs = File::FcntlLock->new(l_type => F_WRLCK); $fs->lock($fh, F_SETLKW) or syserr(g_('failed to get a write lock on %s'), $filename); } } } sub file_slurp { my $fh = shift; local $/; my $data = <$fh>; return $data; } 1;