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# -*- cperl -*-
# Copyright (c) 2008 MySQL AB, 2008, 2009 Sun Microsystems, Inc.
# Use is subject to license terms.
#
# 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; version 2 of the License.
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA
package My::Platform;
use strict;
use File::Basename;
use File::Path;
use base qw(Exporter);
our @EXPORT= qw(IS_CYGWIN IS_WINDOWS IS_WIN32PERL
native_path posix_path mixed_path
check_socket_path_length process_alive open_for_append);
BEGIN {
if ($^O eq "cygwin") {
# Make sure cygpath works
if ((system("cygpath > /dev/null 2>&1") >> 8) != 1){
die "Could not execute 'cygpath': $!";
}
eval 'sub IS_CYGWIN { 1 }';
}
else {
eval 'sub IS_CYGWIN { 0 }';
}
if ($^O eq "MSWin32") {
eval 'sub IS_WIN32PERL { 1 }';
}
else {
eval 'sub IS_WIN32PERL { 0 }';
}
}
BEGIN {
if (IS_CYGWIN or IS_WIN32PERL) {
eval 'sub IS_WINDOWS { 1 }';
}
else {
eval 'sub IS_WINDOWS { 0 }';
}
}
#
# native_path
# Convert from path format used by perl to the underlying
# operating systems format
#
# NOTE
# Used when running windows binaries (that expect windows paths)
# in cygwin perl (that uses unix paths)
#
use Memoize;
if (!IS_WIN32PERL){
memoize('mixed_path');
memoize('native_path');
memoize('posix_path');
}
sub mixed_path {
my ($path)= @_;
if (IS_CYGWIN){
return unless defined $path;
my $cmd= "cygpath -m $path";
$path= `$cmd` or
print "Failed to run: '$cmd', $!\n";
chomp $path;
}
return $path;
}
sub native_path {
my ($path)= @_;
$path=~ s/\//\\/g
if (IS_CYGWIN or IS_WIN32PERL);
return $path;
}
sub posix_path {
my ($path)= @_;
if (IS_CYGWIN){
return unless defined $path;
$path= `cygpath $path`;
chomp $path;
}
return $path;
}
use File::Temp qw /tempdir/;
sub check_socket_path_length {
my ($path)= @_;
return 0 if IS_WINDOWS;
# This may not be true, but we can't test for it on AIX due to Perl bug
# See Bug #45771
return 0 if ($^O eq 'aix');
# See Debian bug #670722 - failing on kFreeBSD even after setting short path
return 0 if $^O eq 'gnukfreebsd' and length $path < 40;
# GNU/Hurd doesn't have hostpath(), but no limitation either
return 0 if $^O eq 'gnu';
require IO::Socket::UNIX;
my $truncated= undef;
# Create a tempfile name with same length as "path"
my $tmpdir = tempdir( CLEANUP => 0);
my $len = length($path) - length($tmpdir) - 1;
my $testfile = $tmpdir . "/" . "x" x ($len > 0 ? $len : 1);
my $sock;
eval {
$sock= new IO::Socket::UNIX
(
Local => $testfile,
Listen => 1,
);
$truncated= 1; # Be negatvie
die "Could not create UNIX domain socket: $!"
unless defined $sock;
die "UNIX domain socket path was truncated"
unless ($testfile eq $sock->hostpath());
$truncated= 0; # Yes, it worked!
};
die "Unexpected failure when checking socket path length: $@"
if $@ and not defined $truncated;
$sock= undef; # Close socket
rmtree($tmpdir); # Remove the tempdir and any socket file created
return $truncated;
}
sub process_alive {
my ($pid)= @_;
die "usage: process_alive(pid)" unless $pid;
return kill(0, $pid) unless IS_WINDOWS;
my @list= split(/,/, `tasklist /FI "PID eq $pid" /NH /FO CSV`);
my $ret_pid= eval($list[1]);
return ($ret_pid == $pid);
}
use Symbol qw( gensym );
use if $^O eq 'MSWin32', 'Win32API::File', qw( CloseHandle CreateFile GetOsFHandle OsFHandleOpen OPEN_ALWAYS FILE_APPEND_DATA
FILE_SHARE_READ FILE_SHARE_WRITE FILE_SHARE_DELETE );
use if $^O eq 'MSWin32', 'Win32::API';
use constant WIN32API_FILE_NULL => [];
# Open a file for append
# On Windows we use CreateFile with FILE_APPEND_DATA
# to insure that writes are atomic, not interleaved
# with writes by another processes.
sub open_for_append
{
my ($file) = @_;
my $fh = gensym();
if (IS_WIN32PERL)
{
my $handle;
if (!($handle = CreateFile(
$file,
FILE_APPEND_DATA(),
FILE_SHARE_READ()|FILE_SHARE_WRITE()|FILE_SHARE_DELETE(),
WIN32API_FILE_NULL,
OPEN_ALWAYS(),# Create if doesn't exist.
0,
WIN32API_FILE_NULL,
)))
{
return undef;
}
if (!OsFHandleOpen($fh, $handle, 'wat'))
{
CloseHandle($handle);
return undef;
}
return $fh;
}
open($fh,">>",$file) or return undef;
return $fh;
}
1;
|
