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#!perl -w
# Test O_EXLOCK
use Test::More;
use strict;
use Fcntl;
BEGIN {
# see if we have O_EXLOCK
eval { &Fcntl::O_EXLOCK; };
if ($@) {
plan skip_all => 'Do not seem to have O_EXLOCK';
} else {
plan tests => 4;
use_ok( "File::Temp" );
}
}
# Need Symbol package for lexical filehandle on older perls
require Symbol if $] < 5.006;
# Get a tempfile with O_EXLOCK
my $fh = new File::Temp();
ok( -e "$fh", "temp file is present" );
# try to open it with a lock
my $flags = O_CREAT | O_RDWR | O_EXLOCK;
my $timeout = 5;
my $status;
eval {
local $SIG{ALRM} = sub { die "alarm\n" }; # NB: \n required
alarm $timeout;
my $newfh;
$newfh = &Symbol::gensym if $] < 5.006;
$status = sysopen($newfh, "$fh", $flags, 0600);
alarm 0;
};
if ($@) {
die unless $@ eq "alarm\n"; # propagate unexpected errors
# timed out
}
ok( !$status, "File $fh is locked" );
# Now get a tempfile with locking disabled
$fh = new File::Temp( EXLOCK => 0 );
eval {
local $SIG{ALRM} = sub { die "alarm\n" }; # NB: \n required
alarm $timeout;
my $newfh;
$newfh = &Symbol::gensym if $] < 5.006;
$status = sysopen($newfh, "$fh", $flags, 0600);
alarm 0;
};
if ($@) {
die unless $@ eq "alarm\n"; # propagate unexpected errors
# timed out
}
ok( $status, "File $fh is not locked");
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