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#!perl
use strict;
use warnings;
use Test::More tests => 8;
use File::Map qw/:map protect PROT_NONE/;
use IO::Handle;
use Test::Fatal qw/lives_ok exception/;
use Test::Warnings;
open my $copy, "+<:raw", undef or die "Couldn't create tempfile: $!";
$copy->autoflush(1);
print $copy "0123456789"x10;
my $mmaped;
lives_ok { map_handle($mmaped, $copy, '+<') } "map succeeded";
my $howmany = $mmaped =~ tr/9/_/;
is($mmaped, "012345678_" x 10, "$howmany characters exchanged");
protect $mmaped, '<';
like(exception { $mmaped =~ tr/_/:/ }, qr/Modification of a read-only value attempted/, 'now read only');
is($mmaped, "012345678_" x 10, "still the same value");
protect $mmaped, '+<';
lives_ok { $mmaped =~ tr/_/:/ } 'now writable again';
is($mmaped, "012345678:" x 10, "written");
SKIP: {
skip("Fork doesn't work as expected on Windows", 1) if $^O eq "MSWin32";
fail("Could not fork!") if not defined (my $pid = fork);
if ($pid) {
waitpid $pid, 0;
ok $? & 127, 'got SIGSEGV as expected';
}
else {
protect $mmaped, PROT_NONE;
my $var = substr $mmaped, 0, 3;
die "Should have been dead\n";
}
}
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