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# NOTE: this file tests how large files (>2GB) work with raw system IO.
# open(), tell(), seek(), print(), read() are tested in t/op/lfs.t.
# If you modify/add tests here, remember to update also t/op/lfs.t.
BEGIN {
# Don't bother if there are no quads.
eval { my $q = pack "q", 0 };
if ($@) {
print "1..0\n# no 64-bit types\n";
bye();
}
chdir 't' if -d 't';
unshift @INC, '../lib';
require Config; import Config;
# Don't bother if there are no quad offsets.
if ($Config{lseeksize} < 8) {
print "1..0\n# no 64-bit file offsets\n";
bye();
}
require Fcntl; import Fcntl;
}
sub bye {
close(BIG);
unlink "big";
exit(0);
}
# Known have-nots.
if ($^O eq 'win32' || $^O eq 'vms') {
print "1..0\n# no sparse files\n";
bye();
}
# Then try to deduce whether we have sparse files.
# We'll start off by creating a one megabyte file which has
# only three "true" bytes. If we have sparseness, we should
# consume less blocks than one megabyte (assuming nobody has
# one megabyte blocks...)
sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
do { warn "sysopen failed: $!\n"; bye };
sysseek(BIG, 1_000_000, SEEK_SET);
syswrite(BIG, "big");
close(BIG);
my @s;
@s = stat("big");
print "# @s\n";
unless (@s == 13 &&
$s[7] == 1_000_003 &&
defined $s[11] &&
defined $s[12] &&
$s[11] * $s[12] < 1000_003) {
print "1..0\n# no sparse files?\n";
bye();
}
# By now we better be sure that we do have sparse files:
# if we are not, the following will hog 5 gigabytes of disk. Ooops.
print "1..8\n";
my $fail = 0;
sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
do { warn "sysopen failed: $!\n"; bye };
sysseek(BIG, 5_000_000_000, SEEK_SET);
syswrite(BIG, "big");
close BIG;
@s = stat("big");
print "# @s\n";
sub fail () {
print "not ";
$fail++;
}
fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
print "ok 1\n";
fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
print "ok 2\n";
sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
sysseek(BIG, 4_500_000_000, SEEK_SET);
fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
print "ok 3\n";
sysseek(BIG, 1, SEEK_CUR);
fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
print "ok 4\n";
sysseek(BIG, -1, SEEK_CUR);
fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
print "ok 5\n";
sysseek(BIG, -3, SEEK_END);
fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
print "ok 6\n";
my $big;
fail unless sysread(BIG, $big, 3) == 3;
print "ok 7\n";
fail unless $big eq "big";
print "ok 8\n";
bye();
if ($fail) {
print STDERR <<EOM;
#
# If the lfs (large file support) tests fail, it means that
# the *file system* you are running the tests on doesn't support
# large files (files larger than two gigabytes). Perl may still
# be able to support such files, once you have such a file system.
#
EOM
}
# eof
|
