# 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.
+# stdio: open(), tell(), seek(), print(), read() is 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";
- exit(0);
- }
chdir 't' if -d 't';
unshift @INC, '../lib';
require Config; import Config;
print "1..0\n# no 64-bit file offsets\n";
exit(0);
}
- require Fcntl; import Fcntl;
+ require Fcntl; import Fcntl qw(/^O_/ /^SEEK_/);
}
-sub bye {
+sub zap {
close(BIG);
- unlink "big";
+ unlink("big");
+ unlink("big1");
+ unlink("big2");
+}
+
+sub bye {
+ zap();
exit(0);
}
EOM
}
+print "# checking whether we have sparse files...\n";
+
# Known have-nots.
if ($^O eq 'win32' || $^O eq 'vms') {
- print "1..0\n# no sparse files\n";
+ print "1..0\n# no sparse files (because this is $^O) \n";
bye();
}
# Known haves that have problems running this test
# (for example because they do not support sparse files, like UNICOS)
if ($^O eq 'unicos') {
- print "1..0\n# large files known to work but unable to test them here\n";
+ print "1..0\n# large files known to work but unable to test them here ($^O)\n";
bye();
}
-# Then try to deduce whether we have sparse files.
+# Then try heuristically 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);
+sysopen(BIG, "big1", O_WRONLY|O_CREAT|O_TRUNC) or
+ do { warn "sysopen big1 failed: $!\n"; bye };
+sysseek(BIG, 1_000_000, SEEK_SET) or
+ do { warn "sysseek big1 failed: $!\n"; bye };
+syswrite(BIG, "big") or
+ do { warn "syswrite big1 failed; $!\n"; bye };
+close(BIG) or
+ do { warn "close big1 failed: $!\n"; bye };
-my @s;
+my @s1 = stat("big1");
-@s = stat("big");
+print "# s1 = @s1\n";
-print "# @s\n";
+sysopen(BIG, "big2", O_WRONLY|O_CREAT|O_TRUNC) or
+ do { warn "sysopen big2 failed: $!\n"; bye };
+sysseek(BIG, 2_000_000, SEEK_SET) or
+ do { warn "sysseek big2 failed: $!\n"; bye };
+syswrite(BIG, "big") or
+ do { warn "syswrite big2 failed; $!\n"; bye };
+close(BIG) or
+ do { warn "close big2 failed: $!\n"; bye };
-my $BLOCKSIZE = $s[11] || 512;
+my @s2 = stat("big2");
-unless (@s == 13 &&
- $s[7] == 1_000_003 &&
- defined $s[12] &&
- $BLOCKSIZE * $s[12] < 1_000_003) {
- print "1..0\n# no sparse files?\n";
- bye();
+print "# s2 = @s2\n";
+
+zap();
+
+unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 &&
+ $s1[11] == $s2[11] && $s1[12] == $s2[12]) {
+ print "1..0\n#no sparse files?\n";
+ bye;
}
+print "# we seem to have sparse files...\n";
+
# 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.
$ENV{LC_ALL} = "C";
sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
- do { warn "sysopen failed: $!\n"; bye };
-sysseek(BIG, 5_000_000_000, SEEK_SET);
+ do { warn "sysopen 'big' failed: $!\n"; bye };
+my $sysseek = sysseek(BIG, 5_000_000_000, SEEK_SET);
+unless (defined $sysseek && $sysseek == 5_000_000_000) {
+ print "1..0\n# seeking past 2GB failed: $! (sysseek returned ",
+ defined $sysseek ? $sysseek : 'undef', ")\n";
+ explain();
+ bye();
+}
# The syswrite will fail if there are are filesize limitations (process or fs).
-my $syswrite = syswrite(BIG, "big") == 3;
-my $close = close BIG if $syswrite;
+my $syswrite = syswrite(BIG, "big");
+print "# syswrite failed: $! (syswrite returned ",
+ defined $syswrite ? $syswrite : 'undef', ")\n"
+ unless defined $syswrite && $syswrite == 3;
+my $close = close BIG;
+print "# close failed: $!\n" unless $close;
unless($syswrite && $close) {
- unless ($syswrite) {
- print "# syswrite failed: $!\n"
- } else {
- print "# close failed: $!\n"
- }
if ($! =~/too large/i) {
print "1..0\n# writing past 2GB failed: process limits?\n";
} elsif ($! =~ /quota/i) {
print "# @s\n";
+unless ($s[7] == 5_000_000_003) {
+ print "1..0\n# not configured to use large files?\n";
+ explain();
+ bye();
+}
+
sub fail () {
print "not ";
$fail++;
print "ok 14\n";
# 705_032_704 = (I32)5_000_000_000
-fail unless seek(BIG, 705_032_704, $SEEK_SET);
+fail unless seek(BIG, 705_032_704, SEEK_SET);
print "ok 15\n";
my $zero;