# 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;
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 ($^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
print "# @s\n";
-my $BLOCKSIZE = 512; # is this really correct everywhere?
+my $BLOCKSIZE = $s[11] || 512;
unless (@s == 13 &&
$s[7] == 1_000_003 &&
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: $!\n"
- }
- if ($! =~/File too large/) {
- print "1..0\n# writing past 2GB failed\n";
- explain();
+ if ($! =~/too large/i) {
+ print "1..0\n# writing past 2GB failed: process limits?\n";
+ } elsif ($! =~ /quota/i) {
+ print "1..0\n# filesystem quota limits?\n";
}
+ explain();
bye();
}
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++;
bye(); # does the necessary cleanup
+END {
+ unlink "big"; # be paranoid about leaving 5 gig files lying around
+}
+
# eof