print <<EOM;
#
# If the lfs (large file support: large meaning larger than two gigabytes)
-# tests are skipped or fail, it may mean either that your process is not
-# allowed to write large files or that the file system you are running
-# the tests on doesn't support large files, or both. You may also need
-# to reconfigure your kernel. (This is all very system-dependent.)
+# tests are skipped or fail, it may mean either that your process
+# (or process group) is not allowed to write large files (resource
+# limits) or that the file system you are running the tests on doesn't
+# let your user/group have large files (quota) or the filesystem simply
+# doesn't support large files. You may even need to reconfigure your kernel.
+# (This is all very operating system and site-dependent.)
#
# Perl may still be able to support large files, once you have
-# such a process and such a (file) system.
+# such a process, enough quota, and such a (file) system.
#
EOM
}
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";
+ bye();
+}
+
# Then try to deduce whether we have sparse files.
# Let's not depend on Fcntl or any other extension.
print "# @s\n";
-my $BLOCKSIZE = 512; # is this really correct everywhere?
+my $BLOCKSIZE = $s[11] || 512;
unless (@s == 13 &&
$s[7] == 1_000_003 &&
# By now we better be sure that we do have sparse files:
# if we are not, the following will hog 5 gigabytes of disk. Ooops.
+$ENV{LC_ALL} = "C";
+
open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
binmode BIG;
seek(BIG, 5_000_000_000, $SEEK_SET);
+
# Either the print or (more likely, thanks to buffering) the close will
# fail if there are are filesize limitations (process or fs).
my $print = print BIG "big";
my $close = close BIG if $print;
unless ($print && $close) {
- $ENV{LC_ALL} = "C";
- if ($! =~/File too large/) {
- print "1..0\n# writing past 2GB failed\n";
- explain();
+ unless ($print) {
+ print "# print failed: $!\n"
+ } else {
+ print "# close failed: $!\n"
+ }
+ if ($! =~/too large/i) {
+ print "1..0\n# writing past 2GB failed: process limits?\n";
+ } elsif ($! =~ /quota/i) {
+ print "1..0\n# filesystem quota limits?\n";
}
+ explain();
bye();
}
print "# @s\n";
+unless ($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