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Diffstat (limited to 'contrib/perl5/t/op/lfs.t')
| -rwxr-xr-x | contrib/perl5/t/op/lfs.t | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/contrib/perl5/t/op/lfs.t b/contrib/perl5/t/op/lfs.t new file mode 100755 index 000000000000..e704f6f57b6e --- /dev/null +++ b/contrib/perl5/t/op/lfs.t @@ -0,0 +1,226 @@ +# NOTE: this file tests how large files (>2GB) work with perlio (stdio/sfio). +# sysopen(), sysseek(), syswrite(), sysread() are tested in t/lib/syslfs.t. +# If you modify/add tests here, remember to update also t/lib/syslfs.t. + +BEGIN { + chdir 't' if -d 't'; + unshift @INC, '../lib'; + # Don't bother if there are no quad offsets. + require Config; import Config; + if ($Config{lseeksize} < 8) { + print "1..0\n# no 64-bit file offsets\n"; + exit(0); + } +} + +sub zap { + close(BIG); + unlink("big"); + unlink("big1"); + unlink("big2"); +} + +sub bye { + zap(); + exit(0); +} + +sub explain { + print <<EOM; +# +# If the lfs (large file support: large meaning larger than two gigabytes) +# tests are skipped or fail, it may mean either that your process +# (or process group) is not allowed to write large files (resource +# limits) or that the file system you are running the tests on doesn't +# let your user/group have large files (quota) or the filesystem simply +# doesn't support large files. You may even need to reconfigure your kernel. +# (This is all very operating system and site-dependent.) +# +# Perl may still be able to support large files, once you have +# such a process, enough quota, and such a (file) system. +# +EOM +} + +print "# checking whether we have sparse files...\n"; + +# Known have-nots. +if ($^O eq 'win32' || $^O eq 'vms') { + print "1..0\n# no sparse files (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 ($^O)\n"; + bye(); +} + +# Then try to heuristically deduce whether we have sparse files. + +# Let's not depend on Fcntl or any other extension. + +my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2); + +# 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...) + +open(BIG, ">big1") or + do { warn "open big1 failed: $!\n"; bye }; +binmode(BIG) or + do { warn "binmode big1 failed: $!\n"; bye }; +seek(BIG, 1_000_000, $SEEK_SET) or + do { warn "seek big1 failed: $!\n"; bye }; +print BIG "big" or + do { warn "print big1 failed: $!\n"; bye }; +close(BIG) or + do { warn "close big1 failed: $!\n"; bye }; + +my @s1 = stat("big1"); + +print "# s1 = @s1\n"; + +open(BIG, ">big2") or + do { warn "open big2 failed: $!\n"; bye }; +binmode(BIG) or + do { warn "binmode big2 failed: $!\n"; bye }; +seek(BIG, 2_000_000, $SEEK_SET) or + do { warn "seek big2 failed; $!\n"; bye }; +print BIG "big" or + do { warn "print big2 failed; $!\n"; bye }; +close(BIG) or + do { warn "close big2 failed; $!\n"; bye }; + +my @s2 = stat("big2"); + +print "# s2 = @s2\n"; + +zap(); + +unless ($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"; + +open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; +binmode BIG; +unless (seek(BIG, 5_000_000_000, $SEEK_SET)) { + print "1..0\n# seeking past 2GB failed: $!\n"; + explain(); + bye(); +} + +# 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"; +print "# print failed: $!\n" unless $print; +my $close = close BIG; +print "# close failed: $!\n" unless $close; +unless ($print && $close) { + if ($! =~/too large/i) { + print "1..0\n# writing past 2GB failed: process limits?\n"; + } elsif ($! =~ /quota/i) { + print "1..0\n# filesystem quota limits?\n"; + } + explain(); + bye(); +} + +@s = stat("big"); + +print "# @s\n"; + +unless ($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 "1..17\n"; + +my $fail = 0; + +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"; + +fail unless -e "big"; +print "ok 3\n"; + +fail unless -f "big"; +print "ok 4\n"; + +open(BIG, "big") or do { warn "open failed: $!\n"; bye }; +binmode BIG; + +fail unless seek(BIG, 4_500_000_000, $SEEK_SET); +print "ok 5\n"; + +fail unless tell(BIG) == 4_500_000_000; +print "ok 6\n"; + +fail unless seek(BIG, 1, $SEEK_CUR); +print "ok 7\n"; + +fail unless tell(BIG) == 4_500_000_001; +print "ok 8\n"; + +fail unless seek(BIG, -1, $SEEK_CUR); +print "ok 9\n"; + +fail unless tell(BIG) == 4_500_000_000; +print "ok 10\n"; + +fail unless seek(BIG, -3, $SEEK_END); +print "ok 11\n"; + +fail unless tell(BIG) == 5_000_000_000; +print "ok 12\n"; + +my $big; + +fail unless read(BIG, $big, 3) == 3; +print "ok 13\n"; + +fail unless $big eq "big"; +print "ok 14\n"; + +# 705_032_704 = (I32)5_000_000_000 +fail unless seek(BIG, 705_032_704, $SEEK_SET); +print "ok 15\n"; + +my $zero; + +fail unless read(BIG, $zero, 3) == 3; +print "ok 16\n"; + +fail unless $zero eq "\0\0\0"; +print "ok 17\n"; + +explain if $fail; + +bye(); # does the necessary cleanup + +END { + unlink "big"; # be paranoid about leaving 5 gig files lying around +} + +# eof |