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Diffstat (limited to 'contrib/perl5/t/lib/syslfs.t')
| -rwxr-xr-x | contrib/perl5/t/lib/syslfs.t | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/contrib/perl5/t/lib/syslfs.t b/contrib/perl5/t/lib/syslfs.t new file mode 100755 index 000000000000..28571209428f --- /dev/null +++ b/contrib/perl5/t/lib/syslfs.t @@ -0,0 +1,221 @@ +# NOTE: this file tests how large files (>2GB) work with raw system IO. +# 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 { + chdir 't' if -d 't'; + unshift @INC, '../lib'; + require Config; import Config; + # Don't bother if there are no quad offsets. + if ($Config{lseeksize} < 8) { + print "1..0\n# no 64-bit file offsets\n"; + exit(0); + } + require Fcntl; import Fcntl qw(/^O_/ /^SEEK_/); +} + +sub zap { + close(BIG); + unlink("big"); + unlink("big1"); + unlink("big2"); +} + +sub bye { + zap(); + exit(0); +} + +sub explain { + print <<EOM; +# +# If the lfs (large file support: large meaning larger than two gigabytes) +# tests are skipped or fail, it may mean either that your process +# (or process group) is not allowed to write large files (resource +# limits) or that the file system you are running the tests on doesn't +# let your user/group have large files (quota) or the filesystem simply +# doesn't support large files. You may even need to reconfigure your kernel. +# (This is all very operating system and site-dependent.) +# +# Perl may still be able to support large files, once you have +# such a process, enough quota, and such a (file) system. +# +EOM +} + +print "# checking whether we have sparse files...\n"; + +# Known have-nots. +if ($^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 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, "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 @s1 = stat("big1"); + +print "# s1 = @s1\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: $!\n"; bye }; + +my @s2 = stat("big2"); + +print "# s2 = @s2\n"; + +zap(); + +unless ($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"; + +sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or + 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"); +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 && $close) { + if ($! =~/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"; + +sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye }; + +fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000; +print "ok 5\n"; + +fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; +print "ok 6\n"; + +fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001; +print "ok 7\n"; + +fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001; +print "ok 8\n"; + +fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000; +print "ok 9\n"; + +fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; +print "ok 10\n"; + +fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000; +print "ok 11\n"; + +fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000; +print "ok 12\n"; + +my $big; + +fail unless sysread(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 |