1 # NOTE: this file tests how large files (>2GB) work with perlio (stdio/sfio).
2 # sysopen(), sysseek(), syswrite(), sysread() are tested in t/lib/syslfs.t.
3 # If you modify/add tests here, remember to update also t/lib/syslfs.t.
6 # Don't bother if there are no quads.
7 eval { my $q = pack "q", 0 };
9 print "1..0\n# no 64-bit types\n";
13 unshift @INC, '../lib';
14 # Don't bother if there are no quad offsets.
15 require Config; import Config;
16 if ($Config{lseeksize} < 8) {
17 print "1..0\n# no 64-bit file offsets\n";
29 if ($^O eq 'win32' || $^O eq 'vms') {
30 print "1..0\n# no sparse files\n";
34 # Then try to deduce whether we have sparse files.
36 # Let's not depend on Fcntl or any other extension.
38 my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
40 # We'll start off by creating a one megabyte file which has
41 # only three "true" bytes. If we have sparseness, we should
42 # consume less blocks than one megabyte (assuming nobody has
43 # one megabyte blocks...)
45 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
47 seek(BIG, 1_000_000, $SEEK_SET);
57 my $BLOCKSIZE = 512; # is this really correct everywhere?
62 $BLOCKSIZE * $s[12] < 1_000_003) {
63 print "1..0\n# no sparse files?\n";
67 # By now we better be sure that we do have sparse files:
68 # if we are not, the following will hog 5 gigabytes of disk. Ooops.
74 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
76 seek(BIG, 5_000_000_000, $SEEK_SET);
89 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
92 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
95 open(BIG, "big") or do { warn "open failed: $!\n"; bye };
98 seek(BIG, 4_500_000_000, $SEEK_SET);
100 fail unless tell(BIG) == 4_500_000_000;
103 seek(BIG, 1, $SEEK_CUR);
105 fail unless tell(BIG) == 4_500_000_001;
108 seek(BIG, -1, $SEEK_CUR);
110 fail unless tell(BIG) == 4_500_000_000;
113 seek(BIG, -3, $SEEK_END);
115 fail unless tell(BIG) == 5_000_000_000;
120 fail unless read(BIG, $big, 3) == 3;
123 fail unless $big eq "big";
129 # If the lfs (large file support) tests fail, it may mean that
130 # the *file system* you are running the tests on doesn't support
131 # large files (files larger than two gigabytes). Perl may still
132 # be able to support such files, once you have such a file system.