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 offsets\n";
29 if ($^O eq 'win32' || $^O eq 'vms') {
30 print "1..0\n# no sparse files\n";
34 # Then try to deduce whether we have sparse files.
36 my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
38 # We'll start off by creating a one megabyte file which has
39 # only three "true" bytes. If we have sparseness, we should
40 # consume less blocks than one megabyte (assuming nobody has
41 # one megabyte blocks...)
43 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
45 seek(BIG, 1_000_000, $SEEK_SET);
59 $s[11] * $s[12] < 1000_003) {
60 print "1..0\n# no sparse files?\n";
64 # By now we better be sure that we do have sparse files:
65 # if we are not, the following will hog 5 gigabytes of disk. Ooops.
71 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
73 seek(BIG, 5_000_000_000, $SEEK_SET);
86 fail unless $s[7] == 5_000_000_003;
89 fail unless -s "big" == 5_000_000_003;
92 open(BIG, "big") or do { warn "open failed: $!\n"; bye };
95 seek(BIG, 4_500_000_000, $SEEK_SET);
97 fail unless tell(BIG) == 4_500_000_000;
100 seek(BIG, 1, $SEEK_CUR);
102 fail unless tell(BIG) == 4_500_000_001;
105 seek(BIG, -1, $SEEK_CUR);
107 fail unless tell(BIG) == 4_500_000_000;
110 seek(BIG, -3, $SEEK_END);
112 fail unless tell(BIG) == 5_000_000_000;
117 fail unless read(BIG, $big, 3) == 3;
120 fail unless $big eq "big";
128 # If the lfs (large file support) tests fail, it means that
129 # the *file system* you are running the tests on doesn't support
130 # large files (files larger than two gigabytes). Perl may still
131 # be able to support such files, once you have such a file system.