1 # NOTE: this file tests how large files (>2GB) work with raw system IO.
2 # open(), tell(), seek(), print(), read() are tested in t/op/lfs.t.
3 # If you modify/add tests here, remember to update also t/op/lfs.t.
6 # Don't bother if there are no quads.
7 eval { my $q = pack "q", 0 };
9 print "1..0\n# no 64-bit types\n";
13 unshift @INC, '../lib';
14 require Config; import Config;
15 # Don't bother if there are no quad offsets.
16 if ($Config{lseeksize} < 8) {
17 print "1..0\n# no 64-bit file offsets\n";
20 require Fcntl; import Fcntl;
30 if ($^O eq 'win32' || $^O eq 'vms') {
31 print "1..0\n# no sparse files\n";
35 # Then try to deduce whether we have sparse files.
37 # We'll start off by creating a one megabyte file which has
38 # only three "true" bytes. If we have sparseness, we should
39 # consume less blocks than one megabyte (assuming nobody has
40 # one megabyte blocks...)
42 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
43 do { warn "sysopen failed: $!\n"; bye };
44 sysseek(BIG, 1_000_000, SEEK_SET);
54 my $BLOCKSIZE = 512; # is this really correct everywhere?
59 $BLOCKSIZE * $s[12] < 1_000_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 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
72 do { warn "sysopen failed: $!\n"; bye };
73 sysseek(BIG, 5_000_000_000, SEEK_SET);
86 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
89 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
92 sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
94 sysseek(BIG, 4_500_000_000, SEEK_SET);
96 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
99 sysseek(BIG, 1, SEEK_CUR);
101 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
104 sysseek(BIG, -1, SEEK_CUR);
106 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
109 sysseek(BIG, -3, SEEK_END);
111 fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
116 fail unless sysread(BIG, $big, 3) == 3;
119 fail unless $big eq "big";
125 # If the lfs (large file support) tests fail, it may mean that
126 # the *file system* you are running the tests on doesn't support
127 # large files (files larger than two gigabytes). Perl may still
128 # be able to support such files, once you have such a file system.