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;
32 # If the lfs (large file support: large meaning larger than two gigabytes)
33 # tests fail, it may mean either that your process is not allowed to write
34 # large files or that the file system you are running the tests on doesn't
35 # support large files, or both.
37 # Perl may still be able to support large files, once you have
38 # such a process and such a file system.
44 if ($^O eq 'win32' || $^O eq 'vms') {
45 print "1..0\n# no sparse files\n";
49 # Then try to deduce whether we have sparse files.
51 # We'll start off by creating a one megabyte file which has
52 # only three "true" bytes. If we have sparseness, we should
53 # consume less blocks than one megabyte (assuming nobody has
54 # one megabyte blocks...)
56 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
57 do { warn "sysopen failed: $!\n"; bye };
58 sysseek(BIG, 1_000_000, SEEK_SET);
68 my $BLOCKSIZE = 512; # is this really correct everywhere?
73 $BLOCKSIZE * $s[12] < 1_000_003) {
74 print "1..0\n# no sparse files?\n";
78 # By now we better be sure that we do have sparse files:
79 # if we are not, the following will hog 5 gigabytes of disk. Ooops.
81 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
82 do { warn "sysopen failed: $!\n"; bye };
83 sysseek(BIG, 5_000_000_000, SEEK_SET);
84 # The syswrite will fail if there are are filesize limitations (process or fs).
85 unless(syswrite(BIG, "big") == 3) {
87 if ($! =~/File too large/) {
88 print "1..0\n# writing past 2GB failed\n";
108 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
111 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
114 sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
116 sysseek(BIG, 4_500_000_000, SEEK_SET);
118 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
121 sysseek(BIG, 1, SEEK_CUR);
123 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
126 sysseek(BIG, -1, SEEK_CUR);
128 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
131 sysseek(BIG, -3, SEEK_END);
133 fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
138 fail unless sysread(BIG, $big, 3) == 3;
141 fail unless $big eq "big";