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 are skipped or fail, it may mean either that your process is not
34 # allowed to write large files or that the file system you are running
35 # the tests on doesn't support large files, or both. You may also need
36 # to reconfigure your kernel. (This is all very system-dependent.)
38 # Perl may still be able to support large files, once you have
39 # such a process and such a (file) system.
45 if ($^O eq 'win32' || $^O eq 'vms') {
46 print "1..0\n# no sparse files\n";
50 # Then try to deduce whether we have sparse files.
52 # We'll start off by creating a one megabyte file which has
53 # only three "true" bytes. If we have sparseness, we should
54 # consume less blocks than one megabyte (assuming nobody has
55 # one megabyte blocks...)
57 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
58 do { warn "sysopen failed: $!\n"; bye };
59 sysseek(BIG, 1_000_000, SEEK_SET);
69 my $BLOCKSIZE = 512; # is this really correct everywhere?
74 $BLOCKSIZE * $s[12] < 1_000_003) {
75 print "1..0\n# no sparse files?\n";
79 # By now we better be sure that we do have sparse files:
80 # if we are not, the following will hog 5 gigabytes of disk. Ooops.
82 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
83 do { warn "sysopen failed: $!\n"; bye };
84 sysseek(BIG, 5_000_000_000, SEEK_SET);
85 # The syswrite will fail if there are are filesize limitations (process or fs).
86 unless(syswrite(BIG, "big") == 3) {
88 if ($! =~/File too large/) {
89 print "1..0\n# writing past 2GB failed\n";
109 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
112 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
115 fail unless -e "big";
118 fail unless -f "big";
121 sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
123 fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000;
126 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
129 fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001;
132 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
135 fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000;
138 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
141 fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000;
144 fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
149 fail unless sysread(BIG, $big, 3) == 3;
152 fail unless $big eq "big";
155 # 705_032_704 = (I32)5_000_000_000
156 fail unless seek(BIG, 705_032_704, $SEEK_SET);
161 fail unless read(BIG, $zero, 3) == 3;
164 fail unless $zero eq "\0\0\0";
169 bye(); # does the necessary cleanup