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
34 # (or process group) is not allowed to write large files (resource
35 # limits) or that the file system you are running the tests on doesn't
36 # let your user/group have large files (quota) or the filesystem simply
37 # doesn't support large files. You may even need to reconfigure your kernel.
38 # (This is all very operating system and site-dependent.)
40 # Perl may still be able to support large files, once you have
41 # such a process, enough quota, and such a (file) system.
47 if ($^O eq 'win32' || $^O eq 'vms') {
48 print "1..0\n# no sparse files\n";
52 # Known haves that have problems running this test
53 # (for example because they do not support sparse files, like UNICOS)
54 if ($^O eq 'unicos') {
55 print "1..0\n# large files known to work but unable to test them here\n";
59 # Then try to deduce whether we have sparse files.
61 # We'll start off by creating a one megabyte file which has
62 # only three "true" bytes. If we have sparseness, we should
63 # consume less blocks than one megabyte (assuming nobody has
64 # one megabyte blocks...)
66 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
67 do { warn "sysopen failed: $!\n"; bye };
68 sysseek(BIG, 1_000_000, SEEK_SET);
78 my $BLOCKSIZE = $s[11] || 512;
83 $BLOCKSIZE * $s[12] < 1_000_003) {
84 print "1..0\n# no sparse files?\n";
88 # By now we better be sure that we do have sparse files:
89 # if we are not, the following will hog 5 gigabytes of disk. Ooops.
93 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
94 do { warn "sysopen failed: $!\n"; bye };
95 sysseek(BIG, 5_000_000_000, SEEK_SET);
97 # The syswrite will fail if there are are filesize limitations (process or fs).
98 my $syswrite = syswrite(BIG, "big") == 3;
99 my $close = close BIG if $syswrite;
100 unless($syswrite && $close) {
102 print "# syswrite failed: $!\n"
104 print "# close failed: $!\n"
106 if ($! =~/too large/i) {
107 print "1..0\n# writing past 2GB failed: process limits?\n";
108 } elsif ($! =~ /quota/i) {
109 print "1..0\n# filesystem quota limits?\n";
119 unless ($s[7] == 5_000_000_003) {
120 print "1..0\n# not configured to use large files?\n";
134 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
137 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
140 fail unless -e "big";
143 fail unless -f "big";
146 sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
148 fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000;
151 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
154 fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001;
157 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
160 fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000;
163 fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
166 fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000;
169 fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
174 fail unless sysread(BIG, $big, 3) == 3;
177 fail unless $big eq "big";
180 # 705_032_704 = (I32)5_000_000_000
181 fail unless seek(BIG, 705_032_704, $SEEK_SET);
186 fail unless read(BIG, $zero, 3) == 3;
189 fail unless $zero eq "\0\0\0";
194 bye(); # does the necessary cleanup
197 unlink "big"; # be paranoid about leaving 5 gig files lying around