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 file offsets\n";
31 # If the lfs (large file support: large meaning larger than two gigabytes)
32 # tests are skipped or fail, it may mean either that your process
33 # (or process group) is not allowed to write large files (resource
34 # limits) or that the file system you are running the tests on doesn't
35 # let your user/group have large files (quota) or the filesystem simply
36 # doesn't support large files. You may even need to reconfigure your kernel.
37 # (This is all very operating system and site-dependent.)
39 # Perl may still be able to support large files, once you have
40 # such a process, enough quota, and such a (file) system.
46 if ($^O eq 'win32' || $^O eq 'vms') {
47 print "1..0\n# no sparse files\n";
51 # Known haves that have problems running this test
52 # (for example because they do not support sparse files, like UNICOS)
53 if ($^O eq 'unicos') {
54 print "1..0\n# large files known to work but unable to test them here\n";
58 # Then try to deduce whether we have sparse files.
60 # Let's not depend on Fcntl or any other extension.
62 my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
64 # We'll start off by creating a one megabyte file which has
65 # only three "true" bytes. If we have sparseness, we should
66 # consume less blocks than one megabyte (assuming nobody has
67 # one megabyte blocks...)
69 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
71 seek(BIG, 1_000_000, $SEEK_SET);
81 my $BLOCKSIZE = $s[11] || 512;
86 $BLOCKSIZE * $s[12] < 1_000_003) {
87 print "1..0\n# no sparse files?\n";
91 # By now we better be sure that we do have sparse files:
92 # if we are not, the following will hog 5 gigabytes of disk. Ooops.
96 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
98 seek(BIG, 5_000_000_000, $SEEK_SET);
100 # Either the print or (more likely, thanks to buffering) the close will
101 # fail if there are are filesize limitations (process or fs).
102 my $print = print BIG "big";
103 my $close = close BIG if $print;
104 unless ($print && $close) {
106 print "# print failed: $!\n"
108 print "# close failed: $!\n"
110 if ($! =~/too large/i) {
111 print "1..0\n# writing past 2GB failed: process limits?\n";
112 } elsif ($! =~ /quota/i) {
113 print "1..0\n# filesystem quota limits?\n";
123 unless ($s[7] == 5_000_000_003) {
124 print "1..0\n# not configured to use large files?\n";
138 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
141 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
144 fail unless -e "big";
147 fail unless -f "big";
150 open(BIG, "big") or do { warn "open failed: $!\n"; bye };
153 fail unless seek(BIG, 4_500_000_000, $SEEK_SET);
156 fail unless tell(BIG) == 4_500_000_000;
159 fail unless seek(BIG, 1, $SEEK_CUR);
162 fail unless tell(BIG) == 4_500_000_001;
165 fail unless seek(BIG, -1, $SEEK_CUR);
168 fail unless tell(BIG) == 4_500_000_000;
171 fail unless seek(BIG, -3, $SEEK_END);
174 fail unless tell(BIG) == 5_000_000_000;
179 fail unless read(BIG, $big, 3) == 3;
182 fail unless $big eq "big";
185 # 705_032_704 = (I32)5_000_000_000
186 fail unless seek(BIG, 705_032_704, $SEEK_SET);
191 fail unless read(BIG, $zero, 3) == 3;
194 fail unless $zero eq "\0\0\0";
199 bye(); # does the necessary cleanup
202 unlink "big"; # be paranoid about leaving 5 gig files lying around