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.
7 unshift @INC, '../lib';
8 # Don't bother if there are no quad offsets.
9 require Config; import Config;
10 if ($Config{lseeksize} < 8) {
11 print "1..0\n# no 64-bit file offsets\n";
25 # If the lfs (large file support: large meaning larger than two gigabytes)
26 # tests are skipped or fail, it may mean either that your process
27 # (or process group) is not allowed to write large files (resource
28 # limits) or that the file system you are running the tests on doesn't
29 # let your user/group have large files (quota) or the filesystem simply
30 # doesn't support large files. You may even need to reconfigure your kernel.
31 # (This is all very operating system and site-dependent.)
33 # Perl may still be able to support large files, once you have
34 # such a process, enough quota, and such a (file) system.
40 if ($^O eq 'win32' || $^O eq 'vms') {
41 print "1..0\n# no sparse files\n";
45 # Known haves that have problems running this test
46 # (for example because they do not support sparse files, like UNICOS)
47 if ($^O eq 'unicos') {
48 print "1..0\n# large files known to work but unable to test them here\n";
52 # Then try to deduce whether we have sparse files.
54 # Let's not depend on Fcntl or any other extension.
56 my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
58 # We'll start off by creating a one megabyte file which has
59 # only three "true" bytes. If we have sparseness, we should
60 # consume less blocks than one megabyte (assuming nobody has
61 # one megabyte blocks...)
63 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
65 seek(BIG, 1_000_000, $SEEK_SET);
75 my $BLOCKSIZE = $s[11] || 512;
80 $BLOCKSIZE * $s[12] < 1_000_003) {
81 print "1..0\n# no sparse files?\n";
85 # By now we better be sure that we do have sparse files:
86 # if we are not, the following will hog 5 gigabytes of disk. Ooops.
90 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
92 seek(BIG, 5_000_000_000, $SEEK_SET);
94 # Either the print or (more likely, thanks to buffering) the close will
95 # fail if there are are filesize limitations (process or fs).
96 my $print = print BIG "big";
97 my $close = close BIG if $print;
98 unless ($print && $close) {
100 print "# print failed: $!\n"
102 print "# close failed: $!\n"
104 if ($! =~/too large/i) {
105 print "1..0\n# writing past 2GB failed: process limits?\n";
106 } elsif ($! =~ /quota/i) {
107 print "1..0\n# filesystem quota limits?\n";
117 unless ($s[7] == 5_000_000_003) {
118 print "1..0\n# not configured to use large files?\n";
132 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
135 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
138 fail unless -e "big";
141 fail unless -f "big";
144 open(BIG, "big") or do { warn "open failed: $!\n"; bye };
147 fail unless seek(BIG, 4_500_000_000, $SEEK_SET);
150 fail unless tell(BIG) == 4_500_000_000;
153 fail unless seek(BIG, 1, $SEEK_CUR);
156 fail unless tell(BIG) == 4_500_000_001;
159 fail unless seek(BIG, -1, $SEEK_CUR);
162 fail unless tell(BIG) == 4_500_000_000;
165 fail unless seek(BIG, -3, $SEEK_END);
168 fail unless tell(BIG) == 5_000_000_000;
173 fail unless read(BIG, $big, 3) == 3;
176 fail unless $big eq "big";
179 # 705_032_704 = (I32)5_000_000_000
180 fail unless seek(BIG, 705_032_704, $SEEK_SET);
185 fail unless read(BIG, $zero, 3) == 3;
188 fail unless $zero eq "\0\0\0";
193 bye(); # does the necessary cleanup
196 unlink "big"; # be paranoid about leaving 5 gig files lying around