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' || $^O eq 'vms') {
47 print "1..0\n# no sparse files\n";
51 # Then try to deduce whether we have sparse files.
53 # Let's not depend on Fcntl or any other extension.
55 my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
57 # We'll start off by creating a one megabyte file which has
58 # only three "true" bytes. If we have sparseness, we should
59 # consume less blocks than one megabyte (assuming nobody has
60 # one megabyte blocks...)
62 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
64 seek(BIG, 1_000_000, $SEEK_SET);
74 # Is there a portable way to find out what's the unit of st_blocks?
78 $BLOCKSIZE = 4096 if $^O eq 'unicos';
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 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
95 seek(BIG, 5_000_000_000, $SEEK_SET);
97 # Either the print or (more likely, thanks to buffering) the close will
98 # fail if there are are filesize limitations (process or fs).
99 my $print = print BIG "big";
100 my $close = close BIG if $print;
101 unless ($print && $close) {
103 print "# print failed: $!\n"
105 print "# close failed: $!\n"
107 if ($! =~/too large/i) {
108 print "1..0\n# writing past 2GB failed: process limits?\n";
109 } elsif ($! =~ /quota/i) {
110 print "1..0\n# filesystem quota limits?\n";
129 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
132 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
135 fail unless -e "big";
138 fail unless -f "big";
141 open(BIG, "big") or do { warn "open failed: $!\n"; bye };
144 fail unless seek(BIG, 4_500_000_000, $SEEK_SET);
147 fail unless tell(BIG) == 4_500_000_000;
150 fail unless seek(BIG, 1, $SEEK_CUR);
153 fail unless tell(BIG) == 4_500_000_001;
156 fail unless seek(BIG, -1, $SEEK_CUR);
159 fail unless tell(BIG) == 4_500_000_000;
162 fail unless seek(BIG, -3, $SEEK_END);
165 fail unless tell(BIG) == 5_000_000_000;
170 fail unless read(BIG, $big, 3) == 3;
173 fail unless $big eq "big";
176 # 705_032_704 = (I32)5_000_000_000
177 fail unless seek(BIG, 705_032_704, $SEEK_SET);
182 fail unless read(BIG, $zero, 3) == 3;
185 fail unless $zero eq "\0\0\0";
190 bye(); # does the necessary cleanup