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.
8 # Don't bother if there are no quad offsets.
9 require Config; import Config;
10 if ($Config{lseeksize} < 8) {
11 print "1..0 # Skip: no 64-bit file offsets\n";
31 # If the lfs (large file support: large meaning larger than two gigabytes)
32 # tests are skipped or fail, it may mean either that your process
33 # (or process group) is not allowed to write large files (resource
34 # limits) or that the file system you are running the tests on doesn't
35 # let your user/group have large files (quota) or the filesystem simply
36 # doesn't support large files. You may even need to reconfigure your kernel.
37 # (This is all very operating system and site-dependent.)
39 # Perl may still be able to support large files, once you have
40 # such a process, enough quota, and such a (file) system.
45 print "# checking whether we have sparse files...\n";
48 if ($^O eq 'MSWin32' || $^O eq 'VMS') {
49 print "1..0 # Skip: no sparse files in $^O\n";
53 # Known haves that have problems running this test
54 # (for example because they do not support sparse files, like UNICOS)
55 if ($^O eq 'unicos') {
56 print "1..0 # Skip: no sparse files in $^0, unable to test large files\n";
60 # Then try to heuristically deduce whether we have sparse files.
62 # Let's not depend on Fcntl or any other extension.
64 my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
66 # We'll start off by creating a one megabyte file which has
67 # only three "true" bytes. If we have sparseness, we should
68 # consume less blocks than one megabyte (assuming nobody has
69 # one megabyte blocks...)
72 do { warn "open big1 failed: $!\n"; bye };
74 do { warn "binmode big1 failed: $!\n"; bye };
75 seek(BIG, 1_000_000, $SEEK_SET) or
76 do { warn "seek big1 failed: $!\n"; bye };
78 do { warn "print big1 failed: $!\n"; bye };
80 do { warn "close big1 failed: $!\n"; bye };
82 my @s1 = stat("big1");
87 do { warn "open big2 failed: $!\n"; bye };
89 do { warn "binmode big2 failed: $!\n"; bye };
90 seek(BIG, 2_000_000, $SEEK_SET) or
91 do { warn "seek big2 failed; $!\n"; bye };
93 do { warn "print big2 failed; $!\n"; bye };
95 do { warn "close big2 failed; $!\n"; bye };
97 my @s2 = stat("big2");
103 unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 &&
104 $s1[11] == $s2[11] && $s1[12] == $s2[12]) {
105 print "1..0 # Skip: no sparse files?\n";
109 print "# we seem to have sparse files...\n";
111 # By now we better be sure that we do have sparse files:
112 # if we are not, the following will hog 5 gigabytes of disk. Ooops.
113 # This may fail by producing some signal; run in a subprocess first for safety
117 my $r = system '../perl', '-e', <<'EOF';
119 seek(BIG, 5_000_000_000, 0);
124 open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
126 if ($r or not seek(BIG, 5_000_000_000, $SEEK_SET)) {
127 my $err = $r ? 'signal '.($r & 0x7f) : $!;
128 print "1..0 # Skip: seeking past 2GB failed: $err\n";
133 # Either the print or (more likely, thanks to buffering) the close will
134 # fail if there are are filesize limitations (process or fs).
135 my $print = print BIG "big";
136 print "# print failed: $!\n" unless $print;
137 my $close = close BIG;
138 print "# close failed: $!\n" unless $close;
139 unless ($print && $close) {
140 if ($! =~/too large/i) {
141 print "1..0 # Skip: writing past 2GB failed: process limits?\n";
142 } elsif ($! =~ /quota/i) {
143 print "1..0 # Skip: filesystem quota limits?\n";
153 unless ($s[7] == 5_000_000_003) {
154 print "1..0 # Skip: not configured to use large files?\n";
168 fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
171 fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
174 fail unless -e "big";
177 fail unless -f "big";
180 open(BIG, "big") or do { warn "open failed: $!\n"; bye };
183 fail unless seek(BIG, 4_500_000_000, $SEEK_SET);
186 fail unless tell(BIG) == 4_500_000_000;
189 fail unless seek(BIG, 1, $SEEK_CUR);
192 fail unless tell(BIG) == 4_500_000_001;
195 fail unless seek(BIG, -1, $SEEK_CUR);
198 fail unless tell(BIG) == 4_500_000_000;
201 fail unless seek(BIG, -3, $SEEK_END);
204 fail unless tell(BIG) == 5_000_000_000;
209 fail unless read(BIG, $big, 3) == 3;
212 fail unless $big eq "big";
215 # 705_032_704 = (I32)5_000_000_000
216 fail unless seek(BIG, 705_032_704, $SEEK_SET);
221 fail unless read(BIG, $zero, 3) == 3;
224 fail unless $zero eq "\0\0\0";
229 bye(); # does the necessary cleanup
232 unlink "big"; # be paranoid about leaving 5 gig files lying around