+# NOTE: this file tests how large files (>2GB) work with perlio (stdio/sfio).
+# sysopen(), sysseek(), syswrite(), sysread() are tested in t/lib/syslfs.t.
+# If you modify/add tests here, remember to update also t/lib/syslfs.t.
+
BEGIN {
- eval { pack "q", 0 };
+ # Don't bother if there are no quads.
+ eval { my $q = pack "q", 0 };
if ($@) {
print "1..0\n# no 64-bit types\n";
exit(0);
}
+ chdir 't' if -d 't';
+ unshift @INC, '../lib';
+ # Don't bother if there are no quad offsets.
+ require Config; import Config;
+ if ($Config{lseeksize} < 8) {
+ print "1..0\n# no 64-bit file offsets\n";
+ exit(0);
+ }
}
-# First try to figure out whether we have sparse files.
+sub bye {
+ close(BIG);
+ unlink "big";
+ exit(0);
+}
+sub explain {
+ print <<EOM;
+#
+# If the lfs (large file support: large meaning larger than two gigabytes)
+# tests are skipped or fail, it may mean either that your process is not
+# allowed to write large files or that the file system you are running
+# the tests on doesn't support large files, or both. You may also need
+# to reconfigure your kernel. (This is all very system-dependent.)
+#
+# Perl may still be able to support large files, once you have
+# such a process and such a (file) system.
+#
+EOM
+}
+
+# Known have-nots.
if ($^O eq 'win32' || $^O eq 'vms') {
print "1..0\n# no sparse files\n";
- exit(0);
+ bye();
}
-open(BIG, ">big");
+# Then try to deduce whether we have sparse files.
+
+# Let's not depend on Fcntl or any other extension.
+
+my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
+
+# We'll start off by creating a one megabyte file which has
+# only three "true" bytes. If we have sparseness, we should
+# consume less blocks than one megabyte (assuming nobody has
+# one megabyte blocks...)
+
+open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
+binmode BIG;
+seek(BIG, 1_000_000, $SEEK_SET);
+print BIG "big";
close(BIG);
my @s;
@s = stat("big");
-unless (@s == 13 && defined $s[11] && defined $s[12]) {
- print "1..0\n# no sparse files\n";
- exit(0);
+print "# @s\n";
+
+my $BLOCKSIZE = 512; # is this really correct everywhere?
+
+unless (@s == 13 &&
+ $s[7] == 1_000_003 &&
+ defined $s[12] &&
+ $BLOCKSIZE * $s[12] < 1_000_003) {
+ print "1..0\n# no sparse files?\n";
+ bye();
}
# By now we better be sure that we do have sparse files:
# if we are not, the following will hog 5 gigabytes of disk. Ooops.
-print "1..8\n";
-
-open(BIG, ">big");
+open(BIG, ">big") or do { warn "open failed: $!\n"; bye };
binmode BIG;
-seek(BIG, 5_000_000_000, 0);
-print BIG "big";
-close BIG;
+seek(BIG, 5_000_000_000, $SEEK_SET);
+# Either the print or (more likely, thanks to buffering) the close will
+# fail if there are are filesize limitations (process or fs).
+my $print = print BIG "big";
+my $close = close BIG if $print;
+unless ($print && $close) {
+ $ENV{LC_ALL} = "C";
+ if ($! =~/File too large/) {
+ print "1..0\n# writing past 2GB failed\n";
+ explain();
+ }
+ bye();
+}
@s = stat("big");
-print "not " unless $s[7] == 5_000_000_003;
+print "# @s\n";
+
+sub fail () {
+ print "not ";
+ $fail++;
+}
+
+print "1..17\n";
+
+my $fail = 0;
+
+fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
print "ok 1\n";
-print "not " unless -s "big" == 5_000_000_003;
+fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
print "ok 2\n";
-open(BIG, "big");
+fail unless -e "big";
+print "ok 3\n";
+
+fail unless -f "big";
+print "ok 4\n";
+
+open(BIG, "big") or do { warn "open failed: $!\n"; bye };
binmode BIG;
-seek(BIG, 4_500_000_000, 0);
+fail unless seek(BIG, 4_500_000_000, $SEEK_SET);
+print "ok 5\n";
-print "not " unless tell(BIG) == 4_500_000_000;
-print "ok 3\n";
+fail unless tell(BIG) == 4_500_000_000;
+print "ok 6\n";
-seek(BIG, 1, 1);
+fail unless seek(BIG, 1, $SEEK_CUR);
+print "ok 7\n";
-print "not " unless tell(BIG) == 4_500_000_001;
-print "ok 4\n";
+fail unless tell(BIG) == 4_500_000_001;
+print "ok 8\n";
-seek(BIG, -1, 1);
+fail unless seek(BIG, -1, $SEEK_CUR);
+print "ok 9\n";
-print "not " unless tell(BIG) == 4_500_000_000;
-print "ok 5\n";
+fail unless tell(BIG) == 4_500_000_000;
+print "ok 10\n";
-seek(BIG, -3, 2);
+fail unless seek(BIG, -3, $SEEK_END);
+print "ok 11\n";
-print "not " unless tell(BIG) == 5_000_000_000;
-print "ok 6\n";
+fail unless tell(BIG) == 5_000_000_000;
+print "ok 12\n";
my $big;
-print "not " unless read(BIG, $big, 3) == 3;
-print "ok 7\n";
+fail unless read(BIG, $big, 3) == 3;
+print "ok 13\n";
-print "not " unless $big eq "big";
-print "ok 8\n";
+fail unless $big eq "big";
+print "ok 14\n";
-close(BIG);
+# 705_032_704 = (I32)5_000_000_000
+fail unless seek(BIG, 705_032_704, $SEEK_SET);
+print "ok 15\n";
+
+my $zero;
+
+fail unless read(BIG, $zero, 3) == 3;
+print "ok 16\n";
+
+fail unless $zero eq "\0\0\0";
+print "ok 17\n";
-# Testing sysseek() and other sys*() io would be nice but for
-# the tests to be be portable they require the SEEK_* constants.
+explain if $fail;
-unlink "big";
+bye(); # does the necessary cleanup
+# eof
projects / p5sagit/p5-mst-13.2.git / blobdiff