# NOTE: this file tests how large files (>2GB) work with raw system IO.
-# open(), tell(), seek(), print(), read() are tested in t/op/lfs.t.
+# stdio: open(), tell(), seek(), print(), read() is tested in t/op/lfs.t.
# If you modify/add tests here, remember to update also t/op/lfs.t.
BEGIN {
- # 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';
+ @INC = '../lib';
require Config; import Config;
# Don't bother if there are no quad offsets.
if ($Config{lseeksize} < 8) {
- print "1..0\n# no 64-bit file offsets\n";
+ print "1..0 # Skip: no 64-bit file offsets\n";
exit(0);
}
- require Fcntl; import Fcntl;
+ require Fcntl; import Fcntl qw(/^O_/ /^SEEK_/);
}
-sub bye {
+use strict;
+
+our @s;
+our $fail;
+
+sub zap {
close(BIG);
- unlink "big";
+ unlink("big");
+ unlink("big1");
+ unlink("big2");
+}
+
+sub bye {
+ zap();
exit(0);
}
+my $explained;
+
sub explain {
- print <<EOM;
+ unless ($explained++) {
+ 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
-# (or process group) is not allowed to write large files (resource
-# limits) or that the file system you are running the tests on doesn't
-# let your user/group have large files (quota) or the filesystem simply
-# doesn't support large files. You may even need to reconfigure your kernel.
-# (This is all very operating system and site-dependent.)
+# If the lfs (large file support: large meaning larger than two
+# gigabytes) tests are skipped or fail, it may mean either that your
+# process (or process group) is not allowed to write large files
+# (resource limits) or that the file system (the network filesystem?)
+# you are running the tests on doesn't let your user/group have large
+# files (quota) or the filesystem simply doesn't support large files.
+# You may even need to reconfigure your kernel. (This is all very
+# operating system and site-dependent.)
#
# Perl may still be able to support large files, once you have
# such a process, enough quota, and such a (file) system.
+# It is just that the test failed now.
#
EOM
+ }
+ print "1..0 # Skip: @_\n" if @_;
}
+print "# checking whether we have sparse files...\n";
+
# Known have-nots.
-if ($^O eq 'win32' || $^O eq 'vms') {
- print "1..0\n# no sparse files\n";
+if ($^O eq 'MSWin32' || $^O eq 'VMS') {
+ print "1..0 # Skip: no sparse files in $^O\n";
bye();
}
# Known haves that have problems running this test
# (for example because they do not support sparse files, like UNICOS)
if ($^O eq 'unicos') {
- print "1..0\n# large files known to work but unable to test them here\n";
+ print "1..0 # Skip: no sparse files in $^0, unable to test large files\n";
bye();
}
-# Then try to deduce whether we have sparse files.
+# Then try heuristically to deduce whether we have sparse files.
# 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...)
-sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
- do { warn "sysopen failed: $!\n"; bye };
-sysseek(BIG, 1_000_000, SEEK_SET);
-syswrite(BIG, "big");
-close(BIG);
+sysopen(BIG, "big1", O_WRONLY|O_CREAT|O_TRUNC) or
+ do { warn "sysopen big1 failed: $!\n"; bye };
+sysseek(BIG, 1_000_000, SEEK_SET) or
+ do { warn "sysseek big1 failed: $!\n"; bye };
+syswrite(BIG, "big") or
+ do { warn "syswrite big1 failed; $!\n"; bye };
+close(BIG) or
+ do { warn "close big1 failed: $!\n"; bye };
-my @s;
+my @s1 = stat("big1");
-@s = stat("big");
+print "# s1 = @s1\n";
-print "# @s\n";
+sysopen(BIG, "big2", O_WRONLY|O_CREAT|O_TRUNC) or
+ do { warn "sysopen big2 failed: $!\n"; bye };
+sysseek(BIG, 2_000_000, SEEK_SET) or
+ do { warn "sysseek big2 failed: $!\n"; bye };
+syswrite(BIG, "big") or
+ do { warn "syswrite big2 failed; $!\n"; bye };
+close(BIG) or
+ do { warn "close big2 failed: $!\n"; bye };
-my $BLOCKSIZE = $s[11] || 512;
+my @s2 = stat("big2");
-unless (@s == 13 &&
- $s[7] == 1_000_003 &&
- defined $s[12] &&
- $BLOCKSIZE * $s[12] < 1_000_003) {
- print "1..0\n# no sparse files?\n";
- bye();
+print "# s2 = @s2\n";
+
+zap();
+
+unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 &&
+ $s1[11] == $s2[11] && $s1[12] == $s2[12]) {
+ print "1..0 # Skip: no sparse files?\n";
+ bye;
}
+print "# we seem to have sparse files...\n";
+
# 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.
+# This may fail by producing some signal; run in a subprocess first for safety
$ENV{LC_ALL} = "C";
+my $r = system '../perl', '-I../lib', '-e', <<'EOF';
+use Fcntl qw(/^O_/ /^SEEK_/);
+sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or die $!;
+my $sysseek = sysseek(BIG, 5_000_000_000, SEEK_SET);
+my $syswrite = syswrite(BIG, "big");
+exit 0;
+EOF
+
sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
- do { warn "sysopen failed: $!\n"; bye };
-sysseek(BIG, 5_000_000_000, SEEK_SET);
+ do { warn "sysopen 'big' failed: $!\n"; bye };
+my $sysseek = sysseek(BIG, 5_000_000_000, SEEK_SET);
+unless (! $r && defined $sysseek && $sysseek == 5_000_000_000) {
+ $sysseek = 'undef' unless defined $sysseek;
+ explain("seeking past 2GB failed: ",
+ $r ? 'signal '.($r & 0x7f) : "$! (sysseek returned $sysseek)");
+ bye();
+}
# The syswrite will fail if there are are filesize limitations (process or fs).
-my $syswrite = syswrite(BIG, "big") == 3;
-my $close = close BIG if $syswrite;
+my $syswrite = syswrite(BIG, "big");
+print "# syswrite failed: $! (syswrite returned ",
+ defined $syswrite ? $syswrite : 'undef', ")\n"
+ unless defined $syswrite && $syswrite == 3;
+my $close = close BIG;
+print "# close failed: $!\n" unless $close;
unless($syswrite && $close) {
- unless ($syswrite) {
- print "# syswrite failed: $!\n"
- } else {
- print "# close failed: $!\n"
- }
if ($! =~/too large/i) {
- print "1..0\n# writing past 2GB failed: process limits?\n";
+ explain("writing past 2GB failed: process limits?");
} elsif ($! =~ /quota/i) {
- print "1..0\n# filesystem quota limits?\n";
+ explain("filesystem quota limits?");
+ } else {
+ explain("error: $!");
}
- explain();
bye();
}
print "# @s\n";
+unless ($s[7] == 5_000_000_003) {
+ explain("kernel/fs not configured to use large files?");
+ bye();
+}
+
sub fail () {
print "not ";
$fail++;
}
+sub offset ($$) {
+ my ($offset_will_be, $offset_want) = @_;
+ my $offset_is = eval $offset_will_be;
+ unless ($offset_is == $offset_want) {
+ print "# bad offset $offset_is, want $offset_want\n";
+ my ($offset_func) = ($offset_will_be =~ /^(\w+)/);
+ if (unpack("L", pack("L", $offset_want)) == $offset_is) {
+ print "# 32-bit wraparound suspected in $offset_func() since\n";
+ print "# $offset_want cast into 32 bits equals $offset_is.\n";
+ } elsif ($offset_want - unpack("L", pack("L", $offset_want)) - 1
+ == $offset_is) {
+ print "# 32-bit wraparound suspected in $offset_func() since\n";
+ printf "# %s - unpack('L', pack('L', %s)) - 1 equals %s.\n",
+ $offset_want,
+ $offset_want,
+ $offset_is;
+ }
+ fail;
+ }
+}
+
print "1..17\n";
-my $fail = 0;
+$fail = 0;
fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
print "ok 1\n";
sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
-fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000;
+offset('sysseek(BIG, 4_500_000_000, SEEK_SET)', 4_500_000_000);
print "ok 5\n";
-fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
+offset('sysseek(BIG, 0, SEEK_CUR)', 4_500_000_000);
print "ok 6\n";
-fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001;
+offset('sysseek(BIG, 1, SEEK_CUR)', 4_500_000_001);
print "ok 7\n";
-fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
+offset('sysseek(BIG, 0, SEEK_CUR)', 4_500_000_001);
print "ok 8\n";
-fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000;
+offset('sysseek(BIG, -1, SEEK_CUR)', 4_500_000_000);
print "ok 9\n";
-fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
+offset('sysseek(BIG, 0, SEEK_CUR)', 4_500_000_000);
print "ok 10\n";
-fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000;
+offset('sysseek(BIG, -3, SEEK_END)', 5_000_000_000);
print "ok 11\n";
-fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
+offset('sysseek(BIG, 0, SEEK_CUR)', 5_000_000_000);
print "ok 12\n";
my $big;
print "ok 14\n";
# 705_032_704 = (I32)5_000_000_000
-fail unless seek(BIG, 705_032_704, $SEEK_SET);
+# See that we don't have "big" in the 705_... spot:
+# that would mean that we have a wraparound.
+fail unless sysseek(BIG, 705_032_704, SEEK_SET);
print "ok 15\n";
my $zero;
fail unless $zero eq "\0\0\0";
print "ok 17\n";
-explain if $fail;
+explain() if $fail;
bye(); # does the necessary cleanup
projects / p5sagit/p5-mst-13.2.git / blobdiff