Upgrade to File::Spec 0.810_01 from CPAN by Barrie Slaymaker.

[p5sagit/p5-mst-13.2.git] / t / lib / syslfs.t

diff --git a/t/lib/syslfs.t b/t/lib/syslfs.t
index 4619e11..2857120 100644 (file)
--- a/t/lib/syslfs.t
+++ b/t/lib/syslfs.t
@@ -1,14 +1,8 @@
 # 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';
        require Config; import Config;
@@ -17,12 +11,18 @@ BEGIN {
                print "1..0\n# no 64-bit file offsets\n";
                exit(0);
        }
-       require Fcntl; import Fcntl;
+       require Fcntl; import Fcntl qw(/^O_/ /^SEEK_/);
 }
 
-sub bye {
+sub zap {
     close(BIG);
-    unlink "big";
+    unlink("big");
+    unlink("big1");
+    unlink("big2");
+}
+
+sub bye {
+    zap(); 
     exit(0);
 }
 
@@ -43,66 +43,87 @@ sub explain {
 EOM
 }
 
+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";
+    print "1..0\n# no sparse files (because this is $^O) \n";
     bye();
 }
 
 # Known haves that have problems running this test
 # (for example because they do not support sparse files, like UNICOS)
 if ($^O eq 'unicos') {
-    print "1..0\n# large files known to work but unable to test them here\n";
+    print "1..0\n# large files known to work but unable to test them here ($^O)\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\n#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.
 
 $ENV{LC_ALL} = "C";
 
 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 (defined $sysseek && $sysseek == 5_000_000_000) {
+    print "1..0\n# seeking past 2GB failed: $! (sysseek returned ",
+          defined $sysseek ? $sysseek : 'undef', ")\n";
+    explain();
+    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";
     } elsif ($! =~ /quota/i) {
@@ -116,6 +137,12 @@ unless($syswrite && $close) {
 
 print "# @s\n";
 
+unless ($s[7] == 5_000_000_003) {
+    print "1..0\n# not configured to use large files?\n";
+    explain();
+    bye();
+}
+
 sub fail () {
     print "not ";
     $fail++;
@@ -172,7 +199,7 @@ fail unless $big eq "big";
 print "ok 14\n";
 
 # 705_032_704 = (I32)5_000_000_000
-fail unless seek(BIG, 705_032_704, $SEEK_SET);
+fail unless seek(BIG, 705_032_704, SEEK_SET);
 print "ok 15\n";
 
 my $zero;
@@ -187,4 +214,8 @@ explain if $fail;
 
 bye(); # does the necessary cleanup
 
+END {
+   unlink "big"; # be paranoid about leaving 5 gig files lying around
+}
+
 # eof