Batch of small 64-bit/long double/large file support tweaks:

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

diff --git a/t/lib/syslfs.t b/t/lib/syslfs.t
index 206a2ef..c9d7120 100644 (file)
--- a/t/lib/syslfs.t
+++ b/t/lib/syslfs.t
@@ -26,6 +26,21 @@ sub bye {
     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";
@@ -51,11 +66,12 @@ my @s;
 
 print "# @s\n";
 
+my $BLOCKSIZE = 512; # is this really correct everywhere?
+
 unless (@s == 13 &&
        $s[7] == 1_000_003 &&
-       defined $s[11] &&
        defined $s[12] &&
-       $s[11] * $s[12] < 1000_003) {
+       $BLOCKSIZE * $s[12] < 1_000_003) {
     print "1..0\n# no sparse files?\n";
     bye();
 }
@@ -63,14 +79,18 @@ unless (@s == 13 &&
 # 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";
-
-my $fail = 0;
-
 sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
        do { warn "sysopen failed: $!\n"; bye };
 sysseek(BIG, 5_000_000_000, SEEK_SET);
-syswrite(BIG, "big");
+# The syswrite will fail if there are are filesize limitations (process or fs).
+unless(syswrite(BIG, "big") == 3) {
+    $ENV{LC_ALL} = "C";
+    if ($! =~/File too large/) {
+       print "1..0\n# writing past 2GB failed\n";
+       explain();
+       bye();
+    }
+}
 close BIG;
 
 @s = stat("big");
@@ -82,6 +102,10 @@ sub fail () {
     $fail++;
 }
 
+print "1..8\n";
+
+my $fail = 0;
+
 fail unless $s[7] == 5_000_000_003;    # exercizes pp_stat
 print "ok 1\n";
 
@@ -118,17 +142,8 @@ print "ok 7\n";
 fail unless $big eq "big";
 print "ok 8\n";
 
-bye();
+explain if $fail;
 
-if ($fail) {
-    print STDERR <<EOM;
-#
-# If the lfs (large file support) tests fail, it means that
-# the *file system* you are running the tests on doesn't support
-# large files (files larger than two gigabytes).  Perl may still
-# be able to support such files, once you have such a file system.
-#
-EOM
-}
+bye();
 
 # eof