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 181a147..c9d7120 100644 (file)
--- a/t/lib/syslfs.t
+++ b/t/lib/syslfs.t
@@ -3,13 +3,20 @@
 # 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";
-               bye();
+               exit(0);
        }
        chdir 't' if -d 't';
        unshift @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";
+               exit(0);
+       }
        require Fcntl; import Fcntl;
 }
 
@@ -19,15 +26,33 @@ sub bye {
     exit(0);
 }
 
-# First try to figure out whether we have sparse files.
+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";
     bye();
 }
 
+# Then try to deduce whether we have sparse files.
+
 # We'll start off by creating a one megabyte file which has
-# only three "true" bytes.
+# 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 };
@@ -41,11 +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();
 }
@@ -53,54 +79,71 @@ 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";
-
 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");
 
 print "# @s\n";
 
-print "not " unless $s[7] == 5_000_000_003;
+sub fail () {
+    print "not ";
+    $fail++;
+}
+
+print "1..8\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";
 
 sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
 
 sysseek(BIG, 4_500_000_000, SEEK_SET);
 
-print "not " unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
+fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
 print "ok 3\n";
 
 sysseek(BIG, 1, SEEK_CUR);
 
-print "not " unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
+fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
 print "ok 4\n";
 
 sysseek(BIG, -1, SEEK_CUR);
 
-print "not " unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
+fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
 print "ok 5\n";
 
 sysseek(BIG, -3, SEEK_END);
 
-print "not " unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
+fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
 print "ok 6\n";
 
 my $big;
 
-print "not " unless sysread(BIG, $big, 3) == 3;
+fail unless sysread(BIG, $big, 3) == 3;
 print "ok 7\n";
 
-print "not " unless $big eq "big";
+fail unless $big eq "big";
 print "ok 8\n";
 
+explain if $fail;
+
 bye();
 
 # eof