require Fcntl; import Fcntl qw(/^O_/ /^SEEK_/);
}
+use strict;
+
+our @s;
+our $fail;
+
sub zap {
close(BIG);
unlink("big");
$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
+# 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";