X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Flib%2Fsyslfs.t;h=ce91db6e3cb042c65ad7a3e297244f5a5b5903e6;hb=6b8eaf932222db04db65aff99717b9c1dbd0a692;hp=181a147f51fcba9a824b7d990c1ee02ea8c9c83f;hpb=ea2b5ef6d751420797c96208ee3824f54bf1d97a;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/t/lib/syslfs.t b/t/lib/syslfs.t
index 181a147..ce91db6 100644
--- a/t/lib/syslfs.t
+++ b/t/lib/syslfs.t
@@ -3,13 +3,14 @@
 # If you modify/add tests here, remember to update also t/op/lfs.t.
 
 BEGIN {
-	eval { my $q = pack "q", 0 };
-	if ($@) {
-		print "1..0\n# no 64-bit types\n";
-		bye();
-	}
 	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 +20,42 @@ 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
+# (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.)
+#
+# Perl may still be able to support large files, once you have
+# such a process, enough quota, 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();
 }
 
+# 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";
+    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 +69,12 @@ my @s;
 
 print "# @s\n";
 
+my $BLOCKSIZE = $s[11] || 512;
+
 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 +82,113 @@ 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";
+$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);
-syswrite(BIG, "big");
-close BIG;
+
+# The syswrite will fail if there are are filesize limitations (process or fs).
+my $syswrite = syswrite(BIG, "big") == 3;
+my $close   = close BIG if $syswrite;
+unless($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) {
+	print "1..0\n# filesystem quota limits?\n";
+    }
+    explain();
+    bye();
+}
 
 @s = stat("big");
 
 print "# @s\n";
 
-print "not " unless $s[7] == 5_000_000_003;
+unless ($s[7] == 5_000_000_003) {
+    print "1..0\n# not configured to use large files?\n";
+    explain();
+    bye();
+}
+
+sub fail () {
+    print "not ";
+    $fail++;
+}
+
+print "1..17\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";
 
+fail unless -e "big";
+print "ok 3\n";
+
+fail unless -f "big";
+print "ok 4\n";
+
 sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
 
-sysseek(BIG, 4_500_000_000, SEEK_SET);
+fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000;
+print "ok 5\n";
 
-print "not " unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
-print "ok 3\n";
+fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
+print "ok 6\n";
 
-sysseek(BIG, 1, SEEK_CUR);
+fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001;
+print "ok 7\n";
 
-print "not " unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
-print "ok 4\n";
+fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
+print "ok 8\n";
 
-sysseek(BIG, -1, SEEK_CUR);
+fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000;
+print "ok 9\n";
 
-print "not " unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
-print "ok 5\n";
+fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
+print "ok 10\n";
 
-sysseek(BIG, -3, SEEK_END);
+fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000;
+print "ok 11\n";
 
-print "not " unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
-print "ok 6\n";
+fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
+print "ok 12\n";
 
 my $big;
 
-print "not " unless sysread(BIG, $big, 3) == 3;
-print "ok 7\n";
+fail unless sysread(BIG, $big, 3) == 3;
+print "ok 13\n";
 
-print "not " unless $big eq "big";
-print "ok 8\n";
+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);
+print "ok 15\n";
+
+my $zero;
 
-bye();
+fail unless read(BIG, $zero, 3) == 3;
+print "ok 16\n";
+
+fail unless $zero eq "\0\0\0";
+print "ok 17\n";
+
+explain if $fail;
+
+bye(); # does the necessary cleanup
+
+END {
+   unlink "big"; # be paranoid about leaving 5 gig files lying around
+}
 
 # eof