Hello,
can anyone confirm my observations with the attached test script?
pax corrupts files if they contain more than 57 holes in it.
I just found out today by accident after copying a large backup file. I was
able to reproduce the bug on Solaris 10 and snv133, on UFS and ZFS.
Is pax in the closed bins? I couldn't find its source code.
Daniel
#!/bin/perl -w
use Fcntl;
use Fcntl 'SEEK_CUR';
# 57 = Ok
# 58 = Error
$count = 58;
$file = "testfile-$count";
$cpdir = "n";
$holesize = 2**20;
$rand = 2**16;
sysopen(F, $file, O_RDWR|O_CREAT|O_TRUNC) or die "sysopen: $!";
foreach (1..$count)
{
$o = $holesize + rand($rand);
sysseek(F, $o, SEEK_CUR);
syswrite(F, "the quick brown fox jumps over the lazy dog");
}
close(F);
-d $cpdir or mkdir($cpdir, 0777);
system("pax -rw $file $cpdir");
system("md5sum $file");
system("md5sum $cpdir/$file");
unlink $file;
unlink "$cpdir/$file";
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