+sub get_partnum {
+ my ($part_path) = @_;
+
+ my ($mode, $rdev) = (stat($part_path))[2,6];
+
+ next if !$mode || !S_ISBLK($mode) || !$rdev;
+ my $major = int($rdev / 0x100);
+ my $minor = $rdev % 0x100;
+ my $partnum_path = "/sys/dev/block/$major:$minor/";
+
+ my $partnum;
+
+ $partnum = file_read_firstline("${partnum_path}partition");
+
+ die "Partition does not exists\n" if !defined($partnum);
+
+ #untaint and ensure it is a int
+ if ($partnum =~ m/(\d+)/) {
+ $partnum = $1;
+ die "Partition number $partnum is invalid\n" if $partnum > 128;
+ } else {
+ die "Failed to get partition number\n";
+ }
+
+ return $partnum;
+}
+