leaking_addresses: simplify path skipping
Currently script has multiple configuration arrays. This is confusing,
evident by the fact that a bunch of the entries are in the wrong place.
We can simplify the code by just having a single array for absolute
paths to skip and a single array for file names to skip wherever they
appear in the scanned directory tree. There are also currently multiple
subroutines to handle the different arrays, we can reduce these to a
single subroutine also.
Simplify the path skipping code.
Signed-off-by: Tobin C. Harding <[email protected]>
diff --git a/scripts/leaking_addresses.pl b/scripts/leaking_addresses.pl
index 3d5c309..2ad6e7f 100755
--- a/scripts/leaking_addresses.pl
+++ b/scripts/leaking_addresses.pl
@@ -48,41 +48,26 @@
my $opt_32bit = 0; # Scan 32-bit kernel.
my $page_offset_32bit = 0; # Page offset for 32-bit kernel.
-# Do not parse these files (absolute path).
-my @skip_parse_files_abs = ('/proc/kmsg',
- '/proc/kcore',
- '/proc/fs/ext4/sdb1/mb_groups',
- '/proc/1/fd/3',
- '/sys/firmware/devicetree',
- '/proc/device-tree',
- '/sys/kernel/debug/tracing/trace_pipe',
- '/sys/kernel/security/apparmor/revision');
+# Skip these absolute paths.
+my @skip_abs = (
+ '/proc/kmsg',
+ '/proc/device-tree',
+ '/sys/firmware/devicetree',
+ '/sys/kernel/debug/tracing/trace_pipe',
+ '/sys/kernel/security/apparmor/revision');
-# Do not parse these files under any subdirectory.
-my @skip_parse_files_any = ('0',
- '1',
- '2',
- 'pagemap',
- 'events',
- 'access',
- 'registers',
- 'snapshot_raw',
- 'trace_pipe_raw',
- 'ptmx',
- 'trace_pipe');
-
-# Do not walk these directories (absolute path).
-my @skip_walk_dirs_abs = ();
-
-# Do not walk these directories under any subdirectory.
-my @skip_walk_dirs_any = ('self',
- 'thread-self',
- 'cwd',
- 'fd',
- 'usbmon',
- 'stderr',
- 'stdin',
- 'stdout');
+# Skip these under any subdirectory.
+my @skip_any = (
+ 'pagemap',
+ 'events',
+ 'access',
+ 'registers',
+ 'snapshot_raw',
+ 'trace_pipe_raw',
+ 'ptmx',
+ 'trace_pipe',
+ 'fd',
+ 'usbmon');
sub help
{
@@ -417,26 +402,20 @@
# True if we should skip this path.
sub skip
{
- my ($path, $paths_abs, $paths_any) = @_;
+ my ($path) = @_;
- foreach (@$paths_abs) {
+ foreach (@skip_abs) {
return 1 if (/^$path$/);
}
my($filename, $dirs, $suffix) = fileparse($path);
- foreach (@$paths_any) {
+ foreach (@skip_any) {
return 1 if (/^$filename$/);
}
return 0;
}
-sub skip_parse
-{
- my ($path) = @_;
- return skip($path, \@skip_parse_files_abs, \@skip_parse_files_any);
-}
-
sub timed_parse_file
{
my ($file) = @_;
@@ -466,12 +445,6 @@
return;
}
- if (skip_parse($file)) {
- dprint "skipping file: $file\n";
- return;
- }
- dprint "parsing: $file\n";
-
open my $fh, "<", $file or return;
while ( <$fh> ) {
if (may_leak_address($_)) {
@@ -481,21 +454,12 @@
close $fh;
}
-
-# True if we should skip walking this directory.
-sub skip_walk
-{
- my ($path) = @_;
- return skip($path, \@skip_walk_dirs_abs, \@skip_walk_dirs_any)
-}
-
# Recursively walk directory tree.
sub walk
{
my @dirs = @_;
while (my $pwd = shift @dirs) {
- next if (skip_walk($pwd));
next if (!opendir(DIR, $pwd));
my @files = readdir(DIR);
closedir(DIR);
@@ -506,11 +470,15 @@
my $path = "$pwd/$file";
next if (-l $path);
+ next if (skip($path));
+
if (-d $path) {
push @dirs, $path;
- } else {
- timed_parse_file($path);
+ next;
}
+
+ dprint "parsing: $path\n";
+ timed_parse_file($path);
}
}
}
