From 94a415e4205ff6cfe7e7292897a3301da84109a4 Mon Sep 17 00:00:00 2001
From: Axel Burri <axel@tty0.ch>
Date: Sun, 15 Aug 2021 18:24:41 +0200
Subject: [PATCH] btrbk: check/sanitize leading/trailing whitespace on files

---
 btrbk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/btrbk b/btrbk
index 30e94a7..45da402 100755
--- a/btrbk
+++ b/btrbk
@@ -3915,10 +3915,17 @@ sub check_file($$;@)
     return undef;
   }
   if($sanitize) {
+    $file =~ s/^\s+//;
+    $file =~ s/\s+$//;
     $file =~ s/\/(\.?\/)+/\//g;  # sanitize "//", "/./" -> "/"
     $file =~ s/\/\.$/\//;        # sanitize trailing "/." -> "/"
     $file =~ s/\/$// unless($file eq '/');   # remove trailing slash
   }
+  elsif(($file =~ /^\s/) || ($file =~ /\s$/)) {
+    ERROR "Illegal leading/trailing whitespace ${error_statement}: \"$file\"" if(defined($error_statement));
+    return undef;
+  }
+
   return $file;
 }