1 files changed, 5 insertions, 5 deletions
diff --git a/lib/webrick/httpservlet/cgi_runner.rb b/lib/webrick/httpservlet/cgi_runner.rb
index 006abd458e..0398c16749 100644
--- a/lib/webrick/httpservlet/cgi_runner.rb
+++ b/lib/webrick/httpservlet/cgi_runner.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #
 # cgi_runner.rb -- CGI launcher.
 #
@@ -13,21 +14,20 @@ def sysread(io, size)
   while size > 0
     tmp = io.sysread(size)
     buf << tmp
-    size -= tmp.size
+    size -= tmp.bytesize
   end
   return buf
 end
 
 STDIN.binmode
 
-buf = ""
 len = sysread(STDIN, 8).to_i
 out = sysread(STDIN, len)
-STDOUT.reopen(open(out, "w"))
+STDOUT.reopen(File.open(out, "w"))
 
 len = sysread(STDIN, 8).to_i
 err = sysread(STDIN, len)
-STDERR.reopen(open(err, "w"))
+STDERR.reopen(File.open(err, "w"))
 
 len  = sysread(STDIN, 8).to_i
 dump = sysread(STDIN, len)
@@ -38,7 +38,7 @@ hash.each{|k, v| ENV[k] = v if v }
 dir = File::dirname(ENV["SCRIPT_FILENAME"])
 Dir::chdir dir
 
-if interpreter = ARGV[0]
+if ARGV[0]
   argv = ARGV.dup
   argv << ENV["SCRIPT_FILENAME"]
   exec(*argv)