From bdc7867793849086709cbb7fe65e51661da00eb5 Mon Sep 17 00:00:00 2001
From: Kazuki Yamaguchi <k@rhe.jp>
Date: Wed, 14 Oct 2026 00:23:23 +0900
Subject: [PATCH] ssl: do not rescue Errno::EAGAIN

SSLSocket#sysread and #syswrite never raise Errno::EAGAIN.

It appears to me that commit ruby/ruby@a9fb0817a154 (should wait for
that the underlying IO become readable or writable if the error was
SSL_ERROR_WANT_READ or SSL_ERROR_WANT_WRITE, 2005-03-05) made this
rescue unnecessary.
---
 lib/openssl/buffering.rb | 24 +++++++-----------------
 1 file changed, 7 insertions(+), 17 deletions(-)

diff --git a/lib/openssl/buffering.rb b/lib/openssl/buffering.rb
index 1464a4292..771cfc95c 100644
--- a/lib/openssl/buffering.rb
+++ b/lib/openssl/buffering.rb
@@ -74,8 +74,6 @@ def initialize(*)
   def fill_rbuff
     begin
       @rbuffer.append_as_bytes(self.sysread(BLOCK_SIZE))
-    rescue Errno::EAGAIN
-      retry
     rescue EOFError
       @eof = true
     end
@@ -152,11 +150,7 @@ def readpartial(maxlen, buf=nil)
       end
     end
     if @rbuffer.empty?
-      begin
-        return sysread(maxlen, buf)
-      rescue Errno::EAGAIN
-        retry
-      end
+      return sysread(maxlen, buf)
     end
     ret = consume_rbuff(maxlen)
     if buf
@@ -356,17 +350,13 @@ def do_write(s)
       nwrote = 0
       begin
         while nwrote < buffer_size do
-          begin
-            chunk = if nwrote > 0
-              @wbuffer.byteslice(nwrote, @wbuffer.bytesize)
-            else
-              @wbuffer
-            end
-
-            nwrote += syswrite(chunk)
-          rescue Errno::EAGAIN
-            retry
+          chunk = if nwrote > 0
+            @wbuffer.byteslice(nwrote, @wbuffer.bytesize)
+          else
+            @wbuffer
           end
+
+          nwrote += syswrite(chunk)
         end
       ensure
         if nwrote < @wbuffer.bytesize