From 2f978ec25a49e35d5b20427ec151b9dbd3cbd165 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 24 Jun 2004 05:23:44 +0000
Subject: [PATCH] * io.c (rb_io_fread): return already read data when system
 call is   interrupted.  [ruby-talk:97206]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6510 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog | 7 ++++++-
 io.c      | 5 ++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 8ed64361d2..14ac6739e2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jun 24 14:23:29 2004  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (rb_io_fread): return already read data when system call is
+	  interrupted.  [ruby-talk:97206]
+
 Thu Jun 24 01:25:21 2004  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* version.h: added declarations of ruby_version,
@@ -28,7 +33,7 @@ Wed Jun 23 17:37:54 2004  Shugo Maeda  <shugo@ruby-lang.org>
 
 Wed Jun 23 01:45:27 2004  Dave Thomas  <dave@pragprog.com>
 
-	* lib/rdoc/parsers/parse_rb.rb (RubyLex::identify_quotation): 
+	* lib/rdoc/parsers/parse_rb.rb (RubyLex::identify_quotation):
 	  Fix problem with the 'r' being dropped from %r{xxx}
 
 Wed Jun 23 00:10:17  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
diff --git a/io.c b/io.c
index f066099f5d..56155e7b9c 100644
--- a/io.c
+++ b/io.c
@@ -956,12 +956,11 @@ rb_io_fread(ptr, len, f)
 #if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
 		  case EWOULDBLOCK:
 #endif
-		    if (len - n >= 0) {
+		    if (len > n) {
 			clearerr(f);
-			return len - n;
 		    }
 		}
-		return 0;
+		if (len == n) return 0;
 	    }
 	    *ptr = '\0';
 	    break;