nobu	2015-07-08 14:05:12 +0900 (Wed, 08 Jul 2015)

  New Revision: 51192

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=51192

  Log:
    pass saved errno
    
    * ext/socket/socket.c (socket_s_ip_address_list): pass saved errno
      to rb_syserr_fail.
    
    * ext/readline/readline.c (readline_getc, readline_s_set_input),
      (readline_s_set_output): ditto.

  Modified files:
    trunk/ext/readline/readline.c
    trunk/ext/socket/socket.c
Index: ext/readline/readline.c
===================================================================
--- ext/readline/readline.c	(revision 51191)
+++ ext/readline/readline.c	(revision 51192)
@@ -229,8 +229,7 @@ readline_getc(FILE *input) https://github.com/ruby/ruby/blob/trunk/ext/readline/readline.c#L229
                 goto again;
             rb_sys_fail("rb_wait_for_single_fd");
         }
-        errno = data.err;
-        rb_sys_fail("read");
+        rb_syserr_fail(data.err, "read");
     }
     return data.ret;
 }
@@ -557,8 +556,7 @@ readline_s_set_input(VALUE self, VALUE i https://github.com/ruby/ruby/blob/trunk/ext/readline/readline.c#L556
         if (f == NULL) {
             int save_errno = errno;
             close(fd);
-            errno = save_errno;
-            rb_sys_fail("fdopen");
+            rb_syserr_fail(save_errno, "fdopen");
         }
         rl_instream = readline_rl_instream = f;
         readline_instream = input;
@@ -594,8 +592,7 @@ readline_s_set_output(VALUE self, VALUE https://github.com/ruby/ruby/blob/trunk/ext/readline/readline.c#L592
         if (f == NULL) {
             int save_errno = errno;
             close(fd);
-            errno = save_errno;
-            rb_sys_fail("fdopen");
+            rb_syserr_fail(save_errno, "fdopen");
         }
         rl_outstream = readline_rl_outstream = f;
         readline_outstream = output;
Index: ext/socket/socket.c
===================================================================
--- ext/socket/socket.c	(revision 51191)
+++ ext/socket/socket.c	(revision 51192)
@@ -1850,7 +1850,7 @@ socket_s_ip_address_list(VALUE self) https://github.com/ruby/ruby/blob/trunk/ext/socket/socket.c#L1850
     errno = save_errno;
 
     if (reason)
-	rb_sys_fail(reason);
+	rb_syserr_fail(save_errno, reason);
     return list;
 
 #elif defined(SIOCGIFCONF)
@@ -1935,7 +1935,7 @@ socket_s_ip_address_list(VALUE self) https://github.com/ruby/ruby/blob/trunk/ext/socket/socket.c#L1935
     errno = save_errno;
 
     if (reason)
-	rb_sys_fail(reason);
+	rb_syserr_fail(save_errno, reason);
     return list;
 
 #undef EXTRA_SPACE

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