From: Daniel Jacobowitz <drow@false.org>
Date: Fri, 13 Nov 2009 22:54:42 +0000 (+0000)
Subject: 	* ui-file.c (stdio_file_read): Call gdb_select before read.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ad960ed22e5c049c6e700a2f04c0231534e35177;p=binutils-gdb.git

	* ui-file.c (stdio_file_read): Call gdb_select before read.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index aaa0af46218..f6aa0cf9f1d 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2009-11-13  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* ui-file.c (stdio_file_read): Call gdb_select before read.
+
 2009-11-13  Maciej W. Rozycki  <macro@codesourcery.com>
 
 	* mips-tdep.c (mips_insn16_frame_this_id): Mark the outermost
diff --git a/gdb/ui-file.c b/gdb/ui-file.c
index 527917c414f..b9ddbb5c5a7 100644
--- a/gdb/ui-file.c
+++ b/gdb/ui-file.c
@@ -23,6 +23,7 @@
 #include "defs.h"
 #include "ui-file.h"
 #include "gdb_string.h"
+#include "gdb_select.h"
 
 #include <errno.h>
 
@@ -471,6 +472,19 @@ stdio_file_read (struct ui_file *file, char *buf, long length_buf)
   if (stdio->magic != &stdio_file_magic)
     internal_error (__FILE__, __LINE__,
 		    _("stdio_file_read: bad magic number"));
+
+  /* For the benefit of Windows, call gdb_select before reading from
+     the file.  Wait until at least one byte of data is available.
+     Control-C can interrupt gdb_select, but not read.  */
+  {
+    int fd = fileno (stdio->file);
+    fd_set readfds;
+    FD_ZERO (&readfds);
+    FD_SET (fd, &readfds);
+    if (gdb_select (fd + 1, &readfds, NULL, NULL, NULL) == -1)
+      return -1;
+  }
+
   return read (fileno (stdio->file), buf, length_buf);
 }