diff -rup src//gdb/top.c dst//gdb/top.c
--- src//gdb/top.c	2011-06-28 00:51:50.000000000 +0530
+++ dst//gdb/top.c	2011-07-09 13:11:57.480044436 +0530
@@ -48,6 +48,7 @@
 #include "event-loop.h"
 #include "gdbthread.h"
 #include "python/python.h"
+#include "ui-file.h"
 
 /* readline include files.  */
 #include "readline/readline.h"
@@ -358,6 +359,20 @@ prepare_execute_command (void)
   return cleanup;
 }
 
+
+/* Run execute_command for P and FROM_TTY. Write output in pipe, 
+   do not display it to the screen.  */
+
+void
+execute_command_to_pipe (char *p, int from_tty, FILE *pipe)
+{
+  FILE *file;
+  
+  file = gdb_modify_io (gdb_stdout, pipe);
+  execute_command (p, from_tty);
+  pipe = gdb_modify_io (gdb_stdout, file);
+  pclose (pipe);
+}
 /* Execute the line P as a command, in the current user context.
    Pass FROM_TTY as second argument to the defining function.  */
 
@@ -368,7 +383,16 @@ execute_command (char *p, int from_tty)
   struct cmd_list_element *c;
   enum language flang;
   static int warned = 0;
-  char *line;
+  char *line, *sh_cmd;
+
+  if ((sh_cmd = strchr(p,'|')) != NULL) 
+    {
+      FILE *pipe;
+      *sh_cmd++ = '\0';
+      pipe = popen (sh_cmd, "w");
+      execute_command_to_pipe (p, from_tty, pipe);
+      return;
+    }
 
   cleanup = prepare_execute_command ();
 
diff -rup src//gdb/ui-file.c dst//gdb/ui-file.c
--- src//gdb/ui-file.c	2011-05-14 11:14:36.000000000 +0530
+++ dst//gdb/ui-file.c	2011-07-09 13:16:50.404045208 +0530
@@ -617,6 +617,21 @@ struct ui_file *
 stdio_fileopen (FILE *file)
 {
   return stdio_file_new (file, 0);
+
+}
+
+FILE *
+gdb_modify_io (struct ui_file *file, FILE *iostream_new)
+{
+  FILE *iostream_old;
+  struct stdio_file *stdio = ui_file_data (file);
+
+  if (stdio->magic != &stdio_file_magic)
+    internal_error (__FILE__, __LINE__,
+		    _("stdio_file_flush: bad magic number"));
+  iostream_old = stdio->file;
+  stdio->file = iostream_new;
+  return iostream_old;
 }
 
 struct ui_file *
diff -rup src//gdb/ui-file.h dst//gdb/ui-file.h
--- src//gdb/ui-file.h	2011-05-13 22:58:20.000000000 +0530
+++ dst//gdb/ui-file.h	2011-07-09 13:14:21.484044803 +0530
@@ -126,6 +126,9 @@ extern struct ui_file *stdio_fileopen (F
 /* Open NAME returning an STDIO based UI_FILE.  */
 extern struct ui_file *gdb_fopen (char *name, char *mode);
 
+/* Modify the file pointer of an STDIO based UI_FILE. */
+FILE *gdb_modify_io (struct ui_file *file, FILE *iostream_new);
+
 /* Create a file which writes to both ONE and TWO.  CLOSE_ONE
    and CLOSE_TWO indicate whether the original files should be
    closed when the new file is closed.  */