1 files changed, 51 insertions, 15 deletions

diff --git a/gdb/serial.c b/gdb/serial.c
index 75a0878..fec836b 100644
--- a/gdb/serial.c
+++ b/gdb/serial.c
@@ -49,7 +49,7 @@ static struct serial *scb_base;
 static char *serial_logfile = NULL;
 static struct ui_file *serial_logfp = NULL;
 
-static struct serial_ops *serial_interface_lookup (char *);
+static struct serial_ops *serial_interface_lookup (const char *);
 static void serial_logchar (struct ui_file *stream, int ch_type, int ch, int timeout);
 static const char logbase_hex[] = "hex";
 static const char logbase_octal[] = "octal";
@@ -147,7 +147,7 @@ serial_log_command (const char *cmd)
 
 
 static struct serial_ops *
-serial_interface_lookup (char *name)
+serial_interface_lookup (const char *name)
 {
   struct serial_ops *ops;
 
@@ -255,22 +255,27 @@ serial_for_fd (int fd)
   return NULL;
 }
 
-struct serial *
-serial_fdopen (const int fd)
+/* Open a new serial stream using a file handle, using serial
+   interface ops OPS.  */
+
+static struct serial *
+serial_fdopen_ops (const int fd, struct serial_ops *ops)
 {
   struct serial *scb;
-  struct serial_ops *ops;
 
-  for (scb = scb_base; scb; scb = scb->next)
-    if (scb->fd == fd)
-      {
-	scb->refcnt++;
-	return scb;
-      }
+  scb = serial_for_fd (fd);
+  if (scb)
+    {
+      scb->refcnt++;
+      return scb;
+    }
 
-  ops = serial_interface_lookup ("terminal");
   if (!ops)
-    ops = serial_interface_lookup ("hardwire");
+    {
+      ops = serial_interface_lookup ("terminal");
+      if (!ops)
+ 	ops = serial_interface_lookup ("hardwire");
+    }
 
   if (!ops)
     return NULL;
@@ -281,8 +286,7 @@ serial_fdopen (const int fd)
 
   scb->bufcnt = 0;
   scb->bufp = scb->buf;
-
-  scb->fd = fd;
+  scb->error_fd = -1;
 
   scb->name = NULL;
   scb->next = scb_base;
@@ -293,11 +297,22 @@ serial_fdopen (const int fd)
   scb->async_context = NULL;
   scb_base = scb;
 
+  if ((ops->fdopen) != NULL)
+    (*ops->fdopen) (scb, fd);
+  else
+    scb->fd = fd;
+
   last_serial_opened = scb;
 
   return scb;
 }
 
+struct serial *
+serial_fdopen (const int fd)
+{
+  return serial_fdopen_ops (fd, NULL);
+}
+
 static void
 do_serial_close (struct serial *scb, int really_close)
 {
@@ -582,6 +597,27 @@ serial_done_wait_handle (struct serial *scb)
 }
 #endif
 
+int
+serial_pipe (struct serial *scbs[2])
+{
+  struct serial_ops *ops;
+  int fildes[2];
+
+  ops = serial_interface_lookup ("pipe");
+  if (!ops)
+    {
+      errno = ENOSYS;
+      return -1;
+    }
+
+  if (gdb_pipe (fildes) == -1)
+    return -1;
+
+  scbs[0] = serial_fdopen_ops (fildes[0], ops);
+  scbs[1] = serial_fdopen_ops (fildes[1], ops);
+  return 0;
+}
+
 #if 0
 /* The connect command is #if 0 because I hadn't thought of an elegant
    way to wait for I/O on two `struct serial *'s simultaneously.  Two