[hurd] 01/03: Look up device file name on device_open

[Samuel Thibault]

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sthibault pushed a commit to branch dde
in repository hurd.

commit 1521cb49429b33259c11f27b6175d691d3055025
Author: rekado <address@hidden>
Date:   Thu Sep 12 14:10:55 2013 +0800

    Look up device file name on device_open
    
    A fresh `master_device' port is now obtained when accessing the device
    file, not only on translator startup.  This ensures that the device
    can be re-opened after netdde has died.
    
    * devnode/devnode.c (ds_device_open): When `master_file' is not NULL,
    re-acquire a fresh `master_device' value by calling file_name_lookup again.
---
 devnode/devnode.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/devnode/devnode.c b/devnode/devnode.c
index 50011aa..218b308 100644
--- a/devnode/devnode.c
+++ b/devnode/devnode.c
@@ -164,6 +164,16 @@ ds_device_open (mach_port_t master_port, mach_port_t 
reply_port,
       || device_name == NULL) 
       return D_NO_SUCH_DEVICE;
 
+  if (master_file != NULL)
+    {
+      if (master_device != MACH_PORT_NULL)
+        mach_port_deallocate (mach_task_self (), master_device);
+
+      master_device = file_name_lookup (master_file, 0, 0);
+      if (master_device == MACH_PORT_NULL)
+        error (1, errno, "file_name_lookup");
+    }
+
   err = device_open (master_device, mode, device_name, device); 
   *devicetype = MACH_MSG_TYPE_MOVE_SEND;
   return err;

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