[NaCl SDK] nacl_io: Add initial implementations of kill and signal

native_client_sdk/src/libraries/nacl_io/ioctl.h

Index: native_client_sdk/src/libraries/nacl_io/ioctl.h
diff --git a/native_client_sdk/src/libraries/nacl_io/ioctl.h b/native_client_sdk/src/libraries/nacl_io/ioctl.h
index 1d27c61eb5f07c55006cae2cf02a907de49e40a8..d12b853a9dc6e3a98884bda2334af172224d1bdc 100644
--- a/native_client_sdk/src/libraries/nacl_io/ioctl.h
+++ b/native_client_sdk/src/libraries/nacl_io/ioctl.h
@@ -5,21 +5,27 @@
 #ifndef LIBRARIES_NACL_IO_IOCTL_H_
 #define LIBRARIES_NACL_IO_IOCTL_H_
 
-/* ioctl to tell a tty mount to prefix every message with a particular
- * null-terminated string. Accepts a pointer to a C string which will
- * be the prefix.
- */
-#define TIOCNACLPREFIX 0xadcd01
-
-/* ioctl to feed input to a tty mount. Accepts a pointer to the following
+/*
+ * ioctl to feed input to a tty node. Accepts a pointer to the following
  * struct (tioc_nacl_input_string), which contains a pointer to an array
  * of characters.
  */
 #define TIOCNACLINPUT  0xadcd02
 
+/*
+ * ioctl to register an output handler with the tty node.  Will fail
+ * with EALREADY if a handler is already registered.  Call with NULL

[binji, 2013/08/22 18:09:36]

Why fail if already set? It could just overwrite it.

[Sam Clegg, 2013/08/22 19:52:25]

Just so the user knows when they do that.  Its probably
a coding error to do this.

+ * to unregister handler.

[binji, 2013/08/22 18:09:36]

document the thread that gets the callback: the thread that writes to the tty
node.

[Sam Clegg, 2013/08/22 19:52:25]

Done.

+ */
+#define TIOCNACLOUTPUT 0xadcd03
+
 struct tioc_nacl_input_string {
   size_t length;
   const char* buffer;
 };
 
+
+typedef int (*nacl_io_tty_output_handler_t)(const char* buf, int count);

[binji, 2013/08/22 18:09:36]

size_t for consistency with tioc_nacl_input_tstring

[binji, 2013/08/22 18:09:36]

tioc prefix?

[binji, 2013/08/22 18:09:36]

document that the return value is the number of bytes written.

[binji, 2013/08/22 18:09:36]

Make this a struct containing the function pointer and user_data?

[Sam Clegg, 2013/08/22 19:52:25]

Done.

[Sam Clegg, 2013/08/22 19:52:25]

Done.

[Sam Clegg, 2013/08/22 19:52:25]

Done.

[Sam Clegg, 2013/08/22 19:52:25]

Done.

+
+
 #endif  /* LIBRARIES_NACL_IO_NACL_IO_H_ */