Make {get,set}_inferior_io_terminal inferior methods

This converts the get_inferior_io_terminal and
set_inferior_io_terminal free functions to inferior methods.

Since the related commands are called "tty", "{set,show}
inferior-tty", and MI's "-inferior-tty-{set,show}", to make the
connection between the commands and the code more obvious, the methods
are named set_tty/tty instead of set_io_terminal/io_terminal.

gdb/ChangeLog:

	* fork-child.c (prefork_hook): Adjust.
	* infcmd.c (set_inferior_io_terminal, get_inferior_io_terminal):
	Delete.
	(set_inferior_tty_command, show_inferior_tty_command): Adjust.
	* inferior.c (inferior::set_tty, inferior::tty): New methods.
	* inferior.h (set_inferior_io_terminal, get_inferior_io_terminal):
	Remove declarations.
	(struct inferior) <set_tty, tty>: New methods.
	(struct inferior) <terminal>: Rename to ...
	(struct inferior) <m_terminal>: ... this and make private.
	* main.c (captured_main_1): Adjust.
	* mi/mi-cmd-env.c (mi_cmd_inferior_tty_set): Adjust.
	(mi_cmd_inferior_tty_show): Adjust.
	* nto-procfs.c (nto_procfs_target::create_inferior): Adjust.
	* windows-nat.c (windows_nat_target::create_inferior): Adjust.

1 files changed, 4 insertions, 5 deletions

diff --git a/gdb/mi/mi-cmd-env.c b/gdb/mi/mi-cmd-env.c
index 88158ce..52ba006 100644
--- a/gdb/mi/mi-cmd-env.c
+++ b/gdb/mi/mi-cmd-env.c
@@ -244,7 +244,7 @@ mi_cmd_env_dir (const char *command, char **argv, int argc)
 void
 mi_cmd_inferior_tty_set (const char *command, char **argv, int argc)
 {
-  set_inferior_io_terminal (argv[0]);
+  current_inferior ()->set_tty (argv[0]);
 }
 
 /* Print the inferior terminal device name.  */
@@ -252,13 +252,12 @@ mi_cmd_inferior_tty_set (const char *command, char **argv, int argc)
 void
 mi_cmd_inferior_tty_show (const char *command, char **argv, int argc)
 {
-  const char *inferior_io_terminal = get_inferior_io_terminal ();
-  
   if ( !mi_valid_noargs ("-inferior-tty-show", argc, argv))
     error (_("-inferior-tty-show: Usage: No args"));
 
-  if (inferior_io_terminal)
-    current_uiout->field_string ("inferior_tty_terminal", inferior_io_terminal);
+  const char *inferior_tty = current_inferior ()->tty ();
+  if (inferior_tty != NULL)
+    current_uiout->field_string ("inferior_tty_terminal", inferior_tty);
 }
 
 void _initialize_mi_cmd_env ();