Add a command queue to standardize and simplify commands that call other

commands and allow a command to block execution of subsequent
commands. This allows run-shell and if-shell to be synchronous which has
been much requested.

Each client has a default command queue and commands are consumed one at
a time from it. A command may suspend execution from the queue by
returning CMD_RETURN_WAIT and then resume it by calling cmd_continue() -
for example run-shell does this from the callback that is fired after
the job is freed.

When the command queue becomes empty, command clients are automatically
exited (unless attaching). A callback is also fired - this is used for
nested commands in, for example, if-shell which can block execution of
the client's cmdq until a new cmdq becomes empty.

Also merge all the old error/info/print functions together and lose the
old curclient/cmdclient distinction - a cmdq is bound to one client (or
none if in the configuration file), this is a command client if
c->session is NULL otherwise an attached client.

1 files changed, 4 insertions, 4 deletions

diff --git a/usr.bin/tmux/cmd-suspend-client.c b/usr.bin/tmux/cmd-suspend-client.c
index 1641558cd2d..b5c79e2b363 100644
--- a/usr.bin/tmux/cmd-suspend-client.c
+++ b/usr.bin/tmux/cmd-suspend-client.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-suspend-client.c,v 1.8 2013/03/24 09:27:20 nicm Exp $ */
+/* $OpenBSD: cmd-suspend-client.c,v 1.9 2013/03/24 09:54:10 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -27,7 +27,7 @@
  * Suspend client with SIGTSTP.
  */
 
-enum cmd_retval	 cmd_suspend_client_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_suspend_client_exec(struct cmd *, struct cmd_q *);
 
 const struct cmd_entry cmd_suspend_client_entry = {
 	"suspend-client", "suspendc",
@@ -40,12 +40,12 @@ const struct cmd_entry cmd_suspend_client_entry = {
 };
 
 enum cmd_retval
-cmd_suspend_client_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_suspend_client_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args	*args = self->args;
 	struct client	*c;
 
-	if ((c = cmd_find_client(ctx, args_get(args, 't'), 0)) == NULL)
+	if ((c = cmd_find_client(cmdq, args_get(args, 't'), 0)) == NULL)
 		return (CMD_RETURN_ERROR);
 
 	tty_stop_tty(&c->tty);