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, 6 insertions, 6 deletions

diff --git a/usr.bin/tmux/cmd-respawn-pane.c b/usr.bin/tmux/cmd-respawn-pane.c
index 81f0884c74b..9bcfa273c6f 100644
--- a/usr.bin/tmux/cmd-respawn-pane.c
+++ b/usr.bin/tmux/cmd-respawn-pane.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-respawn-pane.c,v 1.7 2012/07/11 07:10:15 nicm Exp $ */
+/* $OpenBSD: cmd-respawn-pane.c,v 1.8 2013/03/24 09:54:10 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -28,7 +28,7 @@
  * Respawn a pane (restart the command). Kill existing if -k given.
  */
 
-enum cmd_retval	 cmd_respawn_pane_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_respawn_pane_exec(struct cmd *, struct cmd_q *);
 
 const struct cmd_entry cmd_respawn_pane_entry = {
 	"respawn-pane", "respawnp",
@@ -41,7 +41,7 @@ const struct cmd_entry cmd_respawn_pane_entry = {
 };
 
 enum cmd_retval
-cmd_respawn_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_respawn_pane_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args		*args = self->args;
 	struct winlink		*wl;
@@ -53,14 +53,14 @@ cmd_respawn_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 	char			*cause;
 	u_int			 idx;
 
-	if ((wl = cmd_find_pane(ctx, args_get(args, 't'), &s, &wp)) == NULL)
+	if ((wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp)) == NULL)
 		return (CMD_RETURN_ERROR);
 	w = wl->window;
 
 	if (!args_has(self->args, 'k') && wp->fd != -1) {
 		if (window_pane_index(wp, &idx) != 0)
 			fatalx("index not found");
-		ctx->error(ctx, "pane still active: %s:%u.%u",
+		cmdq_error(cmdq, "pane still active: %s:%u.%u",
 		    s->name, wl->idx, idx);
 		return (CMD_RETURN_ERROR);
 	}
@@ -79,7 +79,7 @@ cmd_respawn_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 	else
 		cmd = NULL;
 	if (window_pane_spawn(wp, cmd, NULL, NULL, &env, s->tio, &cause) != 0) {
-		ctx->error(ctx, "respawn pane failed: %s", cause);
+		cmdq_error(cmdq, "respawn pane failed: %s", cause);
 		free(cause);
 		environ_free(&env);
 		return (CMD_RETURN_ERROR);