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/cmd-unlink-window.c b/cmd-unlink-window.c
index 19731ba5..39cdd8ed 100644
--- a/cmd-unlink-window.c
+++ b/cmd-unlink-window.c
@@ -24,7 +24,7 @@
  * Unlink a window, unless it would be destroyed by doing so (only one link).
  */
 
-enum cmd_retval	 cmd_unlink_window_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_unlink_window_exec(struct cmd *, struct cmd_q *);
 
 const struct cmd_entry cmd_unlink_window_entry = {
 	"unlink-window", "unlinkw",
@@ -37,7 +37,7 @@ const struct cmd_entry cmd_unlink_window_entry = {
 };
 
 enum cmd_retval
-cmd_unlink_window_exec(struct cmd *self, struct cmd_ctx *ctx)
+cmd_unlink_window_exec(struct cmd *self, struct cmd_q *cmdq)
 {
 	struct args		*args = self->args;
 	struct winlink		*wl;
@@ -46,7 +46,7 @@ cmd_unlink_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	struct session_group	*sg;
 	u_int			 references;
 
-	if ((wl = cmd_find_window(ctx, args_get(args, 't'), &s)) == NULL)
+	if ((wl = cmd_find_window(cmdq, args_get(args, 't'), &s)) == NULL)
 		return (CMD_RETURN_ERROR);
 	w = wl->window;
 
@@ -59,7 +59,7 @@ cmd_unlink_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		references = 1;
 
 	if (!args_has(self->args, 'k') && w->references == references) {
-		ctx->error(ctx, "window is only linked to one session");
+		cmdq_error(cmdq, "window is only linked to one session");
 		return (CMD_RETURN_ERROR);
 	}