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-list-commands.c b/cmd-list-commands.c
index f816221a..1bf6e703 100644
--- a/cmd-list-commands.c
+++ b/cmd-list-commands.c
@@ -24,7 +24,7 @@
  * List all commands with usages.
  */
 
-enum cmd_retval	 cmd_list_commands_exec(struct cmd *, struct cmd_ctx *);
+enum cmd_retval	 cmd_list_commands_exec(struct cmd *, struct cmd_q *);
 
 const struct cmd_entry cmd_list_commands_entry = {
 	"list-commands", "lscm",
@@ -37,16 +37,16 @@ const struct cmd_entry cmd_list_commands_entry = {
 };
 
 enum cmd_retval
-cmd_list_commands_exec(unused struct cmd *self, struct cmd_ctx *ctx)
+cmd_list_commands_exec(unused struct cmd *self, struct cmd_q *cmdq)
 {
 	const struct cmd_entry 	      **entryp;
 
 	for (entryp = cmd_table; *entryp != NULL; entryp++) {
 		if ((*entryp)->alias != NULL) {
-			ctx->print(ctx, "%s (%s) %s", (*entryp)->name,
+			cmdq_print(cmdq, "%s (%s) %s", (*entryp)->name,
 			    (*entryp)->alias, (*entryp)->usage);
 		} else {
-			ctx->print(ctx, "%s %s", (*entryp)->name,
+			cmdq_print(cmdq, "%s %s", (*entryp)->name,
 			    (*entryp)->usage);
 		}
 	}