From c59ae6812f148839a5d07e1dd266c12fa7f3b2f5 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: May 21 2018 05:44:57 +0000
Subject: driver: require --cmd=<cmd> as needed.


---

diff --git a/project/tree.mk b/project/tree.mk
index 2aadd88..2a78989 100644
--- a/project/tree.mk
+++ b/project/tree.mk
@@ -1,5 +1,6 @@
 tree.tag:
 		mkdir -p src
+		mkdir -p src/cmds
 		mkdir -p src/driver
 		mkdir -p src/internal
 		mkdir -p src/internal/nolibc
diff --git a/src/driver/ntux_amain.c b/src/driver/ntux_amain.c
index 709c73b..6b9acf4 100644
--- a/src/driver/ntux_amain.c
+++ b/src/driver/ntux_amain.c
@@ -47,6 +47,14 @@ static ssize_t ntux_version(struct ntux_driver_ctx * dctx)
 			verclr[4],verinfo->commit,verclr[5]);
 }
 
+static void ntux_perform_unit_actions(
+	const struct ntux_driver_ctx *	dctx,
+	const char *			unit)
+{
+	(void)dctx;
+	(void)unit;
+}
+
 static int ntux_exit(struct ntux_driver_ctx * dctx, int ret)
 {
 	ntux_free_driver_ctx(dctx);
@@ -57,6 +65,7 @@ int ntux_main(int argc, char ** argv, char ** envp)
 {
 	int				ret;
 	struct ntux_driver_ctx *	dctx;
+	const char **			unit;
 
 	if ((ret = ntux_get_driver_ctx(argv,envp,NTUX_DRIVER_FLAGS,&dctx)))
 		return (ret == NTUX_USAGE)
@@ -67,5 +76,8 @@ int ntux_main(int argc, char ** argv, char ** envp)
 		if ((ntux_version(dctx)) < 0)
 			return ntux_exit(dctx,NTUX_ERROR);
 
+	for (unit=dctx->units; *unit; unit++)
+		ntux_perform_unit_actions(dctx,*unit);
+
 	return ntux_exit(dctx,dctx->errv[0] ? NTUX_ERROR : NTUX_OK);
 }
diff --git a/src/driver/ntux_driver_ctx.c b/src/driver/ntux_driver_ctx.c
index 0398d5f..2aca14c 100644
--- a/src/driver/ntux_driver_ctx.c
+++ b/src/driver/ntux_driver_ctx.c
@@ -175,6 +175,9 @@ int ntux_get_driver_ctx(
 			nunits++;
 	}
 
+	if (nunits && !cctx.cmd)
+		return ntux_driver_usage(program,0,optv,meta);
+
 	if (!(ctx = ntux_driver_ctx_alloc(meta,&cctx,nunits)))
 		return ntux_get_driver_ctx_fail(meta);