sandbox: Return '-c command' exit value as sandbox exit code

When a command is passed into sandbox using the '-c' argument the
command is run directly. This is most helpful when running tests (such
as test-dm.sh). Previously the exit code was an unused enum. Change it
to be the actual return code from the command so that the script calling
sandbox can know if the command succeeded (tests passed).  Also remove
the now completely unused "exit_state" in sandbox.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/sandbox/cpu/start.c

@@ -78,11 +78,13 @@ int sandbox_main_loop_init(void)
 
 	/* Execute command if required */
 	if (state->cmd) {
+		int retval;
+
 		cli_init();
 
-		run_command_list(state->cmd, -1, 0);
+		retval = run_command_list(state->cmd, -1, 0);
 		if (!state->interactive)
-			os_exit(state->exit_type);
+			os_exit(retval);
 	}
 
 	return 0;

arch/sandbox/cpu/state.c

@@ -13,11 +13,6 @@
 static struct sandbox_state main_state;
 static struct sandbox_state *state;	/* Pointer to current state record */
 
-void state_record_exit(enum exit_type_id exit_type)
-{
-	state->exit_type = exit_type;
-}
-
 static int state_ensure_space(int extra_size)
 {
 	void *blob = state->state_fdt;

arch/sandbox/include/asm/state.h

@@ -10,13 +10,6 @@
 #include <stdbool.h>
 #include <linux/stringify.h>
 
-/* How we exited U-Boot */
-enum exit_type_id {
-	STATE_EXIT_NORMAL,
-	STATE_EXIT_COLD_REBOOT,
-	STATE_EXIT_POWER_OFF,
-};
-
 /**
  * Selects the behavior of the serial terminal.
  *
@@ -50,7 +43,6 @@ struct sandbox_state {
 	const char *cmd;		/* Command to execute */
 	bool interactive;		/* Enable cmdline after execute */
 	const char *fdt_fname;		/* Filename of FDT binary */
-	enum exit_type_id exit_type;	/* How we exited U-Boot */
 	const char *parse_err;		/* Error to report from parsing */
 	int argc;			/* Program arguments */
 	char **argv;			/* Command line arguments */
@@ -138,13 +130,6 @@ struct sandbox_state_io {
 		.compat = _compat, \
 	}
 
-/**
- * Record the exit type to be reported by the test program.
- *
- * @param exit_type	Exit type to record
- */
-void state_record_exit(enum exit_type_id exit_type);
-
 /**
  * Gets a pointer to the current state.
  *