From 5ec9b67e061e7bf839d6ae986354190d2e1e0037 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: May 23 2018 03:49:18 +0000
Subject: ntux_cmd_spawn(): initial implementation and integration.


---

diff --git a/include/ntux/ntux.h b/include/ntux/ntux.h
index d56e795..e5f4ac6 100644
--- a/include/ntux/ntux.h
+++ b/include/ntux/ntux.h
@@ -109,6 +109,7 @@ ntux_api void ntux_free_driver_ctx	(struct ntux_driver_ctx *);
 
 /* cmd api */
 ntux_api int  ntux_cmd_stat		(const struct ntux_driver_ctx *, const char *);
+ntux_api int  ntux_cmd_spawn		(const struct ntux_driver_ctx *);
 
 /* utility api */
 ntux_api int  ntux_main			(int, char **, char **);
diff --git a/project/common.mk b/project/common.mk
index bfc901d..c3dde46 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -14,6 +14,7 @@ INTERNAL_SRCS = \
 	src/internal/ntux_strerr_impl.c \
 
 CMD_SRCS = \
+	src/cmds/ntux_cmd_spawn.c \
 	src/cmds/ntux_cmd_stat.c \
 
 OUTPUT_SRCS = \
diff --git a/src/cmds/ntux_cmd_spawn.c b/src/cmds/ntux_cmd_spawn.c
new file mode 100644
index 0000000..cb88696
--- /dev/null
+++ b/src/cmds/ntux_cmd_spawn.c
@@ -0,0 +1,54 @@
+/***********************************************************/
+/*  ntux: native translation und extension                 */
+/*  Copyright (C) 2016--2018  Z. Gilboa                    */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTUX.      */
+/***********************************************************/
+
+#include <ntapi/ntapi.h>
+#include <psxabi/sys_sysapi.h>
+#include <psxabi/sys_errno.h>
+
+#include <ntux/ntux.h>
+#include "ntux_driver_impl.h"
+#include "ntux_nolibc_impl.h"
+#include "ntux_errinfo_impl.h"
+
+int ntux_cmd_spawn(const struct ntux_driver_ctx * dctx)
+{
+	int32_t		status;
+	pid_t		pid;
+	const char **	argv;
+	const char **	envp;
+	unsigned char * program;
+
+	/* init */
+	ntux_driver_set_ectx(
+		dctx,0,
+		dctx->cctx->sargv[0]);
+
+	argv    = (const char **)dctx->cctx->sargv;
+	envp    = (const char **)dctx->cctx->senvp;
+	program = (unsigned char *)dctx->cctx->sargv[0];
+
+	/* spawn */
+	pid = __sys_vfork();
+
+	/* failed? */
+	if (pid < 0)
+		if (ntux_errno_set(dctx,pid))
+			return NTUX_SYSTEM_ERROR(dctx);
+
+	/* child */
+	if (pid == 0)
+		if ((status = __sys_execve(program,argv,envp)))
+			if (ntux_errno_set(dctx,status))
+				if (NTUX_SYSTEM_ERROR(dctx))
+					__sys_exit(0);
+
+	/* parent */
+	__sys_wait4(
+		pid,&status,
+		0,0);
+
+	return 0;
+}
diff --git a/src/driver/ntux_amain.c b/src/driver/ntux_amain.c
index 5a9dfc9..9a1d9e1 100644
--- a/src/driver/ntux_amain.c
+++ b/src/driver/ntux_amain.c
@@ -77,6 +77,9 @@ int ntux_main(int argc, char ** argv, char ** envp)
 		if ((ntux_version(dctx)) < 0)
 			return ntux_exit(dctx,NTUX_ERROR);
 
+	if (dctx->cctx->cmd == NTUX_CMD_SPAWN)
+		ntux_cmd_spawn(dctx);
+
 	for (unit=dctx->units; *unit; unit++)
 		ntux_perform_unit_actions(dctx,*unit);