From b85b1f5d35413312c08e7670dd4db67b7e088d91 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Aug 30 2019 03:02:03 +0000
Subject: glue layer: introduced <sys/cmd.h>, implemented associated interfaces.


---

diff --git a/include/sys/cmd.h b/include/sys/cmd.h
new file mode 100644
index 0000000..eb3cbfc
--- /dev/null
+++ b/include/sys/cmd.h
@@ -0,0 +1,45 @@
+#ifndef _SYS_CMD_H
+#define _SYS_CMD_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define __NEED_size_t
+
+#include <bits/alltypes.h>
+
+/***************************************************************************/
+/* int (*cmd_args_to_argv)(                                                */
+/*      const char * args,                                                 */
+/*      char * argbuf, size_t buflen,                                      */
+/*      char ** argv, size_t nptrs);                                       */
+/*                                                                         */
+/* arguments:                                                              */
+/*   args:       command to parse                                          */
+/*   argbuf:     buffer to receive the corresponding sequence of           */
+/*                 null-terminated arguments.                              */
+/*   buflen:     size of argbuf, including final null-terminator.          */
+/*   argv:       argument vector to receive pointers to the above          */
+/*                 null-terminated arguments.                              */
+/*   nptrs:      number of available argv pointers, including              */
+/*                 including the terminating null pointer.                 */
+/*                                                                         */
+/* return value:                                                           */
+/*   zero upon successful parsing and buffer initialization                */
+/*   negative value returned upon failure, which is the actual value       */
+/*     returned by the underlying system call; accordingly, errno          */
+/*     is _not_ set by the above interface.                                */
+/*                                                                         */
+/* implementation:                                                         */
+/*   the above interface is async-safe, thread-safe, and re-entrant.       */
+/*                                                                         */
+/***************************************************************************/
+
+int __cmd_args_to_argv(const char *, char *, size_t, char **, size_t);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/project/arch.mk b/project/arch.mk
index 5a5b967..5203888 100644
--- a/project/arch.mk
+++ b/project/arch.mk
@@ -23,6 +23,7 @@ LDFLAGS_CONFIG += -Wl,--exclude-symbols=_IO_putc_unlocked
 LDFLAGS_CONFIG += -Wl,--exclude-symbols=___errno_location
 
 TARGET_SYS_HEADERS = \
+	$(PROJECT_DIR)/include/sys/cmd.h \
 	$(PROJECT_DIR)/include/sys/debug.h \
 	$(PROJECT_DIR)/include/sys/fs.h \
 	$(PROJECT_DIR)/include/sys/ldso.h \
diff --git a/src/arch/nt32/cmd.c b/src/arch/nt32/cmd.c
new file mode 100644
index 0000000..a5def88
--- /dev/null
+++ b/src/arch/nt32/cmd.c
@@ -0,0 +1,10 @@
+#include <sys/cmd.h>
+#include "syscall.h"
+
+int __cmd_args_to_argv(
+	const char * args,
+	char * argbuf, size_t buflen,
+	char ** argv, size_t nptrs)
+{
+	return __syscall(SYS_cmd_args_to_argv,args,argbuf,buflen,argv,nptrs);
+}
diff --git a/src/arch/nt64/cmd.c b/src/arch/nt64/cmd.c
new file mode 100644
index 0000000..a5def88
--- /dev/null
+++ b/src/arch/nt64/cmd.c
@@ -0,0 +1,10 @@
+#include <sys/cmd.h>
+#include "syscall.h"
+
+int __cmd_args_to_argv(
+	const char * args,
+	char * argbuf, size_t buflen,
+	char ** argv, size_t nptrs)
+{
+	return __syscall(SYS_cmd_args_to_argv,args,argbuf,buflen,argv,nptrs);
+}