From e1f10b268ae40cbc969934f8e57aa6d892f631e6 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Aug 25 2019 23:02:27 +0000
Subject: glue layer: introduced <sys/fs.h>, implemented associated interfaces.


---

diff --git a/include/sys/fs.h b/include/sys/fs.h
new file mode 100644
index 0000000..f0dd33b
--- /dev/null
+++ b/include/sys/fs.h
@@ -0,0 +1,51 @@
+#ifndef _SYS_FS_H
+#define _SYS_FS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define __NEED_size_t
+
+#include <bits/alltypes.h>
+
+/***************************************************************************/
+/* int (*__fs_path_fn)(int fdat, const char * path, int options,           */
+/*      char * buffer, size_t buflen);                                     */
+/*                                                                         */
+/* resolve and obtain the full path using one of four supported notations: */
+/*                                                                         */
+/* __fs_rpath(): root-relative notation (e.g. /bar)                        */
+/* __fs_apath(): root-based absolute notation (e.g. /dev/fs/c/foo/bar)     */
+/* __fs_npath(): native tool notation (e.g. C:\foo\bar)                    */
+/* __fs_dpath(): native driver notation (e.g. \Device\Harddisk0\foo\bar    */
+/*                                                                         */
+/* arguments:                                                              */
+/*   fdat:       open at file descriptor                                   */
+/*   path:       path to resolve, absolute or relative                     */
+/*   options:    options to be passed to the internal path resolution      */
+/*                 interface, for instance O_DIRECTORY|O_NOFOLLOW          */
+/*   buffer:     buffer to receive the fully resolved path                 */
+/*   buflen:     size of buffer, including null termination.               */
+/*                                                                         */
+/* return value:                                                           */
+/*   zero upon successful resolution 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 any of the above interfaces.                        */
+/*                                                                         */
+/* implementation:                                                         */
+/*   the above interfaces are async-safe, thread-safe, and re-entrant.     */
+/*                                                                         */
+/***************************************************************************/
+
+int __fs_rpath(int, const char *, int, char *, size_t);
+int __fs_apath(int, const char *, int, char *, size_t);
+int __fs_npath(int, const char *, int, char *, size_t);
+int __fs_dpath(int, const char *, int, char *, size_t);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/project/arch.mk b/project/arch.mk
index 858c1f0..5a5b967 100644
--- a/project/arch.mk
+++ b/project/arch.mk
@@ -24,6 +24,7 @@ LDFLAGS_CONFIG += -Wl,--exclude-symbols=___errno_location
 
 TARGET_SYS_HEADERS = \
 	$(PROJECT_DIR)/include/sys/debug.h \
+	$(PROJECT_DIR)/include/sys/fs.h \
 	$(PROJECT_DIR)/include/sys/ldso.h \
 	$(PROJECT_DIR)/include/sys/unwind.h \
 
diff --git a/src/arch/nt32/fs.c b/src/arch/nt32/fs.c
new file mode 100644
index 0000000..b198777
--- /dev/null
+++ b/src/arch/nt32/fs.c
@@ -0,0 +1,26 @@
+#include <sys/fs.h>
+#include "syscall.h"
+
+int __fs_rpath(int fdat, const char * path, int options,
+		char * buffer, size_t buflen)
+{
+	return __syscall(SYS_fs_rpath,fdat,path,options,buffer,buflen);
+}
+
+int __fs_apath(int fdat, const char * path, int options,
+		char * buffer, size_t buflen)
+{
+	return __syscall(SYS_fs_apath,fdat,path,options,buffer,buflen);
+}
+
+int __fs_npath(int fdat, const char * path, int options,
+		char * buffer, size_t buflen)
+{
+	return __syscall(SYS_fs_npath,fdat,path,options,buffer,buflen);
+}
+
+int __fs_dpath(int fdat, const char * path, int options,
+		char * buffer, size_t buflen)
+{
+	return __syscall(SYS_fs_dpath,fdat,path,options,buffer,buflen);
+}
diff --git a/src/arch/nt64/fs.c b/src/arch/nt64/fs.c
new file mode 100644
index 0000000..b198777
--- /dev/null
+++ b/src/arch/nt64/fs.c
@@ -0,0 +1,26 @@
+#include <sys/fs.h>
+#include "syscall.h"
+
+int __fs_rpath(int fdat, const char * path, int options,
+		char * buffer, size_t buflen)
+{
+	return __syscall(SYS_fs_rpath,fdat,path,options,buffer,buflen);
+}
+
+int __fs_apath(int fdat, const char * path, int options,
+		char * buffer, size_t buflen)
+{
+	return __syscall(SYS_fs_apath,fdat,path,options,buffer,buflen);
+}
+
+int __fs_npath(int fdat, const char * path, int options,
+		char * buffer, size_t buflen)
+{
+	return __syscall(SYS_fs_npath,fdat,path,options,buffer,buflen);
+}
+
+int __fs_dpath(int fdat, const char * path, int options,
+		char * buffer, size_t buflen)
+{
+	return __syscall(SYS_fs_dpath,fdat,path,options,buffer,buflen);
+}