From 9924dc4684573e88baa0de61fbd892768c6f135d Mon Sep 17 00:00:00 2001
From: Lephe <sebastien.michelland@protonmail.com>
Date: Mon, 22 Aug 2022 15:25:14 +0200
Subject: [PATCH] fs: add rename() function on fx-CG

---
 CMakeLists.txt              |  2 ++
 include/gint/bfile.h        |  3 +++
 src/fs/fugue/fugue.h        |  2 ++
 src/fs/fugue/fugue_rename.c | 38 +++++++++++++++++++++++++++++++++++++
 src/fs/rename.c             |  8 ++++++++
 src/kernel/syscalls.S       |  3 +++
 6 files changed, 56 insertions(+)
 create mode 100644 src/fs/fugue/fugue_rename.c
 create mode 100644 src/fs/rename.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 71869e0..1b9fe08 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,6 +50,7 @@ set(SOURCES_COMMON
   src/fs/pwrite.c
   src/fs/read.c
   src/fs/readdir.c
+  src/fs/rename.c
   src/fs/rewinddir.c
   src/fs/rmdir.c
   src/fs/seekdir.c
@@ -64,6 +65,7 @@ set(SOURCES_COMMON
   src/fs/fugue/fugue_open.c
   src/fs/fugue/fugue_mkdir.c
   src/fs/fugue/fugue_stat.c
+  src/fs/fugue/fugue_rename.c
   src/fs/fugue/fugue_rmdir.c
   src/fs/fugue/fugue_unlink.c
   src/fs/fugue/util.c
diff --git a/include/gint/bfile.h b/include/gint/bfile.h
index 9008c6c..fecab0e 100644
--- a/include/gint/bfile.h
+++ b/include/gint/bfile.h
@@ -73,6 +73,9 @@ extern "C" {
 /* Remove a file or folder (also works if the entry does not exist). */
 int BFile_Remove(uint16_t const *path);
 
+/* Rename a file (can move folders; Fugue only). */
+int BFile_Rename(uint16_t const *oldpath, uint16_t const *newpath);
+
 #define BFile_File    1
 #define BFile_Folder  5
 
diff --git a/src/fs/fugue/fugue.h b/src/fs/fugue/fugue.h
index 1a4d4d8..54e659c 100644
--- a/src/fs/fugue/fugue.h
+++ b/src/fs/fugue/fugue.h
@@ -25,6 +25,8 @@ int fugue_open(char const *path, int flags, mode_t mode);
 
 int fugue_unlink(char const *path);
 
+int fugue_rename(char const *oldpath, char const *newpath);
+
 int fugue_mkdir(char const *path, mode_t mode);
 
 int fugue_rmdir(char const *path);
diff --git a/src/fs/fugue/fugue_rename.c b/src/fs/fugue/fugue_rename.c
new file mode 100644
index 0000000..6eaded6
--- /dev/null
+++ b/src/fs/fugue/fugue_rename.c
@@ -0,0 +1,38 @@
+#include <gint/hardware.h>
+#include <gint/bfile.h>
+#include <gint/fs.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include "util.h"
+
+int fugue_rename(char const *oldpath, char const *newpath)
+{
+	ENOTSUP_IF_NOT_FUGUE(-1);
+	int rc = -1;
+
+	uint16_t *fcpath_1 = NULL;
+	uint16_t *fcpath_2 = NULL;
+
+	fcpath_1 = fs_path_normalize_fc(oldpath);
+	if(!fcpath_1) {
+		errno = ENOMEM;
+		goto end;
+	}
+	fcpath_2 = fs_path_normalize_fc(newpath);
+	if(!fcpath_2) {
+		errno = ENOMEM;
+		goto end;
+	}
+
+	rc = BFile_Rename(fcpath_1, fcpath_2);
+	if(rc < 0) {
+		errno = bfile_error_to_errno(rc);
+		rc = -1;
+	}
+	else rc = 0;
+
+end:
+	free(fcpath_1);
+	free(fcpath_2);
+	return rc;
+}
diff --git a/src/fs/rename.c b/src/fs/rename.c
new file mode 100644
index 0000000..3c20b88
--- /dev/null
+++ b/src/fs/rename.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include "fugue/fugue.h"
+
+int rename(char const *oldpath, char const *newpath)
+{
+	/* Standard rename() is the Fugue filesystem only */
+	return fugue_rename(oldpath, newpath);
+}
diff --git a/src/kernel/syscalls.S b/src/kernel/syscalls.S
index 7a489d4..12b0325 100644
--- a/src/kernel/syscalls.S
+++ b/src/kernel/syscalls.S
@@ -19,6 +19,7 @@
 
 /* Bfile driver */
 .global	_BFile_Remove
+.global	_BFile_Rename
 .global	_BFile_Create
 .global	_BFile_Open
 .global	_BFile_Close
@@ -131,6 +132,8 @@ ___realloc:
 
 _BFile_Remove:
 	syscall(0x1db4)
+_BFile_Rename:
+	syscall(0x1db3)
 _BFile_Create:
 	syscall(0x1dae)
 _BFile_Open: