add basic support for custom devices.

Author: ITotalJustice

src/platform/nx/main.c

@@ -186,7 +186,7 @@ int main(int argc, char** argv) {
         return error_loop("failed to get current ip address");
     }
 
-    vfs_nx_init(mount_devices, save_writable, mount_bis);
+    vfs_nx_init(NULL, mount_devices, save_writable, mount_bis);
 
     const struct in_addr addr = {ip};
     printf(TEXT_YELLOW "ip: %s\n", inet_ntoa(addr));

src/platform/nx/main_sysmod.c

@@ -70,7 +70,7 @@ int main(void) {
         return EXIT_FAILURE;
     }
 
-    vfs_nx_init(mount_devices, save_writable, mount_bis);
+    vfs_nx_init(NULL, mount_devices, save_writable, mount_bis);
 
     int timeout = -1;
     if (g_ftpsrv_config.timeout) {

src/platform/nx/vfs_nx.c

@@ -39,6 +39,7 @@ static const FtpVfs* g_vfs[] = {
     [VFS_TYPE_STDIO] = &g_vfs_stdio,
     [VFS_TYPE_HDD] = &g_vfs_hdd,
 #endif
+    [VFS_TYPE_USER] = NULL,
 };
 
 static bool is_path(const char* path, const char* name) {
@@ -275,10 +276,9 @@ static const struct MountEntry BIS_NAMES[] = {
     { "bis_system", FsBisPartitionId_System },
 };
 
-void vfs_nx_init(bool enable_devices, bool save_writable, bool mount_bis) {
+void vfs_nx_init(const struct VfsNxCustomPath* custom, bool enable_devices, bool save_writable, bool mount_bis) {
     g_enabled_devices = enable_devices;
     if (g_enabled_devices) {
-
         // sorted based on most common
         const NcmStorageId ids[NCM_SIZE] = {
             NcmStorageId_SdCard,
@@ -383,6 +383,11 @@ void vfs_nx_init(bool enable_devices, bool save_writable, bool mount_bis) {
             vfs_nx_add_device("hdd", VFS_TYPE_HDD);
         }
 #endif
+        if (custom) {
+            vfs_nx_add_device(custom->name, VFS_TYPE_USER);
+            g_vfs[VFS_TYPE_USER] = custom->func;
+        }
+
         vfs_root_init(g_device, &g_device_count);
 
         u64 LanguageCode;

src/platform/nx/vfs_nx.h

@@ -46,6 +46,7 @@ enum VFS_TYPE {
     VFS_TYPE_STDIO, // used for romfs and hdd
     VFS_TYPE_HDD, // list hdd, uses unistd
 #endif
+    VFS_TYPE_USER,
 };
 
 struct FtpVfsFile {
@@ -66,6 +67,7 @@ struct FtpVfsFile {
         struct VfsStdioFile stdio;
         struct VfsHddFile usbhsfs;
 #endif
+        void* user;
     };
 };
 
@@ -87,6 +89,7 @@ struct FtpVfsDir {
         struct VfsStdioDir stdio;
         struct VfsHddDir usbhsfs;
 #endif
+        void* user;
     };
 };
 
@@ -140,7 +143,14 @@ typedef struct FtpVfs {
     int (*rename)(const char* src, const char* dst);
 } FtpVfs;
 
-void vfs_nx_init(bool enable_devices, bool save_writable, bool mount_bis);
+
+struct VfsNxCustomPath {
+    const char* name;
+    void* user;
+    FtpVfs* func;
+};
+
+void vfs_nx_init(const struct VfsNxCustomPath* custom, bool enable_devices, bool save_writable, bool mount_bis);
 void vfs_nx_exit(void);
 void vfs_nx_add_device(const char* name, enum VFS_TYPE type);