Add read/write syscalls again

include/sys/fs/ofile.h

@@ -2,6 +2,10 @@
 #include "node.h"
 #include <sys/types.h>
 
+#define OF_WRITABLE         (1 << 0)
+#define OF_READABLE         (1 << 1)
+#define OF_DIRECTORY        (1 << 2)
+
 struct ofile {
     int flags;
     struct vnode *vnode;

include/sys/fs/vfs.h

@@ -28,9 +28,11 @@ int vfs_link_resolve(struct vfs_ioctx *ctx, struct vnode *lnk, struct vnode **re
 int vfs_find(struct vfs_ioctx *ctx, struct vnode *rel, const char *path, struct vnode **node);
 int vfs_mount(struct vfs_ioctx *ctx, const char *at, void *blk, const char *fs, const char *opt);
 
+int vfs_open_vnode(struct vfs_ioctx *ctx, struct ofile *fd, struct vnode *node, int opt);
 int vfs_open(struct vfs_ioctx *ctx, struct ofile *fd, const char *path, int flags, int mode);
 void vfs_close(struct vfs_ioctx *ctx, struct ofile *fd);
 
 int vfs_stat(struct vfs_ioctx *ctx, const char *path, struct stat *st);
 
+ssize_t vfs_write(struct vfs_ioctx *ctx, struct ofile *fd, const void *buf, size_t count);
 ssize_t vfs_read(struct vfs_ioctx *ctx, struct ofile *fd, void *buf, size_t count);

include/sys/thread.h

@@ -16,8 +16,6 @@
 #define THREAD_STOPPED      (1 << 2)
 
 // Thread init flags:
-// Initialize I/O context and open stdio
-#define THREAD_INIT_IOCTX   (1 << 1)
 // Initialize platform context
 #define THREAD_INIT_CTX     (1 << 0)
 
@@ -26,6 +24,8 @@ typedef uint64_t *mm_space_t;
 #include "sys/amd64/sys/thread.h"
 #endif
 
+#define THREAD_MAX_FDS      16
+
 struct image_info {
     uintptr_t image_end;
     uintptr_t brk;
@@ -47,7 +47,7 @@ struct thread {
     int exit_code;
 
     struct vfs_ioctx ioctx;
-    struct ofile fds[4];
+    struct ofile *fds[THREAD_MAX_FDS];
 
     // Signals
     uint32_t sigq;