diff --git a/photon/libc/sys/magenta/fio.c b/photon/libc/sys/magenta/fio.c
index ca76276..4eb0344 100644
--- a/photon/libc/sys/magenta/fio.c
+++ b/photon/libc/sys/magenta/fio.c
@@ -50,32 +50,17 @@ void __fio_init(mx_handle_t in, mx_handle_t out, mx_handle_t err)
 
 int __fio_fopen(const char *path, const char *mode, struct __io_file *fp)
 {
-    mx_handle_t h = MX_NULL_HANDLE;
-    mx_flags_t flags = flags_from_mode(mode);
-    mx_status_t stat = mx_file_open(MX_NULL_HANDLE, path, flags, &h);
-
-    if (stat != MX_OK) {
-        return -1;
-    }
-
-    fp->handle = h;
-    return 0;
+    return -1;
 }
 
 int __fio_fclose(struct __io_file *fp)
 {
-    if (mx_handle_close(fp->handle) != MX_OK) {
-        return -1;
-    }
-
-    return 0;
+    return -1;
 }
 
 int __fio_fdopen(mx_handle_t fd, const char *mode, struct __io_file *fp)
 {
-    /* TODO validate handle and mode */
-    fp->handle = fd;
-    return 0;
+    return -1;
 }
 
 int __fileno(struct __io_file *f)
@@ -85,69 +70,22 @@ int __fileno(struct __io_file *f)
 
 unsigned int __fio_read(struct __io_file *f, char *buf, unsigned int sz)
 {
-    if (!sz) {
-        return 0;
-    }
-
-    size_t i = 0;
-    unsigned long real_sz = 0;
-
-    if (f->unget) {
-        buf[i++] = f->unget;
-        f->unget = 0;
-        sz--;
-    }
-
-    if (!sz) {
-        return real_sz;
-    }
-
-    mx_status_t err = mx_object_read(f->handle, sz, buf + i, &real_sz);
-
-    if (err != MX_OK || real_sz != sz) {
-        f->err = 1;
-    }
-
-    return real_sz + i;
+    return 0;
 }
 
 unsigned int __fio_write(struct __io_file *f, const char *buf, unsigned int sz)
 {
-    for (unsigned int i = 0; i < sz; i++) {
-        if (f->buf_idx >= __FIO_BUFSZ) {
-            __fio_flush(f);
-        }
-
-        f->buf[f->buf_idx++] = buf[i];
-        if (buf[i] == '\n') {
-            __fio_flush(f);
-        }
-    }
-
-    return sz;
+    return 0;
 }
 
 int __fio_ungetc(struct __io_file *f, char c)
 {
-    if (f->unget) {
-        return -1;
-    }
-
-    f->unget = c;
     return 0;
 }
 
 unsigned int __fio_flush(struct __io_file *f)
 {
-    unsigned long written = 0;
-    mx_status_t ret = mx_object_write(f->handle, f->buf_idx, f->buf, &written);
-    if (ret != MX_OK || written != f->buf_idx) {
-        f->err = 1;
-    }
-
-    size_t flushed = f->buf_idx;
-    f->buf_idx = 0;
-    return flushed;
+    return 0;
 }
 
 int __fio_error(struct __io_file *f)