File IO embryo.

1 files changed, 20 insertions, 3 deletions

diff --git a/os/src/fstat.c b/os/src/fstat.c
index a756206..b10194c 100644
--- a/os/src/fstat.c
+++ b/os/src/fstat.c
@@ -1,8 +1,25 @@
 #include <reent.h>
 #include <sys/stat.h>
-#include "osdebug.h"
+#include <string.h>
+#include <errno.h>
+#include "fio.h"
+
+int _fstat_r(struct _reent * reent, int fd, struct stat * buf) {
+    off_t c;
+    memset(buf, 0, sizeof(struct stat));
+    
+    if (!fio_is_open(fd)) {
+        reent->_errno = EBADF;
+        return -1;
+    }
+    
+    buf->st_mode = S_IFCHR;
+    buf->st_blksize = 1024;
+    c = fio_seek(fd, 0, SEEK_CUR);
+    if (c >= 0) {
+        buf->st_size = fio_seek(fd, 0, SEEK_END);
+        fio_seek(fd, c, SEEK_SET);
+    }
 
-int _fstat_r(struct _reent * ptr, int fildes, struct stat * buf) {
-    DBGOUT("_fstat_r(%p, %d, %p)\r\n", ptr, fildes, buf);
     return 0;
 }