From adbe4eddf918b7b617eb5bd4dda1435d5402b2c4 Mon Sep 17 00:00:00 2001
From: Heikki Hannikainen <hessuh@rockbox.org>
Date: Sat, 24 Aug 2002 09:47:54 +0000
Subject: Make close() check for a valid fd and set errno accordingly.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1965 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/common/file.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'firmware/common/file.c')

diff --git a/firmware/common/file.c b/firmware/common/file.c
index c5f4cd5f5e..2c00c3e3f6 100644
--- a/firmware/common/file.c
+++ b/firmware/common/file.c
@@ -122,6 +122,14 @@ int open(char* pathname, int flags)
 
 int close(int fd)
 {
+    if (fd < 0 || fd > MAX_OPEN_FILES-1) {
+        errno = EINVAL;
+        return -1;
+    }
+    if (!openfiles[fd].busy) {
+        errno = EBADF;
+        return -1;
+    }
     openfiles[fd].busy = false;
     return 0;
 }
-- 
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