[src/trunk]: src/sys/arch/i386/stand/lib PR 50516 bad switch statement.

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f3ba5be8dabc
branches:  trunk
changeset: 812325:f3ba5be8dabc
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Fri Dec 11 08:04:20 2015 +0000

description:
PR 50516 bad switch statement.
Adding some comments.

diffstat:

 sys/arch/i386/stand/lib/dosfile.c |  20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)

diffs (39 lines):

diff -r 6dcf5c61e3ef -r f3ba5be8dabc sys/arch/i386/stand/lib/dosfile.c
--- a/sys/arch/i386/stand/lib/dosfile.c Fri Dec 11 07:59:14 2015 +0000
+++ b/sys/arch/i386/stand/lib/dosfile.c Fri Dec 11 08:04:20 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dosfile.c,v 1.16 2013/10/20 21:06:37 christos Exp $     */
+/*     $NetBSD: dosfile.c,v 1.17 2015/12/11 08:04:20 mlelstv Exp $      */
 
 /*
  * Copyright (c) 1996
@@ -56,18 +56,22 @@
        int err;
 
        switch (doserrno) {
-           case 1:
-           case 4:
-           case 12:
+           case 1: /* invalid function number */
+           case 4: /* too many open files */
+           case 12: /* invalid access mode */
            default:
                err = EIO;
-           case 2:
-           case 3:
+               break;
+           case 2: /* file not found */
+           case 3: /* path not found */
                err = ENOENT;
-           case 5:
+               break;
+           case 5: /* access denied */
                err = EPERM;
-           case 6:
+               break;
+           case 6: /* invalid handle */
                err = EINVAL;
+               break;
        }
        return err;
 }