[src/trunk]: src/etc check if vi recovery files are regular files before tryi...

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

details:   https://anonhg.NetBSD.org/src/rev/586123146217
branches:  trunk
changeset: 475864:586123146217
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Aug 28 03:39:59 1999 +0000

description:
check if vi recovery files are regular files before trying to e-mail them.
Stops a denial of service attack where the user can put a named pipe or
any other device that blocks i/o in /var/tmp/vi.recover/recover.*
[from dynamo%ime.net@localhost]

diffstat:

 etc/rc |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (20 lines):

diff -r 97dd5ecbcd10 -r 586123146217 etc/rc
--- a/etc/rc    Sat Aug 28 01:32:33 1999 +0000
+++ b/etc/rc    Sat Aug 28 03:39:59 1999 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: rc,v 1.128 1999/08/05 20:51:57 christos Exp $
+#      $NetBSD: rc,v 1.129 1999/08/28 03:39:59 christos Exp $
 #      originally from: @(#)rc 8.2 (Berkeley) 3/17/94
 
 # System startup script run by init on autoboot
@@ -345,7 +345,9 @@
 if [ "$virecovery" != "/var/tmp/vi.recover/recover.*" ]; then
        echo preserving editor files
        for i in $virecovery; do
-               sendmail -t < $i
+               if [ -f $i ]; then
+                       sendmail -t < $i
+               fi
        done
 fi