From 90a38ea8103504f4bdb816ee9aa0b26349e7e72b Mon Sep 17 00:00:00 2001
From: Oswald Buddenhagen <ossi@users.sf.net>
Date: Mon, 5 Apr 2010 13:15:57 +0200
Subject: [PATCH] assert valid file handles

i've seen error logs of the type
  SSL_write: Bad file descriptor
and i simply can't nail it, so go for some more drastic measures.
---
 src/drv_imap.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/drv_imap.c b/src/drv_imap.c
index f417385..7ddf81e 100644
--- a/src/drv_imap.c
+++ b/src/drv_imap.c
@@ -384,7 +384,10 @@ socket_perror( const char *func, Socket_t *sock, int ret )
 static int
 socket_read( Socket_t *sock, char *buf, int len )
 {
-	int n =
+	int n;
+
+	assert( sock->fd >= 0 );
+	n =
 #if HAVE_LIBSSL
 		sock->use_ssl ? SSL_read( sock->ssl, buf, len ) :
 #endif
@@ -400,7 +403,10 @@ socket_read( Socket_t *sock, char *buf, int len )
 static int
 socket_write( Socket_t *sock, char *buf, int len )
 {
-	int n =
+	int n;
+
+	assert( sock->fd >= 0 );
+	n =
 #if HAVE_LIBSSL
 		sock->use_ssl ? SSL_write( sock->ssl, buf, len ) :
 #endif