Allow the usage of MSG_NOSIGNAL in send functions

That introduces the GNUTLS_NO_SIGNAL flag for gnutls_init(),
which is available in systems that support the MSG_NOSIGNAL
flag to send(). That eases the usage of the library within
other libraries.
Resolves #11

1 files changed, 16 insertions, 1 deletions

diff --git a/lib/system.c b/lib/system.c
index d336b529b1..f12dbfc2f3 100644
--- a/lib/system.c
+++ b/lib/system.c
@@ -110,16 +110,31 @@ int system_errno(gnutls_transport_ptr_t ptr)
 	return errno;
 }
 
+#ifdef MSG_NOSIGNAL
+ssize_t
+system_writev_nosignal(gnutls_transport_ptr_t ptr, const giovec_t * iovec,
+	      int iovec_cnt)
+{
+	struct msghdr hdr;
+
+	memset(&hdr, 0, sizeof(hdr));
+	hdr.msg_iov = (struct iovec *)iovec;
+	hdr.msg_iovlen = iovec_cnt;
+
+	return sendmsg(GNUTLS_POINTER_TO_INT(ptr), &hdr, MSG_NOSIGNAL);
+}
+#endif
+
 ssize_t
 system_writev(gnutls_transport_ptr_t ptr, const giovec_t * iovec,
 	      int iovec_cnt)
 {
 	return writev(GNUTLS_POINTER_TO_INT(ptr), (struct iovec *) iovec,
 		      iovec_cnt);
-
 }
 #endif
 
+
 ssize_t
 system_read(gnutls_transport_ptr_t ptr, void *data, size_t data_size)
 {