The unix(7) man page recommends using SOCK_SEQPACKET

Since Linux 2.6.4 the SOCK_SEQPACKET socket type is available for UNIX
domain sockets on Linux.  It is intended for; "a sequenced-packet socket
that is connection-oriented, preserves message boundaries, and delivers
messages in the order that they were sent." which sounds like us.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

src/api.c

@@ -444,7 +444,7 @@ int api_init(uev_ctx_t *ctx)
 	};
 
 	_d("Setting up external API socket ...");
-	sd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
+	sd = socket(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0);
 	if (-1 == sd) {
 		_pe("Failed starting external API socket");
 		return 1;

src/client.c

@@ -38,7 +38,7 @@ int client_connect(void)
 		.sun_path   = INIT_SOCKET,
 	};
 
-	sd = socket(AF_UNIX, SOCK_STREAM, 0);
+	sd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
 	if (-1 == sd)
 		err(1, "Failed creating UNIX domain socket");