Add CLIS_COMMS errno (400) and return an error text as well.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@729 d4fa192b-c00b-0410-8231-f00ffab90ce4

include/cli.h

@@ -179,7 +179,8 @@ enum cli_status_e {
 	CLIS_TOOMANY	= 105,
 	CLIS_PARAM	= 106,
 	CLIS_OK		= 200,
-	CLIS_CANT	= 300
+	CLIS_CANT	= 300,
+	CLIS_COMMS	= 400
 };
 
 /* Length of first line of response */

lib/libvarnish/cli_common.c

@@ -110,6 +110,8 @@ cli_readres(int fd, unsigned *status, char **ptr, double tmo)
 	if (i != CLI_LINE0_LEN) {
 		if (status != NULL)
 			*status = CLIS_COMMS;
+		if (ptr != NULL)
+			*ptr = strdup("CLI communication error");
 		return (1);
 	}
 	assert(i == CLI_LINE0_LEN);