https://bugs.gentoo.org/777423

--- a/src/plugins/libovh.c
+++ b/src/plugins/libovh.c
@@ -181,6 +181,7 @@
 
 	char *b64user;
 	char message[BUFLEN];
+	size_t pos, towrite;
 
 	if(strlen(args->login) > 128) {
 		ret_msg(NONE, "username is too long");
@@ -220,10 +221,18 @@
 		    "\n--------------------------------------\n"
 		    "%s--------------------------------------\n\n",
                     message);
-	
-	if(write(s, message, strlen(message)) == -1) {
-		ret_msg(PERR, "write() failed");
-		return RET_WARNING;
+
+	for (pos = 0, towrite = strlen(message); towrite > 0; ) {
+		ssize_t ret;
+
+		ret = write(s, message + pos, towrite - pos);
+		if(ret <= 0) {
+			ret_msg(PERR, "write() failed");
+			return RET_WARNING;
+		}
+
+		pos += ret;
+		towrite -= ret;
 	}
 
 	free(b64user);
@@ -236,13 +245,22 @@
 {
 
 	int n;
-	char server_msg[BUFSIZE], *ptr;
+	char server_msg[BUFLEN], *ptr;
 
 	/* get server_msg */
 	(void)memset(server_msg, 0, sizeof(server_msg));
-	if(read(s, server_msg, sizeof(server_msg) - 1) < 0) {
-		ret_msg(PERR, "read() failed");
-		return RET_WARNING;
+
+	for (ptr = server_msg; ptr < &server_msg[BUFLEN]; ) {
+		ssize_t ret;
+
+		ret = read(s, ptr, &server_msg[BUFLEN] - ptr);
+		if (ret < 0) {
+			ret_msg(PERR, "read() failed");
+			return RET_WARNING;
+		} else if (ret == 0)
+			break;
+
+		ptr += ret;
 	}
 
 	print_debug("\n\nServer message:"
@@ -267,6 +285,7 @@
 				}
 			}
 		}
+		ret_msg(NONE, "unknown server response");
 	} else if(strstr(server_msg, "401 Authorization Required")) {
 		ret_msg(NONE, "wrong username or password");
 	} else {