From 9ca1ac62f9aa6e01afb3697cc4b966d085be9d3a Mon Sep 17 00:00:00 2001
From: SiIky <siiky@users.noreply.github.com>
Date: Sat, 17 Feb 2018 18:08:27 +0000
Subject: [PATCH] Print unknown_str in case of error

func can return NULL in case of error, but no checking is done when
printing, and unknown_str wasn't being used anywhere.
---
 slstatus.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/slstatus.c b/slstatus.c
index 89a3268..19bc127 100644
--- a/slstatus.c
+++ b/slstatus.c
@@ -87,8 +87,10 @@ main(int argc, char *argv[])
 
 		status[0] = '\0';
 		for (i = len = 0; i < LEN(args); i++) {
+			const char * res = args[i].func(args[i].args);
+			res = (res == NULL) ? unknown_str : res;
 			len += snprintf(status + len, sizeof(status) - len,
-			                args[i].fmt, args[i].func(args[i].args));
+			                args[i].fmt, res);
 
 			if (len >= sizeof(status)) {
 				status[sizeof(status) - 1] = '\0';