From b8bb1c78ae85498cf4ed987721670612437ada2e Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Wed, 15 May 2024 22:16:36 +0200
Subject: [PATCH] Rewrite slack_get_is_localtime with ifstreams

---
 slack-timedate.cpp | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/slack-timedate.cpp b/slack-timedate.cpp
index 607736f..3f8b2d8 100644
--- a/slack-timedate.cpp
+++ b/slack-timedate.cpp
@@ -16,7 +16,9 @@
  *
  */
 
+#include <cstring>
 #include <filesystem>
+#include <fstream>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -215,24 +217,26 @@ gboolean slack_set_time(gint64 seconds_since_epoch, gboolean relative)
     return clock_settime (CLOCK_REALTIME, &ts) == 0;
 }
 
-gboolean slack_get_is_localtime () {
-	FILE *fh;
-	char time_str[10]; // "localtime" is longer than "UTC" and has 9 letters + \0
-	gboolean is_localtime;
+gboolean slack_get_is_localtime()
+{
+    std::ifstream fh{ "/etc/hardwareclock", std::ios::in };
+    if (!fh.is_open())
+    {
+        return false;
+    }
+    std::array<char, 10> time_str; // "localtime" is longer than "UTC" and has 9 letters + \0
 
-	is_localtime = FALSE;
+    while (fh.good())
+    {
+        fh.getline(time_str.data(), time_str.size());
+        fh.clear(fh.rdstate() & (~std::ios_base::failbit));
 
-	fh = fopen ("/etc/hardwareclock", "r");
-	if (fh == NULL) return FALSE;
-	while (fgets (time_str, 10, fh)) {
-		if (!g_strcmp0 (time_str, "localtime")) {
-			is_localtime = TRUE;
-			break;
-		}
-	}
-
-	fclose (fh);
-	return is_localtime;
+        if (std::strncmp(time_str.data(), "localtime", time_str.size()) == 0)
+        {
+            return true;
+        }
+    }
+    return false;
 }
 
 gboolean slack_get_ntp()