From cb9ef7814ecbe51c70912e4ca6672804306e171d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Gr=C3=A9goire?= <lectem@gmail.com>
Date: Mon, 20 Apr 2026 18:05:31 +0200
Subject: [PATCH] Use ReadFile and atoi

---
 public/client/TracySysTrace.cpp | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/public/client/TracySysTrace.cpp b/public/client/TracySysTrace.cpp
index c9dd2a38..4ae641aa 100644
--- a/public/client/TracySysTrace.cpp
+++ b/public/client/TracySysTrace.cpp
@@ -657,16 +657,15 @@ bool SysTraceStart( int64_t& samplingPeriod )
     int samplingFrequency = GetSamplingFrequency();
     if( samplingFrequency > 0 )
     {
-        FILE* f = fopen( "/proc/sys/kernel/perf_event_max_sample_rate", "r" );
-        if( f )
+        const auto maxSampleRateStr = ReadFile( "/proc/sys/kernel/perf_event_max_sample_rate" );
+        if( maxSampleRateStr )
         {
-            int sysMax;
-            if( fscanf( f, "%d", &sysMax ) == 1 && samplingFrequency > sysMax )
+            const int sysMax = atoi( maxSampleRateStr );
+            if( sysMax > 0 && sysMax < samplingFrequency )
             {
                 TracyDebug( "Requested sampling frequency %d Hz is higher than system maximum of %d Hz, reducing to system maximum.", samplingFrequency, sysMax );
                 samplingFrequency = sysMax;
             }
-            fclose( f );
         }
     }
     samplingPeriod = SamplingFrequencyToPeriodNs( samplingFrequency );