From 3a4401a6b899694d25b5ac89c8068e45711bab36 Mon Sep 17 00:00:00 2001
From: practicalswift <practicalswift@users.noreply.github.com>
Date: Tue, 29 Aug 2017 20:06:30 +0200
Subject: [PATCH] [Qt] Terminate string *pszExePath after readlink and without
 using memset

---
 src/qt/guiutil.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index f3c5daebe..6d3ee5cb2 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -743,9 +743,10 @@ bool SetStartOnSystemStartup(bool fAutoStart)
     else
     {
         char pszExePath[MAX_PATH+1];
-        memset(pszExePath, 0, sizeof(pszExePath));
-        if (readlink("/proc/self/exe", pszExePath, sizeof(pszExePath)-1) == -1)
+        ssize_t r = readlink("/proc/self/exe", pszExePath, sizeof(pszExePath) - 1);
+        if (r == -1)
             return false;
+        pszExePath[r] = '\0';
 
         fs::create_directories(GetAutostartDir());