From 54d079387e8b55fad6a961837c33e8f677221247 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Marjam=C3=A4ki?= <daniel.marjamaki@gmail.com>
Date: Sat, 19 Mar 2022 11:27:59 +0100
Subject: [PATCH] cli: in linux set proper exename value when cppcheck is
 executed from PATH and argv[0] does not have path information

---
 cli/cmdlineparser.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/cli/cmdlineparser.cpp b/cli/cmdlineparser.cpp
index 8e6b8cc60..04187e96d 100644
--- a/cli/cmdlineparser.cpp
+++ b/cli/cmdlineparser.cpp
@@ -46,6 +46,10 @@
 #include <tinyxml2.h>
 #endif
 
+#ifdef __linux__
+#include <unistd.h>
+#endif
+
 static void addFilesToList(const std::string& fileList, std::vector<std::string>& pathNames)
 {
     // To keep things initially simple, if the file can't be opened, just be silent and move on.
@@ -122,6 +126,14 @@ bool CmdLineParser::parseFromArgs(int argc, const char* const argv[])
     bool maxconfigs = false;
 
     mSettings->exename = argv[0];
+#ifdef __linux__
+    // Executing cppcheck in PATH. argv[0] does not contain the path.
+    if (mSettings->exename.find_first_of("/\\") == std::string::npos) {
+        char buf[PATH_MAX] = {0};
+        if (FileLister::fileExists("/proc/self/exe") && readlink("/proc/self/exe", buf, sizeof(buf)-1) > 0)
+            mSettings->exename = buf;
+    }
+#endif
 
     for (int i = 1; i < argc; i++) {
         if (argv[i][0] == '-') {