From a24d3e67bcb4427c8eb171c4ca90b66eff0ef2a3 Mon Sep 17 00:00:00 2001
From: Stephen Anthony <sa666666@gmail.com>
Date: Sun, 3 Apr 2022 20:36:39 -0230
Subject: [PATCH] Minor 'const' updates to POSIX classes.

---
 src/unix/FSNodePOSIX.cxx    | 6 +++---
 src/unix/SerialPortUNIX.cxx | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/unix/FSNodePOSIX.cxx b/src/unix/FSNodePOSIX.cxx
index 57af6051b..3ce8aa44b 100644
--- a/src/unix/FSNodePOSIX.cxx
+++ b/src/unix/FSNodePOSIX.cxx
@@ -37,7 +37,7 @@ FilesystemNodePOSIX::FilesystemNodePOSIX(const string& path, bool verify)
   // Expand '~' to the HOME environment variable
   if(_path[0] == '~')
   {
-    string home = BSPF::getenv("HOME");
+    const string& home = BSPF::getenv("HOME");
     if(home != EmptyString)
       _path.replace(0, 1, home);
   }
@@ -78,7 +78,7 @@ void FilesystemNodePOSIX::setFlags()
 string FilesystemNodePOSIX::getShortPath() const
 {
   // If the path starts with the home directory, replace it with '~'
-  string home = BSPF::getenv("HOME");
+  const string& home = BSPF::getenv("HOME");
   if(home != EmptyString && BSPF::startsWithIgnoreCase(_path, home))
   {
     string path = "~";
@@ -106,7 +106,7 @@ bool FilesystemNodePOSIX::getChildren(AbstractFSList& myList, ListMode mode) con
     return false;
 
   // Loop over dir entries using readdir
-  struct dirent* dp;
+  struct dirent* dp = nullptr;
   while ((dp = readdir(dirp)) != nullptr)
   {
     // Ignore all hidden files
diff --git a/src/unix/SerialPortUNIX.cxx b/src/unix/SerialPortUNIX.cxx
index 30ec04cda..c598e69e3 100644
--- a/src/unix/SerialPortUNIX.cxx
+++ b/src/unix/SerialPortUNIX.cxx
@@ -104,14 +104,14 @@ StringList SerialPortUNIX::portNames()
 
   // Check if port is valid; for now that means if it can be opened
   // Eventually we may extend this to do more intensive checks
-  auto isPortValid = [](const string& port) {
+  const auto isPortValid = [](const string& port) {
     int handle = open(port.c_str(), O_RDWR | O_NOCTTY | O_NONBLOCK);
     if(handle > 0)  close(handle);
     return handle > 0;
   };
 
   // Get all possible devices in the '/dev' directory
-  FilesystemNode::NameFilter filter = [](const FilesystemNode& node) {
+  const FilesystemNode::NameFilter filter = [](const FilesystemNode& node) {
     return BSPF::startsWithIgnoreCase(node.getPath(), "/dev/ttyACM") ||
            BSPF::startsWithIgnoreCase(node.getPath(), "/dev/ttyUSB");
   };