Move m_sHomePath from CZNC to CFile

Thanks to this change, linking the following object files produces no unresolved
symbols: FileUtils.o Utils.o ZNCString.o MD5.o SHA256.o

The idea here is that ZNC is a little better modularized.

Signed-off-by: Uli Schlachter <psychon@znc.in>

FileUtils.cpp

@@ -7,12 +7,12 @@
  */
 
 #include "FileUtils.h"
-#include "znc.h"
 #include "Utils.h"
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <fcntl.h>
+#include <pwd.h>
 
 #ifndef HAVE_LSTAT
 #  define lstat(a, b)	stat(a, b)
@@ -22,6 +22,8 @@
 #  define O_BINARY	0
 #endif
 
+CString CFile::m_sHomePath;
+
 CFile::CFile() {
 	m_iFD = -1;
 }
@@ -38,7 +40,7 @@ CFile::~CFile() {
 
 void CFile::SetFileName(const CString& sLongName) {
 	if (sLongName.Left(2) == "~/") {
-		m_sLongName = CZNC::Get().GetHomePath() + sLongName.substr(1);
+		m_sLongName = CFile::GetHomePath() + sLongName.substr(1);
 	} else
 		m_sLongName = sLongName;
 
@@ -426,11 +428,32 @@ CString CFile::GetDir() const {
 	return sDir;
 }
 
+void CFile::InitHomePath(const CString& sFallback) {
+	const char *home = getenv("HOME");
+
+	m_sHomePath.clear();
+	if (home) {
+		m_sHomePath = home;
+	}
+
+	if (m_sHomePath.empty()) {
+		const struct passwd* pUserInfo = getpwuid(getuid());
+
+		if (pUserInfo) {
+			m_sHomePath = pUserInfo->pw_dir;
+		}
+	}
+
+	if (m_sHomePath.empty()) {
+		m_sHomePath = sFallback;
+	}
+}
+
 CString CDir::ChangeDir(const CString& sPath, const CString& sAdd, const CString& sHome) {
 	CString sHomeDir(sHome);
 
 	if (sHomeDir.empty()) {
-		sHomeDir = CZNC::Get().GetHomePath();
+		sHomeDir = CFile::GetHomePath();
 	}
 
 	if (sAdd == "~") {

FileUtils.h

@@ -120,6 +120,9 @@ public:
 	CString GetShortName() const;
 	CString GetDir() const;
 
+	static void InitHomePath(const CString& sFallback);
+	static const CString& GetHomePath() { return m_sHomePath; }
+
 private:
 	// fcntl() locking wrapper
 	bool Lock(int iType, bool bBlocking);
@@ -127,6 +130,8 @@ private:
 	CString m_sBuffer;
 	int     m_iFD;
 
+	static CString m_sHomePath;
+
 protected:
 	CString m_sLongName;  //!< Absolute filename (m_sPath + "/" + m_sShortName)
 	CString m_sShortName; //!< Filename alone, without path

znc.cpp

@@ -12,7 +12,6 @@
 #include "Server.h"
 #include "User.h"
 #include "Listener.h"
-#include <pwd.h>
 #include <list>
 
 namespace
@@ -418,8 +417,6 @@ bool CZNC::AllowConnectionFrom(const CString& sIP) const {
 }
 
 void CZNC::InitDirs(const CString& sArgvPath, const CString& sDataDir) {
-	char *home;
-
 	// If the bin was not ran from the current directory, we need to add that dir onto our cwd
 	CString::size_type uPos = sArgvPath.rfind('/');
 	if (uPos == CString::npos)
@@ -428,27 +425,10 @@ void CZNC::InitDirs(const CString& sArgvPath, const CString& sDataDir) {
 		m_sCurPath = CDir::ChangeDir("./", sArgvPath.Left(uPos), "");
 
 	// Try to set the user's home dir, default to binpath on failure
-	home = getenv("HOME");
-
-	m_sHomePath.clear();
-	if (home) {
-		m_sHomePath = home;
-	}
-
-	if (m_sHomePath.empty()) {
-		struct passwd* pUserInfo = getpwuid(getuid());
-
-		if (pUserInfo) {
-			m_sHomePath = pUserInfo->pw_dir;
-		}
-	}
-
-	if (m_sHomePath.empty()) {
-		m_sHomePath = m_sCurPath;
-	}
+	CFile::InitHomePath(m_sCurPath);
 
 	if (sDataDir.empty()) {
-		m_sZNCPath = m_sHomePath + "/.znc";
+		m_sZNCPath = CFile::GetHomePath() + "/.znc";
 	} else {
 		m_sZNCPath = sDataDir;
 	}

znc.h

@@ -99,7 +99,7 @@ public:
 	CString GetSkinName() const { return m_sSkinName; }
 	const CString& GetStatusPrefix() const { return m_sStatusPrefix; }
 	const CString& GetCurPath() const { if (!CFile::Exists(m_sCurPath)) { CDir::MakeDir(m_sCurPath); } return m_sCurPath; }
-	const CString& GetHomePath() const { if (!CFile::Exists(m_sHomePath)) { CDir::MakeDir(m_sHomePath); } return m_sHomePath; }
+	const CString& GetHomePath() const { return CFile::GetHomePath(); }
 	const CString& GetZNCPath() const { if (!CFile::Exists(m_sZNCPath)) { CDir::MakeDir(m_sZNCPath); } return m_sZNCPath; }
 	CString GetConfPath(bool bAllowMkDir = true) const;
 	CString GetUserPath() const;
@@ -165,7 +165,6 @@ protected:
 	CSockManager           m_Manager;
 
 	CString                m_sCurPath;
-	CString                m_sHomePath;
 	CString                m_sZNCPath;
 
 	CString                m_sConfigFile;