X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Fporting.cpp;h=09627431c7e8bd501498d9ef147b92c93da787a4;hb=e1f707d7e1ac0412eedbfcc200a1b90339d3ab0d;hp=84df15b3093d166670a3b268e6c2354ad899989f;hpb=979ca23f1eae1adeb8b0083dffe7203c54d87395;p=dragonfireclient.git

diff --git a/src/porting.cpp b/src/porting.cpp
index 84df15b30..09627431c 100644
--- a/src/porting.cpp
+++ b/src/porting.cpp
@@ -23,27 +23,60 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 	See comments in porting.h
 */
 
-#if defined(linux)
-	#include <unistd.h>
-#elif defined(__APPLE__)
-	#include <unistd.h>
-	#include <mach-o/dyld.h>
-#elif defined(__FreeBSD__)
-	#include <unistd.h>
+#include "porting.h"
+
+#if defined(__FreeBSD__)  || defined(__NetBSD__) || defined(__DragonFly__) || defined(__OpenBSD__)
 	#include <sys/types.h>
 	#include <sys/sysctl.h>
+	extern char **environ;
+#elif defined(_WIN32)
+	#include <windows.h>
+	#include <wincrypt.h>
+	#include <algorithm>
+	#include <shlwapi.h>
+	#include <shellapi.h>
+	#include <mmsystem.h>
+#endif
+#if !defined(_WIN32)
+	#include <unistd.h>
+	#include <sys/utsname.h>
+	#if !defined(__ANDROID__)
+		#include <spawn.h>
+	#endif
+#endif
+#if defined(__hpux)
+	#define _PSTAT64
+	#include <sys/pstat.h>
+#endif
+#if defined(__ANDROID__)
+	#include "porting_android.h"
+#endif
+#if defined(__APPLE__)
+	// For _NSGetEnviron()
+	// Related: https://gitlab.haskell.org/ghc/ghc/issues/2458
+	#include <crt_externs.h>
+#endif
+
+#if defined(__HAIKU__)
+        #include <FindDirectory.h>
 #endif
 
-#include "porting.h"
 #include "config.h"
 #include "debug.h"
 #include "filesys.h"
 #include "log.h"
 #include "util/string.h"
 #include <list>
-
-#ifdef __APPLE__
-	#include "CoreFoundation/CoreFoundation.h"
+#include <cstdarg>
+#include <cstdio>
+
+#if !defined(SERVER) && defined(_WIN32)
+// On Windows export some driver-specific variables to encourage Minetest to be
+// executed on the discrete GPU in case of systems with two. Portability is fun.
+extern "C" {
+	__declspec(dllexport) DWORD NvOptimusEnablement = 1;
+	__declspec(dllexport) DWORD AmdPowerXpressRequestHighPerformance = 1;
+}
 #endif
 
 namespace porting
@@ -55,7 +88,7 @@ namespace porting
 
 bool g_killed = false;
 
-bool * signal_handler_killstatus(void)
+bool *signal_handler_killstatus()
 {
 	return &g_killed;
 }
@@ -63,429 +96,696 @@ bool * signal_handler_killstatus(void)
 #if !defined(_WIN32) // POSIX
 	#include <signal.h>
 
-void sigint_handler(int sig)
+void signal_handler(int sig)
 {
-	if(g_killed == false)
-	{
-		dstream<<DTIME<<"INFO: sigint_handler(): "
-				<<"Ctrl-C pressed, shutting down."<<std::endl;
+	if (!g_killed) {
+		if (sig == SIGINT) {
+			dstream << "INFO: signal_handler(): "
+				<< "Ctrl-C pressed, shutting down." << std::endl;
+		} else if (sig == SIGTERM) {
+			dstream << "INFO: signal_handler(): "
+				<< "got SIGTERM, shutting down." << std::endl;
+		}
 
 		// Comment out for less clutter when testing scripts
-		/*dstream<<DTIME<<"INFO: sigint_handler(): "
-				<<"Printing debug stacks"<<std::endl;
+		/*dstream << "INFO: sigint_handler(): "
+				<< "Printing debug stacks" << std::endl;
 		debug_stacks_print();*/
 
 		g_killed = true;
-	}
-	else
-	{
-		(void)signal(SIGINT, SIG_DFL);
+	} else {
+		(void)signal(sig, SIG_DFL);
 	}
 }
 
 void signal_handler_init(void)
 {
-	(void)signal(SIGINT, sigint_handler);
+	(void)signal(SIGINT, signal_handler);
+	(void)signal(SIGTERM, signal_handler);
 }
 
 #else // _WIN32
 	#include <signal.h>
 
-	BOOL WINAPI event_handler(DWORD sig)
-	{
-		switch(sig)
-		{
-		case CTRL_C_EVENT:
-		case CTRL_CLOSE_EVENT:
-		case CTRL_LOGOFF_EVENT:
-		case CTRL_SHUTDOWN_EVENT:
-
-			if(g_killed == false)
-			{
-				dstream<<DTIME<<"INFO: event_handler(): "
-						<<"Ctrl+C, Close Event, Logoff Event or Shutdown Event, shutting down."<<std::endl;
-				// Comment out for less clutter when testing scripts
-				/*dstream<<DTIME<<"INFO: event_handler(): "
-						<<"Printing debug stacks"<<std::endl;
-				debug_stacks_print();*/
-
-				g_killed = true;
-			}
-			else
-			{
-				(void)signal(SIGINT, SIG_DFL);
-			}
-
-			break;
-		case CTRL_BREAK_EVENT:
-			break;
+BOOL WINAPI event_handler(DWORD sig)
+{
+	switch (sig) {
+	case CTRL_C_EVENT:
+	case CTRL_CLOSE_EVENT:
+	case CTRL_LOGOFF_EVENT:
+	case CTRL_SHUTDOWN_EVENT:
+		if (!g_killed) {
+			dstream << "INFO: event_handler(): "
+				<< "Ctrl+C, Close Event, Logoff Event or Shutdown Event,"
+				" shutting down." << std::endl;
+			g_killed = true;
+		} else {
+			(void)signal(SIGINT, SIG_DFL);
 		}
-
-		return TRUE;
+		break;
+	case CTRL_BREAK_EVENT:
+		break;
 	}
 
+	return TRUE;
+}
+
 void signal_handler_init(void)
 {
-	SetConsoleCtrlHandler( (PHANDLER_ROUTINE)event_handler,TRUE);
+	SetConsoleCtrlHandler((PHANDLER_ROUTINE)event_handler, TRUE);
 }
 
 #endif
 
 
 /*
-	Multithreading support
+	Path mangler
 */
-int getNumberOfProcessors() {
-#if defined(_SC_NPROCESSORS_ONLN)
 
-	return sysconf(_SC_NPROCESSORS_ONLN);
+// Default to RUN_IN_PLACE style relative paths
+std::string path_share = "..";
+std::string path_user = "..";
+std::string path_locale = path_share + DIR_DELIM + "locale";
+std::string path_cache = path_user + DIR_DELIM + "cache";
+
+
+std::string getDataPath(const char *subpath)
+{
+	return path_share + DIR_DELIM + subpath;
+}
+
+void pathRemoveFile(char *path, char delim)
+{
+	// Remove filename and path delimiter
+	int i;
+	for(i = strlen(path)-1; i>=0; i--)
+	{
+		if(path[i] == delim)
+			break;
+	}
+	path[i] = 0;
+}
+
+bool detectMSVCBuildDir(const std::string &path)
+{
+	const char *ends[] = {
+		"bin\\Release",
+		"bin\\MinSizeRel",
+		"bin\\RelWithDebInfo",
+		"bin\\Debug",
+		"bin\\Build",
+		NULL
+	};
+	return (!removeStringEnd(path, ends).empty());
+}
 
-#elif defined(__FreeBSD__) || defined(__APPLE__)
+std::string get_sysinfo()
+{
+#ifdef _WIN32
 
-	unsigned int len, count;
-	len = sizeof(count);
-	return sysctlbyname("hw.ncpu", &count, &len, NULL, 0);
+	std::ostringstream oss;
+	LPSTR filePath = new char[MAX_PATH];
+	UINT blockSize;
+	VS_FIXEDFILEINFO *fixedFileInfo;
 
-#elif defined(_GNU_SOURCE)
+	GetSystemDirectoryA(filePath, MAX_PATH);
+	PathAppendA(filePath, "kernel32.dll");
 
-	return get_nprocs();
+	DWORD dwVersionSize = GetFileVersionInfoSizeA(filePath, NULL);
+	LPBYTE lpVersionInfo = new BYTE[dwVersionSize];
 
-#elif defined(_WIN32)
+	GetFileVersionInfoA(filePath, 0, dwVersionSize, lpVersionInfo);
+	VerQueryValueA(lpVersionInfo, "\\", (LPVOID *)&fixedFileInfo, &blockSize);
 
-	SYSTEM_INFO sysinfo;
-	GetSystemInfo(&sysinfo);
-	return sysinfo.dwNumberOfProcessors;
+	oss << "Windows/"
+		<< HIWORD(fixedFileInfo->dwProductVersionMS) << '.' // Major
+		<< LOWORD(fixedFileInfo->dwProductVersionMS) << '.' // Minor
+		<< HIWORD(fixedFileInfo->dwProductVersionLS) << ' '; // Build
 
-#elif defined(PTW32_VERSION) || defined(__hpux)
+	#ifdef _WIN64
+	oss << "x86_64";
+	#else
+	BOOL is64 = FALSE;
+	if (IsWow64Process(GetCurrentProcess(), &is64) && is64)
+		oss << "x86_64"; // 32-bit app on 64-bit OS
+	else
+		oss << "x86";
+	#endif
 
-	return pthread_num_processors_np();
+	delete[] lpVersionInfo;
+	delete[] filePath;
 
+	return oss.str();
 #else
+	struct utsname osinfo;
+	uname(&osinfo);
+	return std::string(osinfo.sysname) + "/"
+		+ osinfo.release + " " + osinfo.machine;
+#endif
+}
 
-	return 1;
 
+bool getCurrentWorkingDir(char *buf, size_t len)
+{
+#ifdef _WIN32
+	DWORD ret = GetCurrentDirectory(len, buf);
+	return (ret != 0) && (ret <= len);
+#else
+	return getcwd(buf, len);
 #endif
 }
 
 
-bool threadBindToProcessor(threadid_t tid, int pnumber) {
-#if defined(_WIN32)
+bool getExecPathFromProcfs(char *buf, size_t buflen)
+{
+#ifndef _WIN32
+	buflen--;
 
-	HANDLE hThread = OpenThread(THREAD_ALL_ACCESS, 0, tid);
-	if (!hThread)
+	ssize_t len;
+	if ((len = readlink("/proc/self/exe",     buf, buflen)) == -1 &&
+		(len = readlink("/proc/curproc/file", buf, buflen)) == -1 &&
+		(len = readlink("/proc/curproc/exe",  buf, buflen)) == -1)
 		return false;
 
-	bool success = SetThreadAffinityMask(hThread, 1 << pnumber) != 0;
-
-	CloseHandle(hThread);
-	return success;
+	buf[len] = '\0';
+	return true;
+#else
+	return false;
+#endif
+}
 
-#elif (defined(__FreeBSD__) && (__FreeBSD_version >= 702106)) \
-	|| defined(__linux) || defined(linux)
+//// Windows
+#if defined(_WIN32)
 
-	cpu_set_t cpuset;
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	DWORD written = GetModuleFileNameA(NULL, buf, len);
+	if (written == 0 || written == len)
+		return false;
 
-	CPU_ZERO(&cpuset);
-	CPU_SET(pnumber, &cpuset);
-	return pthread_setaffinity_np(tid, sizeof(cpuset), &cpuset) == 0;
+	return true;
+}
 
-#elif defined(__sun) || defined(sun)
 
-	return processor_bind(P_LWPID, MAKE_LWPID_PTHREAD(tid), 
-						pnumber, NULL) == 0;
+//// Linux
+#elif defined(__linux__)
 
-#elif defined(_AIX)
-	
-	return bindprocessor(BINDTHREAD, (tid_t)tid, pnumber) == 0;
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	if (!getExecPathFromProcfs(buf, len))
+		return false;
 
-#elif defined(__hpux) || defined(hpux)
+	return true;
+}
 
-	pthread_spu_t answer;
 
-	return pthread_processor_bind_np(PTHREAD_BIND_ADVISORY_NP,
-									&answer, pnumber, tid) == 0;
-	
+//// Mac OS X, Darwin
 #elif defined(__APPLE__)
 
-	struct thread_affinity_policy tapol;
-	
-	thread_port_t threadport = pthread_mach_thread_np(tid);
-	tapol.affinity_tag = pnumber + 1;
-	return thread_policy_set(threadport, THREAD_AFFINITY_POLICY,
-			(thread_policy_t)&tapol, THREAD_AFFINITY_POLICY_COUNT) == KERN_SUCCESS;
-
-#else
-
-	return false;
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	uint32_t lenb = (uint32_t)len;
+	if (_NSGetExecutablePath(buf, &lenb) == -1)
+		return false;
 
-#endif
+	return true;
 }
 
 
-bool threadSetPriority(threadid_t tid, int prio) {
-#if defined(_WIN32)
+//// FreeBSD, NetBSD, DragonFlyBSD
+#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
 
-	HANDLE hThread = OpenThread(THREAD_ALL_ACCESS, 0, tid);
-	if (!hThread)
-		return false;
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	// Try getting path from procfs first, since valgrind
+	// doesn't work with the latter
+	if (getExecPathFromProcfs(buf, len))
+		return true;
 
-	bool success = SetThreadPriority(hThread, prio) != 0;
+	int mib[4];
 
-	CloseHandle(hThread);
-	return success;
-	
-#else
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_PROC;
+	mib[2] = KERN_PROC_PATHNAME;
+	mib[3] = -1;
 
-	struct sched_param sparam;
-	int policy;
-	
-	if (pthread_getschedparam(tid, &policy, &sparam) != 0)
+	if (sysctl(mib, 4, buf, &len, NULL, 0) == -1)
 		return false;
-		
-	int min = sched_get_priority_min(policy);
-	int max = sched_get_priority_max(policy);
 
-	sparam.sched_priority = min + prio * (max - min) / THREAD_PRIORITY_HIGHEST;
-	return pthread_setschedparam(tid, policy, &sparam) == 0;
-	
-#endif
+	return true;
 }
 
+#elif defined(__HAIKU__)
 
-/*
-	Path mangler
-*/
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	return find_path(B_APP_IMAGE_SYMBOL, B_FIND_PATH_IMAGE_PATH, NULL, buf, len) == B_OK;
+}
 
-// Default to RUN_IN_PLACE style relative paths
-std::string path_share = "..";
-std::string path_user = "..";
+//// Solaris
+#elif defined(__sun) || defined(sun)
 
-std::string getDataPath(const char *subpath)
+bool getCurrentExecPath(char *buf, size_t len)
 {
-	return path_share + DIR_DELIM + subpath;
+	const char *exec = getexecname();
+	if (exec == NULL)
+		return false;
+
+	if (strlcpy(buf, exec, len) >= len)
+		return false;
+
+	return true;
 }
 
-void pathRemoveFile(char *path, char delim)
+
+// HP-UX
+#elif defined(__hpux)
+
+bool getCurrentExecPath(char *buf, size_t len)
 {
-	// Remove filename and path delimiter
-	int i;
-	for(i = strlen(path)-1; i>=0; i--)
-	{
-		if(path[i] == delim)
-			break;
-	}
-	path[i] = 0;
+	struct pst_status psts;
+
+	if (pstat_getproc(&psts, sizeof(psts), 0, getpid()) == -1)
+		return false;
+
+	if (pstat_getpathname(buf, len, &psts.pst_fid_text) == -1)
+		return false;
+
+	return true;
 }
 
-bool detectMSVCBuildDir(char *c_path)
+
+#else
+
+bool getCurrentExecPath(char *buf, size_t len)
 {
-	std::string path(c_path);
-	const char *ends[] = {"bin\\Release", "bin\\Build", NULL};
-	return (removeStringEnd(path, ends) != "");
+	return false;
 }
 
-void initializePaths()
+#endif
+
+
+//// Non-Windows
+#if !defined(_WIN32)
+
+const char *getHomeOrFail()
 {
-#if RUN_IN_PLACE
-	/*
-		Use relative paths if RUN_IN_PLACE
-	*/
+	const char *home = getenv("HOME");
+	// In rare cases the HOME environment variable may be unset
+	FATAL_ERROR_IF(!home,
+		"Required environment variable HOME is not set");
+	return home;
+}
+
+#endif
 
-	infostream<<"Using relative paths (RUN_IN_PLACE)"<<std::endl;
 
-	/*
-		Windows
-	*/
-	#if defined(_WIN32)
+//// Windows
+#if defined(_WIN32)
 
-	const DWORD buflen = 1000;
-	char buf[buflen];
-	DWORD len;
+bool setSystemPaths()
+{
+	char buf[BUFSIZ];
 
 	// Find path of executable and set path_share relative to it
-	len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
-	assert(len < buflen);
+	FATAL_ERROR_IF(!getCurrentExecPath(buf, sizeof(buf)),
+		"Failed to get current executable path");
 	pathRemoveFile(buf, '\\');
 
-	if(detectMSVCBuildDir(buf)){
-		infostream<<"MSVC build directory detected"<<std::endl;
-		path_share = std::string(buf) + "\\..\\..";
-		path_user = std::string(buf) + "\\..\\..";
-	}
-	else{
-		path_share = std::string(buf) + "\\..";
-		path_user = std::string(buf) + "\\..";
-	}
+	std::string exepath(buf);
 
-	/*
-		Linux
-	*/
-	#elif defined(linux)
+	// Use ".\bin\.."
+	path_share = exepath + "\\..";
+	if (detectMSVCBuildDir(exepath)) {
+		// The msvc build dir schould normaly not be present if properly installed,
+		// but its usefull for debugging.
+		path_share += DIR_DELIM "..";
+	}
 
-	char buf[BUFSIZ];
-	memset(buf, 0, BUFSIZ);
-	// Get path to executable
-	assert(readlink("/proc/self/exe", buf, BUFSIZ-1) != -1);
+	// Use "C:\Users\<user>\AppData\Roaming\<PROJECT_NAME_C>"
+	DWORD len = GetEnvironmentVariable("APPDATA", buf, sizeof(buf));
+	FATAL_ERROR_IF(len == 0 || len > sizeof(buf), "Failed to get APPDATA");
 
-	pathRemoveFile(buf, '/');
+	path_user = std::string(buf) + DIR_DELIM + PROJECT_NAME_C;
+	return true;
+}
 
-	path_share = std::string(buf) + "/..";
-	path_user = std::string(buf) + "/..";
 
-	/*
-		OS X
-	*/
-	#elif defined(__APPLE__)
+//// Linux
+#elif defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
 
-	//https://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/dyld.3.html
-	//TODO: Test this code
+bool setSystemPaths()
+{
 	char buf[BUFSIZ];
-	uint32_t len = sizeof(buf);
-	assert(_NSGetExecutablePath(buf, &len) != -1);
+
+	if (!getCurrentExecPath(buf, sizeof(buf))) {
+#ifdef __ANDROID__
+		errorstream << "Unable to read bindir "<< std::endl;
+#else
+		FATAL_ERROR("Unable to read bindir");
+#endif
+		return false;
+	}
 
 	pathRemoveFile(buf, '/');
+	std::string bindir(buf);
+
+	// Find share directory from these.
+	// It is identified by containing the subdirectory "builtin".
+	std::list<std::string> trylist;
+	std::string static_sharedir = STATIC_SHAREDIR;
+	if (!static_sharedir.empty() && static_sharedir != ".")
+		trylist.push_back(static_sharedir);
 
-	path_share = std::string(buf) + "/..";
-	path_user = std::string(buf) + "/..";
+	trylist.push_back(bindir + DIR_DELIM ".." DIR_DELIM "share"
+		DIR_DELIM + PROJECT_NAME);
+	trylist.push_back(bindir + DIR_DELIM "..");
 
-	/*
-		FreeBSD
-	*/
-	#elif defined(__FreeBSD__)
+#ifdef __ANDROID__
+	trylist.push_back(path_user);
+#endif
 
-	int mib[4];
-	char buf[BUFSIZ];
-	size_t len = sizeof(buf);
+	for (std::list<std::string>::const_iterator
+			i = trylist.begin(); i != trylist.end(); ++i) {
+		const std::string &trypath = *i;
+		if (!fs::PathExists(trypath) ||
+			!fs::PathExists(trypath + DIR_DELIM + "builtin")) {
+			warningstream << "system-wide share not found at \""
+					<< trypath << "\""<< std::endl;
+			continue;
+		}
 
-	mib[0] = CTL_KERN;
-	mib[1] = KERN_PROC;
-	mib[2] = KERN_PROC_PATHNAME;
-	mib[3] = -1;
-	assert(sysctl(mib, 4, buf, &len, NULL, 0) != -1);
+		// Warn if was not the first alternative
+		if (i != trylist.begin()) {
+			warningstream << "system-wide share found at \""
+					<< trypath << "\"" << std::endl;
+		}
 
-	pathRemoveFile(buf, '/');
+		path_share = trypath;
+		break;
+	}
 
-	path_share = std::string(buf) + "/..";
-	path_user = std::string(buf) + "/..";
+#ifndef __ANDROID__
+	path_user = std::string(getHomeOrFail()) + DIR_DELIM "."
+		+ PROJECT_NAME;
+#endif
 
-	#else
+	return true;
+}
 
-	//TODO: Get path of executable. This assumes working directory is bin/
-	dstream<<"WARNING: Relative path not properly supported on this platform"
-			<<std::endl;
-	path_share = std::string("..");
-	path_user = std::string("..");
 
-	#endif
+//// Mac OS X
+#elif defined(__APPLE__)
 
-#else // RUN_IN_PLACE
+bool setSystemPaths()
+{
+	CFBundleRef main_bundle = CFBundleGetMainBundle();
+	CFURLRef resources_url = CFBundleCopyResourcesDirectoryURL(main_bundle);
+	char path[PATH_MAX];
+	if (CFURLGetFileSystemRepresentation(resources_url,
+			TRUE, (UInt8 *)path, PATH_MAX)) {
+		path_share = std::string(path);
+	} else {
+		warningstream << "Could not determine bundle resource path" << std::endl;
+	}
+	CFRelease(resources_url);
 
-	/*
-		Use platform-specific paths otherwise
-	*/
+	path_user = std::string(getHomeOrFail())
+		+ "/Library/Application Support/"
+		+ PROJECT_NAME;
+	return true;
+}
 
-	infostream<<"Using system-wide paths (NOT RUN_IN_PLACE)"<<std::endl;
 
-	/*
-		Windows
-	*/
-	#if defined(_WIN32)
+#else
 
-	const DWORD buflen = 1000;
-	char buf[buflen];
-	DWORD len;
+bool setSystemPaths()
+{
+	path_share = STATIC_SHAREDIR;
+	path_user  = std::string(getHomeOrFail()) + DIR_DELIM "."
+		+ lowercase(PROJECT_NAME);
+	return true;
+}
 
-	// Find path of executable and set path_share relative to it
-	len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
-	assert(len < buflen);
-	pathRemoveFile(buf, '\\');
 
-	// Use ".\bin\.."
-	path_share = std::string(buf) + "\\..";
+#endif
 
-	// Use "C:\Documents and Settings\user\Application Data\<PROJECT_NAME>"
-	len = GetEnvironmentVariable("APPDATA", buf, buflen);
-	assert(len < buflen);
-	path_user = std::string(buf) + DIR_DELIM + PROJECT_NAME;
+void migrateCachePath()
+{
+	const std::string local_cache_path = path_user + DIR_DELIM + "cache";
 
-	/*
-		Linux
-	*/
-	#elif defined(linux)
+	// Delete tmp folder if it exists (it only ever contained
+	// a temporary ogg file, which is no longer used).
+	if (fs::PathExists(local_cache_path + DIR_DELIM + "tmp"))
+		fs::RecursiveDelete(local_cache_path + DIR_DELIM + "tmp");
 
-	// Get path to executable
-	std::string bindir = "";
-	{
-		char buf[BUFSIZ];
-		memset(buf, 0, BUFSIZ);
-		assert(readlink("/proc/self/exe", buf, BUFSIZ-1) != -1);
-		pathRemoveFile(buf, '/');
-		bindir = buf;
+	// Bail if migration impossible
+	if (path_cache == local_cache_path || !fs::PathExists(local_cache_path)
+			|| fs::PathExists(path_cache)) {
+		return;
 	}
+	if (!fs::Rename(local_cache_path, path_cache)) {
+		errorstream << "Failed to migrate local cache path "
+			"to system path!" << std::endl;
+	}
+}
 
-	// Find share directory from these.
-	// It is identified by containing the subdirectory "builtin".
-	std::list<std::string> trylist;
-	std::string static_sharedir = STATIC_SHAREDIR;
-	if(static_sharedir != "" && static_sharedir != ".")
-		trylist.push_back(static_sharedir);
-	trylist.push_back(bindir + "/../share/" + PROJECT_NAME);
-	trylist.push_back(bindir + "/..");
+void initializePaths()
+{
+#if RUN_IN_PLACE
+	char buf[BUFSIZ];
 
-	for(std::list<std::string>::const_iterator i = trylist.begin();
-			i != trylist.end(); i++)
-	{
-		const std::string &trypath = *i;
-		if(!fs::PathExists(trypath) || !fs::PathExists(trypath + "/builtin")){
-			dstream<<"WARNING: system-wide share not found at \""
-					<<trypath<<"\""<<std::endl;
-			continue;
+	infostream << "Using relative paths (RUN_IN_PLACE)" << std::endl;
+
+	bool success =
+		getCurrentExecPath(buf, sizeof(buf)) ||
+		getExecPathFromProcfs(buf, sizeof(buf));
+
+	if (success) {
+		pathRemoveFile(buf, DIR_DELIM_CHAR);
+		std::string execpath(buf);
+
+		path_share = execpath + DIR_DELIM "..";
+		path_user  = execpath + DIR_DELIM "..";
+
+		if (detectMSVCBuildDir(execpath)) {
+			path_share += DIR_DELIM "..";
+			path_user  += DIR_DELIM "..";
 		}
-		// Warn if was not the first alternative
-		if(i != trylist.begin()){
-			dstream<<"WARNING: system-wide share found at \""
-					<<trypath<<"\""<<std::endl;
+	} else {
+		errorstream << "Failed to get paths by executable location, "
+			"trying cwd" << std::endl;
+
+		if (!getCurrentWorkingDir(buf, sizeof(buf)))
+			FATAL_ERROR("Ran out of methods to get paths");
+
+		size_t cwdlen = strlen(buf);
+		if (cwdlen >= 1 && buf[cwdlen - 1] == DIR_DELIM_CHAR) {
+			cwdlen--;
+			buf[cwdlen] = '\0';
 		}
-		path_share = trypath;
-		break;
+
+		if (cwdlen >= 4 && !strcmp(buf + cwdlen - 4, DIR_DELIM "bin"))
+			pathRemoveFile(buf, DIR_DELIM_CHAR);
+
+		std::string execpath(buf);
+
+		path_share = execpath;
+		path_user  = execpath;
+	}
+	path_cache = path_user + DIR_DELIM + "cache";
+#else
+	infostream << "Using system-wide paths (NOT RUN_IN_PLACE)" << std::endl;
+
+	if (!setSystemPaths())
+		errorstream << "Failed to get one or more system-wide path" << std::endl;
+
+
+#  ifdef _WIN32
+	path_cache = path_user + DIR_DELIM + "cache";
+#  else
+	// Initialize path_cache
+	// First try $XDG_CACHE_HOME/PROJECT_NAME
+	const char *cache_dir = getenv("XDG_CACHE_HOME");
+	const char *home_dir = getenv("HOME");
+	if (cache_dir && cache_dir[0] != '\0') {
+		path_cache = std::string(cache_dir) + DIR_DELIM + PROJECT_NAME;
+	} else if (home_dir) {
+		// Then try $HOME/.cache/PROJECT_NAME
+		path_cache = std::string(home_dir) + DIR_DELIM + ".cache"
+			+ DIR_DELIM + PROJECT_NAME;
+	} else {
+		// If neither works, use $PATH_USER/cache
+		path_cache = path_user + DIR_DELIM + "cache";
+	}
+	// Migrate cache folder to new location if possible
+	migrateCachePath();
+#  endif // _WIN32
+#endif // RUN_IN_PLACE
+
+	infostream << "Detected share path: " << path_share << std::endl;
+	infostream << "Detected user path: " << path_user << std::endl;
+	infostream << "Detected cache path: " << path_cache << std::endl;
+
+#if USE_GETTEXT
+	bool found_localedir = false;
+#  ifdef STATIC_LOCALEDIR
+	/* STATIC_LOCALEDIR may be a generalized path such as /usr/share/locale that
+	 * doesn't necessarily contain our locale files, so check data path first. */
+	path_locale = getDataPath("locale");
+	if (fs::PathExists(path_locale)) {
+		found_localedir = true;
+		infostream << "Using in-place locale directory " << path_locale
+			<< " even though a static one was provided." << std::endl;
+	} else if (STATIC_LOCALEDIR[0] && fs::PathExists(STATIC_LOCALEDIR)) {
+		found_localedir = true;
+		path_locale = STATIC_LOCALEDIR;
+		infostream << "Using static locale directory " << STATIC_LOCALEDIR
+			<< std::endl;
+	}
+#  else
+	path_locale = getDataPath("locale");
+	if (fs::PathExists(path_locale)) {
+		found_localedir = true;
+	}
+#  endif
+	if (!found_localedir) {
+		warningstream << "Couldn't find a locale directory!" << std::endl;
 	}
+#endif  // USE_GETTEXT
+}
 
-	path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
+////
+//// OS-specific Secure Random
+////
 
-	/*
-		OS X
-	*/
-	#elif defined(__APPLE__)
+#ifdef WIN32
 
-    // Code based on
-    // http://stackoverflow.com/questions/516200/relative-paths-not-working-in-xcode-c
-    CFBundleRef main_bundle = CFBundleGetMainBundle();
-    CFURLRef resources_url = CFBundleCopyResourcesDirectoryURL(main_bundle);
-    char path[PATH_MAX];
-    if(CFURLGetFileSystemRepresentation(resources_url, TRUE, (UInt8 *)path, PATH_MAX))
-	{
-		dstream<<"Bundle resource path: "<<path<<std::endl;
-		//chdir(path);
-		path_share = std::string(path) + "/share";
+bool secure_rand_fill_buf(void *buf, size_t len)
+{
+	HCRYPTPROV wctx;
+
+	if (!CryptAcquireContext(&wctx, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
+		return false;
+
+	CryptGenRandom(wctx, len, (BYTE *)buf);
+	CryptReleaseContext(wctx, 0);
+	return true;
+}
+
+#else
+
+bool secure_rand_fill_buf(void *buf, size_t len)
+{
+	// N.B.  This function checks *only* for /dev/urandom, because on most
+	// common OSes it is non-blocking, whereas /dev/random is blocking, and it
+	// is exceptionally uncommon for there to be a situation where /dev/random
+	// exists but /dev/urandom does not.  This guesswork is necessary since
+	// random devices are not covered by any POSIX standard...
+	FILE *fp = fopen("/dev/urandom", "rb");
+	if (!fp)
+		return false;
+
+	bool success = fread(buf, len, 1, fp) == 1;
+
+	fclose(fp);
+	return success;
+}
+
+#endif
+
+void attachOrCreateConsole()
+{
+#ifdef _WIN32
+	static bool consoleAllocated = false;
+	const bool redirected = (_fileno(stdout) == -2 || _fileno(stdout) == -1); // If output is redirected to e.g a file
+	if (!consoleAllocated && redirected && (AttachConsole(ATTACH_PARENT_PROCESS) || AllocConsole())) {
+		freopen("CONOUT$", "w", stdout);
+		freopen("CONOUT$", "w", stderr);
+		consoleAllocated = true;
 	}
-	else
-    {
-        // error!
-		dstream<<"WARNING: Could not determine bundle resource path"<<std::endl;
-    }
-    CFRelease(resources_url);
+#endif
+}
 
-	path_user = std::string(getenv("HOME")) + "/Library/Application Support/" + PROJECT_NAME;
+int mt_snprintf(char *buf, const size_t buf_size, const char *fmt, ...)
+{
+	// https://msdn.microsoft.com/en-us/library/bt7tawza.aspx
+	//  Many of the MSVC / Windows printf-style functions do not support positional
+	//  arguments (eg. "%1$s"). We just forward the call to vsnprintf for sane
+	//  platforms, but defer to _vsprintf_p on MSVC / Windows.
+	// https://github.com/FFmpeg/FFmpeg/blob/5ae9fa13f5ac640bec113120d540f70971aa635d/compat/msvcrt/snprintf.c#L46
+	//  _vsprintf_p has to be shimmed with _vscprintf_p on -1 (for an example see
+	//  above FFmpeg link).
+	va_list args;
+	va_start(args, fmt);
+#ifndef _MSC_VER
+	int c = vsnprintf(buf, buf_size, fmt, args);
+#else  // _MSC_VER
+	int c = _vsprintf_p(buf, buf_size, fmt, args);
+	if (c == -1)
+		c = _vscprintf_p(fmt, args);
+#endif // _MSC_VER
+	va_end(args);
+	return c;
+}
 
-	#elif defined(__FreeBSD__)
+static bool open_uri(const std::string &uri)
+{
+	if (uri.find_first_of("\r\n") != std::string::npos) {
+		errorstream << "Unable to open URI as it is invalid, contains new line: " << uri << std::endl;
+		return false;
+	}
 
-	path_share = STATIC_SHAREDIR;
-	path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
+#if defined(_WIN32)
+	return (intptr_t)ShellExecuteA(NULL, NULL, uri.c_str(), NULL, NULL, SW_SHOWNORMAL) > 32;
+#elif defined(__ANDROID__)
+	openURIAndroid(uri);
+	return true;
+#elif defined(__APPLE__)
+	const char *argv[] = {"open", uri.c_str(), NULL};
+	return posix_spawnp(NULL, "open", NULL, NULL, (char**)argv,
+		(*_NSGetEnviron())) == 0;
+#else
+	const char *argv[] = {"xdg-open", uri.c_str(), NULL};
+	return posix_spawnp(NULL, "xdg-open", NULL, NULL, (char**)argv, environ) == 0;
+#endif
+}
 
-	#endif
+bool open_url(const std::string &url)
+{
+	if (url.substr(0, 7) != "http://" && url.substr(0, 8) != "https://") {
+		errorstream << "Unable to open browser as URL is missing schema: " << url << std::endl;
+		return false;
+	}
 
-#endif // RUN_IN_PLACE
+	return open_uri(url);
 }
 
-} //namespace porting
+bool open_directory(const std::string &path)
+{
+	if (!fs::IsDir(path)) {
+		errorstream << "Unable to open directory as it does not exist: " << path << std::endl;
+		return false;
+	}
+
+	return open_uri(path);
+}
 
+// Load performance counter frequency only once at startup
+#ifdef _WIN32
+
+inline double get_perf_freq()
+{
+	// Also use this opportunity to enable high-res timers
+	timeBeginPeriod(1);
+
+	LARGE_INTEGER freq;
+	QueryPerformanceFrequency(&freq);
+	return freq.QuadPart;
+}
+
+double perf_freq = get_perf_freq();
+
+#endif
+
+} //namespace porting