X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Fporting.cpp;h=04a7952c6ac73f8e7b4a61f179c25c8b60be26d0;hb=40dd03e328ff0ae36338615114cb38879752756e;hp=945aea6eb3887085ab20dea571c40d236ad91707;hpb=aef1332e4293d873ce5b827785daa3097209c5e6;p=minetest.git

diff --git a/src/porting.cpp b/src/porting.cpp
index 945aea6eb..04a7952c6 100644
--- a/src/porting.cpp
+++ b/src/porting.cpp
@@ -1,6 +1,6 @@
 /*
-Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
@@ -24,17 +24,32 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 #include "porting.h"
+
+#if defined(__FreeBSD__)  || defined(__NetBSD__) || defined(__DragonFly__)
+	#include <sys/types.h>
+	#include <sys/sysctl.h>
+#elif defined(_WIN32)
+	#include <windows.h>
+	#include <wincrypt.h>
+	#include <algorithm>
+#endif
+#if !defined(_WIN32)
+	#include <unistd.h>
+	#include <sys/utsname.h>
+#endif
+#if defined(__hpux)
+	#define _PSTAT64
+	#include <sys/pstat.h>
+#endif
+
 #include "config.h"
 #include "debug.h"
 #include "filesys.h"
 #include "log.h"
 #include "util/string.h"
+#include "settings.h"
 #include <list>
 
-#ifdef __APPLE__
-	#include "CoreFoundation/CoreFoundation.h"
-#endif
-
 namespace porting
 {
 
@@ -44,7 +59,7 @@ namespace porting
 
 bool g_killed = false;
 
-bool * signal_handler_killstatus(void)
+bool *signal_handler_killstatus()
 {
 	return &g_killed;
 }
@@ -52,75 +67,68 @@ 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>
-	#include <windows.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
 
+
 /*
 	Path mangler
 */
@@ -128,6 +136,9 @@ void signal_handler_init(void)
 // 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)
 {
@@ -146,187 +157,497 @@ void pathRemoveFile(char *path, char delim)
 	path[i] = 0;
 }
 
-bool detectMSVCBuildDir(char *c_path)
+bool detectMSVCBuildDir(const std::string &path)
 {
-	std::string path(c_path);
-	const char *ends[] = {"bin\\Release", "bin\\Build", NULL};
-	return (removeStringEnd(path, ends) != "");
+	const char *ends[] = {
+		"bin\\Release",
+		"bin\\MinSizeRel",
+		"bin\\RelWithDebInfo",
+		"bin\\Debug",
+		"bin\\Build",
+		NULL
+	};
+	return (!removeStringEnd(path, ends).empty());
 }
 
-void initializePaths()
+std::string get_sysinfo()
 {
-#if RUN_IN_PLACE
-	/*
-		Use relative paths if RUN_IN_PLACE
-	*/
-
-	infostream<<"Using relative paths (RUN_IN_PLACE)"<<std::endl;
-
-	/*
-		Windows
-	*/
-	#if defined(_WIN32)
-		#include <windows.h>
-
-	const DWORD buflen = 1000;
-	char buf[buflen];
-	DWORD len;
-	
-	// Find path of executable and set path_share relative to it
-	len = GetModuleFileName(GetModuleHandle(NULL), buf, buflen);
-	assert(len < buflen);
-	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) + "\\..";
-	}
+#ifdef _WIN32
+	OSVERSIONINFO osvi;
+	std::ostringstream oss;
+	std::string tmp;
+	ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
+	osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+	GetVersionEx(&osvi);
+	tmp = osvi.szCSDVersion;
+	std::replace(tmp.begin(), tmp.end(), ' ', '_');
+
+	oss << "Windows/" << osvi.dwMajorVersion << "."
+		<< osvi.dwMinorVersion;
+	if (osvi.szCSDVersion[0])
+		oss << "-" << tmp;
+	oss << " ";
+	#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
 
-	/*
-		Linux
-	*/
-	#elif defined(linux)
-		#include <unistd.h>
-	
-	char buf[BUFSIZ];
-	memset(buf, 0, BUFSIZ);
-	// Get path to executable
-	assert(readlink("/proc/self/exe", buf, BUFSIZ-1) != -1);
-	
-	pathRemoveFile(buf, '/');
+	return oss.str();
+#else
+	struct utsname osinfo;
+	uname(&osinfo);
+	return std::string(osinfo.sysname) + "/"
+		+ osinfo.release + " " + osinfo.machine;
+#endif
+}
 
-	path_share = std::string(buf) + "/..";
-	path_user = std::string(buf) + "/..";
-	
-	/*
-		OS X
-	*/
-	#elif defined(__APPLE__) || defined(__FreeBSD__)
-	
-	//TODO: Get path of executable. This assumes working directory is bin/
-	dstream<<"WARNING: Relative path not properly supported on OS X and FreeBSD"
-			<<std::endl;
-	path_share = std::string("..");
-	path_user = std::string("..");
 
-	#endif
+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 getExecPathFromProcfs(char *buf, size_t buflen)
+{
+#ifndef _WIN32
+	buflen--;
+
+	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;
+
+	buf[len] = '\0';
+	return true;
+#else
+	return false;
+#endif
+}
+
+//// Windows
+#if defined(_WIN32)
 
-#else // RUN_IN_PLACE
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	DWORD written = GetModuleFileNameA(NULL, buf, len);
+	if (written == 0 || written == len)
+		return false;
+
+	return true;
+}
+
+
+//// Linux
+#elif defined(__linux__)
+
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	if (!getExecPathFromProcfs(buf, len))
+		return false;
+
+	return true;
+}
+
+
+//// Mac OS X, Darwin
+#elif defined(__APPLE__)
+
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	uint32_t lenb = (uint32_t)len;
+	if (_NSGetExecutablePath(buf, &lenb) == -1)
+		return false;
+
+	return true;
+}
+
+
+//// FreeBSD, NetBSD, DragonFlyBSD
+#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
+
+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;
+
+	int mib[4];
+
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_PROC;
+	mib[2] = KERN_PROC_PATHNAME;
+	mib[3] = -1;
+
+	if (sysctl(mib, 4, buf, &len, NULL, 0) == -1)
+		return false;
+
+	return true;
+}
 
-	/*
-		Use platform-specific paths otherwise
-	*/
 
-	infostream<<"Using system-wide paths (NOT RUN_IN_PLACE)"<<std::endl;
+//// Solaris
+#elif defined(__sun) || defined(sun)
 
-	/*
-		Windows
-	*/
-	#if defined(_WIN32)
-		#include <windows.h>
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	const char *exec = getexecname();
+	if (exec == NULL)
+		return false;
+
+	if (strlcpy(buf, exec, len) >= len)
+		return false;
+
+	return true;
+}
+
+
+// HP-UX
+#elif defined(__hpux)
+
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	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;
+}
+
+
+#else
+
+bool getCurrentExecPath(char *buf, size_t len)
+{
+	return false;
+}
+
+#endif
+
+
+//// Windows
+#if defined(_WIN32)
+
+bool setSystemPaths()
+{
+	char buf[BUFSIZ];
 
-	const DWORD buflen = 1000;
-	char buf[buflen];
-	DWORD len;
-	
 	// 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, '\\');
-	
+
 	// Use ".\bin\.."
 	path_share = std::string(buf) + "\\..";
-		
+
 	// Use "C:\Documents and Settings\user\Application Data\<PROJECT_NAME>"
-	len = GetEnvironmentVariable("APPDATA", buf, buflen);
-	assert(len < buflen);
+	DWORD len = GetEnvironmentVariable("APPDATA", buf, sizeof(buf));
+	FATAL_ERROR_IF(len == 0 || len > sizeof(buf), "Failed to get APPDATA");
+
 	path_user = std::string(buf) + DIR_DELIM + PROJECT_NAME;
+	return true;
+}
 
-	/*
-		Linux
-	*/
-	#elif defined(linux)
-		#include <unistd.h>
-	
-	// 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;
+
+//// Linux
+#elif defined(__linux__)
+
+bool setSystemPaths()
+{
+	char buf[BUFSIZ];
+
+	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 != "" && static_sharedir != ".")
+	if (!static_sharedir.empty() && static_sharedir != ".")
 		trylist.push_back(static_sharedir);
-	trylist.push_back(bindir + "/../share/" + PROJECT_NAME);
-	trylist.push_back(bindir + "/..");
-	
-	for(std::list<std::string>::const_iterator i = trylist.begin();
-			i != trylist.end(); i++)
-	{
+
+	trylist.push_back(bindir + DIR_DELIM ".." DIR_DELIM "share"
+		DIR_DELIM + PROJECT_NAME);
+	trylist.push_back(bindir + DIR_DELIM "..");
+
+#ifdef __ANDROID__
+	trylist.push_back(path_user);
+#endif
+
+	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;
+		if (!fs::PathExists(trypath) ||
+			!fs::PathExists(trypath + DIR_DELIM + "builtin")) {
+			warningstream << "system-wide share not found at \""
+					<< trypath << "\""<< std::endl;
 			continue;
 		}
+
 		// Warn if was not the first alternative
-		if(i != trylist.begin()){
-			dstream<<"WARNING: system-wide share found at \""
-					<<trypath<<"\""<<std::endl;
+		if (i != trylist.begin()) {
+			warningstream << "system-wide share found at \""
+					<< trypath << "\"" << std::endl;
 		}
+
 		path_share = trypath;
 		break;
 	}
-	
-	path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
-
-	/*
-		OS X
-	*/
-	#elif defined(__APPLE__)
-		#include <unistd.h>
-
-    // 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";
+
+#ifndef __ANDROID__
+	path_user = std::string(getenv("HOME")) + DIR_DELIM "."
+		+ PROJECT_NAME;
+#endif
+
+	return true;
+}
+
+
+//// Mac OS X
+#elif defined(__APPLE__)
+
+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;
 	}
-	else
-    {
-        // error!
-		dstream<<"WARNING: Could not determine bundle resource path"<<std::endl;
-    }
-    CFRelease(resources_url);
-	
-	path_user = std::string(getenv("HOME")) + "/Library/Application Support/" + PROJECT_NAME;
+	CFRelease(resources_url);
 
-	#elif defined(__FreeBSD__)
+	path_user = std::string(getenv("HOME"))
+		+ "/Library/Application Support/"
+		+ PROJECT_NAME;
+	return true;
+}
+
+
+#else
 
+bool setSystemPaths()
+{
 	path_share = STATIC_SHAREDIR;
-	path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
-    
-	#endif
+	path_user  = std::string(getenv("HOME")) + DIR_DELIM "."
+		+ lowercase(PROJECT_NAME);
+	return true;
+}
 
-#endif // RUN_IN_PLACE
+
+#endif
+
+void migrateCachePath()
+{
+	const std::string local_cache_path = path_user + DIR_DELIM + "cache";
+
+	// 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");
+
+	// 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;
+	}
 }
 
-} //namespace porting
+void initializePaths()
+{
+#if RUN_IN_PLACE
+	char buf[BUFSIZ];
+
+	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 "..";
+		}
+	} 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';
+		}
+
+		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;
+
+	// 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) {
+		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
+
+	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
+	if (STATIC_LOCALEDIR[0] && fs::PathExists(STATIC_LOCALEDIR)) {
+		found_localedir = true;
+		path_locale = STATIC_LOCALEDIR;
+		infostream << "Using locale directory " << STATIC_LOCALEDIR << std::endl;
+	} else {
+		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 "
+				<< "(RUN_IN_PLACE or CUSTOM_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
+}
+
+////
+//// OS-specific Secure Random
+////
+
+#ifdef WIN32
 
+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;
+	}
+#endif
+}
+
+// Load performance counter frequency only once at startup
+#ifdef _WIN32
+
+inline double get_perf_freq()
+{
+	LARGE_INTEGER freq;
+	QueryPerformanceFrequency(&freq);
+	return freq.QuadPart;
+}
+
+double perf_freq = get_perf_freq();
+
+#endif
+
+} //namespace porting