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gene/*
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
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
Random portability stuff
See comments in porting.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>
#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 "config.h"
#include "debug.h"
#include "filesys.h"
#include "log.h"
#include "util/string.h"
#include <list>
#include <cstdarg>
#include <cstdio>
namespace porting
{
/*
Signal handler (grabs Ctrl-C on POSIX systems)
*/
bool g_killed = false;
bool *signal_handler_killstatus()
{
return &g_killed;
}
#if !defined(_WIN32) // POSIX
#include <signal.h>
void signal_handler(int sig)
{
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 << "INFO: sigint_handler(): "
<< "Printing debug stacks" << std::endl;
debug_stacks_print();*/
g_killed = true;
} else {
(void)signal(sig, SIG_DFL);
}
}
void signal_handler_init(void)
{
(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) {
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);
}
break;
case CTRL_BREAK_EVENT:
break;
}
return TRUE;
}
void signal_handler_init(void)
{
SetConsoleCtrlHandler((PHANDLER_ROUTINE)event_handler, TRUE);
}
#endif
/*
Path mangler
*/
// 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());
}
std::string get_sysinfo()
{
#ifdef _WIN32
std::ostringstream oss;
LPSTR filePath = new char[MAX_PATH];
UINT blockSize;
VS_FIXEDFILEINFO *fixedFileInfo;
GetSystemDirectoryA(filePath, MAX_PATH);
PathAppendA(filePath, "kernel32.dll");
DWORD dwVersionSize = GetFileVersionInfoSizeA(filePath, NULL);
LPBYTE lpVersionInfo = new BYTE[dwVersionSize];
GetFileVersionInfoA(filePath, 0, dwVersionSize, lpVersionInfo);
VerQueryValueA(lpVersionInfo, "\\", (LPVOID *)&fixedFileInfo, &blockSize);
oss << "Windows/"
<< HIWORD(fixedFileInfo->dwProductVersionMS) << '.' // Major
<< LOWORD(fixedFileInfo->dwProductVersionMS) << '.' // Minor
<< HIWORD(fixedFileInfo->dwProductVersionLS) << ' '; // Build
#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
delete[] lpVersionInfo;
delete[] filePath;
return oss.str();
#else
struct utsname osinfo;
uname(&osinfo);
return std::string(osinfo.sysname) + "/"
+ osinfo.release + " " + osinfo.machine;
#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)
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;
}
#elif defined(__HAIKU__)
bool getCurrentExecPath(char *buf, size_t len)
{
return find_path(B_APP_IMAGE_SYMBOL, B_FIND_PATH_IMAGE_PATH, NULL, buf, len) == B_OK;
}
//// Solaris
#elif defined(__sun) || defined(sun)
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
//// Non-Windows
#if !defined(_WIN32)
const char *getHomeOrFail()
{
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
//// Windows
#if defined(_WIN32)
bool setSystemPaths()
{
char buf[BUFSIZ];
// Find path of executable and set path_share relative to it
FATAL_ERROR_IF(!getCurrentExecPath(buf, sizeof(buf)),
"Failed to get current executable path");
pathRemoveFile(buf, '\\');
std::string exepath(buf);
// 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 "..";
}
// 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");
path_user = std::string(buf) + DIR_DELIM + PROJECT_NAME_C;
return true;
}
//// Linux
#elif defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
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.empty() && static_sharedir != ".")
trylist.push_back(static_sharedir);
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 + 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()) {
warningstream << "system-wide share found at \""
<< trypath << "\"" << std::endl;
}
path_share = trypath;
break;
}
#ifndef __ANDROID__
path_user = std::string(getHomeOrFail()) + 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;
}
CFRelease(resources_url);
path_user = std::string(getHomeOrFail())
+ "/Library/Application Support/"
+ PROJECT_NAME;
return true;
}
#else
bool setSystemPaths()
{
path_share = STATIC_SHAREDIR;
path_user = std::string(getHomeOrFail()) + DIR_DELIM "."
+ lowercase(PROJECT_NAME);
return true;
}
#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;
}
}
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;
# 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) {
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
}
////
//// 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$", "w", stderr);
consoleAllocated = true;
}
#endif
}
int mt_snprintf(char *buf, const size_t buf_size, const char *fmt, ...)
{
// https://msdn.microsoft.com/en-us/library/bt7tawza.aspx
// Many of the MSVC / Windows printf-style functions do not support positional
// arguments (eg. "%1$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;
}
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;
}
#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
}
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;
}
return open_uri(url);
}
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()
{
LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);
return freq.QuadPart;
}
double perf_freq = get_perf_freq();
#endif
} //namespace porting
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