minetest/src/porting.cpp
2015-11-08 15:57:15 -05:00

747 lines
15 KiB
C++

/*
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__)
#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
#if !defined(_WIN32) && !defined(__APPLE__) && \
!defined(__ANDROID__) && !defined(SERVER)
#define XORG_USED
#endif
#ifdef XORG_USED
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#endif
#include "config.h"
#include "debug.h"
#include "filesys.h"
#include "log.h"
#include "util/string.h"
#include "settings.h"
#include <list>
namespace porting
{
/*
Signal handler (grabs Ctrl-C on POSIX systems)
*/
bool g_killed = false;
bool * signal_handler_killstatus(void)
{
return &g_killed;
}
#if !defined(_WIN32) // POSIX
#include <signal.h>
void sigint_handler(int sig)
{
if (!g_killed) {
dstream << "INFO: sigint_handler(): "
<< "Ctrl-C pressed, 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(SIGINT, SIG_DFL);
}
}
void signal_handler_init(void)
{
(void)signal(SIGINT, sigint_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 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\\Debug",
"bin\\Build",
NULL
};
return (removeStringEnd(path, ends) != "");
}
std::string get_sysinfo()
{
#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
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) || defined(__linux) || 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;
}
//// 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
//// 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, '\\');
// Use ".\bin\.."
path_share = std::string(buf) + "\\..";
// Use "C:\Documents and Settings\user\Application Data\<PROJECT_NAME>"
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) || 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 != ".")
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(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;
}
CFRelease(resources_url);
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")) + DIR_DELIM "."
+ lowercase(PROJECT_NAME);
return true;
}
#endif
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;
}
#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;
#endif
infostream << "Detected share path: " << path_share << std::endl;
infostream << "Detected user path: " << path_user << std::endl;
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) {
errorstream << "Couldn't find a locale directory!" << std::endl;
}
}
void setXorgClassHint(const video::SExposedVideoData &video_data,
const std::string &name)
{
#ifdef XORG_USED
if (video_data.OpenGLLinux.X11Display == NULL)
return;
XClassHint *classhint = XAllocClassHint();
classhint->res_name = (char *)name.c_str();
classhint->res_class = (char *)name.c_str();
XSetClassHint((Display *)video_data.OpenGLLinux.X11Display,
video_data.OpenGLLinux.X11Window, classhint);
XFree(classhint);
#endif
}
////
//// Video/Display Information (Client-only)
////
#ifndef SERVER
static irr::IrrlichtDevice *device;
void initIrrlicht(irr::IrrlichtDevice *device_)
{
device = device_;
}
v2u32 getWindowSize()
{
return device->getVideoDriver()->getScreenSize();
}
std::vector<core::vector3d<u32> > getSupportedVideoModes()
{
IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
sanity_check(nulldevice != NULL);
std::vector<core::vector3d<u32> > mlist;
video::IVideoModeList *modelist = nulldevice->getVideoModeList();
u32 num_modes = modelist->getVideoModeCount();
for (u32 i = 0; i != num_modes; i++) {
core::dimension2d<u32> mode_res = modelist->getVideoModeResolution(i);
s32 mode_depth = modelist->getVideoModeDepth(i);
mlist.push_back(core::vector3d<u32>(mode_res.Width, mode_res.Height, mode_depth));
}
nulldevice->drop();
return mlist;
}
std::vector<irr::video::E_DRIVER_TYPE> getSupportedVideoDrivers()
{
std::vector<irr::video::E_DRIVER_TYPE> drivers;
for (int i = 0; i != irr::video::EDT_COUNT; i++) {
if (irr::IrrlichtDevice::isDriverSupported((irr::video::E_DRIVER_TYPE)i))
drivers.push_back((irr::video::E_DRIVER_TYPE)i);
}
return drivers;
}
const char *getVideoDriverName(irr::video::E_DRIVER_TYPE type)
{
static const char *driver_ids[] = {
"null",
"software",
"burningsvideo",
"direct3d8",
"direct3d9",
"opengl",
"ogles1",
"ogles2",
};
return driver_ids[type];
}
const char *getVideoDriverFriendlyName(irr::video::E_DRIVER_TYPE type)
{
static const char *driver_names[] = {
"NULL Driver",
"Software Renderer",
"Burning's Video",
"Direct3D 8",
"Direct3D 9",
"OpenGL",
"OpenGL ES1",
"OpenGL ES2",
};
return driver_names[type];
}
# ifndef __ANDROID__
# ifdef XORG_USED
static float calcDisplayDensity()
{
const char *current_display = getenv("DISPLAY");
if (current_display != NULL) {
Display *x11display = XOpenDisplay(current_display);
if (x11display != NULL) {
/* try x direct */
float dpi_height = floor(DisplayHeight(x11display, 0) /
(DisplayHeightMM(x11display, 0) * 0.039370) + 0.5);
float dpi_width = floor(DisplayWidth(x11display, 0) /
(DisplayWidthMM(x11display, 0) * 0.039370) + 0.5);
XCloseDisplay(x11display);
return std::max(dpi_height,dpi_width) / 96.0;
}
}
/* return manually specified dpi */
return g_settings->getFloat("screen_dpi")/96.0;
}
float getDisplayDensity()
{
static float cached_display_density = calcDisplayDensity();
return cached_display_density;
}
# else // XORG_USED
float getDisplayDensity()
{
return g_settings->getFloat("screen_dpi")/96.0;
}
# endif // XORG_USED
v2u32 getDisplaySize()
{
IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
core::dimension2d<u32> deskres = nulldevice->getVideoModeList()->getDesktopResolution();
nulldevice -> drop();
return deskres;
}
# endif // __ANDROID__
#endif // SERVER
////
//// 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
} //namespace porting