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godot/drivers/unix/os_unix.cpp

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/*************************************************************************/
/* os_unix.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "os_unix.h"
#ifdef UNIX_ENABLED
#include "servers/visual_server.h"
#include "core/os/thread_dummy.h"
#include "mutex_posix.h"
#include "rw_lock_posix.h"
#include "semaphore_posix.h"
#include "thread_posix.h"
//#include "core/io/file_access_buffered_fa.h"
#include "dir_access_unix.h"
#include "file_access_unix.h"
#include "packet_peer_udp_posix.h"
#include "stream_peer_tcp_posix.h"
#include "tcp_server_posix.h"
#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif
#if defined(__FreeBSD__) || defined(__OpenBSD__)
#include <sys/param.h>
#endif
#include "project_settings.h"
#include <assert.h>
#include <dlfcn.h>
#include <errno.h>
#include <poll.h>
#include <signal.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/wait.h>
extern bool _print_error_enabled;
void OS_Unix::print_error(const char *p_function, const char *p_file, int p_line, const char *p_code, const char *p_rationale, ErrorType p_type) {
if (!_print_error_enabled)
return;
const char *err_details;
if (p_rationale && p_rationale[0])
err_details = p_rationale;
else
err_details = p_code;
switch (p_type) {
case ERR_ERROR:
print("\E[1;31mERROR: %s: \E[0m\E[1m%s\n", p_function, err_details);
print("\E[0;31m At: %s:%i.\E[0m\n", p_file, p_line);
break;
case ERR_WARNING:
print("\E[1;33mWARNING: %s: \E[0m\E[1m%s\n", p_function, err_details);
print("\E[0;33m At: %s:%i.\E[0m\n", p_file, p_line);
break;
case ERR_SCRIPT:
print("\E[1;35mSCRIPT ERROR: %s: \E[0m\E[1m%s\n", p_function, err_details);
print("\E[0;35m At: %s:%i.\E[0m\n", p_file, p_line);
break;
case ERR_SHADER:
print("\E[1;36mSHADER ERROR: %s: \E[0m\E[1m%s\n", p_function, err_details);
print("\E[0;36m At: %s:%i.\E[0m\n", p_file, p_line);
break;
}
}
void OS_Unix::debug_break() {
assert(false);
};
int OS_Unix::get_audio_driver_count() const {
return 1;
}
const char *OS_Unix::get_audio_driver_name(int p_driver) const {
return "dummy";
}
int OS_Unix::unix_initialize_audio(int p_audio_driver) {
return 0;
}
// Very simple signal handler to reap processes where ::execute was called with
// !p_blocking
void handle_sigchld(int sig) {
int saved_errno = errno;
while (waitpid((pid_t)(-1), 0, WNOHANG) > 0) {
}
errno = saved_errno;
}
void OS_Unix::initialize_core() {
#ifdef NO_PTHREADS
ThreadDummy::make_default();
SemaphoreDummy::make_default();
MutexDummy::make_default();
#else
ThreadPosix::make_default();
SemaphorePosix::make_default();
MutexPosix::make_default();
RWLockPosix::make_default();
#endif
FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_RESOURCES);
FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_USERDATA);
FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_FILESYSTEM);
//FileAccessBufferedFA<FileAccessUnix>::make_default();
DirAccess::make_default<DirAccessUnix>(DirAccess::ACCESS_RESOURCES);
DirAccess::make_default<DirAccessUnix>(DirAccess::ACCESS_USERDATA);
DirAccess::make_default<DirAccessUnix>(DirAccess::ACCESS_FILESYSTEM);
#ifndef NO_NETWORK
TCPServerPosix::make_default();
StreamPeerTCPPosix::make_default();
PacketPeerUDPPosix::make_default();
IP_Unix::make_default();
#endif
ticks_start = 0;
ticks_start = get_ticks_usec();
struct sigaction sa;
sa.sa_handler = &handle_sigchld;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
if (sigaction(SIGCHLD, &sa, 0) == -1) {
perror("ERROR sigaction() failed:");
}
}
void OS_Unix::finalize_core() {
}
void OS_Unix::vprint(const char *p_format, va_list p_list, bool p_stder) {
if (p_stder) {
vfprintf(stderr, p_format, p_list);
fflush(stderr);
} else {
vprintf(p_format, p_list);
fflush(stdout);
}
}
void OS_Unix::print(const char *p_format, ...) {
va_list argp;
va_start(argp, p_format);
vprintf(p_format, argp);
va_end(argp);
}
void OS_Unix::alert(const String &p_alert, const String &p_title) {
fprintf(stderr, "ERROR: %s\n", p_alert.utf8().get_data());
}
static int has_data(FILE *p_fd, int timeout_usec = 0) {
fd_set readset;
int fd = fileno(p_fd);
FD_ZERO(&readset);
FD_SET(fd, &readset);
timeval time;
time.tv_sec = 0;
time.tv_usec = timeout_usec;
int res = 0; //select(fd + 1, &readset, NULL, NULL, &time);
return res > 0;
};
String OS_Unix::get_stdin_string(bool p_block) {
String ret;
if (p_block) {
char buff[1024];
ret = stdin_buf + fgets(buff, 1024, stdin);
stdin_buf = "";
return ret;
};
while (has_data(stdin)) {
char ch;
read(fileno(stdin), &ch, 1);
if (ch == '\n') {
ret = stdin_buf;
stdin_buf = "";
return ret;
} else {
char str[2] = { ch, 0 };
stdin_buf += str;
};
};
return "";
}
String OS_Unix::get_name() {
return "Unix";
}
uint64_t OS_Unix::get_unix_time() const {
return time(NULL);
};
uint64_t OS_Unix::get_system_time_secs() const {
struct timeval tv_now;
gettimeofday(&tv_now, NULL);
//localtime(&tv_now.tv_usec);
//localtime((const long *)&tv_now.tv_usec);
return uint64_t(tv_now.tv_sec);
}
OS::Date OS_Unix::get_date(bool utc) const {
time_t t = time(NULL);
struct tm *lt;
if (utc)
lt = gmtime(&t);
else
lt = localtime(&t);
Date ret;
ret.year = 1900 + lt->tm_year;
// Index starting at 1 to match OS_Unix::get_date
// and Windows SYSTEMTIME and tm_mon follows the typical structure
// of 0-11, noted here: http://www.cplusplus.com/reference/ctime/tm/
ret.month = (Month)(lt->tm_mon + 1);
ret.day = lt->tm_mday;
ret.weekday = (Weekday)lt->tm_wday;
ret.dst = lt->tm_isdst;
return ret;
}
OS::Time OS_Unix::get_time(bool utc) const {
time_t t = time(NULL);
struct tm *lt;
if (utc)
lt = gmtime(&t);
else
lt = localtime(&t);
Time ret;
ret.hour = lt->tm_hour;
ret.min = lt->tm_min;
ret.sec = lt->tm_sec;
get_time_zone_info();
return ret;
}
OS::TimeZoneInfo OS_Unix::get_time_zone_info() const {
time_t t = time(NULL);
struct tm *lt = localtime(&t);
char name[16];
strftime(name, 16, "%Z", lt);
name[15] = 0;
TimeZoneInfo ret;
ret.name = name;
char bias_buf[16];
strftime(bias_buf, 16, "%z", lt);
int bias;
bias_buf[15] = 0;
sscanf(bias_buf, "%d", &bias);
// convert from ISO 8601 (1 minute=1, 1 hour=100) to minutes
int hour = (int)bias / 100;
int minutes = bias % 100;
if (bias < 0)
ret.bias = hour * 60 - minutes;
else
ret.bias = hour * 60 + minutes;
return ret;
}
void OS_Unix::delay_usec(uint32_t p_usec) const {
struct timespec rem = { p_usec / 1000000, (p_usec % 1000000) * 1000 };
while (nanosleep(&rem, &rem) == EINTR) {
}
}
uint64_t OS_Unix::get_ticks_usec() const {
struct timeval tv_now;
gettimeofday(&tv_now, NULL);
uint64_t longtime = (uint64_t)tv_now.tv_usec + (uint64_t)tv_now.tv_sec * 1000000L;
longtime -= ticks_start;
return longtime;
}
Error OS_Unix::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode) {
if (p_blocking && r_pipe) {
String argss;
argss = "\"" + p_path + "\"";
for (int i = 0; i < p_arguments.size(); i++) {
argss += String(" \"") + p_arguments[i] + "\"";
}
argss += " 2>/dev/null"; //silence stderr
FILE *f = popen(argss.utf8().get_data(), "r");
ERR_FAIL_COND_V(!f, ERR_CANT_OPEN);
char buf[65535];
while (fgets(buf, 65535, f)) {
(*r_pipe) += buf;
}
int rv = pclose(f);
if (r_exitcode)
*r_exitcode = rv;
return OK;
}
pid_t pid = fork();
ERR_FAIL_COND_V(pid < 0, ERR_CANT_FORK);
if (pid == 0) {
// is child
Vector<CharString> cs;
cs.push_back(p_path.utf8());
for (int i = 0; i < p_arguments.size(); i++)
cs.push_back(p_arguments[i].utf8());
Vector<char *> args;
for (int i = 0; i < cs.size(); i++)
args.push_back((char *)cs[i].get_data()); // shitty C cast
args.push_back(0);
#ifdef __FreeBSD__
if (p_path.find("/")) {
// exec name contains path so use it
execv(p_path.utf8().get_data(), &args[0]);
} else {
// use program name and search through PATH to find it
execvp(getprogname(), &args[0]);
}
#else
execv(p_path.utf8().get_data(), &args[0]);
#endif
// still alive? something failed..
fprintf(stderr, "**ERROR** OS_Unix::execute - Could not create child process while executing: %s\n", p_path.utf8().get_data());
abort();
}
if (p_blocking) {
int status;
waitpid(pid, &status, 0);
if (r_exitcode)
*r_exitcode = WEXITSTATUS(status);
} else {
if (r_child_id)
*r_child_id = pid;
}
return OK;
}
Error OS_Unix::kill(const ProcessID &p_pid) {
int ret = ::kill(p_pid, SIGKILL);
if (!ret) {
//avoid zombie process
int st;
::waitpid(p_pid, &st, 0);
}
return ret ? ERR_INVALID_PARAMETER : OK;
}
int OS_Unix::get_process_id() const {
return getpid();
};
bool OS_Unix::has_environment(const String &p_var) const {
return getenv(p_var.utf8().get_data()) != NULL;
}
String OS_Unix::get_locale() const {
if (!has_environment("LANG"))
return "en";
String locale = get_environment("LANG");
int tp = locale.find(".");
if (tp != -1)
locale = locale.substr(0, tp);
return locale;
}
Error OS_Unix::open_dynamic_library(const String p_path, void *&p_library_handle) {
p_library_handle = dlopen(p_path.utf8().get_data(), RTLD_NOW);
if (!p_library_handle) {
ERR_EXPLAIN("Can't open dynamic library: " + p_path + ". Error: " + dlerror());
ERR_FAIL_V(ERR_CANT_OPEN);
}
return OK;
}
Error OS_Unix::close_dynamic_library(void *p_library_handle) {
if (dlclose(p_library_handle)) {
return FAILED;
}
return OK;
}
Error OS_Unix::get_dynamic_library_symbol_handle(void *p_library_handle, const String p_name, void *&p_symbol_handle, bool p_optional) {
const char *error;
dlerror(); // Clear existing errors
p_symbol_handle = dlsym(p_library_handle, p_name.utf8().get_data());
error = dlerror();
if (error != NULL) {
if (!p_optional) {
ERR_EXPLAIN("Can't resolve symbol " + p_name + ". Error: " + error);
ERR_FAIL_V(ERR_CANT_RESOLVE);
} else {
return ERR_CANT_RESOLVE;
}
}
return OK;
}
Error OS_Unix::set_cwd(const String &p_cwd) {
if (chdir(p_cwd.utf8().get_data()) != 0)
return ERR_CANT_OPEN;
return OK;
}
String OS_Unix::get_environment(const String &p_var) const {
if (getenv(p_var.utf8().get_data()))
return getenv(p_var.utf8().get_data());
return "";
}
int OS_Unix::get_processor_count() const {
return sysconf(_SC_NPROCESSORS_CONF);
}
String OS_Unix::get_data_dir() const {
String an = get_safe_application_name();
if (an != "") {
if (has_environment("HOME")) {
bool use_godot = ProjectSettings::get_singleton()->get("application/config/use_shared_user_dir");
if (use_godot)
return get_environment("HOME") + "/.godot/app_userdata/" + an;
else
return get_environment("HOME") + "/." + an;
}
}
return ProjectSettings::get_singleton()->get_resource_path();
}
String OS_Unix::get_installed_templates_path() const {
String p = get_global_settings_path();
if (p != "")
return p + "/templates/";
else
return "";
}
String OS_Unix::get_executable_path() const {
#ifdef __linux__
//fix for running from a symlink
char buf[256];
memset(buf, 0, 256);
readlink("/proc/self/exe", buf, sizeof(buf));
String b;
b.parse_utf8(buf);
if (b == "") {
WARN_PRINT("Couldn't get executable path from /proc/self/exe, using argv[0]");
return OS::get_executable_path();
}
return b;
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
char resolved_path[MAXPATHLEN];
realpath(OS::get_executable_path().utf8().get_data(), resolved_path);
return String(resolved_path);
#elif defined(__APPLE__)
char temp_path[1];
uint32_t buff_size = 1;
_NSGetExecutablePath(temp_path, &buff_size);
char *resolved_path = new char[buff_size + 1];
if (_NSGetExecutablePath(resolved_path, &buff_size) == 1)
WARN_PRINT("MAXPATHLEN is too small");
String path(resolved_path);
delete[] resolved_path;
return path;
#else
ERR_PRINT("Warning, don't know how to obtain executable path on this OS! Please override this function properly.");
return OS::get_executable_path();
#endif
}
#endif
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