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sys_unix.c
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sys_unix.c
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/*
===========================================================================
Copyright (C) 2010-2013 Ninja and TheKelm
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of CoD4X18-Server source code.
CoD4X18-Server source code is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
CoD4X18-Server source code 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>
===========================================================================
*/
#include "../q_shared.h"
#include "../q_platform.h"
#include "../qcommon_mem.h"
#include "../qcommon_io.h"
#include "../qcommon.h"
#include "../sys_main.h"
#include "../cmd.h"
#include "../sys_cod4defs.h"
#include "../sys_thread.h"
#include "sys_unix.h"
#include <sys/resource.h>
#include <libgen.h>
#include <signal.h>
#include <sys/mman.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <dlfcn.h>
#include <dirent.h>
#include <sys/stat.h>
#include <pwd.h>
#include <execinfo.h>
#include <sys/time.h>
#include <pthread.h>
#include <stdatomic.h>
void Sys_InitThreadContext();
/*
==================
Sys_RandomBytes
==================
*/
qboolean Sys_RandomBytes( byte *string, int len )
{
FILE *fp;
fp = fopen( "/dev/urandom", "r" );
if( !fp )
return qfalse;
if( !fread( string, sizeof( byte ), len, fp ) )
{
fclose( fp );
return qfalse;
}
fclose( fp );
return qtrue;
}
unsigned int Sys_MillisecondsRaw( void )
{
struct timeval tp;
gettimeofday( &tp, NULL );
return tp.tv_sec * 1000 + tp.tv_usec / 1000;
}
void Sys_ReplaceProcess( char *cmdline )
{
int i;
char *argv[256];
Cmd_TokenizeString(cmdline);
if(Cmd_Argc() < 256)
{
for(i = 0; i < Cmd_Argc(); i++)
{
argv[i] = CopyString(Cmd_Argv(i));
}
argv[i] = NULL;
execv( argv[0], argv );
Com_PrintError(CON_CHANNEL_SYSTEM, "Sys_ReplaceProcess: execv failed: %s\n", strerror( errno ) );
}else{
Com_PrintError(CON_CHANNEL_SYSTEM, "Sys_ReplaceProcess: Exceeded limit of 256 commandline arguments.\nCommandline is: %s\n", cmdline);
}
Cmd_EndTokenizedString();
_exit( 0 );
}
/*
==================
Sys_Dirname
==================
*/
/* Not changes passed path. */
const char *Sys_Dirname(const char *path)
{
static char dir[MAX_OSPATH];
mvabuf;
strncpy(dir, path, MAX_OSPATH);
dirname(dir);
return dir;
}
/*
==================
Sys_Cwd
==================
*/
char *Sys_Cwd( void )
{
static char cwd[MAX_OSPATH];
char *result = getcwd( cwd, sizeof( cwd ) - 1 );
if( result != cwd )
return NULL;
cwd[MAX_OSPATH-1] = 0;
return cwd;
}
void Sys_InitCrashDumps(){
// core dumps may be disallowed by parent of this process; change that
struct rlimit core_limit;
core_limit.rlim_cur = RLIM_INFINITY;
core_limit.rlim_max = RLIM_INFINITY;
if (setrlimit(RLIMIT_CORE, &core_limit) < 0)
Com_PrintWarning(CON_CHANNEL_SYSTEM,"setrlimit: %s\nCore dumps may be truncated or non-existant\n", strerror(errno));
}
qboolean Sys_MemoryProtectWrite(void* startoffset, int len)
{
if(mprotect((char*)startoffset - ((int)startoffset % getpagesize()), len + (len % getpagesize()), PROT_READ | PROT_WRITE) != 0)
{
perror("Sys_MemoryProtectWrite: mprotect change memory to writable error");
return qfalse;
}
return qtrue;
}
qboolean Sys_MemoryProtectExec(void* startoffset, int len)
{
if(mprotect((char*)startoffset - ((int)startoffset % getpagesize()), len + (len % getpagesize()), PROT_READ | PROT_EXEC) != 0)
{
perror("Sys_MemoryProtectExec: mprotect change memory to readonly/execute error");
return qfalse;
}
return qtrue;
}
qboolean Sys_MemoryProtectReadonly(void* startoffset, int len)
{
if(mprotect((char*)startoffset - ((int)startoffset % getpagesize()), len + (len % getpagesize()), PROT_READ) != 0)
{
perror("Sys_MemoryProtectReadonly: mprotect change memory to readonly error");
return qfalse;
}
return qtrue;
}
/*
==============================================================
DIRECTORY SCANNING
==============================================================
*/
#define MAX_FOUND_FILES 0x1000
/*
==================
Sys_ListFilteredFiles
==================
*/
void Sys_ListFilteredFiles( const char *basedir, char *subdirs, char *filter, char **list, int *numfiles )
{
char search[MAX_OSPATH], newsubdirs[MAX_OSPATH];
char filename[MAX_OSPATH];
DIR *fdir;
struct dirent *d;
struct stat st;
if ( *numfiles >= MAX_FOUND_FILES - 1 ) {
return;
}
if (strlen(subdirs)) {
Com_sprintf( search, sizeof(search), "%s/%s", basedir, subdirs );
}
else {
Com_sprintf( search, sizeof(search), "%s", basedir );
}
if ((fdir = opendir(search)) == NULL) {
return;
}
while ((d = readdir(fdir)) != NULL) {
Com_sprintf(filename, sizeof(filename), "%s/%s", search, d->d_name);
if (stat(filename, &st) == -1)
continue;
if (st.st_mode & S_IFDIR) {
if (Q_stricmp(d->d_name, ".") && Q_stricmp(d->d_name, "..")) {
if (strlen(subdirs)) {
Com_sprintf( newsubdirs, sizeof(newsubdirs), "%s/%s", subdirs, d->d_name);
}
else {
Com_sprintf( newsubdirs, sizeof(newsubdirs), "%s", d->d_name);
}
Sys_ListFilteredFiles( basedir, newsubdirs, filter, list, numfiles );
}
}
if ( *numfiles >= MAX_FOUND_FILES - 1 ) {
break;
}
Com_sprintf( filename, sizeof(filename), "%s/%s", subdirs, d->d_name );
if (!Com_FilterPath( filter, filename, qfalse ))
continue;
list[ *numfiles ] = CopyString( filename );
(*numfiles)++;
}
closedir(fdir);
}
/*
==================
Sys_ListFiles
==================
*/
char **Sys_ListFiles( const char *directory, const char *extension, char *filter, int *numfiles, qboolean wantsubs )
{
/*Looks like the includefile sys/stat.h has a wrong type size. Bugfix */
struct stat_size_fix
{
struct stat st;
int guard1;
int guard2;
};
struct dirent *d;
DIR *fdir;
qboolean dironly = wantsubs;
char search[MAX_OSPATH];
int nfiles;
char **listCopy;
char *list[MAX_FOUND_FILES];
int i;
struct stat_size_fix st;
int extLen;
if (filter) {
nfiles = 0;
Sys_ListFilteredFiles( directory, "", filter, list, &nfiles );
list[ nfiles ] = NULL;
*numfiles = nfiles;
if (!nfiles)
return NULL;
listCopy = Z_Malloc( ( nfiles + 1 ) * sizeof( *listCopy ) );
for ( i = 0 ; i < nfiles ; i++ ) {
listCopy[i] = list[i];
}
listCopy[i] = NULL;
return listCopy;
}
if ( !extension)
extension = "";
if ( extension[0] == '/' && extension[1] == 0 ) {
extension = "";
dironly = qtrue;
}
extLen = strlen( extension );
// search
nfiles = 0;
if ((fdir = opendir(directory)) == NULL) {
*numfiles = 0;
return NULL;
}
while ((d = readdir(fdir)) != NULL) {
Com_sprintf(search, sizeof(search), "%s/%s", directory, d->d_name);
if (stat(search, &st.st) == -1)
continue;
if ((dironly && !(st.st.st_mode & S_IFDIR)) ||
(!dironly && (st.st.st_mode & S_IFDIR)))
continue;
if (*extension) {
if ( strlen( d->d_name ) < extLen ||
Q_stricmp(
d->d_name + strlen( d->d_name ) - extLen,
extension ) ) {
continue; // didn't match
}
}
if ( nfiles == MAX_FOUND_FILES - 1 )
break;
list[ nfiles ] = CopyString( d->d_name );
nfiles++;
}
list[ nfiles ] = NULL;
closedir(fdir);
// return a copy of the list
*numfiles = nfiles;
if ( !nfiles ) {
return NULL;
}
listCopy = S_Malloc( ( nfiles + 1 ) * sizeof( *listCopy ) );
for ( i = 0 ; i < nfiles ; i++ ) {
listCopy[i] = list[i];
}
listCopy[i] = NULL;
return listCopy;
}
qboolean Sys_DirectoryHasContent(const char *dir)
{
DIR *hdir;
struct dirent *hfiles;
hdir = opendir(dir);
if ( hdir )
{
hfiles = readdir(hdir);
while ( hfiles )
{
if ( hfiles->d_reclen != 4 || hfiles->d_name[0] != '.' )
{
closedir(hdir);
return qtrue;
}
hfiles = readdir(hdir);
}
closedir(hdir);
}
return qfalse;
}
/*
==================
Sys_FreeFileList
==================
*/
void Sys_FreeFileList( char **list )
{
int i;
if ( !list ) {
return;
}
for ( i = 0 ; list[i] ; i++ ) {
FreeString( list[i] );
}
Z_Free( list );
}
/*
================
Sys_GetUsername
================
*/
const char* Sys_GetUsername()
{
struct passwd *passwdstr = getpwuid(getuid());
if(passwdstr == NULL)
return "CoD-Admin";
return passwdstr->pw_name;
}
int main(int argc, char* argv[])
{
int i;
uid_t uid = getuid();
if( uid == 0 || uid != geteuid() ) { // warn user that he/she's operating as a privliged user
Com_Printf(CON_CHANNEL_SYSTEM, "********************************************************\n" );
Com_Printf(CON_CHANNEL_SYSTEM, "***** RUNNING SERVER AS A ROOT IS GENERALLY UNSAFE *****\n" );
Com_Printf(CON_CHANNEL_SYSTEM, "********************************************************\n\n" );
}
// go back to real user for config loads
seteuid( uid );
char commandLine[MAX_STRING_CHARS];
commandLine[0] = 0;
// Concatenate the command line for passing to Com_Init
for( i = 1; i < argc; i++ )
{
const qboolean containsSpaces = strchr(argv[i], ' ') != NULL;
if (containsSpaces)
Q_strncat( commandLine, sizeof( commandLine ), "\"" );
Q_strncat( commandLine, sizeof( commandLine ), argv[ i ] );
if (containsSpaces)
Q_strncat( commandLine, sizeof( commandLine ), "\"" );
Q_strncat( commandLine, sizeof( commandLine ), " " );
}
Sys_SetExeFile( argv[ 0 ] );
const char* find = strrchr( argv[0], '/' );
if(find)
{
Sys_SetExeFileShort( find +1 );
}else{
Sys_SetExeFileShort( argv[0] );
}
/* This function modifies argv[ 0 ] :S */
Sys_SetBinaryPath( Sys_Dirname( argv[ 0 ] ) );
Sys_InitThreadContext();
return Sys_Main(commandLine);
}
/*
==================
Sys_Basename
==================
*/
const char *Sys_Basename( char *path )
{
return basename( path );
}
/*
==================
Sys_Mkdir
==================
*/
qboolean Sys_Mkdir( const char *path )
{
int result = mkdir( path, 0750 );
if( result != 0 )
return errno == EEXIST;
return qtrue;
}
qboolean Sys_SetPermissionsExec(const char* ospath)
{
if(chmod(ospath, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)!=0){
return qfalse;
}
return qtrue;
}
/*
==================
Sys_SleepSec
==================
*/
void Sys_SleepMSec(int msec)
{
struct timespec ts;
ts.tv_sec = msec / 1000;
ts.tv_nsec = (msec % 1000) * 1000000;
nanosleep(&ts, NULL);
}
void Sys_SleepSec(int seconds)
{
struct timespec ts;
ts.tv_sec = seconds;
ts.tv_nsec = 0;
nanosleep(&ts, NULL);
}
void Sys_SleepUSec(int usec)
{
usleep(usec);
}
void Sys_EventLoop()
{
}
void Sys_WaitForErrorConfirmation(const char* error)
{
}
void* currentLibHandle = NULL;
void Sys_LoadLibraryError(char* errormessage, int maxlen)
{
const char* pterror = dlerror();
if(pterror == NULL)
{
Q_strncpyz(errormessage, "no error occurred while loading shared library", maxlen);
return;
}
Q_strncpyz(errormessage, pterror, maxlen);
}
void* Sys_LoadLibrary(const char* dlfile)
{
void* handle = dlopen(dlfile, RTLD_LAZY);
currentLibHandle = handle;
if(handle == NULL)
{
Com_PrintError(CON_CHANNEL_SYSTEM,"Sys_LoadLibrary error: %s\n", dlerror());
}
return handle;
}
void* Sys_GetProcedure(const char* lpProcName)
{
if(currentLibHandle == NULL)
{
Com_Error(ERR_FATAL, "Attempt to get ProcAddress from invalid or not loaded library");
return NULL;
}
void* procedure = dlsym( currentLibHandle, lpProcName );
return procedure;
}
void Sys_CloseLibrary(void* hModule)
{
if(hModule == NULL)
{
Com_Error(ERR_FATAL, "Attempt to close not loaded library");
return;
}
if(hModule == currentLibHandle)
{
currentLibHandle = NULL;
}
dlclose(hModule);
}
#define MIN_STACKSIZE 256*1024
qboolean Sys_CreateNewThread(void* (*ThreadMain)(void*), threadid_t *tid, void* arg)
{
int err;
pthread_attr_t tattr;
err = pthread_attr_init(&tattr);
if(err != 0)
{
Com_PrintError(CON_CHANNEL_SYSTEM,"pthread_attr_init(): Thread creation failed with the following error: %s\n", strerror(errno));
return qfalse;
}
err = pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED);
if(err != 0)
{
pthread_attr_destroy(&tattr);
Com_PrintError(CON_CHANNEL_SYSTEM,"pthread_attr_setdetachstate(): Thread creation failed with the following error: %s\n", strerror(errno));
return qfalse;
}
err = pthread_attr_setstacksize(&tattr, MIN_STACKSIZE);
if(err != 0)
{
pthread_attr_destroy(&tattr);
Com_PrintError(CON_CHANNEL_SYSTEM,"pthread_attr_setstacksize(): Thread creation failed with the following error: %s\n", strerror(errno));
return qfalse;
}
err = pthread_create(tid, &tattr, ThreadMain, arg);
if(err != 0)
{
pthread_attr_destroy(&tattr);
Com_PrintError(CON_CHANNEL_SYSTEM,"pthread_create(): Thread creation failed with the following error: %s\n", strerror(errno));
return qfalse;
}
pthread_attr_destroy(&tattr);
return qtrue;
}
//Just for Win32 code compatibility
threadid_t Sys_CreateThreadWithHandle(void* (*ThreadMain)(void*), threadid_t *tid, void* arg)
{
if(Sys_CreateNewThread(ThreadMain, tid, arg))
{
return *tid;
}
return 0;
}
static pthread_mutex_t crit_sections[CRITSECT_COUNT];
threadid_t mainthread;
void Sys_InitializeCriticalSections( void )
{
int i;
pthread_mutexattr_t muxattr;
pthread_mutexattr_init(&muxattr);
pthread_mutexattr_settype(&muxattr, PTHREAD_MUTEX_RECURSIVE);
for (i = 0; i < CRITSECT_COUNT; i++) {
pthread_mutex_init( &crit_sections[i], &muxattr );
}
pthread_mutexattr_destroy(&muxattr);
}
void __cdecl Sys_EnterCriticalSectionInternal(int section)
{
pthread_mutex_lock(&crit_sections[section]);
}
void __cdecl Sys_LeaveCriticalSectionInternal(int section)
{
pthread_mutex_unlock(&crit_sections[section]);
}
qboolean __cdecl Sys_IsMainThread( void )
{
return Sys_ThreadisSame(mainthread);
}
qboolean Sys_ThreadisSame(threadid_t threadid)
{
threadid_t thread = pthread_self();
return pthread_equal(threadid, thread) != 0;
}
threadid_t Sys_GetCurrentThreadId( )
{
threadid_t thread = pthread_self();
return thread;
}
void Sys_ExitThread(int code)
{
pthread_exit(&code);
}
void __noreturn Sys_ExitForOS( int exitCode )
{
exit(exitCode);
}
int Sys_Chmod(const char* file, int mode)
{
return chmod(file, mode);
}
void* Sys_RunNewProcess(void* arg)
{
char cmdline[4096];
Q_strncpyz(cmdline, (const char*)arg, sizeof(cmdline));
free(arg);
system(cmdline);
return NULL;
}
void Sys_DoStartProcess( char *cmdline ) {
threadid_t tid;
void* mcmdline = (void*)strdup(cmdline);
if(mcmdline == NULL)
{
return;
}
if(Sys_CreateNewThread(Sys_RunNewProcess, &tid, mcmdline) == qfalse)
{
free(mcmdline);
}
}
typedef struct
{
char magic[8];
void* realstart;
void* virtualstart;
int realsize;
int virtualsize;
int allocType;
int protect;
}VirtualAllocInfo_t;
void *__cdecl _VirtualAlloc(void *address, int dwSize, int flAllocationType, int flProtect)
{
int pagesize = 0x1000;
void *unaligned;
int realsize;
if ( !address )
{
realsize = dwSize + pagesize + sizeof(VirtualAllocInfo_t);
unaligned = calloc(1, realsize);
if(unaligned == NULL)
{
return NULL;
}
address = (void*)( (unsigned int)unaligned & ~(pagesize -1));
address += pagesize;
if(unaligned + sizeof(VirtualAllocInfo_t) > address)
{
address += pagesize;
}
VirtualAllocInfo_t *meminfo = (VirtualAllocInfo_t *)((byte*)address - sizeof(VirtualAllocInfo_t));
meminfo->realstart = unaligned;
meminfo->virtualstart = address;
meminfo->realsize = realsize;
meminfo->virtualsize = dwSize;
meminfo->allocType = flAllocationType;
meminfo->protect = flProtect;
memcpy(meminfo->magic, "VIRALLOC", sizeof(meminfo->magic));
}else{
// Com_Printf(CON_CHANNEL_SYSTEM,"VirtualAlloc with address != NULL\nNeed fix to handle VirtualAlloc COMMIT/RESERVE\n");
}
return address;
}
bool __cdecl _VirtualFree(void* lpAddress, int dwSize, uint32_t dwFreeType)
{
if ( lpAddress && dwFreeType == 0x8000 )
{
VirtualAllocInfo_t *meminfo = (VirtualAllocInfo_t *)((byte*)lpAddress - sizeof(VirtualAllocInfo_t));
if(meminfo->realstart == NULL || memcmp(meminfo->magic, "VIRALLOC", sizeof(meminfo->magic)))
{
Com_Error(ERR_FATAL, "VirtualFree with invalid handle\n");
return false;
}
free(meminfo->realstart);
return true;
}
else
{
// Com_Error(ERR_FATAL, "VirtualFree without address or type != 0x8000");
}
return false;
}
DWORD __cdecl Sys_InterlockedDecrement(DWORD volatile *Addend)
{
return atomic_fetch_sub(Addend, 1) -1;
}
DWORD __cdecl Sys_InterlockedIncrement(DWORD volatile *Addend)
{
return atomic_fetch_add(Addend, 1) +1;
}
DWORD __cdecl Sys_InterlockedCompareExchange(DWORD volatile *Destination, DWORD Exchange, DWORD Comparand)
{
return __sync_val_compare_and_swap(Destination, Comparand, Exchange);
}
DWORD __cdecl Sys_InterlockedExchangeAdd(DWORD volatile *Addend, DWORD value)
{
return atomic_fetch_add(Addend, value);
}
int __cdecl _SleepEx(int dwMilliseconds, BOOL alert)
{
return 0;
}
#pragma GCC diagnostic ignored "-Wmultichar"
typedef struct
{
DWORD type;
union
{
FILE* fh;
pthread_mutex_t mutex;
};
pthread_cond_t cond;
qboolean manualreset;
qboolean signaled;
char name[32];
}hObject_t;
BOOL __cdecl _CloseHandle(HANDLE handle)
{
hObject_t *hObject = (hObject_t *)handle;
if ( hObject->type == 'File' )
{
if ( hObject->fh )
{
fclose(hObject->fh);
hObject->fh = 0;
}
hObject->type = 'DEAD';
// _ZdlPv_stub(hObject);
free(hObject);
return TRUE;
}else if(hObject->type == 'Evnt'){
hObject->type = 'DEAD';
pthread_mutex_destroy(&hObject->mutex);
free(hObject);
return TRUE;
}
return FALSE;
}
DWORD sLastError;
DWORD __cdecl _GetLastError()
{
DWORD result;
result = sLastError;
sLastError = 0;
return result;
}
void __cdecl _SetLastError(DWORD error_val)
{
sLastError = error_val;
}
BOOL __cdecl _ReadFileEx(HANDLE handle, void *lpBuffer, int nNumberOfBytesToRead, struct _OVERLAPPED *lpOverlapped, void (__stdcall *lpCompletionRoutine)(long unsigned int, long unsigned int, struct _OVERLAPPED*))
{
sLastError = 0;
hObject_t *hObject = (hObject_t*)handle;
if ( hObject->type != 'File' )
{
return FALSE;
}
if ( fseek(hObject->fh, lpOverlapped->Offset, 0) )
{
if(feof(hObject->fh))
{
_SetLastError(38); //EOF error
}else{
_SetLastError(25); //Seek error
}
return FALSE;
}
if((signed int)fread(lpBuffer, 1u, nNumberOfBytesToRead, hObject->fh) <= 0)
{
if(feof(hObject->fh))
{
_SetLastError(38);
}else{
_SetLastError(30); //Read fault
}
return FALSE;
}
return TRUE;
}
FILE* NixFOpen(const char* filen, const char* mode)
{
unsigned int i;
char filename[1024];
if(*filen == 0)
{
return NULL;
}
for(i = 0; i < sizeof(filename) -1 && filen[i]; ++i)
{
filename[i] = filen[i];
if(filename[i] == '\\')
{
filename[i] = '/';
}
}
filename[i] = '\0';
return fopen(filename, mode);
}
HANDLE __cdecl _CreateFileA(char *lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode, void *lpSecurityAttributes, DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, HANDLE hTemplateFile)
{
FILE *fh;
hObject_t *ho;
fh = NixFOpen(lpFileName, "rb");
if ( fh )
{
ho = malloc(sizeof(hObject_t));
if(ho == NULL)
{
fclose(fh);
return (HANDLE)-1;
}
ho->type = 'File';
ho->fh = fh;
return (HANDLE)ho;
}
return (HANDLE)-1;
}
DWORD __cdecl _GetFileSize(HANDLE handle, DWORD *lpFileSizeHigh)
{
uint32_t current;
DWORD size;
hObject_t *hFile = (hObject_t*)handle;
if ( hFile->type == 'File' )
{
current = ftell(hFile->fh);
fseek(hFile->fh, 0, SEEK_END);
size = ftell(hFile->fh);
//restore
fseek(hFile->fh, current, 0);
if ( lpFileSizeHigh )
{
*lpFileSizeHigh = size;
}
return size;
}
return -1;
}
int NixStat(const char* filen, struct stat *b)