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unix_main.c
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unix_main.c
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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
Quake III Arena 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include <unistd.h>
#include <signal.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <string.h>
#include <ctype.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <errno.h>
#include <libgen.h> // dirname
#ifdef __linux__ // rb010123
#include <mntent.h>
#endif
#if (defined(DEDICATED) && defined(USE_SDL_VIDEO))
#undef USE_SDL_VIDEO
#endif
#if USE_SDL_VIDEO
#include "SDL.h"
#include "SDL_loadso.h"
#else
#include <dlfcn.h>
#endif
#ifdef __linux__
#include <fpu_control.h> // bk001213 - force dumps on divide by zero
#endif
#if defined(__sun)
#include <sys/file.h>
#endif
// FIXME TTimo should we gard this? most *nix system should comply?
#include <termios.h>
#include "../qcommon/q_shared.h"
#include "../qcommon/qcommon.h"
#include "../renderer/tr_public.h"
#include "linux_local.h" // bk001204
#if idppc_altivec
#ifdef MACOS_X
#include <Carbon/Carbon.h>
#endif
#endif
unsigned sys_frame_time;
qboolean stdin_active = qtrue;
// =============================================================
// tty console variables
// =============================================================
// enable/disabled tty input mode
// NOTE TTimo this is used during startup, cannot be changed during run
static cvar_t *ttycon = NULL;
// general flag to tell about tty console mode
static qboolean ttycon_on = qfalse;
// when printing general stuff to stdout stderr (Sys_Printf)
// we need to disable the tty console stuff
// this increments so we can recursively disable
static int ttycon_hide = 0;
// some key codes that the terminal may be using
// TTimo NOTE: I'm not sure how relevant this is
static int tty_erase;
static int tty_eof;
static struct termios tty_tc;
static field_t tty_con;
static cvar_t *ttycon_ansicolor = NULL;
static qboolean ttycon_color_on = qfalse;
// history
// NOTE TTimo this is a bit duplicate of the graphical console history
// but it's safer and faster to write our own here
#define TTY_HISTORY 32
static field_t ttyEditLines[TTY_HISTORY];
static int hist_current = -1, hist_count = 0;
// =======================================================================
// General routines
// =======================================================================
// bk001207
#define MEM_THRESHOLD 96*1024*1024
/*
==================
Sys_LowPhysicalMemory()
==================
*/
qboolean Sys_LowPhysicalMemory() {
//MEMORYSTATUS stat;
//GlobalMemoryStatus (&stat);
//return (stat.dwTotalPhys <= MEM_THRESHOLD) ? qtrue : qfalse;
return qfalse; // bk001207 - FIXME
}
/*
==================
Sys_FunctionCmp
==================
*/
int Sys_FunctionCmp(void *f1, void *f2) {
return qtrue;
}
/*
==================
Sys_FunctionCheckSum
==================
*/
int Sys_FunctionCheckSum(void *f1) {
return 0;
}
/*
==================
Sys_MonkeyShouldBeSpanked
==================
*/
int Sys_MonkeyShouldBeSpanked( void ) {
return 0;
}
void Sys_BeginProfiling( void ) {
}
/*
=================
Sys_In_Restart_f
Restart the input subsystem
=================
*/
void Sys_In_Restart_f( void )
{
IN_Shutdown();
IN_Init();
}
// =============================================================
// tty console routines
// NOTE: if the user is editing a line when something gets printed to the early console then it won't look good
// so we provide tty_Clear and tty_Show to be called before and after a stdout or stderr output
// =============================================================
// flush stdin, I suspect some terminals are sending a LOT of shit
// FIXME TTimo relevant?
void tty_FlushIn( void )
{
char key;
while (read(0, &key, 1)!=-1);
}
// do a backspace
// TTimo NOTE: it seems on some terminals just sending '\b' is not enough
// so for now, in any case we send "\b \b" .. yeah well ..
// (there may be a way to find out if '\b' alone would work though)
void tty_Back( void )
{
char key;
key = '\b';
write(1, &key, 1);
key = ' ';
write(1, &key, 1);
key = '\b';
write(1, &key, 1);
}
// clear the display of the line currently edited
// bring cursor back to beginning of line
void tty_Hide( void )
{
int i;
assert(ttycon_on);
if (ttycon_hide)
{
ttycon_hide++;
return;
}
if (tty_con.cursor>0)
{
for (i=0; i<tty_con.cursor; i++)
{
tty_Back();
}
}
ttycon_hide++;
}
// show the current line
// FIXME TTimo need to position the cursor if needed??
void tty_Show( void )
{
int i;
assert(ttycon_on);
assert(ttycon_hide>0);
ttycon_hide--;
if (ttycon_hide == 0)
{
if (tty_con.cursor)
{
for (i=0; i<tty_con.cursor; i++)
{
write(1, tty_con.buffer+i, 1);
}
}
}
}
// never exit without calling this, or your terminal will be left in a pretty bad state
void Sys_ConsoleInputShutdown( void )
{
if (ttycon_on)
{
Com_Printf("Shutdown tty console\n");
tcsetattr (0, TCSADRAIN, &tty_tc);
}
}
void Hist_Add(field_t *field)
{
int i;
assert(hist_count <= TTY_HISTORY);
assert(hist_count >= 0);
assert(hist_current >= -1);
assert(hist_current <= hist_count);
// make some room
for (i=TTY_HISTORY-1; i>0; i--)
{
ttyEditLines[i] = ttyEditLines[i-1];
}
ttyEditLines[0] = *field;
if (hist_count<TTY_HISTORY)
{
hist_count++;
}
hist_current = -1; // re-init
}
field_t *Hist_Prev( void )
{
int hist_prev;
assert(hist_count <= TTY_HISTORY);
assert(hist_count >= 0);
assert(hist_current >= -1);
assert(hist_current <= hist_count);
hist_prev = hist_current + 1;
if (hist_prev >= hist_count)
{
return NULL;
}
hist_current++;
return &(ttyEditLines[hist_current]);
}
field_t *Hist_Next( void )
{
assert(hist_count <= TTY_HISTORY);
assert(hist_count >= 0);
assert(hist_current >= -1);
assert(hist_current <= hist_count);
if (hist_current >= 0)
{
hist_current--;
}
if (hist_current == -1)
{
return NULL;
}
return &(ttyEditLines[hist_current]);
}
// =============================================================
// general sys routines
// =============================================================
#if 0
// NOTE TTimo this is not used .. looks interesting though? protection against buffer overflow kind of stuff?
void Sys_Printf (char *fmt, ...)
{
va_list argptr;
char text[1024];
unsigned char *p;
va_start (argptr,fmt);
vsprintf (text,fmt,argptr);
va_end (argptr);
if (strlen(text) > sizeof(text))
Sys_Error("memory overwrite in Sys_Printf");
for (p = (unsigned char *)text; *p; p++)
{
*p &= 0x7f;
if ((*p > 128 || *p < 32) && *p != 10 && *p != 13 && *p != 9)
printf("[%02x]", *p);
else
putc(*p, stdout);
}
}
#endif
// single exit point (regular exit or in case of signal fault)
void Sys_Exit( int ex ) {
Sys_ConsoleInputShutdown();
#ifdef NDEBUG // regular behavior
// We can't do this
// as long as GL DLL's keep installing with atexit...
//exit(ex);
_exit(ex);
#else
// Give me a backtrace on error exits.
assert( ex == 0 );
exit(ex);
#endif
}
void Sys_Quit (void) {
CL_Shutdown ();
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);
Sys_Exit(0);
}
#if idppc_altivec && !MACOS_X
/* This is the brute force way of detecting instruction sets...
the code is borrowed from SDL, which got the idea from the libmpeg2
library - thanks!
*/
#include <signal.h>
#include <setjmp.h>
static jmp_buf jmpbuf;
static void illegal_instruction(int sig)
{
longjmp(jmpbuf, 1);
}
#endif
static void Sys_DetectAltivec(void)
{
// Only detect if user hasn't forcibly disabled it.
qboolean altivec = qfalse;
if (com_altivec->integer) {
#if idppc_altivec
#ifdef MACOS_X
long feat = 0;
OSErr err = Gestalt(gestaltPowerPCProcessorFeatures, &feat);
if ((err==noErr) && ((1 << gestaltPowerPCHasVectorInstructions) & feat)) {
altivec = qtrue;
}
#else
void (*handler)(int sig);
handler = signal(SIGILL, illegal_instruction);
if ( setjmp(jmpbuf) == 0 ) {
asm volatile ("mtspr 256, %0\n\t"
"vand %%v0, %%v0, %%v0"
:
: "r" (-1));
altivec = qtrue;
}
signal(SIGILL, handler);
#endif
if (!altivec) {
Cvar_Set( "com_altivec", "0" ); // we don't have it! Disable support!
}
#endif
}
}
void Sys_Init(void)
{
Sys_DetectAltivec();
Cmd_AddCommand ("in_restart", Sys_In_Restart_f);
Cvar_Set( "arch", OS_STRING " " ARCH_STRING );
Cvar_Set( "username", Sys_GetCurrentUser() );
//IN_Init(); // rcg08312005 moved into glimp.
}
void Sys_Error( const char *error, ...)
{
va_list argptr;
char string[1024];
// change stdin to non blocking
// NOTE TTimo not sure how well that goes with tty console mode
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);
// don't bother do a show on this one heh
if (ttycon_on)
{
tty_Hide();
}
CL_Shutdown ();
va_start (argptr,error);
vsprintf (string,error,argptr);
va_end (argptr);
fprintf(stderr, "Sys_Error: %s\n", string);
Sys_Exit( 1 ); // bk010104 - use single exit point.
}
void Sys_Warn (char *warning, ...)
{
va_list argptr;
char string[1024];
va_start (argptr,warning);
vsprintf (string,warning,argptr);
va_end (argptr);
if (ttycon_on)
{
tty_Hide();
}
fprintf(stderr, "Warning: %s", string);
if (ttycon_on)
{
tty_Show();
}
}
/*
============
Sys_FileTime
returns -1 if not present
============
*/
int Sys_FileTime (char *path)
{
struct stat buf;
if (stat (path,&buf) == -1)
return -1;
return buf.st_mtime;
}
void floating_point_exception_handler(int whatever)
{
signal(SIGFPE, floating_point_exception_handler);
}
// initialize the console input (tty mode if wanted and possible)
void Sys_ConsoleInputInit( void )
{
struct termios tc;
// TTimo
// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=390
// ttycon 0 or 1, if the process is backgrounded (running non interactively)
// then SIGTTIN or SIGTOU is emitted, if not catched, turns into a SIGSTP
signal(SIGTTIN, SIG_IGN);
signal(SIGTTOU, SIG_IGN);
// FIXME TTimo initialize this in Sys_Init or something?
ttycon = Cvar_Get("ttycon", "1", 0);
if (ttycon && ttycon->value)
{
if (isatty(STDIN_FILENO)!=1)
{
Com_Printf("stdin is not a tty, tty console mode failed\n");
Cvar_Set("ttycon", "0");
ttycon_on = qfalse;
return;
}
Com_Printf("Started tty console (use +set ttycon 0 to disable)\n");
Field_Clear(&tty_con);
tcgetattr (0, &tty_tc);
tty_erase = tty_tc.c_cc[VERASE];
tty_eof = tty_tc.c_cc[VEOF];
tc = tty_tc;
/*
ECHO: don't echo input characters
ICANON: enable canonical mode. This enables the special
characters EOF, EOL, EOL2, ERASE, KILL, REPRINT,
STATUS, and WERASE, and buffers by lines.
ISIG: when any of the characters INTR, QUIT, SUSP, or
DSUSP are received, generate the corresponding sig
nal
*/
tc.c_lflag &= ~(ECHO | ICANON);
/*
ISTRIP strip off bit 8
INPCK enable input parity checking
*/
tc.c_iflag &= ~(ISTRIP | INPCK);
tc.c_cc[VMIN] = 1;
tc.c_cc[VTIME] = 0;
tcsetattr (0, TCSADRAIN, &tc);
ttycon_on = qtrue;
ttycon_ansicolor = Cvar_Get( "ttycon_ansicolor", "0", CVAR_ARCHIVE );
if( ttycon_ansicolor && ttycon_ansicolor->value )
{
ttycon_color_on = qtrue;
}
} else
ttycon_on = qfalse;
}
char *Sys_ConsoleInput(void)
{
// we use this when sending back commands
static char text[256];
int i;
int avail;
char key;
field_t *history;
if (ttycon && ttycon->value)
{
avail = read(0, &key, 1);
if (avail != -1)
{
// we have something
// backspace?
// NOTE TTimo testing a lot of values .. seems it's the only way to get it to work everywhere
if ((key == tty_erase) || (key == 127) || (key == 8))
{
if (tty_con.cursor > 0)
{
tty_con.cursor--;
tty_con.buffer[tty_con.cursor] = '\0';
tty_Back();
}
return NULL;
}
// check if this is a control char
if ((key) && (key) < ' ')
{
if (key == '\n')
{
// push it in history
Hist_Add(&tty_con);
strcpy(text, tty_con.buffer);
Field_Clear(&tty_con);
key = '\n';
write(1, &key, 1);
return text;
}
if (key == '\t')
{
tty_Hide();
Field_CompleteCommand( &tty_con );
// Field_CompleteCommand does weird things to the string, do a cleanup
// it adds a '\' at the beginning of the string
// cursor doesn't reflect actual length of the string that's sent back
tty_con.cursor = strlen(tty_con.buffer);
if (tty_con.cursor>0)
{
if (tty_con.buffer[0] == '\\')
{
for (i=0; i<=tty_con.cursor; i++)
{
tty_con.buffer[i] = tty_con.buffer[i+1];
}
tty_con.cursor--;
}
}
tty_Show();
return NULL;
}
avail = read(0, &key, 1);
if (avail != -1)
{
// VT 100 keys
if (key == '[' || key == 'O')
{
avail = read(0, &key, 1);
if (avail != -1)
{
switch (key)
{
case 'A':
history = Hist_Prev();
if (history)
{
tty_Hide();
tty_con = *history;
tty_Show();
}
tty_FlushIn();
return NULL;
break;
case 'B':
history = Hist_Next();
tty_Hide();
if (history)
{
tty_con = *history;
} else
{
Field_Clear(&tty_con);
}
tty_Show();
tty_FlushIn();
return NULL;
break;
case 'C':
return NULL;
case 'D':
return NULL;
}
}
}
}
Com_DPrintf("droping ISCTL sequence: %d, tty_erase: %d\n", key, tty_erase);
tty_FlushIn();
return NULL;
}
// push regular character
tty_con.buffer[tty_con.cursor] = key;
tty_con.cursor++;
// print the current line (this is differential)
write(1, &key, 1);
}
return NULL;
} else
{
int len;
fd_set fdset;
struct timeval timeout;
if (!com_dedicated || !com_dedicated->value)
return NULL;
if (!stdin_active)
return NULL;
FD_ZERO(&fdset);
FD_SET(0, &fdset); // stdin
timeout.tv_sec = 0;
timeout.tv_usec = 0;
if (select (1, &fdset, NULL, NULL, &timeout) == -1 || !FD_ISSET(0, &fdset))
{
return NULL;
}
len = read (0, text, sizeof(text));
if (len == 0)
{ // eof!
stdin_active = qfalse;
return NULL;
}
if (len < 1)
return NULL;
text[len-1] = 0; // rip off the /n and terminate
return text;
}
}
/*****************************************************************************/
char *do_dlerror(void)
{
#if USE_SDL_VIDEO
return SDL_GetError();
#else
return dlerror();
#endif
}
/*
=================
Sys_UnloadDll
=================
*/
void Sys_UnloadDll( void *dllHandle ) {
// bk001206 - verbose error reporting
if ( !dllHandle )
{
Com_Printf("Sys_UnloadDll(NULL)\n");
return;
}
#if USE_SDL_VIDEO
SDL_UnloadObject(dllHandle);
#else
dlclose( dllHandle );
{
const char* err; // rb010123 - now const
err = dlerror();
if ( err != NULL )
Com_Printf ( "Sys_UnloadGame failed on dlclose: \"%s\"!\n", err );
}
#endif
}
/*
=================
Sys_LoadDll
Used to load a development dll instead of a virtual machine
TTimo:
changed the load procedure to match VFS logic, and allow developer use
#1 look down current path
#2 look in fs_homepath
#3 look in fs_basepath
=================
*/
static void* try_dlopen(const char* base, const char* gamedir, const char* fname, char* fqpath )
{
void* libHandle;
char* fn;
*fqpath = 0;
// bk001129 - was RTLD_LAZY
#define Q_RTLD RTLD_NOW
fn = FS_BuildOSPath( base, gamedir, fname );
Com_Printf( "Sys_LoadDll(%s)... \n", fn );
#if USE_SDL_VIDEO
libHandle = SDL_LoadObject(fn);
#else
libHandle = dlopen( fn, Q_RTLD );
#endif
if(!libHandle) {
Com_Printf( "Sys_LoadDll(%s) failed:\n\"%s\"\n", fn, do_dlerror() );
return NULL;
}
Com_Printf ( "Sys_LoadDll(%s): succeeded ...\n", fn );
Q_strncpyz ( fqpath , fn , MAX_QPATH ) ; // added 7/20/02 by T.Ray
return libHandle;
}
void *Sys_LoadDll( const char *name, char *fqpath ,
long (**entryPoint)(long, ...),
long (*systemcalls)(long, ...) )
{
void *libHandle;
void (*dllEntry)( long (*syscallptr)(long, ...) );
char curpath[MAX_OSPATH];
char fname[MAX_OSPATH];
char *basepath;
char *homepath;
char *pwdpath;
char *cdpath;
char *gamedir;
const char* err = NULL;
// bk001206 - let's have some paranoia
assert( name );
getcwd(curpath, sizeof(curpath));
snprintf (fname, sizeof(fname), "%s" ARCH_STRING ".so", name);
// TODO: use fs_searchpaths from files.c
pwdpath = Sys_Cwd();
basepath = Cvar_VariableString( "fs_basepath" );
homepath = Cvar_VariableString( "fs_homepath" );
cdpath = Cvar_VariableString( "fs_cdpath" );
gamedir = Cvar_VariableString( "fs_game" );
libHandle = try_dlopen(pwdpath, gamedir, fname, fqpath);
if(!libHandle && homepath)
libHandle = try_dlopen(homepath, gamedir, fname, fqpath);
if(!libHandle && basepath)
libHandle = try_dlopen(basepath, gamedir, fname, fqpath);
if(!libHandle && cdpath)
libHandle = try_dlopen(cdpath, gamedir, fname, fqpath);
if(!libHandle) {
#if 0 // don't abort -- ln
//#ifndef NDEBUG // bk001206 - in debug abort on failure
Com_Error ( ERR_FATAL, "Sys_LoadDll(%s) failed dlopen() completely!\n", name );
#else
Com_Printf ( "Sys_LoadDll(%s) failed dlopen() completely!\n", name );
#endif
return NULL;
}
#if USE_SDL_VIDEO
dllEntry = SDL_LoadFunction( libHandle, "dllEntry" );
*entryPoint = SDL_LoadFunction( libHandle, "vmMain" );
#else
dllEntry = dlsym( libHandle, "dllEntry" );
*entryPoint = dlsym( libHandle, "vmMain" );
#endif
if ( !*entryPoint || !dllEntry )
{
err = do_dlerror();
#ifndef NDEBUG // bk001206 - in debug abort on failure
Com_Error ( ERR_FATAL, "Sys_LoadDll(%s) failed dlsym(vmMain):\n\"%s\" !\n", name, err );
#else
Com_Printf ( "Sys_LoadDll(%s) failed dlsym(vmMain):\n\"%s\" !\n", name, err );
#endif
#if USE_SDL_VIDEO
SDL_UnloadObject(libHandle);
#else
dlclose( libHandle );
err = do_dlerror();
if ( err != NULL ) {
Com_Printf ( "Sys_LoadDll(%s) failed dlcose:\n\"%s\"\n", name, err );
}
#endif
return NULL;
}
Com_Printf ( "Sys_LoadDll(%s) found **vmMain** at %p \n", name, *entryPoint ); // bk001212
dllEntry( systemcalls );
Com_Printf ( "Sys_LoadDll(%s) succeeded!\n", name );
return libHandle;
}
/*
========================================================================
BACKGROUND FILE STREAMING
========================================================================
*/
#if 1
void Sys_InitStreamThread( void ) {
}
void Sys_ShutdownStreamThread( void ) {
}
void Sys_BeginStreamedFile( fileHandle_t f, int readAhead ) {
}
void Sys_EndStreamedFile( fileHandle_t f ) {
}
int Sys_StreamedRead( void *buffer, int size, int count, fileHandle_t f ) {
return FS_Read( buffer, size * count, f );
}
void Sys_StreamSeek( fileHandle_t f, int offset, int origin ) {
FS_Seek( f, offset, origin );
}
#else
typedef struct
{
fileHandle_t file;
byte *buffer;
qboolean eof;
int bufferSize;
int streamPosition; // next byte to be returned by Sys_StreamRead
int threadPosition; // next byte to be read from file
} streamState_t;
streamState_t stream;
/*
===============
Sys_StreamThread
A thread will be sitting in this loop forever
================
*/
void Sys_StreamThread( void )
{
int buffer;
int count;
int readCount;
int bufferPoint;
int r;
// if there is any space left in the buffer, fill it up
if ( !stream.eof )
{
count = stream.bufferSize - (stream.threadPosition - stream.streamPosition);
if ( count )
{
bufferPoint = stream.threadPosition % stream.bufferSize;
buffer = stream.bufferSize - bufferPoint;
readCount = buffer < count ? buffer : count;
r = FS_Read ( stream.buffer + bufferPoint, readCount, stream.file );
stream.threadPosition += r;
if ( r != readCount )
stream.eof = qtrue;
}
}
}
/*
===============
Sys_InitStreamThread
================
*/
void Sys_InitStreamThread( void )
{
}
/*
===============
Sys_ShutdownStreamThread
================
*/
void Sys_ShutdownStreamThread( void )
{
}
/*
===============
Sys_BeginStreamedFile
================
*/
void Sys_BeginStreamedFile( fileHandle_t f, int readAhead )
{
if ( stream.file )
{
Com_Error( ERR_FATAL, "Sys_BeginStreamedFile: unclosed stream");
}
stream.file = f;
stream.buffer = Z_Malloc( readAhead );
stream.bufferSize = readAhead;
stream.streamPosition = 0;
stream.threadPosition = 0;
stream.eof = qfalse;
}
/*
===============
Sys_EndStreamedFile
================
*/
void Sys_EndStreamedFile( fileHandle_t f )
{
if ( f != stream.file )
{