thirtyflightsofloving/unix/sys_unix.c
2019-03-13 15:20:07 -04:00

346 lines
6.9 KiB
C

/*
Copyright (C) 1997-2001 Id Software, Inc.
This program 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.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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>
#ifdef __linux__
#include <mntent.h>
#endif
#include <dlfcn.h>
#include "../qcommon/qcommon.h"
cvar_t *nostdout;
unsigned sys_frame_time;
uid_t saved_euid;
qboolean stdin_active = true;
int ActiveApp;
// =======================================================================
// General routines
// =======================================================================
void Sys_ConsoleOutput (char *string)
{
if (nostdout && nostdout->value)
return;
fputs(string, stdout);
}
void Sys_Sleep (int msec)
{
if (msec < 0) return;
usleep ((unsigned int)msec * 1000);
}
unsigned Sys_TickCount (void)
{
return clock();
}
void Sys_Printf (char *fmt, ...)
{
va_list argptr;
char text[1024];
unsigned char *p;
va_start (argptr, fmt);
// vsprintf (text, fmt, argptr);
Q_vsnprintf (text, sizeof(text), fmt, argptr);
va_end (argptr);
if (strlen(text) > sizeof(text))
Sys_Error("memory overwrite in Sys_Printf");
if (nostdout && nostdout->value)
return;
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);
}
}
void Sys_Quit (void)
{
CL_Shutdown ();
Qcommon_Shutdown ();
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);
_exit(0);
}
void Sys_Init(void)
{
#if id386
// Sys_SetFPCW();
#endif
}
void Sys_Error (char *error, ...)
{
va_list argptr;
char string[1024];
// change stdin to non blocking
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);
CL_Shutdown ();
Qcommon_Shutdown ();
va_start (argptr, error);
// vsprintf (string, error, argptr);
Q_vsnprintf (string, sizeof(string), error, argptr);
va_end (argptr);
fprintf(stderr, "Error: %s\n", string);
_exit (1);
}
void Sys_Warn (char *warning, ...)
{
va_list argptr;
char string[1024];
va_start (argptr, warning);
// vsprintf (string, warning, argptr);
Q_vsnprintf (string, sizeof(string), warning, argptr);
va_end (argptr);
fprintf(stderr, "Warning: %s", string);
}
/*
============
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)
{
// Sys_Warn("floating point exception\n");
signal(SIGFPE, floating_point_exception_handler);
}
char *Sys_ConsoleInput(void)
{
static char text[256];
int len;
fd_set fdset;
struct timeval timeout;
if (!dedicated || !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 = false;
return NULL;
}
if (len < 1)
return NULL;
text[len-1] = 0; // rip off the /n and terminate
return text;
}
/*****************************************************************************/
static void *game_library;
/*
=================
Sys_UnloadGame
=================
*/
void Sys_UnloadGame (void)
{
if (game_library)
dlclose (game_library);
game_library = NULL;
}
/*
=================
Sys_GetGameAPI
Loads the game dll
=================
*/
void *Sys_GetGameAPI (void *parms)
{
void *(*GetGameAPI) (void *);
char name[MAX_OSPATH];
char curpath[MAX_OSPATH];
char *path;
// Knightmare- changed game library name for better cohabitation
#ifdef __i386__
const char *gamename = "kmq2gamei386.so";
#elif defined __alpha__
const char *gamename = "kmq2gameaxp.so";
#elif defined __x86_64__
const char *gamename = "kmq2gamex86_64.so";
#elif defined __powerpc__
const char *gamename = "kmq2gameppc.so";
#elif defined __sparc__
const char *gamename = "kmq2gamesparc.so";
#else
#error Unknown arch
#endif
setreuid(getuid(), getuid());
setegid(getgid());
if (game_library)
Com_Error (ERR_FATAL, "Sys_GetGameAPI without Sys_UnloadingGame");
getcwd(curpath, sizeof(curpath));
Com_Printf("------- Loading %s -------\n", gamename);
// now run through the search paths
path = NULL;
while (1)
{
path = FS_NextPath (path);
if (!path)
return NULL; // couldn't find one anywhere
sprintf (name, "%s/%s/%s", curpath, path, gamename);
game_library = dlopen (name, RTLD_LAZY );
if (game_library)
{
Com_Printf ("LoadLibrary (%s)\n",name);
break;
}
}
GetGameAPI = (void *)dlsym (game_library, "GetGameAPI");
if (!GetGameAPI)
{
Sys_UnloadGame ();
return NULL;
}
return GetGameAPI (parms);
}
/*****************************************************************************/
void Sys_AppActivate (void)
{
}
void HandleEvents(void);
void Sys_SendKeyEvents (void)
{
#ifndef DEDICATED_ONLY
HandleEvents();
#endif
// grab frame time
sys_frame_time = Sys_Milliseconds();
}
/*****************************************************************************/
int main (int argc, char **argv)
{
int time, oldtime, newtime;
// go back to real user for config loads
saved_euid = geteuid();
seteuid(getuid());
printf ("\n");
printf ("========= Initialization =================\n");
printf ("KMQuake2 -- Version 0.20\n");
printf ("Linux Port by QuDos\n");
printf ("http://qudos.quakedev.com/\n");
printf ("Compiled: "__DATE__" -- "__TIME__"\n");
printf ("==========================================\n\n");
Qcommon_Init(argc, argv);
fcntl(0, F_SETFL, fcntl (0, F_GETFL, 0) | FNDELAY);
nostdout = Cvar_Get("nostdout", "0", 0);
if (!nostdout->value) {
fcntl(0, F_SETFL, fcntl (0, F_GETFL, 0) | FNDELAY);
// printf ("Linux Quake II -- Version %0.3f\n", KMQUAKE2_VERSION);
}
oldtime = Sys_Milliseconds ();
while (1)
{
// find time spent rendering last frame
do {
newtime = Sys_Milliseconds ();
time = newtime - oldtime;
} while (time < 1);
Qcommon_Frame (time);
oldtime = newtime;
}
}