346 lines
7.1 KiB
C
346 lines
7.1 KiB
C
/*
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sys_linux.c
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Linux-style Unix system driver.
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1999,2000 contributors of the QuakeForge project
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Please see the file "AUTHORS" for a list of contributors
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA.
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*/
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#include <unistd.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <ctype.h>
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#include <sys/wait.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include "quakedef.h"
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#ifndef QUAKEWORLD
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qboolean isDedicated;
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#endif
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extern int nostdout;
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int noconinput = 0;
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char *basedir = ".";
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char *cachedir = "/tmp";
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cvar_t sys_linerefresh = {"sys_linerefresh","0"};// set for entity display
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// =======================================================================
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// General routines
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// =======================================================================
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void Sys_DebugNumber(int y, int val) {
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}
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void Sys_Quit (void) {
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Host_Shutdown();
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fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~O_NDELAY);
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exit(0);
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}
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void Sys_Init(void) {
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#if id386
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Sys_SetFPCW();
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#endif
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}
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void Sys_Error (char *error, ...) {
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va_list argptr;
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char string[1024];
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// change stdin to non blocking
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fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~O_NDELAY);
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va_start (argptr,error);
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vsprintf (string,error,argptr);
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va_end (argptr);
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fprintf(stderr, "Error: %s\n", string);
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Host_Shutdown ();
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exit (1);
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}
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void Sys_Warn (char *warning, ...) {
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va_list argptr;
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char string[1024];
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va_start (argptr,warning);
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vsprintf (string,warning,argptr);
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va_end (argptr);
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fprintf(stderr, "Warning: %s", string);
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}
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int Sys_FileOpenRead (char *path, int *handle) {
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int h;
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struct stat fileinfo;
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h = open (path, O_RDONLY, 0666);
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*handle = h;
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if (h == -1)
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return -1;
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if (fstat (h,&fileinfo) == -1)
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Sys_Error ("Error fstating %s", path);
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return fileinfo.st_size;
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}
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int Sys_FileOpenWrite (char *path) {
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int handle;
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umask (0);
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handle = open(path,O_RDWR | O_CREAT | O_TRUNC, 0666);
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if (handle == -1)
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Sys_Error ("Error opening %s: %s", path,strerror(errno));
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return handle;
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}
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int Sys_FileWrite (int handle, void *src, int count) {
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return write (handle, src, count);
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}
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void Sys_FileClose (int handle) {
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close (handle);
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}
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void Sys_FileSeek (int handle, int position) {
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lseek (handle, position, SEEK_SET);
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}
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int Sys_FileRead (int handle, void *dest, int count) {
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return read (handle, dest, count);
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}
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void Sys_DebugLog(char *file, char *fmt, ...) {
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va_list argptr;
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static char data[1024];
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int fd;
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va_start(argptr, fmt);
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vsprintf(data, fmt, argptr);
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va_end(argptr);
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// fd = open(file, O_WRONLY | O_BINARY | O_CREAT | O_APPEND, 0666);
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fd = open(file, O_WRONLY | O_CREAT | O_APPEND, 0666);
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write(fd, data, strlen(data));
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close(fd);
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}
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void Sys_EditFile(char *filename) {
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char cmd[256];
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char *term;
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char *editor;
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term = getenv("TERM");
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if (term && !strcmp(term, "xterm"))
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{
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editor = getenv("VISUAL");
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if (!editor)
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editor = getenv("EDITOR");
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if (!editor)
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editor = getenv("EDIT");
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if (!editor)
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editor = "vi";
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snprintf(cmd, sizeof(cmd), "xterm -e %s %s", editor, filename);
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system(cmd);
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}
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}
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// =======================================================================
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// Sleeps for microseconds
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// =======================================================================
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static volatile int oktogo;
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void alarm_handler(int x) {
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oktogo=1;
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}
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void Sys_LineRefresh(void) {
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}
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void floating_point_exception_handler(int whatever) {
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// Sys_Warn("floating point exception\n");
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signal(SIGFPE, floating_point_exception_handler);
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}
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char *Sys_ConsoleInput(void) {
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#ifndef QUAKEWORLD
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static char text[256];
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fd_set fdset;
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int len;
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struct timeval timeout;
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if (cls.state == ca_dedicated) {
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FD_ZERO(&fdset);
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FD_SET(0, &fdset); // stdin
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timeout.tv_sec = 0;
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timeout.tv_usec = 0;
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if (select (1, &fdset, NULL, NULL, &timeout) == -1 || !FD_ISSET(0, &fdset))
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return NULL;
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len = read (0, text, sizeof(text));
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if (len < 1)
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return NULL;
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text[len-1] = 0; // rip off the \n and terminate
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return text;
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}
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#endif
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return NULL;
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}
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#if !id386
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void Sys_HighFPPrecision (void) {
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}
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void Sys_LowFPPrecision (void) {
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}
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#endif
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#ifdef QUAKEWORLD
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int skipframes;
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#endif
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int main (int c, char **v) {
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double time, oldtime, newtime;
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quakeparms_t parms;
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int j;
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#ifndef QUAKEWORLD
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extern int vcrFile;
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extern int recording;
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#endif
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signal(SIGFPE, SIG_IGN);
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memset(&parms, 0, sizeof(parms));
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COM_InitArgv(c, v);
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parms.argc = com_argc;
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parms.argv = com_argv;
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#ifdef GLQUAKE
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parms.memsize = 16*1024*1024;
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#else
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parms.memsize = 8*1024*1024;
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#endif
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j = COM_CheckParm("-mem");
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if (j)
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parms.memsize = (int) (Q_atof(com_argv[j+1]) * 1024 * 1024);
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parms.membase = malloc (parms.memsize);
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parms.basedir = basedir;
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// caching is disabled by default, use -cachedir to enable
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// parms.cachedir = cachedir;
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noconinput = COM_CheckParm("-noconinput");
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if (!noconinput)
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fcntl(0, F_SETFL, fcntl (0, F_GETFL, 0) | O_NDELAY);
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if (COM_CheckParm("-nostdout")) {
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nostdout = 1;
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} else {
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fcntl(0, F_SETFL, fcntl (0, F_GETFL, 0) | O_NDELAY);
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#ifdef QUAKEWORLD
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printf ("QuakeForge (QW Client) v%s\n", VERSION);
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#else
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printf ("QuakeForge (UQuake) v%s\n", VERSION);
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#endif
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}
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Sys_Init();
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Host_Init(&parms);
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oldtime = Sys_DoubleTime ();
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while (1) {
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// find time spent rendering last frame
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newtime = Sys_DoubleTime ();
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time = newtime - oldtime;
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#ifndef QUAKEWORLD
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if (cls.state == ca_dedicated) { // play vcrfiles at max speed
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if (time < sys_ticrate.value && (vcrFile == -1 || recording) ) {
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usleep(1);
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continue; // not time to run a server only tic yet
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}
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time = sys_ticrate.value;
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}
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if (time > sys_ticrate.value*2)
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oldtime = newtime;
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else
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oldtime += time;
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#else
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oldtime = newtime;
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#endif
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Host_Frame(time);
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// graphic debugging aids
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if (sys_linerefresh.value)
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Sys_LineRefresh ();
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}
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}
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/*
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Sys_MakeCodeWriteable
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*/
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void Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length) {
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int r;
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unsigned long addr;
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int psize = getpagesize();
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addr = (startaddr & ~(psize-1)) - psize;
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// fprintf(stderr, "writable code %lx(%lx)-%lx, length=%lx\n", startaddr,
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// addr, startaddr+length, length);
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r = mprotect((char*)addr, length + startaddr - addr + psize, 7);
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if (r < 0)
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Sys_Error("Protection change failed\n");
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}
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