ref: c05151aa1b7ac81866cf937c973e7038035dfe53
dir: /plan9/sys_linux.c/
#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 <mntent.h>
#include <dlfcn.h>
#include "../qcommon/qcommon.h"
#include "../linux/rw_linux.h"
cvar_t *nostdout;
unsigned sys_frame_time;
uid_t saved_euid;
qboolean stdin_active = true;
// =======================================================================
// General routines
// =======================================================================
void Sys_ConsoleOutput (char *string)
{
if (nostdout && nostdout->value)
return;
fputs(string, stdout);
}
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");
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);
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);
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;
#ifdef __i386__
const char *gamename = "gamei386.so";
#elif defined __alpha__
const char *gamename = "gameaxp.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 -------", 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_NOW );
if (game_library)
{
Com_DPrintf ("LoadLibrary (%s)\n",name);
break;
}
else
printf("dlerror: %s\n", dlerror());
}
GetGameAPI = (void *)dlsym (game_library, "GetGameAPI");
if (!GetGameAPI)
{
Sys_UnloadGame ();
return NULL;
}
return GetGameAPI (parms);
}
/*****************************************************************************/
void Sys_AppActivate (void)
{
}
void Sys_SendKeyEvents (void)
{
#ifndef DEDICATED_ONLY
if (KBD_Update_fp)
KBD_Update_fp();
#endif
// grab frame time
sys_frame_time = Sys_Milliseconds();
}
/*****************************************************************************/
char *Sys_GetClipboardData(void)
{
return NULL;
}
int main (int argc, char **argv)
{
int time, oldtime, newtime;
// go back to real user for config loads
saved_euid = geteuid();
seteuid(getuid());
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 -- Version %0.3f\n", LINUX_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;
}
}
void Sys_CopyProtect(void)
{
FILE *mnt;
struct mntent *ent;
char path[MAX_OSPATH];
struct stat st;
qboolean found_cd = false;
static qboolean checked = false;
if (checked)
return;
if ((mnt = setmntent("/etc/mtab", "r")) == NULL)
Com_Error(ERR_FATAL, "Can't read mount table to determine mounted cd location.");
while ((ent = getmntent(mnt)) != NULL) {
if (strcmp(ent->mnt_type, "iso9660") == 0) {
// found a cd file system
found_cd = true;
sprintf(path, "%s/%s", ent->mnt_dir, "install/data/quake2.exe");
if (stat(path, &st) == 0) {
// found it
checked = true;
endmntent(mnt);
return;
}
sprintf(path, "%s/%s", ent->mnt_dir, "Install/Data/quake2.exe");
if (stat(path, &st) == 0) {
// found it
checked = true;
endmntent(mnt);
return;
}
sprintf(path, "%s/%s", ent->mnt_dir, "quake2.exe");
if (stat(path, &st) == 0) {
// found it
checked = true;
endmntent(mnt);
return;
}
}
}
endmntent(mnt);
if (found_cd)
Com_Error (ERR_FATAL, "Could not find a Quake2 CD in your CD drive.");
Com_Error (ERR_FATAL, "Unable to find a mounted iso9660 file system.\n"
"You must mount the Quake2 CD in a cdrom drive in order to play.");
}
#if 0
/*
================
Sys_MakeCodeWriteable
================
*/
void Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length)
{
int r;
unsigned long addr;
int psize = getpagesize();
addr = (startaddr & ~(psize-1)) - psize;
// fprintf(stderr, "writable code %lx(%lx)-%lx, length=%lx\n", startaddr,
// addr, startaddr+length, length);
r = mprotect((char*)addr, length + startaddr - addr + psize, 7);
if (r < 0)
Sys_Error("Protection change failed\n");
}
#endif