Xash3D FWGS engine.
 
 
 
 

171 lines
3.7 KiB

/*
sys_win.c - posix system utils
Copyright (C) 2019 a1batross
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 3 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.
*/
#include <unistd.h> // fork
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "platform/platform.h"
#include "menu_int.h"
static qboolean Sys_FindExecutable( const char *baseName, char *buf, size_t size )
{
char *envPath;
char *part;
size_t length;
size_t baseNameLength;
size_t needTrailingSlash;
if( !baseName || !baseName[0] )
return false;
envPath = getenv( "PATH" );
if( !COM_CheckString( envPath ) )
return false;
baseNameLength = Q_strlen( baseName );
while( *envPath )
{
part = Q_strchr( envPath, ':' );
if( part )
length = part - envPath;
else
length = Q_strlen( envPath );
if( length > 0 )
{
needTrailingSlash = ( envPath[length - 1] == '/' ) ? 0 : 1;
if( length + baseNameLength + needTrailingSlash < size )
{
Q_strncpy( buf, envPath, length + 1 );
if( needTrailingSlash )
Q_strcpy( buf + length, "/" );
Q_strcpy( buf + length + needTrailingSlash, baseName );
buf[length + needTrailingSlash + baseNameLength] = '\0';
if( access( buf, X_OK ) == 0 )
return true;
}
}
envPath += length;
if( *envPath == ':' )
envPath++;
}
return false;
}
#if !XASH_ANDROID
void Platform_ShellExecute( const char *path, const char *parms )
{
char xdgOpen[128];
if( !Q_strcmp( path, GENERIC_UPDATE_PAGE ) || !Q_strcmp( path, PLATFORM_UPDATE_PAGE ))
path = DEFAULT_UPDATE_PAGE;
if( Sys_FindExecutable( OPEN_COMMAND, xdgOpen, sizeof( xdgOpen ) ) )
{
const char *argv[] = { xdgOpen, path, NULL };
pid_t id = fork( );
if( id == 0 )
{
execv( xdgOpen, (char **)argv );
fprintf( stderr, "error opening %s %s", xdgOpen, path );
_exit( 1 );
}
}
else
{
Con_Reportf( S_WARN "Could not find "OPEN_COMMAND" utility\n" );
}
}
#endif // XASH_ANDROID
void Posix_Daemonize( void )
{
// to be accessed later
if( ( host.daemonized = Sys_CheckParm( "-daemonize" ) ) )
{
#if XASH_POSIX && defined(_POSIX_VERSION) && !defined(XASH_MOBILE_PLATFORM)
pid_t daemon;
daemon = fork();
if( daemon < 0 )
{
Host_Error( "fork() failed: %s\n", strerror( errno ) );
}
if( daemon > 0 )
{
// parent
Con_Reportf( "Child pid: %i\n", daemon );
exit( 0 );
}
else
{
// don't be closed by parent
if( setsid() < 0 )
{
Host_Error( "setsid() failed: %s\n", strerror( errno ) );
}
// set permissions
umask( 0 );
// engine will still use stdin/stdout,
// so just redirect them to /dev/null
close( STDIN_FILENO );
close( STDOUT_FILENO );
close( STDERR_FILENO );
open("/dev/null", O_RDONLY); // becomes stdin
open("/dev/null", O_RDWR); // stdout
open("/dev/null", O_RDWR); // stderr
// fallthrough
}
#elif defined(XASH_MOBILE_PLATFORM)
Sys_Error( "Can't run in background on mobile platforms!" );
#else
Sys_Error( "Daemonize not supported on this platform!" );
#endif
}
}
#if !XASH_SDL && !XASH_ANDROID
void Platform_Init( void )
{
Posix_Daemonize();
}
void Platform_Shutdown( void ) {}
#endif
#if XASH_TIMER == TIMER_POSIX
double Platform_DoubleTime( void )
{
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (double) ts.tv_sec + (double) ts.tv_nsec/1000000000.0;
}
void Platform_Sleep( int msec )
{
usleep( msec * 1000 );
}
#endif // XASH_TIMER == TIMER_POSIX