#include <osbind.h>

static	long	(*shell_p)();
extern	int	errno;

static
read_shell()
{
	long	*_shell_p = (long *) 0x4F6L;

	shell_p = (long (*)())(*_shell_p);
}

static int
init_system()
{
	int	ret;

	Supexec(read_shell);
	if(!(long)shell_p) return(0);
	ret = 1;
	if((*((long *)(((long) shell_p)-10)) == 0x00420135L))
		ret = 2; /* Gulam */
	if((*((long *)(((long) shell_p)-4)) == 0xCDCEC5D2L) || /* Master 5.0 */
	   (*((long *)(((long) shell_p)-8)) == 0x4D415354L))   /* Master 5.4 */
		ret = 3; /* Master */
	return(ret);
}

long
system(cmd)
char	*cmd;
{
	if(init_system()) return(errno = (shell_p[0])(cmd));
	return(-1L);
}

long
m_getenv(cmd)
char	*cmd;
{
	extern long	getenv();

	if(init_system() == 3) return((shell_p[4])(1L,cmd));
	return(getenv(cmd));
}