#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/times.h>

#undef errno


#ifdef __cplusplus
extern "C" {
#endif
extern int errno;

char *__env[1] = { 0 };
char **environ = __env;

int _exit() 
{
	while(1);
}

int _close(int file) {
return -1;
}

int _write(int file, char *ptr, int len) {
int todo;
for (todo = 0; todo < len; todo++) {
//outbyte (*ptr++);
}
return len;
}

int _execve(char *name, char **argv, char **env) {
errno = ENOMEM;
return -1;
}


int _fork(void) {
errno = EAGAIN;
return -1;
}

int _fstat(int file, struct stat *st) {
st->st_mode = S_IFCHR;
return 0;
}


int _getpid(void) {
return 1;
}


int _isatty(int file) {
return 1;
}


int _kill(int pid, int sig) {
errno = EINVAL;
return -1;
}


int _link(char *old, char *new) {
errno = EMLINK;
return -1;
}


int _lseek(int file, int ptr, int dir) {
return 0;
}

int _open(const char *name, int flags, int mode) {
return -1;
}

int _read(int file, char *ptr, int len) {
return 0;
}



caddr_t _sbrk(int incr) {
register char * stack_ptr __asm__ ("sp");
extern char _end; /* Defined by the linker */
static char *heap_end;
char *prev_heap_end;
if (heap_end == 0) {
heap_end = &_end;
}
prev_heap_end = heap_end;
if (heap_end + incr > stack_ptr) {
_write (1, "Heap and stack collision\n", 25);
abort ();
}
heap_end += incr;
return (caddr_t) prev_heap_end;
}



int _stat(char *file, struct stat *st) {
st->st_mode = S_IFCHR;
return 0;
}


int _times(struct tms *buf) {
return -1;
}


int _unlink(char *name) {
errno = ENOENT;
return -1;
}

int _wait(int *status) {
errno = ECHILD;
return -1;
}


#ifdef __cplusplus
}
#endif