shithub: lwext4

ref: 17c247fab25759dff04070a9b81b8d008618d6f8
dir: /demos/stm32f429_disco/syscalls.c/

/*
 * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/stat.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <signal.h>
#include <time.h>

#include <lcd_log.h>

int _getpid(void) { return 1; }

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

void _exit(int status)
{
	_kill(status, -1);
	while (1) {
	} /* Make sure we hang here */
}

int _write(int file, char *ptr, int len)
{
	int todo;

	for (todo = 0; todo < len; todo++) {
		__io_putchar(*ptr++);
	}

	/* Implement your write code here, this is used by puts and printf for
	 * example */
	return len;
}

caddr_t _sbrk(int incr)
{
	extern char __heap_start;
	extern char __heap_end;
	static char *current_heap_end = &__heap_start;
	char *previous_heap_end;

	previous_heap_end = current_heap_end;

	if (current_heap_end + incr > &__heap_end) {
		errno = ENOMEM;
		return (caddr_t)-1;
	}

	current_heap_end += incr;

	return (caddr_t)previous_heap_end;
}

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

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

int _isatty(int file) { return 1; }

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

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

int _open(char *path, int flags, ...)
{
	/* Pretend like we always fail */
	return -1;
}

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

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

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

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

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

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