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/*
* Copyright (C) 2014 René Kijewski <rene.kijewski@fu-berlin.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @ingroup x86
* @{
*
* @file
* @brief The interface between newlib and kernel functions.
*
* @author René Kijewski <rene.kijewski@fu-berlin.de>
*
* @}
*/
#include "kernel_defines.h"
#include "cpu.h"
#include "sched.h"
#include "x86_uart.h"
#include <signal.h>
#include <sys/stat.h>
#include <unistd.h>
void _exit(int status)
{
(void) status;
sched_task_exit();
UNREACHABLE();
}
#ifndef MODULE_POSIX
/* Already defined in /sys/posix/unistd.c */
int close(int fildes)
{
/* TODO */
(void) fildes;
return -1;
}
#endif
pid_t getpid(void)
{
return (pid_t) sched_active_pid;
}
int fstat(int fildes, struct stat *buf)
{
/* TODO */
(void) fildes;
(void) buf;
return -1;
}
int isatty(int fildes)
{
/* TODO */
(void) fildes;
return 0; /* sic */
}
int kill(pid_t pid, int sig)
{
/* TODO */
(void) pid;
(void) sig;
return -1;
}
off_t lseek(int fildes, off_t offset, int whence)
{
/* TODO */
(void) fildes;
(void) offset;
(void) whence;
return (off_t) -1;
}
ssize_t read(int fildes, void *buf, size_t nbyte)
{
if (nbyte == 0) {
/* allow reading nothing from every FD ... */
return 0;
}
else if (fildes == STDOUT_FILENO || fildes == STDERR_FILENO) {
/* cannot read from STDOUT or STDERR */
return -1;
}
else if (fildes == STDIN_FILENO) {
return x86_uart_read(buf, nbyte);
}
/* TODO: find appropriate FILE */
(void) fildes;
(void) buf;
(void) nbyte;
return -1;
}
ssize_t write(int fildes, const void *buf, size_t nbyte)
{
if (nbyte == 0) {
/* allow writing nothing to every FD ... */
return 0;
}
else if (fildes == STDIN_FILENO) {
/* cannot write to STDIN */
return -1;
}
else if (fildes == STDOUT_FILENO || fildes == STDERR_FILENO) {
return x86_uart_write(buf, nbyte);
}
/* TODO: find appropriate FILE */
(void) fildes;
(void) buf;
(void) nbyte;
return -1;
}