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135 lines
2.8 KiB
135 lines
2.8 KiB
/* |
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* Copyright (C) 2014 René Kijewski <rene.kijewski@fu-berlin.de> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @ingroup x86 |
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* @{ |
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* |
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* @file |
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* @brief The interface between newlib and kernel functions. |
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* |
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* @author René Kijewski <rene.kijewski@fu-berlin.de> |
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* |
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* @} |
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*/ |
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#include "kernel_defines.h" |
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#include "cpu.h" |
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#include "sched.h" |
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#include "x86_uart.h" |
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#include <signal.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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void _exit(int status) |
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{ |
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(void) status; |
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sched_task_exit(); |
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UNREACHABLE(); |
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} |
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#ifndef MODULE_POSIX |
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/* Already defined in /sys/posix/unistd.c */ |
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int close(int fildes) |
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{ |
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/* TODO */ |
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(void) fildes; |
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return -1; |
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} |
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#endif |
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pid_t getpid(void) |
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{ |
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return (pid_t) sched_active_pid; |
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} |
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int fstat(int fildes, struct stat *buf) |
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{ |
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/* TODO */ |
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(void) fildes; |
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(void) buf; |
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return -1; |
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} |
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int isatty(int fildes) |
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{ |
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/* TODO */ |
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(void) fildes; |
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return 0; /* sic */ |
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} |
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int kill(pid_t pid, int sig) |
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{ |
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/* TODO */ |
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(void) pid; |
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(void) sig; |
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return -1; |
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} |
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off_t lseek(int fildes, off_t offset, int whence) |
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{ |
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/* TODO */ |
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(void) fildes; |
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(void) offset; |
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(void) whence; |
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return (off_t) -1; |
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} |
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ssize_t read(int fildes, void *buf, size_t nbyte) |
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{ |
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if (nbyte == 0) { |
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/* allow reading nothing from every FD ... */ |
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return 0; |
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} |
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else if (fildes == STDOUT_FILENO || fildes == STDERR_FILENO) { |
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/* cannot read from STDOUT or STDERR */ |
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return -1; |
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} |
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else if (fildes == STDIN_FILENO) { |
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return x86_uart_read(buf, nbyte); |
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} |
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/* TODO: find appropriate FILE */ |
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(void) fildes; |
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(void) buf; |
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(void) nbyte; |
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return -1; |
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} |
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ssize_t write(int fildes, const void *buf, size_t nbyte) |
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{ |
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if (nbyte == 0) { |
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/* allow writing nothing to every FD ... */ |
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return 0; |
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} |
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else if (fildes == STDIN_FILENO) { |
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/* cannot write to STDIN */ |
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return -1; |
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} |
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else if (fildes == STDOUT_FILENO || fildes == STDERR_FILENO) { |
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return x86_uart_write(buf, nbyte); |
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} |
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/* TODO: find appropriate FILE */ |
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(void) fildes; |
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(void) buf; |
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(void) nbyte; |
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return -1; |
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}
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