101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
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/* Copyright (c) 2016 Phoenix Systems
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.*/
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#include "syscall.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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int open(const char *pathname, int flags, ...)
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{
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int mode = S_IFREG | S_IRWXUGO;
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if (flags & O_CREAT) {
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va_list arg;
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va_start(arg, flags);
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mode = va_arg(arg, int);
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va_end(arg);
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}
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int ret = syscall3(int, SYS_OPEN, pathname, flags, mode);
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if (ret < 0) {
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errno = -ret;
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return -1;
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}
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return ret;
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}
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ssize_t read(int fd, void *buf, size_t count)
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{
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int ret = syscall3(int, SYS_READ, fd, buf, count);
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if (ret < 0) {
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errno = -ret;
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return -1;
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}
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return ret;
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}
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ssize_t write(int fd, const void *buf, size_t count)
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{
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int ret = syscall3(int, SYS_WRITE, fd, buf, count);
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if (ret < 0) {
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errno = -ret;
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return -1;
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}
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return ret;
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}
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off_t lseek(int fd, off_t offset, int whence)
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{
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int ret = syscall3(int, SYS_LSEEK, fd, offset, whence);
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if (ret < 0) {
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errno = -ret;
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return -1;
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}
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return ret;
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}
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int close(int fd)
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{
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int ret = syscall1(int, SYS_CLOSE, fd);
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if (ret < 0) {
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errno = -ret;
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return -1;
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}
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return ret;
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}
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int _close(int fd)
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{
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return close(fd);
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}
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