105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <string.h>
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#include <syscall.h>
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extern "C" {
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int fcntl(int fd, int cmd, ...)
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{
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va_list ap;
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va_start(ap, cmd);
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u32 extra_arg = va_arg(ap, u32);
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int rc = syscall(SC_fcntl, fd, cmd, extra_arg);
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va_end(ap);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int create_inode_watcher(unsigned flags)
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{
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int rc = syscall(SC_create_inode_watcher, flags);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int inode_watcher_add_watch(int fd, char const* path, size_t path_length, unsigned event_mask)
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{
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Syscall::SC_inode_watcher_add_watch_params params { { path, path_length }, fd, event_mask };
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int rc = syscall(SC_inode_watcher_add_watch, ¶ms);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int inode_watcher_remove_watch(int fd, int wd)
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{
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int rc = syscall(SC_inode_watcher_remove_watch, fd, wd);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int creat(char const* path, mode_t mode)
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{
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return open(path, O_CREAT | O_WRONLY | O_TRUNC, mode);
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}
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int open(char const* path, int options, ...)
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{
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if (!path) {
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errno = EFAULT;
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return -1;
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}
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auto path_length = strlen(path);
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if (path_length > INT32_MAX) {
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errno = EINVAL;
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return -1;
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}
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va_list ap;
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va_start(ap, options);
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auto mode = (mode_t)va_arg(ap, unsigned);
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va_end(ap);
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Syscall::SC_open_params params { AT_FDCWD, { path, path_length }, options, mode };
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int rc = syscall(SC_open, ¶ms);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int openat(int dirfd, char const* path, int options, ...)
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{
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if (!path) {
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errno = EFAULT;
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return -1;
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}
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auto path_length = strlen(path);
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if (path_length > INT32_MAX) {
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errno = EINVAL;
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return -1;
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}
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va_list ap;
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va_start(ap, options);
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auto mode = (mode_t)va_arg(ap, unsigned);
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va_end(ap);
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Syscall::SC_open_params params { dirfd, { path, path_length }, options, mode };
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int rc = syscall(SC_open, ¶ms);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_fadvise.html
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int posix_fadvise(int fd, off_t offset, off_t len, int advice)
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{
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// Per POSIX:
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// "The posix_fadvise() function shall have no effect on the semantics of other operations on the specified data,
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// although it may affect the performance of other operations."
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// For now, we simply ignore posix_fadvise() requests. In the future we may use them to optimize performance.
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(void)fd;
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(void)offset;
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(void)len;
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(void)advice;
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return 0;
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}
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}
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