32 lines · cpp
1//===-- Linux implementation of lseek -------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/unistd/lseek.h"10#include "src/__support/libc_errno.h"11#include "src/__support/macros/config.h"12 13#include "src/__support/File/linux/lseekImpl.h"14#include "src/__support/OSUtil/syscall.h" // For internal syscall function.15#include "src/__support/common.h"16 17#include "hdr/types/off_t.h"18#include <sys/syscall.h> // For syscall numbers.19 20namespace LIBC_NAMESPACE_DECL {21 22LLVM_LIBC_FUNCTION(off_t, lseek, (int fd, off_t offset, int whence)) {23 auto result = internal::lseekimpl(fd, offset, whence);24 if (!result.has_value()) {25 libc_errno = result.error();26 return -1;27 }28 return result.value();29}30 31} // namespace LIBC_NAMESPACE_DECL32