libc/src/sys/xattr/linux/fgetxattr.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Implementation of fgetxattr.
///
//===----------------------------------------------------------------------===//

#include "src/sys/xattr/fgetxattr.h"
#include "src/__support/OSUtil/linux/syscall_wrappers/fgetxattr.h"
#include "src/__support/common.h"
#include "src/__support/libc_errno.h"
#include "src/__support/macros/config.h"
#include "src/__support/macros/null_check.h"

namespace LIBC_NAMESPACE_DECL {

LLVM_LIBC_FUNCTION(ssize_t, fgetxattr,
                   (int fd, const char *name, void *value, size_t size)) {
  LIBC_CRASH_ON_NULLPTR(name);
  if (size != 0)
    LIBC_CRASH_ON_NULLPTR(value);

  ErrorOr<ssize_t> ret = linux_syscalls::fgetxattr(fd, name, value, size);
  if (!ret) {
    libc_errno = ret.error();
    return -1;
  }
  return *ret;
}

} // namespace LIBC_NAMESPACE_DECL