libc/src/unistd/linux/linkat.cpp

   1 //===-- Linux implementation of linkat ------------------------------------===//
   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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/unistd/linkat.h"
  10
  11 #include "src/__support/OSUtil/syscall.h" // For internal syscall function.
  12 #include "src/__support/common.h"
  13
  14 #include "src/errno/libc_errno.h"
  15 #include <fcntl.h>
  16 #include <sys/syscall.h> // For syscall numbers.
  17
  18 namespace __llvm_libc {
  19
  20 LLVM_LIBC_FUNCTION(int, linkat,
  21                    (int fd1, const char *path1, int fd2, const char *path2,
  22                     int flags)) {
  23   long ret =
  24       __llvm_libc::syscall_impl(SYS_linkat, fd1, path1, fd2, path2, flags);
  25   if (ret < 0) {
  26     libc_errno = -ret;
  27     return -1;
  28   }
  29   return ret;
  30 }
  31
  32 } // namespace __llvm_libc