libc/src/fcntl/linux/creat.cpp

   1 //===-- Implementation of creat -------------------------------------------===//
   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/fcntl/creat.h"
  10
  11 #include "src/__support/OSUtil/syscall.h" // For internal syscall function.
  12 #include "src/__support/common.h"
  13 #include "src/errno/libc_errno.h"
  14
  15 #include <fcntl.h>
  16 #include <sys/syscall.h> // For syscall numbers.
  17
  18 namespace __llvm_libc {
  19
  20 LLVM_LIBC_FUNCTION(int, creat, (const char *path, int mode_flags)) {
  21 #ifdef SYS_open
  22   int fd = __llvm_libc::syscall_impl(SYS_open, path,
  23                                      O_CREAT | O_WRONLY | O_TRUNC, mode_flags);
  24 #else
  25   int fd = __llvm_libc::syscall_impl(SYS_openat, AT_FDCWD, path,
  26                                      O_CREAT | O_WRONLY | O_TRUNC, mode_flags);
  27 #endif
  28
  29   if (fd > 0)
  30     return fd;
  31
  32   libc_errno = -fd;
  33   return -1;
  34 }
  35
  36 } // namespace __llvm_libc