cosmopolitan/libc/intrin/reopenfile.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/syscall_support-nt.internal.h"
#include "libc/intrin/describeflags.internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/nt/files.h"
#include "libc/nt/runtime.h"
#include "libc/nt/thunk/msabi.h"

__msabi extern typeof(ReOpenFile) *const __imp_ReOpenFile;
__msabi extern typeof(GetLastError) *const __imp_GetLastError;

/**
 * Reopens file on the New Technology.
 *
 * @return handle, or -1 on failure
 */
int64_t ReOpenFile(int64_t hOriginalFile, uint32_t dwDesiredAccess,
                   uint32_t dwShareMode, uint32_t dwFlagsAndAttributes) {
  int64_t hHandle;
  hHandle = __imp_ReOpenFile(hOriginalFile, dwDesiredAccess, dwShareMode,
                             dwFlagsAndAttributes);
  NTTRACE("ReOpenFile(%ld, %s, %s, %s) → {%ld, %d}", hOriginalFile,
          DescribeNtFileAccessFlags(dwDesiredAccess),
          DescribeNtFileShareFlags(dwShareMode),
          DescribeNtFileFlagAttr(dwFlagsAndAttributes), hHandle,
          __imp_GetLastError());
  return hHandle;
}