/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst or https://cmake.org/licensing for details.  */

#include "cmGetPipes.h"

#include <cm3p/uv.h>

#include <fcntl.h>

#if defined(_WIN32) && !defined(__CYGWIN__)

#  include <io.h>

int cmGetPipes(int* fds)

{

  SECURITY_ATTRIBUTES attr;

  HANDLE readh, writeh;

  attr.nLength = sizeof(attr);

  attr.lpSecurityDescriptor = nullptr;

  attr.bInheritHandle = FALSE;

  if (!CreatePipe(&readh, &writeh, &attr, 0))

    return uv_translate_sys_error(GetLastError());

  fds[0] = _open_osfhandle((intptr_t)readh, 0);

  fds[1] = _open_osfhandle((intptr_t)writeh, 0);

  if (fds[0] == -1 || fds[1] == -1) {

    CloseHandle(readh);

    CloseHandle(writeh);

    return uv_translate_sys_error(GetLastError());

  }

  return 0;

}

#else

#  include <cerrno>

#  include <unistd.h>

int cmGetPipes(int* fds)

{

  if (pipe(fds) == -1) {

    return uv_translate_sys_error(errno);

  }

  if (fcntl(fds[0], F_SETFD, FD_CLOEXEC) == -1 ||

      fcntl(fds[1], F_SETFD, FD_CLOEXEC) == -1) {

    close(fds[0]);

    close(fds[1]);

    return uv_translate_sys_error(errno);

  }

  return 0;

}

#endif