#include "git-compat-util.h"

#include "nonblock.h"

#ifdef O_NONBLOCK

int enable_pipe_nonblock(int fd)

{

  int flags = fcntl(fd, F_GETFL);

  if (flags < 0)

    return -1;

  flags |= O_NONBLOCK;

  return fcntl(fd, F_SETFL, flags);

}

#elif defined(GIT_WINDOWS_NATIVE)

#include "win32.h"

int enable_pipe_nonblock(int fd)

{

  HANDLE h = (HANDLE)_get_osfhandle(fd);

  DWORD mode;

  DWORD type = GetFileType(h);

  if (type == FILE_TYPE_UNKNOWN && GetLastError() != NO_ERROR) {

    errno = EBADF;

    return -1;

  }

  if (type != FILE_TYPE_PIPE)

    BUG("unsupported file type: %lu", type);

  if (!GetNamedPipeHandleState(h, &mode, NULL, NULL, NULL, NULL, 0)) {

    errno = err_win_to_posix(GetLastError());

    return -1;

  }

  mode |= PIPE_NOWAIT;

  if (!SetNamedPipeHandleState(h, &mode, NULL, NULL)) {

    errno = err_win_to_posix(GetLastError());

    return -1;

  }

  return 0;

}

#else

int enable_pipe_nonblock(int fd UNUSED)

{

  errno = ENOSYS;

  return -1;

}

#endif