| /* POSIX compatible read() function. |
| Copyright (C) 2008-2011 Free Software Foundation, Inc. |
| Written by Bruno Haible <bruno@clisp.org>, 2011. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #include <unistd.h> |
| |
| /* Replace this function only if module 'nonblocking' is requested. */ |
| #if GNULIB_NONBLOCKING |
| |
| # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
| |
| # include <errno.h> |
| # include <io.h> |
| |
| # define WIN32_LEAN_AND_MEAN /* avoid including junk */ |
| # include <windows.h> |
| |
| ssize_t |
| rpl_read (int fd, void *buf, size_t count) |
| #undef read |
| { |
| ssize_t ret = read (fd, buf, count); |
| |
| if (ret < 0 |
| && GetLastError () == ERROR_NO_DATA) |
| { |
| HANDLE h = (HANDLE) _get_osfhandle (fd); |
| if (GetFileType (h) == FILE_TYPE_PIPE) |
| { |
| /* h is a pipe or socket. */ |
| DWORD state; |
| if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0) |
| && (state & PIPE_NOWAIT) != 0) |
| /* h is a pipe in non-blocking mode. |
| Change errno from EINVAL to EAGAIN. */ |
| errno = EAGAIN; |
| } |
| } |
| return ret; |
| } |
| |
| # endif |
| #endif |