1 /* POSIX compatible read() function.
2 Copyright (C) 2008-2014 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2011.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
28 # define WIN32_LEAN_AND_MEAN /* avoid including junk */
31 # include "msvc-inval.h"
32 # include "msvc-nothrow.h"
36 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
38 read_nothrow (int fd
, void *buf
, size_t count
)
44 result
= read (fd
, buf
, count
);
56 # define read_nothrow read
60 rpl_read (int fd
, void *buf
, size_t count
)
62 ssize_t ret
= read_nothrow (fd
, buf
, count
);
64 # if GNULIB_NONBLOCKING
66 && GetLastError () == ERROR_NO_DATA
)
68 HANDLE h
= (HANDLE
) _get_osfhandle (fd
);
69 if (GetFileType (h
) == FILE_TYPE_PIPE
)
71 /* h is a pipe or socket. */
73 if (GetNamedPipeHandleState (h
, &state
, NULL
, NULL
, NULL
, NULL
, 0)
74 && (state
& PIPE_NOWAIT
) != 0)
75 /* h is a pipe in non-blocking mode.
76 Change errno from EINVAL to EAGAIN. */