1 /* POSIX compatible read() function.
2 Copyright (C) 2008-2018 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 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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
23 #if defined _WIN32 && ! defined __CYGWIN__
28 # define WIN32_LEAN_AND_MEAN /* avoid including junk */
31 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
32 # include "msvc-inval.h"
34 # if GNULIB_MSVC_NOTHROW
35 # include "msvc-nothrow.h"
42 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
44 read_nothrow (int fd
, void *buf
, size_t count
)
50 result
= read (fd
, buf
, count
);
62 # define read_nothrow read
66 rpl_read (int fd
, void *buf
, size_t count
)
68 ssize_t ret
= read_nothrow (fd
, buf
, count
);
70 # if GNULIB_NONBLOCKING
72 && GetLastError () == ERROR_NO_DATA
)
74 HANDLE h
= (HANDLE
) _get_osfhandle (fd
);
75 if (GetFileType (h
) == FILE_TYPE_PIPE
)
77 /* h is a pipe or socket. */
79 if (GetNamedPipeHandleState (h
, &state
, NULL
, NULL
, NULL
, NULL
, 0)
80 && (state
& PIPE_NOWAIT
) != 0)
81 /* h is a pipe in non-blocking mode.
82 Change errno from EINVAL to EAGAIN. */