1 /* -*- buffer-read-only: t -*- vi: set ro: */
2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
3 /* POSIX compatible write() function.
4 Copyright (C) 2008-2014 Free Software Foundation, Inc.
5 Written by Bruno Haible <bruno@clisp.org>, 2008.
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 /* On native Windows platforms, SIGPIPE does not exist. When write() is
26 called on a pipe with no readers, WriteFile() fails with error
27 GetLastError() = ERROR_NO_DATA, and write() in consequence fails with
30 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
36 # define WIN32_LEAN_AND_MEAN /* avoid including junk */
39 # include "msvc-inval.h"
40 # include "msvc-nothrow.h"
44 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
46 write_nothrow (int fd, const void *buf, size_t count)
52 result = write (fd, buf, count);
64 # define write_nothrow write
68 rpl_write (int fd, const void *buf, size_t count)
72 ssize_t ret = write_nothrow (fd, buf, count);
76 # if GNULIB_NONBLOCKING
79 HANDLE h = (HANDLE) _get_osfhandle (fd);
80 if (GetFileType (h) == FILE_TYPE_PIPE)
82 /* h is a pipe or socket. */
84 if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL,
86 && (state & PIPE_NOWAIT) != 0)
88 /* h is a pipe in non-blocking mode.
89 We can get here in four situations:
90 1. When the pipe buffer is full.
91 2. When count <= pipe_buf_size and the number of
92 free bytes in the pipe buffer is < count.
93 3. When count > pipe_buf_size and the number of free
94 bytes in the pipe buffer is > 0, < pipe_buf_size.
95 4. When count > pipe_buf_size and the pipe buffer is
97 The cases 1 and 2 are POSIX compliant. In cases 3 and
98 4 POSIX specifies that write() must split the request
99 and succeed with a partial write. We fix case 4.
100 We don't fix case 3 because it is not essential for
102 DWORD out_size; /* size of the buffer for outgoing data */
103 DWORD in_size; /* size of the buffer for incoming data */
104 if (GetNamedPipeInfo (h, NULL, &out_size, &in_size, NULL))
106 size_t reduced_count = count;
107 /* In theory we need only one of out_size, in_size.
108 But I don't know which of the two. The description
110 if (out_size != 0 && out_size < reduced_count)
111 reduced_count = out_size;
112 if (in_size != 0 && in_size < reduced_count)
113 reduced_count = in_size;
114 if (reduced_count < count)
116 /* Attempt to write only the first part. */
117 count = reduced_count;
121 /* Change errno from ENOSPC to EAGAIN. */
130 if (GetLastError () == ERROR_NO_DATA
131 && GetFileType ((HANDLE) _get_osfhandle (fd))
134 /* Try to raise signal SIGPIPE. */
136 /* If it is currently blocked or ignored, change errno from