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/* POSIX compatible write() function.
Copyright (C) 2008-2010 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2008.
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 'sigpipe' is requested. */
#if GNULIB_SIGPIPE
/* On native Windows platforms, SIGPIPE does not exist. When write() is
called on a pipe with no readers, WriteFile() fails with error
GetLastError() = ERROR_NO_DATA, and write() in consequence fails with
error EINVAL. */
# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
# include <errno.h>
# include <signal.h>
# include <io.h>
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
# include <windows.h>
ssize_t
rpl_write (int fd, const void *buf, size_t count)
#undef write
{
ssize_t ret = write (fd, buf, count);
if (ret < 0)
{
if (GetLastError () == ERROR_NO_DATA
&& GetFileType ((HANDLE) _get_osfhandle (fd)) == FILE_TYPE_PIPE)
{
/* Try to raise signal SIGPIPE. */
raise (SIGPIPE);
/* If it is currently blocked or ignored, change errno from EINVAL
to EPIPE. */
errno = EPIPE;
}
}
return ret;
}
# endif
#endif
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