63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
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/* POSIX compatible write() function.
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Copyright (C) 2008 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2008.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <unistd.h>
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/* Replace this function only if module 'sigpipe' is requested. */
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#if GNULIB_SIGPIPE
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/* On native Windows platforms, SIGPIPE does not exist. When write() is
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called on a pipe with no readers, WriteFile() fails with error
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GetLastError() = ERROR_NO_DATA, and write() in consequence fails with
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error EINVAL. */
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# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
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# include <errno.h>
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# include <signal.h>
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# include <io.h>
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# define WIN32_LEAN_AND_MEAN /* avoid including junk */
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# include <windows.h>
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ssize_t
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rpl_write (int fd, const void *buf, size_t count)
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#undef write
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{
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ssize_t ret = write (fd, buf, count);
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if (ret < 0)
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{
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if (GetLastError () == ERROR_NO_DATA
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&& GetFileType (_get_osfhandle (fd)) == FILE_TYPE_PIPE)
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{
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/* Try to raise signal SIGPIPE. */
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raise (SIGPIPE);
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/* If it is currently blocked or ignored, change errno from EINVAL
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to EPIPE. */
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errno = EPIPE;
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}
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}
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return ret;
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}
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# endif
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#endif
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