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/* Test whether a file descriptor is a pipe.
Copyright (C) 2006-2023 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* This file uses HAVE_FIFO_PIPES. */
#if !_GL_CONFIG_H_INCLUDED
#error "Please include config.h first."
#endif
/* Whether pipes are FIFOs; -1 if not known. */
#ifndef HAVE_FIFO_PIPES
# define HAVE_FIFO_PIPES (-1)
#endif
int isapipe (int fd);
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