lib/isapipe.h

   1 /* Test whether a file descriptor is a pipe.
   2
   3    Copyright (C) 2006-2024 Free Software Foundation, Inc.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation, either version 3 of the
   8    License, or (at your option) any later version.
   9
  10    This file 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 Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* This file uses HAVE_FIFO_PIPES.  */
  19 #if !_GL_CONFIG_H_INCLUDED
  20  #error "Please include config.h first."
  21 #endif
  22
  23 /* Whether pipes are FIFOs; -1 if not known.  */
  24 #ifndef HAVE_FIFO_PIPES
  25 # define HAVE_FIFO_PIPES (-1)
  26 #endif
  27
  28 int isapipe (int fd);