4.4BSD/usr/src/contrib/groff-1.08/groff/pipeline.h

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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
     Written by James Clark (jjc@jclark.com)

This file is part of groff.

groff 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 2, or (at your option) any later
version.

groff 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 groff; see the file COPYING.  If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */

#ifdef __cplusplus
extern "C" {
  int run_pipeline(int, char ***);
}
#endif

/* run_pipeline can handle at most this many commands */
#define MAX_COMMANDS 10

/* Children exit with this status if execvp fails. */
#define EXEC_FAILED_EXIT_STATUS 0xff