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Apply stricter pledge rules if possible. These are based on the usage of
the 'w' and 'r' functions and the 'w' flag to the 's' function.

If non of the above is used and input is being read from stdin, we drop
all the way down to stdio!

Original inspiration by benno@.

OK millert@

/*	$OpenBSD: extern.h,v 1.13 2017/08/01 18:05:53 martijn Exp $ */
/*-
 * Copyright (c) 1992 Diomidis Spinellis.
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Diomidis Spinellis of Imperial College, University of London.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)extern.h	8.1 (Berkeley) 6/6/93
 */

extern struct s_command *prog;
extern struct s_appends *appends;
extern regmatch_t *match;
extern size_t maxnsub;
extern u_long linenum;
extern size_t appendnum;
extern int Eflag, aflag, eflag, nflag;
extern int pledge_wpath, pledge_rpath;
extern const char *fname, *outfname;
extern FILE *infile, *outfile;

void	 cfclose(struct s_command *, struct s_command *);
void	 compile(void);
void	 cspace(SPACE *, const char *, size_t, enum e_spflag);
char	*cu_fgets(char **, size_t *);
__dead void error(int, const char *, ...);
void	warning(const char *, ...);
int	 mf_fgets(SPACE *, enum e_spflag);
int	 lastline(void);
void	 process(void);
void	 resetranges(void);
char	*strregerror(int, regex_t *);
void	*xmalloc(size_t);
void	*xreallocarray(void *, size_t, size_t);
void	*xrealloc(void *, size_t);