eval.h revision 17987
11556Srgrimes/*-
21556Srgrimes * Copyright (c) 1991, 1993
31556Srgrimes *	The Regents of the University of California.  All rights reserved.
41556Srgrimes *
51556Srgrimes * This code is derived from software contributed to Berkeley by
61556Srgrimes * Kenneth Almquist.
71556Srgrimes *
81556Srgrimes * Redistribution and use in source and binary forms, with or without
91556Srgrimes * modification, are permitted provided that the following conditions
101556Srgrimes * are met:
111556Srgrimes * 1. Redistributions of source code must retain the above copyright
121556Srgrimes *    notice, this list of conditions and the following disclaimer.
131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright
141556Srgrimes *    notice, this list of conditions and the following disclaimer in the
151556Srgrimes *    documentation and/or other materials provided with the distribution.
161556Srgrimes * 3. All advertising materials mentioning features or use of this software
171556Srgrimes *    must display the following acknowledgement:
181556Srgrimes *	This product includes software developed by the University of
191556Srgrimes *	California, Berkeley and its contributors.
201556Srgrimes * 4. Neither the name of the University nor the names of its contributors
211556Srgrimes *    may be used to endorse or promote products derived from this software
221556Srgrimes *    without specific prior written permission.
231556Srgrimes *
241556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
251556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
261556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
271556Srgrimes * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
281556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
291556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
301556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
311556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
321556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
331556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
341556Srgrimes * SUCH DAMAGE.
351556Srgrimes *
3617987Speter *	@(#)eval.h	8.2 (Berkeley) 5/4/95
3717987Speter *	$Id: eval.h,v 1.2 1994/09/24 02:57:31 davidg Exp $
381556Srgrimes */
391556Srgrimes
401556Srgrimesextern char *commandname;	/* currently executing command */
411556Srgrimesextern int exitstatus;		/* exit status of last command */
421556Srgrimesextern struct strlist *cmdenviron;  /* environment for builtin command */
431556Srgrimes
441556Srgrimes
451556Srgrimesstruct backcmd {		/* result of evalbackcmd */
461556Srgrimes	int fd;			/* file descriptor to read from */
471556Srgrimes	char *buf;		/* buffer */
481556Srgrimes	int nleft;		/* number of chars in buffer */
491556Srgrimes	struct job *jp;		/* job structure for command */
501556Srgrimes};
511556Srgrimes
5217987Speterint evalcmd __P((int, char **));
5317987Spetervoid evalstring __P((char *));
541556Srgrimesunion node;	/* BLETCH for ansi C */
5517987Spetervoid evaltree __P((union node *, int));
5617987Spetervoid evalbackcmd __P((union node *, struct backcmd *));
5717987Speterint bltincmd __P((int, char **));
5817987Speterint breakcmd __P((int, char **));
5917987Speterint returncmd __P((int, char **));
6017987Speterint falsecmd __P((int, char **));
6117987Speterint truecmd __P((int, char **));
6217987Speterint execcmd __P((int, char **));
631556Srgrimes
641556Srgrimes/* in_function returns nonzero if we are currently evaluating a function */
651556Srgrimes#define in_function()	funcnest
661556Srgrimesextern int funcnest;
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