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eval.h revision 1.9 
      1 /*	$NetBSD: eval.h,v 1.9 1995/09/11 17:05:43 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Kenneth Almquist.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)eval.h	8.2 (Berkeley) 5/4/95
     39  */
     40 
     41 extern char *commandname;	/* currently executing command */
     42 extern int exitstatus;		/* exit status of last command */
     43 extern struct strlist *cmdenviron;  /* environment for builtin command */
     44 
     45 
     46 struct backcmd {		/* result of evalbackcmd */
     47 	int fd;			/* file descriptor to read from */
     48 	char *buf;		/* buffer */
     49 	int nleft;		/* number of chars in buffer */
     50 	struct job *jp;		/* job structure for command */
     51 };
     52 
     53 int evalcmd __P((int, char **));
     54 void evalstring __P((char *));
     55 union node;	/* BLETCH for ansi C */
     56 void evaltree __P((union node *, int));
     57 void evalbackcmd __P((union node *, struct backcmd *));
     58 int bltincmd __P((int, char **));
     59 int breakcmd __P((int, char **));
     60 int returncmd __P((int, char **));
     61 int falsecmd __P((int, char **));
     62 int truecmd __P((int, char **));
     63 int execcmd __P((int, char **));
     64 
     65 /* in_function returns nonzero if we are currently evaluating a function */
     66 #define in_function()	funcnest
     67 extern int funcnest;
     68 extern int evalskip;
     69 
     70 /* reasons for skipping commands (see comment on breakcmd routine) */
     71 #define SKIPBREAK	1
     72 #define SKIPCONT	2
     73 #define SKIPFUNC	3
     74 #define SKIPFILE	4
     75