eval.h revision 4f6e8d7a00cbeda1e70cc15be9c4af1018bdad53 
1/*	$NetBSD: eval.h,v 1.14 2003/08/07 09:05:31 agc 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. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)eval.h	8.2 (Berkeley) 5/4/95
35 */
36
37extern char *commandname;	/* currently executing command */
38extern int exitstatus;		/* exit status of last command */
39extern int back_exitstatus;	/* exit status of backquoted command */
40extern struct strlist *cmdenviron;  /* environment for builtin command */
41
42
43struct backcmd {		/* result of evalbackcmd */
44	int fd;			/* file descriptor to read from */
45	char *buf;		/* buffer */
46	int nleft;		/* number of chars in buffer */
47	struct job *jp;		/* job structure for command */
48};
49
50void evalstring(char *, int);
51union node;	/* BLETCH for ansi C */
52void evaltree(union node *, int);
53void evalbackcmd(union node *, struct backcmd *);
54
55/* in_function returns nonzero if we are currently evaluating a function */
56#define in_function()	funcnest
57extern int funcnest;
58extern int evalskip;
59
60/* reasons for skipping commands (see comment on breakcmd routine) */
61#define SKIPBREAK	1
62#define SKIPCONT	2
63#define SKIPFUNC	3
64#define SKIPFILE	4
65