eval.h revision 50471 
1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kenneth Almquist.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	@(#)eval.h	8.2 (Berkeley) 5/4/95
37 * $FreeBSD: head/bin/sh/eval.h 50471 1999-08-27 23:15:48Z peter $
38 */
39
40extern char *commandname;	/* currently executing command */
41extern int exitstatus;		/* exit status of last command */
42extern struct strlist *cmdenviron;  /* environment for builtin command */
43
44
45struct backcmd {		/* result of evalbackcmd */
46	int fd;			/* file descriptor to read from */
47	char *buf;		/* buffer */
48	int nleft;		/* number of chars in buffer */
49	struct job *jp;		/* job structure for command */
50};
51
52int evalcmd __P((int, char **));
53void evalstring __P((char *));
54union node;	/* BLETCH for ansi C */
55void evaltree __P((union node *, int));
56void evalbackcmd __P((union node *, struct backcmd *));
57int bltincmd __P((int, char **));
58int breakcmd __P((int, char **));
59int returncmd __P((int, char **));
60int falsecmd __P((int, char **));
61int truecmd __P((int, char **));
62int execcmd __P((int, char **));
63
64/* in_function returns nonzero if we are currently evaluating a function */
65#define in_function()	funcnest
66extern int funcnest;
67extern int evalskip;
68
69/* reasons for skipping commands (see comment on breakcmd routine) */
70#define SKIPBREAK	1
71#define SKIPCONT	2
72#define SKIPFUNC	3
73#define SKIPFILE	4
74