eval.h revision 194128 
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 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	@(#)eval.h	8.2 (Berkeley) 5/4/95
33 * $FreeBSD: head/bin/sh/eval.h 194128 2009-06-13 21:17:45Z jilles $
34 */
35
36extern char *commandname;	/* currently executing command */
37extern int exitstatus;		/* exit status of last command */
38extern struct strlist *cmdenviron;  /* environment for builtin command */
39
40
41struct backcmd {		/* result of evalbackcmd */
42	int fd;			/* file descriptor to read from */
43	char *buf;		/* buffer */
44	int nleft;		/* number of chars in buffer */
45	struct job *jp;		/* job structure for command */
46};
47
48/* flags in argument to evaltree/evalstring */
49#define EV_EXIT 01		/* exit after evaluating tree */
50#define EV_TESTED 02		/* exit status is checked; ignore -e flag */
51#define EV_BACKCMD 04		/* command executing within back quotes */
52
53int evalcmd(int, char **);
54void evalstring(char *, int);
55union node;	/* BLETCH for ansi C */
56void evaltree(union node *, int);
57void evalbackcmd(union node *, struct backcmd *);
58int bltincmd(int, char **);
59int breakcmd(int, char **);
60int returncmd(int, char **);
61int falsecmd(int, char **);
62int truecmd(int, char **);
63int execcmd(int, char **);
64int timescmd(int, char **);
65int commandcmd(int, char **);
66
67/* in_function returns nonzero if we are currently evaluating a function */
68#define in_function()	funcnest
69extern int funcnest;
70extern int evalskip;
71
72/* reasons for skipping commands (see comment on breakcmd routine) */
73#define SKIPBREAK	1
74#define SKIPCONT	2
75#define SKIPFUNC	3
76#define SKIPFILE	4
77