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 *	@(#)exec.h	8.3 (Berkeley) 6/8/95
33 * $FreeBSD$
34 */
35
36/* values of cmdtype */
37#define CMDUNKNOWN -1		/* no entry in table for command */
38#define CMDNORMAL 0		/* command is an executable program */
39#define CMDBUILTIN 1		/* command is a shell builtin */
40#define CMDFUNCTION 2		/* command is a shell function */
41
42/* values for typecmd_impl's third parameter */
43enum {
44	TYPECMD_SMALLV,		/* command -v */
45	TYPECMD_BIGV,		/* command -V */
46	TYPECMD_TYPE		/* type */
47};
48
49union node;
50struct cmdentry {
51	int cmdtype;
52	union param {
53		int index;
54		struct funcdef *func;
55	} u;
56	int special;
57};
58
59
60/* action to find_command() */
61#define DO_ERR		0x01	/* prints errors */
62#define DO_NOFUNC	0x02	/* don't return shell functions, for command */
63
64extern const char *pathopt;	/* set by padvance */
65extern int exerrno;		/* last exec error */
66
67void shellexec(char **, char **, const char *, int) __dead2;
68char *padvance(const char **, const char *);
69void find_command(const char *, struct cmdentry *, int, const char *);
70int find_builtin(const char *, int *);
71void hashcd(void);
72void changepath(const char *);
73void defun(const char *, union node *);
74int unsetfunc(const char *);
75int isfunc(const char *);
76int typecmd_impl(int, char **, int, const char *);
77void clearcmdentry(void);
78