1/*-
 2 * SPDX-License-Identifier: BSD-3-Clause
 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
35/* values of cmdtype */
36#define CMDUNKNOWN -1		/* no entry in table for command */
37#define CMDNORMAL 0		/* command is an executable program */
38#define CMDBUILTIN 1		/* command is a shell builtin */
39#define CMDFUNCTION 2		/* command is a shell function */
40
41/* values for typecmd_impl's third parameter */
42enum {
43	TYPECMD_SMALLV,		/* command -v */
44	TYPECMD_BIGV,		/* command -V */
45	TYPECMD_TYPE		/* type */
46};
47
48union node;
49struct cmdentry {
50	int cmdtype;
51	union param {
52		int index;
53		struct funcdef *func;
54	} u;
55	int special;
56	const char *cmdname;
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
64void shellexec(char **, char **, const char *, int) __dead2;
65char *padvance(const char **, const char **, const char *);
66void find_command(const char *, struct cmdentry *, int, const char *);
67int find_builtin(const char *, int *);
68void hashcd(void);
69void changepath(const char *);
70void defun(const char *, union node *);
71int unsetfunc(const char *);
72int isfunc(const char *);
73int typecmd_impl(int, char **, int, const char *);
74void clearcmdentry(void);
75const void *itercmd(const void *, struct cmdentry *);