exec.h revision dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0 
1/*	$NetBSD: exec.h,v 1.21 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 *	@(#)exec.h	8.3 (Berkeley) 6/8/95
35 */
36
37/* values of cmdtype */
38#define CMDUNKNOWN	-1	/* no entry in table for command */
39#define CMDNORMAL	0	/* command is an executable program */
40#define CMDFUNCTION	1	/* command is a shell function */
41#define CMDBUILTIN	2	/* command is a shell builtin */
42#define CMDSPLBLTIN	3	/* command is a special shell builtin */
43
44
45struct cmdentry {
46	int cmdtype;
47	union param {
48		int index;
49		int (*bltin)(int, char**);
50		union node *func;
51	} u;
52};
53
54
55/* action to find_command() */
56#define DO_ERR		0x01	/* prints errors */
57#define DO_ABS		0x02	/* checks absolute paths */
58#define DO_NOFUNC	0x04	/* don't return shell functions, for command */
59#define DO_ALTPATH	0x08	/* using alternate path */
60#define DO_ALTBLTIN	0x20	/* %builtin in alt. path */
61
62extern const char *pathopt;	/* set by padvance */
63
64void shellexec(char **, char **, const char *, int, int)
65    __attribute__((__noreturn__));
66char *padvance(const char **, const char *);
67int hashcmd(int, char **);
68void find_command(char *, struct cmdentry *, int, const char *);
69int (*find_builtin(char *))(int, char **);
70int (*find_splbltin(char *))(int, char **);
71void hashcd(void);
72void changepath(const char *);
73void deletefuncs(void);
74void getcmdentry(char *, struct cmdentry *);
75void addcmdentry(char *, struct cmdentry *);
76void defun(char *, union node *);
77int unsetfunc(char *);
78int typecmd(int, char **);
79void hash_special_builtins(void);
80