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#include "sh_cdefs.h"
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 CMDBUILTIN  1  /* command is a shell builtin */
41#define CMDFUNCTION 2  /* command is a shell function */
42#define CMDWEXEC    3  /* command is a registered builtin applet */
43
44/* values for typecmd_impl's third parameter */
45enum {
46  TYPECMD_SMALLV, /* command -v */
47  TYPECMD_BIGV,   /* command -V */
48  TYPECMD_TYPE    /* type */
49};
50
51union node;
52struct cmdentry {
53  int cmdtype;
54  union param {
55    int             index;
56    struct funcdef *func;
57  } u;
58  int         special;
59  const char *cmdname;
60};
61
62/* action to find_command() */
63#define DO_ERR    0x01 /* prints errors */
64#define DO_NOFUNC 0x02 /* don't return shell functions, for command */
65
66void        shellexec(char **, char **, const char *, int) __dead2;
67char       *padvance(const char **, const char **, const char *);
68void        find_command(const char *, struct cmdentry *, int, const char *);
69int         find_builtin(const char *, int *);
70void        hashcd(void);
71void        changepath(const char *);
72void        defun(const char *, union node *);
73int         unsetfunc(const char *);
74int         isfunc(const char *);
75int         typecmd_impl(int, char **, int, const char *);
76void        clearcmdentry(void);
77const void *itercmd(const void *, struct cmdentry *);