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/*  $NetBSD: exec.h,v 1.17 2000/05/22 10:18:47 elric Exp $  */

/*-
 * Copyright (c) 1991, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the University of
 *  California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *  @(#)exec.h  8.3 (Berkeley) 6/8/95
 */

/* values of cmdtype */
#define CMDUNKNOWN -1       /* no entry in table for command */
#define CMDNORMAL 0     /* command is an executable program */
#define CMDBUILTIN 1        /* command is a shell builtin */
#define CMDFUNCTION 2       /* command is a shell function */


struct cmdentry {
    int cmdtype;
    union param {
        int index;
        union node *func;
    } u;
};


#define DO_ERR  1       /* find_command prints errors */
#define DO_ABS  2       /* find_command checks absolute paths */
#define DO_NOFUN    4   /* find_command ignores functions */
#define DO_BRUTE    8   /* find_command ignores hash table */

extern const char *pathopt; /* set by padvance */
extern int exerrno;     /* last exec error */

void shellexec (char **, char **, const char *, int)
    __attribute__((noreturn));
char *padvance (const char **, const char *);
int hashcmd (int, char **);
void find_command (char *, struct cmdentry *, int, const char *);
int find_builtin (char *);
void hashcd (void);
void changepath (const char *);
void deletefuncs (void);
void getcmdentry (char *, struct cmdentry *);
void addcmdentry (char *, struct cmdentry *);
void defun (char *, union node *);
int unsetfunc (char *);
int typecmd (int, char **);
int commandcmd (int, char **);