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exec.h revision 1.20 
      1 /*	$NetBSD: exec.h,v 1.20 2003/01/22 20:36:04 dsl 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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)exec.h	8.3 (Berkeley) 6/8/95
     39  */
     40 
     41 /* values of cmdtype */
     42 #define CMDUNKNOWN	-1	/* no entry in table for command */
     43 #define CMDNORMAL	0	/* command is an executable program */
     44 #define CMDFUNCTION	1	/* command is a shell function */
     45 #define CMDBUILTIN	2	/* command is a shell builtin */
     46 #define CMDSPLBLTIN	3	/* command is a special shell builtin */
     47 
     48 
     49 struct cmdentry {
     50 	int cmdtype;
     51 	union param {
     52 		int index;
     53 		int (*bltin)(int, char**);
     54 		union node *func;
     55 	} u;
     56 };
     57 
     58 
     59 /* action to find_command() */
     60 #define DO_ERR		0x01	/* prints errors */
     61 #define DO_ABS		0x02	/* checks absolute paths */
     62 #define DO_NOFUNC	0x04	/* don't return shell functions, for command */
     63 #define DO_ALTPATH	0x08	/* using alternate path */
     64 #define DO_ALTBLTIN	0x20	/* %builtin in alt. path */
     65 
     66 extern const char *pathopt;	/* set by padvance */
     67 
     68 void shellexec(char **, char **, const char *, int, int)
     69     __attribute__((__noreturn__));
     70 char *padvance(const char **, const char *);
     71 int hashcmd(int, char **);
     72 void find_command(char *, struct cmdentry *, int, const char *);
     73 int (*find_builtin(char *))(int, char **);
     74 int (*find_splbltin(char *))(int, char **);
     75 void hashcd(void);
     76 void changepath(const char *);
     77 void deletefuncs(void);
     78 void getcmdentry(char *, struct cmdentry *);
     79 void addcmdentry(char *, struct cmdentry *);
     80 void defun(char *, union node *);
     81 int unsetfunc(char *);
     82 int typecmd(int, char **);
     83 void hash_special_builtins(void);
     84