1bfbe947ab
* avoid unnecessary fork * allow executing builtins via command * executing a special builtin via command removes its special properties Obtained from: NetBSD (parts)
81 lines
3.0 KiB
C
81 lines
3.0 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)exec.h 8.3 (Berkeley) 6/8/95
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* $FreeBSD$
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*/
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/* values of cmdtype */
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#define CMDUNKNOWN -1 /* no entry in table for command */
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#define CMDNORMAL 0 /* command is an executable program */
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#define CMDBUILTIN 1 /* command is a shell builtin */
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#define CMDFUNCTION 2 /* command is a shell function */
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/* values for typecmd_impl's third parameter */
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enum {
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TYPECMD_SMALLV, /* command -v */
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TYPECMD_BIGV, /* command -V */
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TYPECMD_TYPE /* type */
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};
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union node;
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struct cmdentry {
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int cmdtype;
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union param {
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int index;
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struct funcdef *func;
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} u;
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int special;
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};
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/* action to find_command() */
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#define DO_ERR 0x01 /* prints errors */
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#define DO_NOFUNC 0x02 /* don't return shell functions, for command */
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extern const char *pathopt; /* set by padvance */
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extern int exerrno; /* last exec error */
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void shellexec(char **, char **, const char *, int) __dead2;
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char *padvance(const char **, const char *);
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int hashcmd(int, char **);
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void find_command(const char *, struct cmdentry *, int, const char *);
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int find_builtin(const char *, int *);
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void hashcd(void);
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void changepath(const char *);
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void deletefuncs(void);
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void addcmdentry(const char *, struct cmdentry *);
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void defun(const char *, union node *);
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int unsetfunc(const char *);
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int typecmd_impl(int, char **, int, const char *);
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int typecmd(int, char **);
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void clearcmdentry(int);
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