bin/sh/eval.h

1.14       agc /*	$NetBSD: eval.h,v 1.14 2003/08/07 09:05:31 agc Exp $	*/
 1.7       cgd
 1.1       cgd /*-
 1.5       jtc  * Copyright (c) 1991, 1993
 1.5       jtc  *	The Regents of the University of California.  All rights reserved.
 1.1       cgd  *
 1.1       cgd  * This code is derived from software contributed to Berkeley by
 1.1       cgd  * Kenneth Almquist.
 1.1       cgd  *
 1.1       cgd  * Redistribution and use in source and binary forms, with or without
 1.1       cgd  * modification, are permitted provided that the following conditions
 1.1       cgd  * are met:
 1.1       cgd  * 1. Redistributions of source code must retain the above copyright
 1.1       cgd  *    notice, this list of conditions and the following disclaimer.
 1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
 1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
 1.1       cgd  *    documentation and/or other materials provided with the distribution.
1.14       agc  * 3. Neither the name of the University nor the names of its contributors
 1.1       cgd  *    may be used to endorse or promote products derived from this software
 1.1       cgd  *    without specific prior written permission.
 1.1       cgd  *
 1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 1.1       cgd  * SUCH DAMAGE.
 1.1       cgd  *
 1.8  christos  *	@(#)eval.h	8.2 (Berkeley) 5/4/95
 1.1       cgd  */
 1.1       cgd
 1.1       cgd extern char *commandname;	/* currently executing command */
 1.1       cgd extern int exitstatus;		/* exit status of last command */
1.13  christos extern int back_exitstatus;	/* exit status of backquoted command */
 1.1       cgd extern struct strlist *cmdenviron;  /* environment for builtin command */
 1.1       cgd
 1.1       cgd
 1.1       cgd struct backcmd {		/* result of evalbackcmd */
 1.1       cgd 	int fd;			/* file descriptor to read from */
 1.1       cgd 	char *buf;		/* buffer */
 1.1       cgd 	int nleft;		/* number of chars in buffer */
 1.1       cgd 	struct job *jp;		/* job structure for command */
 1.1       cgd };
 1.1       cgd
1.13  christos void evalstring(char *, int);
 1.1       cgd union node;	/* BLETCH for ansi C */
1.13  christos void evaltree(union node *, int);
1.13  christos void evalbackcmd(union node *, struct backcmd *);
 1.1       cgd
 1.1       cgd /* in_function returns nonzero if we are currently evaluating a function */
 1.1       cgd #define in_function()	funcnest
 1.1       cgd extern int funcnest;
 1.9  christos extern int evalskip;
 1.9  christos
 1.9  christos /* reasons for skipping commands (see comment on breakcmd routine) */
 1.9  christos #define SKIPBREAK	1
 1.9  christos #define SKIPCONT	2
 1.9  christos #define SKIPFUNC	3
 1.9  christos #define SKIPFILE	4