| 1 | /* $NetBSD: eval.h,v 1.14 2003/08/07 09:05:31 agc Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | *
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| 34 | * @(#)eval.h 8.2 (Berkeley) 5/4/95
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| 35 | */
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| 36 |
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| 37 | extern char *commandname; /* currently executing command */
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| 38 | extern int exitstatus; /* exit status of last command */
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| 39 | extern int back_exitstatus; /* exit status of backquoted command */
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| 40 | extern struct strlist *cmdenviron; /* environment for builtin command */
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| 41 |
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| 42 |
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| 43 | struct backcmd { /* result of evalbackcmd */
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| 44 | int fd; /* file descriptor to read from */
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| 45 | char *buf; /* buffer */
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| 46 | int nleft; /* number of chars in buffer */
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| 47 | struct job *jp; /* job structure for command */
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| 48 | };
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| 49 |
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| 50 | void evalstring(char *, int);
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| 51 | union node; /* BLETCH for ansi C */
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| 52 | void evaltree(union node *, int);
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| 53 | void evalbackcmd(union node *, struct backcmd *);
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| 54 |
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| 55 | /* in_function returns nonzero if we are currently evaluating a function */
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| 56 | #define in_function() funcnest
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| 57 | extern int funcnest;
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| 58 | extern int evalskip;
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| 59 |
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| 60 | /* reasons for skipping commands (see comment on breakcmd routine) */
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| 61 | #define SKIPBREAK 1
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| 62 | #define SKIPCONT 2
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| 63 | #define SKIPFUNC 3
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| 64 | #define SKIPFILE 4
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