1 /* $NetBSD: eval.h,v 1.13 2002/11/24 22:35:39 christos 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 * @(#)eval.h 8.2 (Berkeley) 5/4/95 39 */ 40 41 extern char *commandname; /* currently executing command */ 42 extern int exitstatus; /* exit status of last command */ 43 extern int back_exitstatus; /* exit status of backquoted command */ 44 extern struct strlist *cmdenviron; /* environment for builtin command */ 45 46 47 struct backcmd { /* result of evalbackcmd */ 48 int fd; /* file descriptor to read from */ 49 char *buf; /* buffer */ 50 int nleft; /* number of chars in buffer */ 51 struct job *jp; /* job structure for command */ 52 }; 53 54 void evalstring(char *, int); 55 union node; /* BLETCH for ansi C */ 56 void evaltree(union node *, int); 57 void evalbackcmd(union node *, struct backcmd *); 58 59 /* in_function returns nonzero if we are currently evaluating a function */ 60 #define in_function() funcnest 61 extern int funcnest; 62 extern int evalskip; 63 64 /* reasons for skipping commands (see comment on breakcmd routine) */ 65 #define SKIPBREAK 1 66 #define SKIPCONT 2 67 #define SKIPFUNC 3 68 #define SKIPFILE 4 69