1 /* $NetBSD: eval.h,v 1.15 2008/02/15 17:26:06 matt 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)eval.h 8.2 (Berkeley) 5/4/95 35 */ 36 37 extern const char *commandname; /* currently executing command */ 38 extern int exitstatus; /* exit status of last command */ 39 extern int back_exitstatus; /* exit status of backquoted command */ 40 extern struct strlist *cmdenviron; /* environment for builtin command */ 41 42 43 struct backcmd { /* result of evalbackcmd */ 44 int fd; /* file descriptor to read from */ 45 char *buf; /* buffer */ 46 int nleft; /* number of chars in buffer */ 47 struct job *jp; /* job structure for command */ 48 }; 49 50 void evalstring(char *, int); 51 union node; /* BLETCH for ansi C */ 52 void evaltree(union node *, int); 53 void evalbackcmd(union node *, struct backcmd *); 54 55 /* in_function returns nonzero if we are currently evaluating a function */ 56 #define in_function() funcnest 57 extern int funcnest; 58 extern int evalskip; 59 60 /* reasons for skipping commands (see comment on breakcmd routine) */ 61 #define SKIPBREAK 1 62 #define SKIPCONT 2 63 #define SKIPFUNC 3 64 #define SKIPFILE 4 65