1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kenneth Almquist. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)eval.h 8.2 (Berkeley) 5/4/95 37 * $FreeBSD: src/bin/sh/eval.h,v 1.15 2011/06/13 21:03:27 jilles Exp $ 38 */ 39 40 extern const char *commandname; /* currently executing command */ 41 extern int exitstatus; /* exit status of last command */ 42 extern int oexitstatus; /* saved exit status */ 43 extern struct strlist *cmdenviron; /* environment for builtin command */ 44 45 46 struct backcmd { /* result of evalbackcmd */ 47 int fd; /* file descriptor to read from */ 48 char *buf; /* buffer */ 49 int nleft; /* number of chars in buffer */ 50 struct job *jp; /* job structure for command */ 51 }; 52 53 /* flags in argument to evaltree/evalstring */ 54 #define EV_EXIT 01 /* exit after evaluating tree */ 55 #define EV_TESTED 02 /* exit status is checked; ignore -e flag */ 56 #define EV_BACKCMD 04 /* command executing within back quotes */ 57 58 void evalstring(char *, int); 59 union node; /* BLETCH for ansi C */ 60 void evaltree(union node *, int); 61 void evalbackcmd(union node *, struct backcmd *); 62 63 /* in_function returns nonzero if we are currently evaluating a function */ 64 #define in_function() funcnest 65 extern int funcnest; 66 extern int evalskip; 67 68 /* reasons for skipping commands (see comment on breakcmd routine) */ 69 #define SKIPBREAK 1 70 #define SKIPCONT 2 71 #define SKIPFUNC 3 72 #define SKIPFILE 4 73