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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)eval.h 8.2 (Berkeley) 5/4/95 33 * $FreeBSD$ 34 */ 35 36 extern char *commandname; /* currently executing command */ 37 extern int exitstatus; /* exit status of last command */ 38 extern int oexitstatus; /* saved exit status */ 39 extern struct arglist *cmdenviron; /* environment for builtin command */ 40 41 42 struct backcmd { /* result of evalbackcmd */ 43 int fd; /* file descriptor to read from */ 44 char *buf; /* buffer */ 45 int nleft; /* number of chars in buffer */ 46 struct job *jp; /* job structure for command */ 47 }; 48 49 void reseteval(void); 50 51 /* flags in argument to evaltree/evalstring */ 52 #define EV_EXIT 01 /* exit after evaluating tree */ 53 #define EV_TESTED 02 /* exit status is checked; ignore -e flag */ 54 #define EV_BACKCMD 04 /* command executing within back quotes */ 55 56 void evalstring(const char *, int); 57 union node; /* BLETCH for ansi C */ 58 void evaltree(union node *, int); 59 void evalbackcmd(union node *, struct backcmd *); 60 61 /* in_function returns nonzero if we are currently evaluating a function */ 62 #define in_function() funcnest 63 extern int funcnest; 64 extern int evalskip; 65 extern int skipcount; 66 67 /* reasons for skipping commands (see comment on breakcmd routine) */ 68 #define SKIPBREAK 1 69 #define SKIPCONT 2 70 #define SKIPRETURN 3 71