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 * $Id$ 38 */ 39 40 extern char *commandname; /* currently executing command */ 41 extern int exitstatus; /* exit status of last command */ 42 extern struct strlist *cmdenviron; /* environment for builtin command */ 43 44 45 struct backcmd { /* result of evalbackcmd */ 46 int fd; /* file descriptor to read from */ 47 char *buf; /* buffer */ 48 int nleft; /* number of chars in buffer */ 49 struct job *jp; /* job structure for command */ 50 }; 51 52 int evalcmd __P((int, char **)); 53 void evalstring __P((char *)); 54 union node; /* BLETCH for ansi C */ 55 void evaltree __P((union node *, int)); 56 void evalbackcmd __P((union node *, struct backcmd *)); 57 int bltincmd __P((int, char **)); 58 int breakcmd __P((int, char **)); 59 int returncmd __P((int, char **)); 60 int falsecmd __P((int, char **)); 61 int truecmd __P((int, char **)); 62 int execcmd __P((int, char **)); 63 64 /* in_function returns nonzero if we are currently evaluating a function */ 65 #define in_function() funcnest 66 extern int funcnest; 67 extern int evalskip; 68 69 /* reasons for skipping commands (see comment on breakcmd routine) */ 70 #define SKIPBREAK 1 71 #define SKIPCONT 2 72 #define SKIPFUNC 3 73 #define SKIPFILE 4 74