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eval.h revision 1.4 
      1 /*-
      2  * Copyright (c) 1991 The Regents of the University of California.
      3  * 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  *	from: @(#)eval.h	5.2 (Berkeley) 4/12/91
     37  *	$Id: eval.h,v 1.4 1993/08/01 18:58:31 mycroft Exp $
     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 
     53 #ifdef __STDC__
     54 void evalstring(char *);
     55 union node;	/* BLETCH for ansi C */
     56 void evaltree(union node *, int);
     57 void evalbackcmd(union node *, struct backcmd *);
     58 #else
     59 void evalstring();
     60 void evaltree();
     61 void evalbackcmd();
     62 #endif
     63 
     64 /* in_function returns nonzero if we are currently evaluating a function */
     65 #define in_function()	funcnest
     66 extern int funcnest;
     67