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eval.h revision 1.1.1.2 
      1      1.1  cgd /*-
      2  1.1.1.2  jtc  * Copyright (c) 1991, 1993
      3  1.1.1.2  jtc  *	The Regents of the University of California.  All rights reserved.
      4      1.1  cgd  *
      5      1.1  cgd  * This code is derived from software contributed to Berkeley by
      6      1.1  cgd  * Kenneth Almquist.
      7      1.1  cgd  *
      8      1.1  cgd  * Redistribution and use in source and binary forms, with or without
      9      1.1  cgd  * modification, are permitted provided that the following conditions
     10      1.1  cgd  * are met:
     11      1.1  cgd  * 1. Redistributions of source code must retain the above copyright
     12      1.1  cgd  *    notice, this list of conditions and the following disclaimer.
     13      1.1  cgd  * 2. Redistributions in binary form must reproduce the above copyright
     14      1.1  cgd  *    notice, this list of conditions and the following disclaimer in the
     15      1.1  cgd  *    documentation and/or other materials provided with the distribution.
     16      1.1  cgd  * 3. All advertising materials mentioning features or use of this software
     17      1.1  cgd  *    must display the following acknowledgement:
     18      1.1  cgd  *	This product includes software developed by the University of
     19      1.1  cgd  *	California, Berkeley and its contributors.
     20      1.1  cgd  * 4. Neither the name of the University nor the names of its contributors
     21      1.1  cgd  *    may be used to endorse or promote products derived from this software
     22      1.1  cgd  *    without specific prior written permission.
     23      1.1  cgd  *
     24      1.1  cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25      1.1  cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26      1.1  cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27      1.1  cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28      1.1  cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29      1.1  cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30      1.1  cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31      1.1  cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32      1.1  cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33      1.1  cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34      1.1  cgd  * SUCH DAMAGE.
     35      1.1  cgd  *
     36  1.1.1.2  jtc  *	@(#)eval.h	8.1 (Berkeley) 5/31/93
     37      1.1  cgd  */
     38      1.1  cgd 
     39      1.1  cgd extern char *commandname;	/* currently executing command */
     40      1.1  cgd extern int exitstatus;		/* exit status of last command */
     41      1.1  cgd extern struct strlist *cmdenviron;  /* environment for builtin command */
     42      1.1  cgd 
     43      1.1  cgd 
     44      1.1  cgd struct backcmd {		/* result of evalbackcmd */
     45      1.1  cgd 	int fd;			/* file descriptor to read from */
     46      1.1  cgd 	char *buf;		/* buffer */
     47      1.1  cgd 	int nleft;		/* number of chars in buffer */
     48      1.1  cgd 	struct job *jp;		/* job structure for command */
     49      1.1  cgd };
     50      1.1  cgd 
     51      1.1  cgd 
     52      1.1  cgd #ifdef __STDC__
     53      1.1  cgd void evalstring(char *);
     54      1.1  cgd union node;	/* BLETCH for ansi C */
     55      1.1  cgd void evaltree(union node *, int);
     56      1.1  cgd void evalbackcmd(union node *, struct backcmd *);
     57      1.1  cgd #else
     58      1.1  cgd void evalstring();
     59      1.1  cgd void evaltree();
     60      1.1  cgd void evalbackcmd();
     61      1.1  cgd #endif
     62      1.1  cgd 
     63      1.1  cgd /* in_function returns nonzero if we are currently evaluating a function */
     64      1.1  cgd #define in_function()	funcnest
     65      1.1  cgd extern int funcnest;
     66