/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)eval.h	8.1 (Berkeley) 05/31/93
 */

extern char *commandname;	/* currently executing command */
extern int exitstatus;		/* exit status of last command */
extern struct strlist *cmdenviron;  /* environment for builtin command */


struct backcmd {		/* result of evalbackcmd */
	int fd;			/* file descriptor to read from */
	char *buf;		/* buffer */
	int nleft;		/* number of chars in buffer */
	struct job *jp;		/* job structure for command */
};


#ifdef __STDC__
void evalstring(char *);
union node;	/* BLETCH for ansi C */
void evaltree(union node *, int);
void evalbackcmd(union node *, struct backcmd *);
#else
void evalstring();
void evaltree();
void evalbackcmd();
#endif

/* in_function returns nonzero if we are currently evaluating a function */
#define in_function()	funcnest
extern int funcnest;