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/* $NetBSD: eval.h,v 1.22 2018/12/03 06:43:19 kre Exp $ */
/*-
* 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.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)eval.h 8.2 (Berkeley) 5/4/95
*/
extern const char *commandname; /* currently executing command */
extern int exitstatus; /* exit status of last command */
extern int back_exitstatus; /* exit status of backquoted 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 */
};
void evalstring(char *, int);
union node; /* BLETCH for ansi C */
void evaltree(union node *, int);
void evalbackcmd(union node *, struct backcmd *);
const char *syspath(void);
/* in_function returns nonzero if we are currently evaluating a function */
int in_function(void); /* return non-zero, if evaluating a function */
/* reasons for skipping commands (see comment on breakcmd routine) */
enum skipstate {
SKIPNONE = 0, /* not skipping */
SKIPBREAK, /* break */
SKIPCONT, /* continue */
SKIPFUNC, /* return in a function */
SKIPFILE /* return in a dot command */
};
struct skipsave {
enum skipstate state; /* skipping or not */
int count; /* when break or continue, how many */
};
enum skipstate current_skipstate(void);
void save_skipstate(struct skipsave *);
void restore_skipstate(const struct skipsave *);
void stop_skipping(void); /* reset internal skipping state to SKIPNONE */
/*
* Only for use by reset() in init.c!
*/
void reset_eval(void);
/* flags in argument to evaltree */
#define EV_EXIT 0x01 /* exit after evaluating tree */
#define EV_TESTED 0x02 /* exit status is checked; ignore -e flag */
#define EV_BACKCMD 0x04 /* command executing within back quotes */
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