/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1982-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                  David Korn <dgk@research.att.com>                   *
*                                                                      *
***********************************************************************/
#pragma prototyped
#ifndef SH_SIGBITS
/*
 *	UNIX shell
 *	S. R. Bourne
 *	Rewritten by David Korn
 *
 */

#include	<sig.h>
#include	<setjmp.h>
#include	<error.h>
#include	<sfio.h>
#include	"FEATURE/setjmp"
#include	"FEATURE/sigfeatures"

#ifndef SIGWINCH
#   ifdef SIGWIND
#	define SIGWINCH	SIGWIND
#   else
#	ifdef SIGWINDOW
#	    define SIGWINCH	SIGWINDOW
#	endif
#   endif
#endif

typedef void (*SH_SIGTYPE)(int,void(*)(int));

#define SH_FORKLIM		16	/* fork timeout interval */

#define SH_TRAP			0200	/* bit for internal traps */
#define SH_ERRTRAP		0	/* trap for non-zero exit status */
#define SH_KEYTRAP		1	/* trap for keyboard event */
#define SH_DEBUGTRAP		4	/* must be last internal trap */

#define SH_SIGBITS		8
#define SH_SIGFAULT		1	/* signal handler is sh_fault */
#define SH_SIGOFF		2	/* signal handler is SIG_IGN */
#define SH_SIGSET		4	/* pending signal */
#define SH_SIGTRAP		010	/* pending trap */
#define SH_SIGDONE		020	/* default is exit */
#define SH_SIGIGNORE		040	/* default is ingore signal */
#define SH_SIGINTERACTIVE	0100	/* handle interactive specially */
#define SH_SIGTSTP		0200	/* tstp signal received */
#define SH_SIGALRM		0200	/* timer alarm received */
#define SH_SIGTERM		SH_SIGOFF /* term signal received */

/*
 * These are longjmp values
 */

#define SH_JMPDOT	2
#define SH_JMPEVAL	3
#define SH_JMPTRAP	4
#define SH_JMPIO	5
#define SH_JMPCMD	6
#define SH_JMPFUN	7
#define SH_JMPERRFN	8
#define SH_JMPSUB	9
#define SH_JMPERREXIT	10
#define SH_JMPEXIT	11
#define SH_JMPSCRIPT	12

struct openlist
{
	Sfio_t	*strm;
	struct openlist *next;
};

struct checkpt
{
	sigjmp_buf	buff;
	sigjmp_buf	*prev;
	int		topfd;
	int		mode;
	struct openlist	*olist;
#if (ERROR_VERSION >= 20030214L)
	Error_context_t err;
#else
	struct errorcontext err;
#endif
};

#define sh_pushcontext(bp,n)	( (bp)->mode=(n) , (bp)->olist=0,  \
				  (bp)->topfd=sh.topfd, (bp)->prev=sh.jmplist, \
				  (bp)->err = *ERROR_CONTEXT_BASE, \
					sh.jmplist = (sigjmp_buf*)(&(bp)->buff) \
				)
#define sh_popcontext(bp)	(sh.jmplist=(bp)->prev, errorpop(&((bp)->err)))

extern void 	sh_fault(int);
extern void 	sh_done(int);
extern void 	sh_chktrap(void);
extern void 	sh_sigclear(int);
extern void 	sh_sigdone(void);
extern void	sh_siginit(void);
extern void 	sh_sigtrap(int);
extern void 	sh_sigreset(int);
extern void 	sh_timetraps(void);
extern void 	*sh_timeradd(unsigned long,int ,void (*)(void*),void*);
extern void	timerdel(void*);

extern const char e_alarm[];

#endif /* !SH_SIGBITS */