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*                                                                      *
*               This software is part of the ast package               *
*                  Copyright (c) 1982-2005 AT&T Corp.                  *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                            by AT&T Corp.                             *
*                                                                      *
*                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
 *    UNIX shell
 *    David Korn

#include    <ast.h>
#include    <sfio.h>

#ifndef IOBSIZE
#   define  IOBSIZE     SF_BUFSIZE
#endif /* IOBSIZE */
#define IOMAXTRY  20

#ifndef SF_CLOSING
#define SF_CLOSING      SF_CLOSE

/* used for output of shell errors */
#define ERRIO           2

#define IOREAD          001
#define IOWRITE         002
#define IODUP           004
#define IOSEEK          010
#define IONOSEEK  020
#define IOTTY           040
#define IOCLEX          0100

#define IOSUBSHELL      0x8000      /* must be larger than any file descriptor */

 * The remainder of this file is only used when compiled with shell


#ifndef ARG_RAW
    struct ionod;
#endif /* !ARG_RAW */

#define sh_inuse(f2)    (sh.fdptrs[f2])

extern int  sh_iocheckfd(int);
extern void       sh_ioinit(void);
extern int  sh_iomovefd(int);
extern int  sh_iorenumber(int,int);
extern void       sh_pclose(int[]);
extern void       sh_iorestore(int,int);
#if defined(__EXPORT__) && defined(_BLD_DLL) && defined(_BLD_shell) 
extern Sfio_t     *sh_iostream(int);
struct ionod;
extern int  sh_redirect(struct ionod*,int);
extern void       sh_iosave(int,int);
extern void       sh_iounsave(void);
extern int  sh_chkopen(const char*);
extern int  sh_ioaccess(int,int);
extern int  sh_devtofd(const char*);

/* the following are readonly */
extern const char e_pexists[];
extern const char e_query[];
extern const char e_history[];
extern const char e_argtype[];
extern const char e_create[];
extern const char e_tmpcreate[];
extern const char e_exists[];
extern const char e_file[];
extern const char e_formspec[];
extern const char e_badregexp[];
extern const char e_open[];
extern const char e_toomany[];
extern const char e_pipe[];
extern const char e_unknown[];
extern const char e_devnull[];
extern const char e_profile[];
extern const char e_sysprofile[];
extern const char e_stdprompt[];
extern const char e_supprompt[];
extern const char e_ambiguous[];
#endif /* KSHELL */

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