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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 path handling interface
 *    Written by David Korn
 *    These are the definitions for the lexical analyzer

#include    "FEATURE/options"
#include    <nval.h>

#if !defined(SHOPT_SPAWN)
#   if _UWIN || _use_spawnveg || !_lib_fork
#     define  SHOPT_SPAWN  1
#   endif
#endif /* !SHOPT_SPAWN */

#define PATH_PATH       0001
#define PATH_FPATH            0002
#define PATH_CDPATH           0004
#define PATH_BFPATH           0010
#define PATH_SKIP       0020
#define PATH_BUILTIN_LIB      0040
#define PATH_BUILTIN_SH       0100

#define PATH_OFFSET     2           /* path offset for path_join */
#define MAXDEPTH  (sizeof(char*)==2?64:4096) /* maximum recursion depth*/

 * path component structure for path searching
typedef struct pathcomp
      struct pathcomp *next;
      int         refcount;
      dev_t       dev;
      ino_t       ino;
      char        *name;
      char        *lib;
      void        *bltin_lib;
      unsigned short    len;
      unsigned short    flags;
      Shell_t           *shp;
} Pathcomp_t;

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

/* pathname handling routines */
extern void       path_newdir(Pathcomp_t*);
extern Pathcomp_t *path_dirfind(Pathcomp_t*,const char*,int);
extern Pathcomp_t *path_unsetfpath(Pathcomp_t*);
extern Pathcomp_t *path_addpath(Pathcomp_t*,const char*,int);
extern Pathcomp_t *path_dup(Pathcomp_t*);
extern void       path_delete(Pathcomp_t*);
extern void             path_alias(Namval_t*,Pathcomp_t*);
extern Pathcomp_t       *path_absolute(const char*, Pathcomp_t*);
extern char             *path_basename(const char*);
extern char             *path_fullname(const char*);
extern int        path_expand(const char*, struct argnod**);
extern void             path_exec(const char*,char*[],struct argnod*);
extern pid_t            path_spawn(const char*,char*[],char*[],Pathcomp_t*,int);
#if defined(__EXPORT__) && defined(_BLD_DLL) && defined(_BLD_shell)
#   define extern __EXPORT__
extern int        path_open(const char*,Pathcomp_t*);
extern Pathcomp_t       *path_get(const char*);
#undef extern
extern char             *path_pwd(int);
extern Pathcomp_t *path_nextcomp(Pathcomp_t*,const char*,Pathcomp_t*);
extern int        path_search(const char*,Pathcomp_t*,int);
extern char       *path_relative(const char*);
extern int        path_complete(const char*, const char*,struct argnod**);
    extern int          path_generate(struct argnod*,struct argnod**);
#endif /* SHOPT_BRACEPAT */

/* constant strings needed for whence */
extern const char e_timeformat[];
extern const char e_badtformat[];
extern const char e_dot[];
extern const char e_pfsh[];
extern const char e_pwd[];
extern const char e_logout[];
extern const char e_alphanum[];
extern const char e_mailmsg[];
extern const char e_suidprofile[];
extern const char e_sysprofile[];
extern const char e_traceprompt[];
extern const char e_crondir[];
    extern const char   e_suidexec[];
#endif /* SHOPT_SUID_EXEC */
extern const char is_alias[];
extern const char is_builtin[];
extern const char is_builtver[];
extern const char is_reserved[];
extern const char is_talias[];
extern const char is_xalias[];
extern const char is_function[];
extern const char is_ufunction[];
    extern const char e_prohibited[];
#endif /* SHELLMAGIC */

#   include "FEATURE/acct"
#   ifdef   _sys_acct
      extern void sh_accinit(void);
      extern void sh_accbegin(const char*);
      extern void sh_accend(void);
      extern void sh_accsusp(void);
#   else
#     undef SHOPT_ACCT
#   endif   /* _sys_acct */
#endif /* SHOPT_ACCT */

#endif /*! PATH_OFFSET */

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