add EX__MAX to represent top value listed

[unix-history] / usr / src / include / dirent.h

/*-
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)dirent.h	5.14 (Berkeley) %G%
 */

#ifndef _DIRENT_
#define _DIRENT_

/*
 * A directory entry has a struct direct at the front of it, containing its
 * inode number, the length of the entry, and the length of the name
 * contained in the entry.  These are followed by the name padded to a 4
 * byte boundary with null bytes.  All names are guaranteed null terminated.
 * The maximum length of a name in a directory is MAXNAMLEN.
 */

struct dirent {
	u_long	d_fileno;		/* file number of entry */
	u_short	d_reclen;		/* length of this record */
	u_short	d_namlen;		/* length of string in d_name */
#ifdef _POSIX_SOURCE
	char	d_name[255 + 1];	/* name must be no longer than this */
#else
#define	MAXNAMLEN	255
	char	d_name[MAXNAMLEN + 1];	/* name must be no longer than this */
#endif
};

#ifdef _POSIX_SOURCE
typedef void *	DIR;
#else

#define	d_ino		d_fileno	/* backward compatibility */

/* definitions for library routines operating on directories. */
#define	DIRBLKSIZ	1024

/* structure describing an open directory. */
typedef struct _dirdesc {
	int	dd_fd;		/* file descriptor associated with directory */
	long	dd_loc;		/* offset in current buffer */
	long	dd_size;	/* amount of data returned by getdirentries */
	char	*dd_buf;	/* data buffer */
	int	dd_len;		/* size of data buffer */
	long	dd_seek;	/* magic cookie returned by getdirentries */
} DIR;

#define	dirfd(dirp)	((dirp)->dd_fd)

#ifndef NULL
#define	NULL	0
#endif

#endif /* _POSIX_SOURCE */

#if __STDC__ || c_plusplus
extern DIR *opendir(const char *);
extern struct dirent *readdir(DIR *);
extern void rewinddir(DIR *);
extern int closedir(DIR *);
#ifndef _POSIX_SOURCE
extern long telldir(const DIR *);
extern void seekdir(DIR *, long);
extern int scandir(const char *, struct dirent ***,
    int (*)(struct dirent *), int (*)(void *, void *));
extern int alphasort(const void *, const void *);
#endif
#else
extern DIR *opendir();
extern struct dirent *readdir();
extern void rewinddir();
extern int closedir();
#ifndef _POSIX_SOURCE
extern long telldir();
extern void seekdir();
extern int scandir();
extern int alphasort();
#endif
#endif
#endif /* _DIRENT_ */