Subversion Repositories planix.SVN

/*
        <dirent.h> -- definitions for SVR3 directory access routines

        last edit:      25-Apr-1987     D A Gwyn

        Prerequisite:   <sys/types.h>
*/

#ifndef _PAX_DIRENT_H
#define _PAX_DIRENT_H

#include "config.h"
#ifdef USG
#define UFS
#else
#ifdef BSD
#define BFS
#endif
#endif

struct dirent {                         /* data from getdents()/readdir() */
    long                d_ino;          /* inode number of entry */
    off_t               d_off;          /* offset of disk directory entry */
    unsigned short      d_reclen;       /* length of this record */
    char                d_name[1];      /* name of file (non-POSIX) */
};

typedef struct {
    int         dd_fd;                  /* file descriptor */
    int         dd_loc;                 /* offset in block */
    int         dd_size;                /* amount of valid data */
    char        *dd_buf;                /* -> directory block */
} DIR;                                  /* stream data from opendir() */


/* 
 * The following nonportable ugliness could have been avoided by defining
 * DIRENTSIZ and DIRENTBASESIZ to also have (struct dirent *) arguments. 
 */
#define DIRENTBASESIZ           (((struct dirent *)0)->d_name \
                                - (char *)&((struct dirent *)0)->d_ino)
#define DIRENTSIZ( namlen )     ((DIRENTBASESIZ + sizeof(long) + (namlen)) \
                                / sizeof(long) * sizeof(long))

#define MAXNAMLEN 512                   /* maximum filename length */

#ifndef NAME_MAX
#define NAME_MAX (MAXNAMLEN - 1)        /* DAG -- added for POSIX */
#endif

#define DIRBUF   8192                   /* buffer size for fs-indep. dirs */
                /* must in general be larger than the filesystem buffer size */

extern DIR              *opendir();
extern struct dirent    *readdir();
extern OFFSET           telldir();
extern void             seekdir();
extern int              closedir();

#endif /* _PAX_DIRENT_H */