dir.h

早期freebsd实现

/*
 * @(#) dir.h 1.4 87/11/06   Public Domain.
 *
 *  A public domain implementation of BSD directory routines for
 *  MS-DOS.  Written by Michael Rendell ({uunet,utai}michael@garfield),
 *  August 1987
 *
 *  Enhanced and ported to OS/2 by Kai Uwe Rommel; added scandir() prototype
 *  December 1989, February 1990
 *  Change of MAXPATHLEN for HPFS, October 1990
 */


#define MAXNAMLEN  256
#define MAXPATHLEN 256

#define A_RONLY    0x01
#define A_HIDDEN   0x02
#define A_SYSTEM   0x04
#define A_LABEL    0x08
#define A_DIR      0x10
#define A_ARCHIVE  0x20


struct direct
{
  ino_t    d_ino;                   /* a bit of a farce */
  int      d_reclen;                /* more farce */
  int      d_namlen;                /* length of d_name */
  char     d_name[MAXNAMLEN + 1];   /* null terminated */
  /* nonstandard fields */
  long     d_size;                  /* size in bytes */
  unsigned d_mode;                  /* DOS or OS/2 file attributes */
  unsigned d_time;
  unsigned d_date;
};

/* The fields d_size and d_mode are extensions by me (Kai Uwe Rommel).
 * The find_first and find_next calls deliver this data without any extra cost.
 * If this data is needed, these fields save a lot of extra calls to stat()
 * (each stat() again performs a find_first call !).
 */

struct _dircontents
{
  char *_d_entry;
  long _d_size;
  unsigned _d_mode, _d_time, _d_date;
  struct _dircontents *_d_next;
};

typedef struct _dirdesc
{
  int  dd_id;                   /* uniquely identify each open directory */
  long dd_loc;                  /* where we are in directory entry is this */
  struct _dircontents *dd_contents;   /* pointer to contents of dir */
  struct _dircontents *dd_cp;         /* pointer to current position */
}
DIR;


extern int attributes;

extern DIR *opendir(char *);
extern struct direct *readdir(DIR *);
extern void seekdir(DIR *, long);
extern long telldir(DIR *);
extern void closedir(DIR *);
#define rewinddir(dirp) seekdir(dirp, 0L)

extern int scandir(char *, struct direct ***,
                   int (*)(struct direct *),
                   int (*)(struct direct *, struct direct *));

extern int getfmode(char *);
extern int setfmode(char *, unsigned);