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- /****************************************************************************
- *
- * $Source: /unixb/home/unixlib/source/unixlib37/src/clib/h/RCS/dirent,v $
- * $Date: 1996/11/06 22:01:41 $
- * $Revision: 1.3 $
- * $State: Rel $
- * $Author: unixlib $
- *
- * $Log: dirent,v $
- * Revision 1.3 1996/11/06 22:01:41 unixlib
- * Yet more changes by NB, PB and SC.
- *
- * Revision 1.2 1996/10/30 21:58:58 unixlib
- * Massive changes made by Nick Burret and Peter Burwood.
- *
- * Revision 1.1 1996/04/19 21:02:57 simon
- * Initial revision
- *
- ***************************************************************************/
-
- /* POSIX Standard 5.1.2: Directory Operations <dirent.h> */
-
- #ifndef __DIRENT_H
- #define __DIRENT_H
-
- #ifndef __STDDEF_H
- #include <stddef.h>
- #endif
- #ifndef __UNIXLIB_TYPES_H
- #include <unixlib/types.h>
- #endif
- #ifndef __SYS_PARAM_H
- #include <sys/param.h>
- #endif
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /* MAXNAMELEN is the BSD name for what POSIX calls NAME_MAX. */
-
- /* Don't assume ADFS filename restrictions.
- Keep in sync with <limits.h>, _POSIX_NAME_MAX. */
- #define MAXNAMLEN MAXPATHLEN
-
- /* This isn't really how ADFS stores files in a directory, but
- * since no I/O is permitted on directories anyway this doesn't
- * really matter. */
-
-
- struct dirent
- {
- __off_t d_off; /* offset of next disk directory entry */
- __ino_t d_fileno; /* file number of entry */
- size_t d_reclen; /* length of this record */
- size_t d_namlen; /* length of d_name */
- unsigned char d_type; /* file type, possibly unknown */
- char d_name[MAXNAMLEN]; /* name */
- };
-
- /* For backwards compatibility with BSD. */
- #define d_ino d_fileno
-
- /* BSD file types for d_type. */
- enum
- {
- DT_UNKNOWN = 0,
- DT_FIFO = 1,
- DT_CHR = 2,
- DT_DIR = 4,
- DT_BLK = 6,
- DT_REG = 8,
- DT_LNK = 10,
- DT_SOCK = 12
- };
-
- /* BSD macros to convert between stat structure types and
- directory types. */
- #define IFTODT(mode) (((mode) & 0170000) >> 12)
- #define DTTOIF(dirtype) ((dirtype) << 12)
-
-
- #define DIRSIZ(dp) (((sizeof(struct dirent) - \
- MAXNAMLEN + ((dp)->d_namlen + 1)) + \
- (sizeof(int) - 1)) & ~(sizeof(int) - 1))
-
- typedef struct
- {
- int dd_fd; /* file descriptor (unused) */
- char *dd_name; /* directory name */
- size_t dd_loc; /* buffer offset */
- size_t dd_size; /* amount of valid data in buffer */
- size_t dd_bsize; /* buffer size */
- size_t dd_off; /* directory offset */
- int dd_off2; /* offset of next read */
- char *dd_buf; /* directory data buffer */
- } __DIR;
-
- #define DIR __DIR
-
- /* Open a directory stream on name. Return a dir stream on
- the directory, or NULL if it could not be opened. */
- extern DIR *opendir (const char *name);
-
- /* Read a directory entry from dirp.
- Return a pointer to a struct dirent describing the entry,
- or NULL for EOF or error. The storage returned may be overwritten
- by a later readdir call on the same DIR stream. */
- extern struct dirent *readdir (DIR *dirp);
-
- /* Return the current position of dirp. */
- extern long telldir (DIR *dirp);
-
- /* Seek to position pos on dirp. */
- extern void seekdir (DIR *dirp, __off_t pos);
-
- /* Rewind DIRP to the beginning of the directory. */
- #define rewinddir(d) (seekdir((d),(long)0),0)
- extern void (rewinddir)(DIR *dirp);
-
- /* Close the directory stream dirp. Return 0 if successful,
- -1 if not. */
- extern int closedir (DIR *dirp);
-
- /* Function to compare two `struct dirent's alphabetically. */
- extern int alphasort (const ptr_t, const ptr_t);
-
- #if 0
- /* Scan the directory dir, calling 'select' on each directory entry.
- Entries for which 'select' returns nonzero are individually malloc'd,
- sorted using qsort with 'cmp', and collected in a malloc'd array in
- *namelist. Returns the number of entries selected, or -1 on error. */
- extern int scandir (const char *dir,
- struct dirent ***namelist,
- int (*select) (struct dirent *),
- int (*cmp) (const ptr_t, const ptr_t));
-
- /* Read directory entries from fd into buf, reading at most nbytes.
- Reading starts at offset *basep, and *basep is updated with the new
- position after reading. Returns the number of bytes read; zero when at
- end of directory; or -1 for errors. */
- extern ssize_t getdirentries (int fd, char *buf,
- size_t nbytes, __off_t *basep);
- #endif
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif
-