1 /*- 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)dirent.h 5.14 (Berkeley) 09/24/90 8 */ 9 10 #ifndef _DIRENT_ 11 #define _DIRENT_ 12 13 /* 14 * A directory entry has a struct direct at the front of it, containing its 15 * inode number, the length of the entry, and the length of the name 16 * contained in the entry. These are followed by the name padded to a 4 17 * byte boundary with null bytes. All names are guaranteed null terminated. 18 * The maximum length of a name in a directory is MAXNAMLEN. 19 */ 20 21 struct dirent { 22 u_long d_fileno; /* file number of entry */ 23 u_short d_reclen; /* length of this record */ 24 u_short d_namlen; /* length of string in d_name */ 25 #ifdef _POSIX_SOURCE 26 char d_name[255 + 1]; /* name must be no longer than this */ 27 #else 28 #define MAXNAMLEN 255 29 char d_name[MAXNAMLEN + 1]; /* name must be no longer than this */ 30 #endif 31 }; 32 33 #ifdef _POSIX_SOURCE 34 typedef void * DIR; 35 #else 36 37 #define d_ino d_fileno /* backward compatibility */ 38 39 /* definitions for library routines operating on directories. */ 40 #define DIRBLKSIZ 1024 41 42 /* structure describing an open directory. */ 43 typedef struct _dirdesc { 44 int dd_fd; /* file descriptor associated with directory */ 45 long dd_loc; /* offset in current buffer */ 46 long dd_size; /* amount of data returned by getdirentries */ 47 char *dd_buf; /* data buffer */ 48 int dd_len; /* size of data buffer */ 49 long dd_seek; /* magic cookie returned by getdirentries */ 50 } DIR; 51 52 #define dirfd(dirp) ((dirp)->dd_fd) 53 54 #ifndef NULL 55 #define NULL 0 56 #endif 57 58 #endif /* _POSIX_SOURCE */ 59 60 #if __STDC__ || c_plusplus 61 extern DIR *opendir(const char *); 62 extern struct dirent *readdir(DIR *); 63 extern void rewinddir(DIR *); 64 extern int closedir(DIR *); 65 #ifndef _POSIX_SOURCE 66 extern long telldir(const DIR *); 67 extern void seekdir(DIR *, long); 68 extern int scandir(const char *, struct dirent ***, 69 int (*)(struct dirent *), int (*)(void *, void *)); 70 extern int alphasort(const void *, const void *); 71 #endif 72 #else 73 extern DIR *opendir(); 74 extern struct dirent *readdir(); 75 extern void rewinddir(); 76 extern int closedir(); 77 #ifndef _POSIX_SOURCE 78 extern long telldir(); 79 extern void seekdir(); 80 extern int scandir(); 81 extern int alphasort(); 82 #endif 83 #endif 84 #endif /* _DIRENT_ */ 85