1 /*- 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)dirent.h 5.18 (Berkeley) 2/23/91 34 */ 35 36 #ifndef _DIRENT_H_ 37 #define _DIRENT_H_ 38 39 /* 40 * A directory entry has a struct dirent at the front of it, containing its 41 * inode number, the length of the entry, and the length of the name 42 * contained in the entry. These are followed by the name padded to a 4 43 * byte boundary with null bytes. All names are guaranteed null terminated. 44 * The maximum length of a name in a directory is MAXNAMLEN. 45 */ 46 47 struct dirent { 48 u_long d_fileno; /* file number of entry */ 49 u_short d_reclen; /* length of this record */ 50 u_short d_namlen; /* length of string in d_name */ 51 #ifdef _POSIX_SOURCE 52 char d_name[255 + 1]; /* name must be no longer than this */ 53 #else 54 #define MAXNAMLEN 255 55 char d_name[MAXNAMLEN + 1]; /* name must be no longer than this */ 56 #endif 57 }; 58 59 #ifdef _POSIX_SOURCE 60 typedef void * DIR; 61 #else 62 63 #define d_ino d_fileno /* backward compatibility */ 64 65 /* definitions for library routines operating on directories. */ 66 #define DIRBLKSIZ 1024 67 68 /* structure describing an open directory. */ 69 typedef struct _dirdesc { 70 int dd_fd; /* file descriptor associated with directory */ 71 long dd_loc; /* offset in current buffer */ 72 long dd_size; /* amount of data returned by getdirentries */ 73 char *dd_buf; /* data buffer */ 74 int dd_len; /* size of data buffer */ 75 long dd_seek; /* magic cookie returned by getdirentries */ 76 void *dd_ddloc; /* Linked list of ddloc structs for telldir/seekdir */ 77 } DIR; 78 79 #define dirfd(dirp) ((dirp)->dd_fd) 80 81 #ifndef NULL 82 #define NULL 0 83 #endif 84 85 #endif /* _POSIX_SOURCE */ 86 87 #ifndef KERNEL 88 89 #include <sys/cdefs.h> 90 91 __BEGIN_DECLS 92 DIR *opendir __P((const char *)); 93 struct dirent *readdir __P((DIR *)); 94 void rewinddir __P((DIR *)); 95 int closedir __P((DIR *)); 96 #ifndef _POSIX_SOURCE 97 long telldir __P((const DIR *)); 98 void seekdir __P((DIR *, long)); 99 int scandir __P((const char *, struct dirent ***, 100 int (*)(struct dirent *), int (*)(const void *, const void *))); 101 int alphasort __P((const void *, const void *)); 102 int getdirentries __P((int, char *, int, long *)); 103 #endif /* not POSIX */ 104 __END_DECLS 105 106 #endif /* !KERNEL */ 107 108 #endif /* !_DIRENT_H_ */ 109