1 /* $NetBSD: virtdir.h,v 1.3 2017/11/26 03:51:45 christos Exp $ */ 2 3 /* 4 * Copyright � 2007 Alistair Crooks. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote 15 * products derived from this software without specific prior written 16 * permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 24 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef VIRTDIR_H_ 32 #define VIRTDIR_H_ 20070405 33 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 37 /* this struct keeps a note of all the info related to a virtual directory entry */ 38 typedef struct virt_dirent_t { 39 char *name; /* entry name - used as key */ 40 size_t namelen; /* length of name */ 41 char *d_name; /* component in this directory */ 42 char *tgt; /* any symlink target */ 43 size_t tgtlen; /* length of symlink target */ 44 uint8_t type; /* entry type - file, dir, lnk */ 45 ino_t ino; /* inode number */ 46 uint16_t select; /* selector */ 47 } virt_dirent_t; 48 49 /* this defines the list of virtual directory entries, 50 sorted in name alpha order */ 51 typedef struct virtdir_t { 52 uint32_t c; /* count of entries */ 53 uint32_t size; /* size of allocated list */ 54 virt_dirent_t *v; /* list */ 55 char *rootdir; /* root directory of virtual fs */ 56 struct stat file; /* stat struct for file entries */ 57 struct stat dir; /* stat struct for dir entries */ 58 struct stat lnk; /* stat struct for symlinks */ 59 } virtdir_t; 60 61 /* this struct is used to walk through directories */ 62 typedef struct VIRTDIR { 63 char *dirname; /* directory name */ 64 size_t dirnamelen; /* length of directory name */ 65 virtdir_t *tp; /* the directory tree */ 66 size_t i; /* current offset in dir tree */ 67 } VIRTDIR; 68 69 int virtdir_init(virtdir_t *, const char *, const struct stat *, 70 const struct stat *, const struct stat *); 71 int virtdir_add(virtdir_t *, const char *, size_t, uint8_t, const char *, 72 size_t, uint16_t); 73 virt_dirent_t *virtdir_find(virtdir_t *, const char *, size_t); 74 75 VIRTDIR *openvirtdir(virtdir_t *, const char *); 76 virt_dirent_t *readvirtdir(VIRTDIR *); 77 void closevirtdir(VIRTDIR *); 78 79 off_t virtdir_offset(const virtdir_t *, const virt_dirent_t *); 80 81 #endif 82