2 * get_pathname.c --- do directory/inode -> name translation
4 * Copyright (C) 1993, 1994, 1995 Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
14 * ext2fs_get_pathname(fs, dir, ino, name)
16 * This function translates takes two inode numbers into a
17 * string, placing the result in <name>. <dir> is the containing
18 * directory inode, and <ino> is the inode number itself. If
19 * <ino> is zero, then ext2fs_get_pathname will return pathname
20 * of the the directory <dir>.
34 struct get_pathname_struct {
35 ext2_ino_t search_ino;
44 static int get_pathname_proc(struct ext2_dir_entry *dirent,
45 int offset EXT2FS_ATTR((unused)),
46 int blocksize EXT2FS_ATTR((unused)),
47 char *buf EXT2FS_ATTR((unused)),
50 struct get_pathname_struct *gp;
52 int name_len = ext2fs_dirent_name_len(dirent);
54 gp = (struct get_pathname_struct *) priv_data;
56 if ((name_len == 2) && !strncmp(dirent->name, "..", 2))
57 gp->parent = dirent->inode;
58 if (dirent->inode == gp->search_ino) {
59 retval = ext2fs_get_mem(name_len + 1, &gp->name);
64 strncpy(gp->name, dirent->name, name_len);
65 gp->name[name_len] = '\0';
71 static errcode_t ext2fs_get_pathname_int(ext2_filsys fs, ext2_ino_t dir,
72 ext2_ino_t ino, int maxdepth,
73 char *buf, char **name)
75 struct get_pathname_struct gp;
76 char *parent_name = 0, *ret;
80 retval = ext2fs_get_mem(2, name);
83 strcpy(*name, (dir == EXT2_ROOT_INO) ? "/" : ".");
87 if (!dir || (maxdepth < 0)) {
88 retval = ext2fs_get_mem(4, name);
100 retval = ext2fs_dir_iterate(fs, dir, 0, buf, get_pathname_proc, &gp);
101 if (retval == EXT2_ET_NO_DIRECTORY) {
105 snprintf(tmp, sizeof(tmp), "<%u>/<%u>", dir, ino);
107 snprintf(tmp, sizeof(tmp), "<%u>", dir);
108 retval = ext2fs_get_mem(strlen(tmp)+1, name);
120 retval = ext2fs_get_pathname_int(fs, gp.parent, dir, maxdepth-1,
130 retval = ext2fs_get_mem(strlen(parent_name)+strlen(gp.name)+2,
133 retval = ext2fs_get_mem(strlen(parent_name)+5, &ret);
139 strcat(ret, parent_name);
142 strcat(ret, gp.name);
149 ext2fs_free_mem(&parent_name);
150 ext2fs_free_mem(&gp.name);
154 errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
160 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
162 retval = ext2fs_get_mem(fs->blocksize, &buf);
167 retval = ext2fs_get_pathname_int(fs, dir, ino, 32, buf, name);
168 ext2fs_free_mem(&buf);