158 lines
3.3 KiB
C
158 lines
3.3 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* get_pathname.c --- do directry/inode -> name translation
|
|
*
|
|
* Copyright (C) 1993, 1994, 1995 Theodore Ts'o.
|
|
*
|
|
* %Begin-Header%
|
|
* This file may be redistributed under the terms of the GNU Public
|
|
* License.
|
|
* %End-Header%
|
|
*
|
|
* ext2fs_get_pathname(fs, dir, ino, name)
|
|
*
|
|
* This function translates takes two inode numbers into a
|
|
* string, placing the result in <name>. <dir> is the containing
|
|
* directory inode, and <ino> is the inode number itself. If
|
|
* <ino> is zero, then ext2fs_get_pathname will return pathname
|
|
* of the the directory <dir>.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include "ext2_fs.h"
|
|
#include "ext2fs.h"
|
|
|
|
struct get_pathname_struct {
|
|
ext2_ino_t search_ino;
|
|
ext2_ino_t parent;
|
|
char *name;
|
|
errcode_t errcode;
|
|
};
|
|
|
|
#ifdef __TURBOC__
|
|
# pragma argsused
|
|
#endif
|
|
static int get_pathname_proc(struct ext2_dir_entry *dirent,
|
|
int offset EXT2FS_ATTR((unused)),
|
|
int blocksize EXT2FS_ATTR((unused)),
|
|
char *buf EXT2FS_ATTR((unused)),
|
|
void *priv_data)
|
|
{
|
|
struct get_pathname_struct *gp;
|
|
errcode_t retval;
|
|
|
|
gp = (struct get_pathname_struct *) priv_data;
|
|
|
|
if (((dirent->name_len & 0xFF) == 2) &&
|
|
!strncmp(dirent->name, "..", 2))
|
|
gp->parent = dirent->inode;
|
|
if (dirent->inode == gp->search_ino) {
|
|
retval = ext2fs_get_mem((dirent->name_len & 0xFF) + 1,
|
|
&gp->name);
|
|
if (retval) {
|
|
gp->errcode = retval;
|
|
return DIRENT_ABORT;
|
|
}
|
|
strncpy(gp->name, dirent->name, (dirent->name_len & 0xFF));
|
|
gp->name[dirent->name_len & 0xFF] = '\0';
|
|
return DIRENT_ABORT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static errcode_t ext2fs_get_pathname_int(ext2_filsys fs, ext2_ino_t dir,
|
|
ext2_ino_t ino, int maxdepth,
|
|
char *buf, char **name)
|
|
{
|
|
struct get_pathname_struct gp;
|
|
char *parent_name, *ret;
|
|
errcode_t retval;
|
|
|
|
if (dir == ino) {
|
|
retval = ext2fs_get_mem(2, name);
|
|
if (retval)
|
|
return retval;
|
|
strcpy(*name, (dir == EXT2_ROOT_INO) ? "/" : ".");
|
|
return 0;
|
|
}
|
|
|
|
if (!dir || (maxdepth < 0)) {
|
|
retval = ext2fs_get_mem(4, name);
|
|
if (retval)
|
|
return retval;
|
|
strcpy(*name, "...");
|
|
return 0;
|
|
}
|
|
|
|
gp.search_ino = ino;
|
|
gp.parent = 0;
|
|
gp.name = 0;
|
|
gp.errcode = 0;
|
|
|
|
retval = ext2fs_dir_iterate(fs, dir, 0, buf, get_pathname_proc, &gp);
|
|
if (retval)
|
|
goto cleanup;
|
|
if (gp.errcode) {
|
|
retval = gp.errcode;
|
|
goto cleanup;
|
|
}
|
|
|
|
retval = ext2fs_get_pathname_int(fs, gp.parent, dir, maxdepth-1,
|
|
buf, &parent_name);
|
|
if (retval)
|
|
goto cleanup;
|
|
if (!ino) {
|
|
*name = parent_name;
|
|
return 0;
|
|
}
|
|
|
|
if (gp.name)
|
|
retval = ext2fs_get_mem(strlen(parent_name)+strlen(gp.name)+2,
|
|
&ret);
|
|
else
|
|
retval = ext2fs_get_mem(strlen(parent_name)+5, &ret);
|
|
if (retval)
|
|
goto cleanup;
|
|
|
|
ret[0] = 0;
|
|
if (parent_name[1])
|
|
strcat(ret, parent_name);
|
|
strcat(ret, "/");
|
|
if (gp.name)
|
|
strcat(ret, gp.name);
|
|
else
|
|
strcat(ret, "???");
|
|
*name = ret;
|
|
ext2fs_free_mem(&parent_name);
|
|
retval = 0;
|
|
|
|
cleanup:
|
|
ext2fs_free_mem(&gp.name);
|
|
return retval;
|
|
}
|
|
|
|
errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
|
|
char **name)
|
|
{
|
|
char *buf;
|
|
errcode_t retval;
|
|
|
|
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
|
|
|
|
retval = ext2fs_get_mem(fs->blocksize, &buf);
|
|
if (retval)
|
|
return retval;
|
|
if (dir == ino)
|
|
ino = 0;
|
|
retval = ext2fs_get_pathname_int(fs, dir, ino, 32, buf, name);
|
|
ext2fs_free_mem(&buf);
|
|
return retval;
|
|
|
|
}
|