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/* libguestfs
* Copyright (C) 2016 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include "guestfs.h"
#include "guestfs_protocol.h"
#include "guestfs-internal.h"
#include "guestfs-internal-all.h"
#include "guestfs-internal-actions.h"
static struct guestfs_tsk_dirent_list *parse_dirent_file (guestfs_h *, const char *);
static int deserialise_dirent_list (guestfs_h *, FILE *, struct guestfs_tsk_dirent_list *);
struct guestfs_tsk_dirent_list *
guestfs_impl_filesystem_walk (guestfs_h *g, const char *mountable)
{
int ret = 0;
CLEANUP_UNLINK_FREE char *tmpfile = NULL;
tmpfile = guestfs_int_make_temp_path (g, "filesystem_walk", NULL);
if (tmpfile == NULL)
return NULL;
ret = guestfs_internal_filesystem_walk (g, mountable, tmpfile);
if (ret < 0)
return NULL;
return parse_dirent_file (g, tmpfile); /* caller frees */
}
struct guestfs_tsk_dirent_list *
guestfs_impl_find_inode (guestfs_h *g, const char *mountable, int64_t inode)
{
int ret = 0;
CLEANUP_UNLINK_FREE char *tmpfile = NULL;
tmpfile = guestfs_int_make_temp_path (g, "find_inode", NULL);
if (tmpfile == NULL)
return NULL;
ret = guestfs_internal_find_inode (g, mountable, inode, tmpfile);
if (ret < 0)
return NULL;
return parse_dirent_file (g, tmpfile); /* caller frees */
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wanalyzer-file-leak"
/* Parse the file content and return dirents list.
* Return a list of tsk_dirent on success, NULL on error.
*/
static struct guestfs_tsk_dirent_list *
parse_dirent_file (guestfs_h *g, const char *tmpfile)
{
int ret = 0;
CLEANUP_FCLOSE FILE *fp = NULL;
struct guestfs_tsk_dirent_list *dirents = NULL;
fp = fopen (tmpfile, "r");
if (fp == NULL) {
perrorf (g, "fopen: %s", tmpfile);
return NULL;
}
/* Initialise results array. */
dirents = safe_malloc (g, sizeof (*dirents));
dirents->len = 8;
dirents->val = safe_malloc (g, dirents->len * sizeof (*dirents->val));
/* Deserialise buffer into dirent list. */
ret = deserialise_dirent_list (g, fp, dirents);
if (ret < 0) {
guestfs_free_tsk_dirent_list (dirents);
return NULL;
}
return dirents;
}
#pragma GCC diagnostic pop
/* Deserialise the file content and populate the dirent list.
* Return the number of deserialised dirents, -1 on error.
*/
static int
deserialise_dirent_list (guestfs_h *g, FILE *fp,
struct guestfs_tsk_dirent_list *dirents)
{
XDR xdr;
int ret = 0;
uint32_t index = 0;
struct stat statbuf;
ret = fstat (fileno(fp), &statbuf);
if (ret == -1)
return -1;
xdrstdio_create (&xdr, fp, XDR_DECODE);
for (index = 0; xdr_getpos (&xdr) < statbuf.st_size; index++) {
if (index == dirents->len) {
dirents->len = 2 * dirents->len;
dirents->val = safe_realloc (g, dirents->val,
dirents->len *
sizeof (*dirents->val));
}
/* Clear the entry so xdr logic will allocate necessary memory. */
memset (&dirents->val[index], 0, sizeof (*dirents->val));
ret = xdr_guestfs_int_tsk_dirent (&xdr, (guestfs_int_tsk_dirent *)
&dirents->val[index]);
if (ret == 0)
break;
}
xdr_destroy (&xdr);
dirents->len = index;
return ret ? 0 : -1;
}
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