summaryrefslogtreecommitdiffstats
path: root/src/qphbs.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/qphbs.cpp')
-rw-r--r--src/qphbs.cpp214
1 files changed, 214 insertions, 0 deletions
diff --git a/src/qphbs.cpp b/src/qphbs.cpp
new file mode 100644
index 0000000..0d81d73
--- /dev/null
+++ b/src/qphbs.cpp
@@ -0,0 +1,214 @@
+/*
+
+ File: qphbs.c
+
+ Copyright (C) 1998-2013 Christophe GRENIER <grenier@cgsecurity.org>
+
+ This software is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write the Free Software Foundation, Inc., 51
+ Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#include <QCoreApplication>
+#include "types.h"
+#include "common.h"
+#include "intrf.h"
+#include "list.h"
+#include "filegen.h"
+#include "log.h"
+#include "file_tar.h"
+#include "pnext.h"
+#include "file_found.h"
+#include "qphotorec.h"
+
+#define READ_SIZE 1024*512
+extern const file_hint_t file_hint_tar;
+extern file_check_list_t file_check_list;
+
+static inline void file_recovery_cpy(file_recovery_t *dst, file_recovery_t *src)
+{
+ memcpy(dst, src, sizeof(*dst));
+ dst->location.list.prev=&dst->location.list;
+ dst->location.list.next=&dst->location.list;
+}
+
+pstatus_t QPhotorec::photorec_find_blocksize(alloc_data_t *list_search_space)
+{
+ uint64_t offset=0;
+ unsigned char *buffer_start;
+ unsigned char *buffer_olddata;
+ unsigned char *buffer;
+ time_t start_time;
+ time_t previous_time;
+ unsigned int buffer_size;
+ const unsigned int blocksize=params->blocksize;
+ const unsigned int read_size=(blocksize>65536?blocksize:65536);
+ alloc_data_t *current_search_space;
+ file_recovery_t file_recovery;
+
+ params->file_nbr=0;
+ reset_file_recovery(&file_recovery);
+ file_recovery.blocksize=blocksize;
+ buffer_size=blocksize + READ_SIZE;
+ buffer_start=(unsigned char *)MALLOC(buffer_size);
+ buffer_olddata=buffer_start;
+ buffer=buffer_olddata + blocksize;
+ start_time=time(NULL);
+ previous_time=start_time;
+ memset(buffer_olddata, 0, blocksize);
+ current_search_space=td_list_entry(list_search_space->list.next, alloc_data_t, list);
+ if(current_search_space!=list_search_space)
+ offset=current_search_space->start;
+ if(options->verbose>0)
+ info_list_search_space(list_search_space, current_search_space, params->disk->sector_size, 0, options->verbose);
+ params->offset=offset;
+ QCoreApplication::processEvents();
+ params->disk->pread(params->disk, buffer, READ_SIZE, offset);
+ while(current_search_space!=list_search_space)
+ {
+ uint64_t old_offset=offset;
+ {
+ file_recovery_t file_recovery_new;
+ if(file_recovery.file_stat!=NULL &&
+ file_recovery.file_stat->file_hint->min_header_distance > 0 &&
+ file_recovery.file_size<=file_recovery.file_stat->file_hint->min_header_distance)
+ {
+ }
+ else if(file_recovery.file_stat!=NULL && file_recovery.file_stat->file_hint==&file_hint_tar &&
+ header_check_tar(buffer-0x200,0x200,0,&file_recovery,&file_recovery_new))
+ { /* Currently saving a tar, do not check the data for know header */
+ }
+ else
+ {
+ const struct td_list_head *tmpl;
+ file_recovery_new.file_stat=NULL;
+ td_list_for_each(tmpl, &file_check_list.list)
+ {
+ const struct td_list_head *tmp;
+ const file_check_list_t *tmp2=td_list_entry_const(tmpl, const file_check_list_t, list);
+ td_list_for_each(tmp, &tmp2->file_checks[buffer[tmp2->offset]].list)
+ {
+ const file_check_t *file_check=td_list_entry_const(tmp, const file_check_t, list);
+ if((file_check->length==0 || memcmp(buffer + file_check->offset, file_check->value, file_check->length)==0) &&
+ file_check->header_check(buffer, read_size, 1, &file_recovery, &file_recovery_new)!=0)
+ {
+ file_recovery_new.file_stat=file_check->file_stat;
+ break;
+ }
+ }
+ if(file_recovery_new.file_stat!=NULL)
+ break;
+ }
+ if(file_recovery_new.file_stat!=NULL && file_recovery_new.file_stat->file_hint!=NULL)
+ {
+ /* A new file begins, backup file offset */
+ current_search_space=file_found(current_search_space, offset, file_recovery_new.file_stat);
+ params->file_nbr++;
+ file_recovery_cpy(&file_recovery, &file_recovery_new);
+ }
+ }
+ }
+ /* Check for data EOF */
+ if(file_recovery.file_stat!=NULL)
+ {
+ int res=1;
+ if(file_recovery.data_check!=NULL)
+ res=file_recovery.data_check(buffer_olddata, 2*blocksize, &file_recovery);
+ file_recovery.file_size+=blocksize;
+ file_recovery.file_size_on_disk+=blocksize;
+ if(res==2)
+ {
+ /* EOF found */
+ reset_file_recovery(&file_recovery);
+ }
+ }
+ /* Check for maximum filesize */
+ if(file_recovery.file_stat!=NULL && file_recovery.file_stat->file_hint->max_filesize>0 && file_recovery.file_size>=file_recovery.file_stat->file_hint->max_filesize)
+ {
+ reset_file_recovery(&file_recovery);
+ }
+
+ if(params->file_nbr >= 10)
+ {
+ current_search_space=list_search_space;
+ }
+ else
+ {
+ get_next_sector(list_search_space, &current_search_space, &offset, blocksize);
+ params->offset=offset;
+ }
+ if(current_search_space==list_search_space)
+ {
+ /* End of disk found => EOF */
+ reset_file_recovery(&file_recovery);
+ }
+ buffer_olddata+=blocksize;
+ buffer+=blocksize;
+ if( old_offset+blocksize!=offset ||
+ buffer+read_size>buffer_start+buffer_size)
+ {
+ memcpy(buffer_start, buffer_olddata, blocksize);
+ buffer_olddata=buffer_start;
+ buffer=buffer_olddata+blocksize;
+ if(options->verbose>1)
+ {
+ log_verbose("Reading sector %10llu/%llu\n",
+ (unsigned long long)((offset - params->partition->part_offset) / params->disk->sector_size),
+ (unsigned long long)((params->partition->part_size-1) / params->disk->sector_size));
+ }
+ if(params->disk->pread(params->disk, buffer, READ_SIZE, offset) != READ_SIZE)
+ {
+#ifdef HAVE_NCURSES_XXX
+ wmove(stdscr,11,0);
+ wclrtoeol(stdscr);
+ wprintw(stdscr,"Error reading sector %10lu\n",
+ (unsigned long)((offset - params->partition->part_offset) / params->disk->sector_size));
+#endif
+ }
+ {
+ time_t current_time;
+ current_time=time(NULL);
+ if(current_time>previous_time)
+ {
+ previous_time=current_time;
+ QCoreApplication::processEvents();
+ if(stop_the_recovery)
+ {
+ log_info("PhotoRec has been stopped\n");
+ current_search_space=list_search_space;
+ }
+ }
+ }
+ }
+ } /* end while(current_search_space!=list_search_space) */
+ free(buffer_start);
+ return PSTATUS_OK;
+}