数据恢复软件源码　C源码

/* File: fat_adv.c Copyright (C) 1998-2009 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> #include <ctype.h> #ifdef HAVE_STRING_H #include <string.h> #endif #ifdef HAVE_STDLIB_H #include <stdlib.h> #endif #ifdef HAVE_TIME_H #include <time.h> #endif #ifdef HAVE_SYS_STAT_H #include <sys/stat.h> #endif #include "types.h" #include "common.h" #include "fat.h" #include "lang.h" #include "fnctdsk.h" #include "intrf.h" #include "intrfn.h" #include "dir.h" #include "dirpart.h" #include "fat_dir.h" #include "io_redir.h" #include "log.h" #include "log_part.h" #include "fat_adv.h" #include "fat_cluster.h" #ifdef HAVE_NCURSES #include "fatn.h" #endif #define INTER_FAT_ASK_X 0 #define INTER_FAT_ASK_Y 23 #define INTER_FATBS_X 0 #define INTER_FATBS_Y 22 extern const char *monstr[]; typedef struct info_offset_struct info_offset_t; struct info_offset_struct { unsigned long int offset; unsigned int nbr; unsigned int fat_type; }; static upart_type_t fat_find_info(disk_t *disk_car,unsigned int*reserved, unsigned int*fat_length, const partition_t *partition,const uint64_t max_offset,const int p_fat12,const int p_fat16,const int p_fat32,const int verbose,const int dump_ind,const int interface, const unsigned int expert, unsigned int *fats); static int fat_find_type(disk_t *disk_car,const partition_t *partition,const uint64_t max_offset,const int p_fat12,const int p_fat16,const int p_fat32,const int verbose,const int dump_ind,const int interface,unsigned int *nbr_offset,info_offset_t *info_offset, const unsigned int max_nbr_offset); static unsigned int fat_find_fat_start(const unsigned char *buffer,const int p_fat12, const int p_fat16, const int p_fat32,unsigned long int*fat_offset, const unsigned int sector_size); static void create_fat_boot_sector(disk_t *disk_car, partition_t *partition, const unsigned int reserved, const int verbose, const unsigned int dir_entries, const unsigned long int root_cluster, const unsigned int sectors_per_cluster, const unsigned int fat_length,const int interface, const upart_type_t upart_type, const unsigned int fats, char **current_cmd); static unsigned int fat32_find_root_cluster(disk_t *disk_car,const partition_t *partition,const unsigned int sectors_per_cluster, const unsigned long int no_of_cluster, const unsigned int reserved, const unsigned int fat_length, const int interface, const int verbose, const unsigned int expert, const unsigned int first_free_cluster, const unsigned int fats); static int write_FAT_boot_code_aux(unsigned char *buffer); static int find_dir_entries(disk_t *disk_car,const partition_t *partition, const unsigned int offset,const int verbose); static int analyse_dir_entries(disk_t *disk_car,const partition_t *partition, const unsigned int offset, const int verbose); static int analyse_dir_entries2(disk_t *disk_car,const partition_t *partition, const unsigned int reserved, const unsigned int fat_length,const int verbose, unsigned int root_size_max,const upart_type_t upart_type, const unsigned int fats); static int calcul_sectors_per_cluster(const upart_type_t upart_type, const unsigned long int data_size, const unsigned int fat_length, const unsigned int sector_size); static int check_FAT_dir_entry(const unsigned char *entry, const unsigned int entry_nr); static unsigned long int get_subdirectory(disk_t *disk_car,const uint64_t hd_offset, const unsigned long int i); #ifdef HAVE_NCURSES static void fat_date_unix2dos(int unix_date,unsigned short *mstime, unsigned short *msdate); static int fat32_create_rootdir(disk_t *disk_car,const partition_t *partition, const unsigned int reserved, const unsigned int fat_length, const unsigned int root_cluster, const unsigned int sectors_per_cluster, const int verbose, file_data_t *rootdir_list, const unsigned int fats); static upart_type_t select_fat_info(const info_offset_t *info_offset, const unsigned int nbr_offset,unsigned int*reserved, unsigned int*fat_length, const unsigned long int max_sector_offset, unsigned int *fats); #endif /* * 0 entry is free * 1 entry is used * 2 not an entry * */ static int check_FAT_dir_entry(const unsigned char *entry, const unsigned int entry_nr) { int i; if((entry[0xB]&ATTR_EXT_MASK)==ATTR_EXT) return 1; /* log_trace("check_FAT_dir_entry %02x\n",*(entry+0)); */ if(entry[0]==0) { for(i=0;i<0x20;i++) if(entry[i]!='\0') return 2; return 0; } if(entry[0]==0x20) return 2; if(entry[0]==0xE5) return 1; if(entry_nr<10 && (entry[0xB]&ATTR_VOLUME)==ATTR_VOLUME) return 1; for(i=0;i<8+3;i++) { const unsigned char car=entry[i]; if((car>=0x06 && car<=0x1f)|| (car>=0x3a && car<=0x3f)|| (car>='a' && car<='z')) return 2; switch(car) { case 0x1: case 0x2: case 0x3: case 0x4: case '"': case '*': case '+': case ',': case '.': case '/': case '[': case '\\': case ']': case '|': /*log_trace("check_FAT_dir_entry bad %c (%02x)\n",car,car); */ return 2; default: /*log_trace("check_FAT_dir_entry good %c (%02x)\n",car,car); */ break; } } return 1; } /* */ static unsigned long int get_subdirectory(disk_t *disk_car,const uint64_t hd_offset,const unsigned long int i) { unsigned char buffer[DEFAULT_SECTOR_SIZE]; if(disk_car->pread(disk_car, &buffer, sizeof(buffer), hd_offset) != sizeof(buffer)) { log_error("fat_dir, get_subdirectory(), can't read directory\n"); return 1; } /* dump_ncurses(buffer,DEFAULT_SECTOR_SIZE); */ /* 12345678123*/ if(memcmp(&buffer[0],". ",8+3)!=0) return 1; if((unsigned)((buffer[0x15]<<24)|(buffer[0x14]<<16)|(buffer[0x1B]<<8)|buffer[0x1A])!=i) return 1; /* 12345678123*/ if(memcmp(&buffer[0x20],".. ",8+3)!=0) return 1; return (buffer[0x35]<<24)+(buffer[0x34]<<16)+(buffer[0x3B]<<8)+buffer[0x3A]; } #ifdef HAVE_NCURSES #define INTER_DIR 16 static int ask_root_directory(disk_t *disk_car, const partition_t *partition, const file_data_t*dir_list, const unsigned long int cluster) { /* Return value * -1: quit * 1: back * other: new cluster * */ int car='A'; int quit=0; int offset=0; int pos_num=0; const file_data_t *current_file; const file_data_t *pos=dir_list; WINDOW *window; window=newwin(LINES, COLS, 0, 0); /* full screen */ aff_copy(window); wmove(window,4,0); aff_part(window,AFF_PART_ORDER|AFF_PART_STATUS,disk_car,partition); wmove(window,6,0); wprintw(window,"Answer Y(es), N(o), Q(uit) or A(bort interactive mode). N or A if not sure."); curs_set(1); do { int i; for(i=0,current_file=dir_list;(current_file!=NULL) && (i<offset);current_file=current_file->next,i++); for(i=offset;(current_file!=NULL) &&((i-offset)<INTER_DIR);i++,current_file=current_file->next) { struct tm *tm_p; char str[11]; char datestr[80]; wmove(window,8+i-offset,0); wclrtoeol(window); /* before addstr for BSD compatibility */ if(current_file==pos) { wattrset(window, A_REVERSE); waddstr(window, ">"); } else waddstr(window, " "); if(current_file->stat.st_mtime!=0