read_bb_file.c revision e0ed7404719a9ddd2ba427a80db5365c8bad18c0
1/* 2 * read_bb_file.c --- read a list of bad blocks from a FILE * 3 * 4 * Copyright (C) 1994, 1995, 2000 Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Library 8 * General Public License, version 2. 9 * %End-Header% 10 */ 11 12#include <stdio.h> 13#include <string.h> 14#if HAVE_UNISTD_H 15#include <unistd.h> 16#endif 17#include <fcntl.h> 18#include <time.h> 19#if HAVE_SYS_STAT_H 20#include <sys/stat.h> 21#endif 22#if HAVE_SYS_TYPES_H 23#include <sys/types.h> 24#endif 25 26#include "ext2_fs.h" 27#include "ext2fs.h" 28 29/* 30 * Reads a list of bad blocks from a FILE * 31 */ 32errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 33 ext2_badblocks_list *bb_list, 34 void *priv_data, 35 void (*invalid)(ext2_filsys fs, 36 blk_t blk, 37 char *badstr, 38 void *priv_data)) 39{ 40 errcode_t retval; 41 blk64_t blockno; 42 int count; 43 char buf[128]; 44 45 if (fs) 46 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); 47 48 if (!*bb_list) { 49 retval = ext2fs_badblocks_list_create(bb_list, 10); 50 if (retval) 51 return retval; 52 } 53 54 while (!feof (f)) { 55 if (fgets(buf, sizeof(buf), f) == NULL) 56 break; 57 count = sscanf(buf, "%llu", &blockno); 58 if (count <= 0) 59 continue; 60 /* Badblocks isn't going to be updated for 64bit */ 61 if (blockno >> 32) 62 return EOVERFLOW; 63 if (fs && 64 ((blockno < fs->super->s_first_data_block) || 65 (blockno >= ext2fs_blocks_count(fs->super)))) { 66 if (invalid) 67 (invalid)(fs, blockno, buf, priv_data); 68 continue; 69 } 70 retval = ext2fs_badblocks_list_add(*bb_list, blockno); 71 if (retval) 72 return retval; 73 } 74 return 0; 75} 76 77struct compat_struct { 78 void (*invalid)(ext2_filsys, blk_t); 79}; 80 81static void call_compat_invalid(ext2_filsys fs, blk_t blk, 82 char *badstr EXT2FS_ATTR((unused)), 83 void *priv_data) 84{ 85 struct compat_struct *st; 86 87 st = (struct compat_struct *) priv_data; 88 if (st->invalid) 89 (st->invalid)(fs, blk); 90} 91 92 93/* 94 * Reads a list of bad blocks from a FILE * 95 */ 96errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 97 ext2_badblocks_list *bb_list, 98 void (*invalid)(ext2_filsys fs, blk_t blk)) 99{ 100 struct compat_struct st; 101 102 st.invalid = invalid; 103 104 return ext2fs_read_bb_FILE2(fs, f, bb_list, &st, 105 call_compat_invalid); 106} 107 108 109