1 /*
2 * ehandler.c --- handle bad block errors which come up during the
3 * course of an e2fsck session.
4 *
5 * Copyright (C) 1994 Theodore Ts'o. This file may be redistributed
6 * under the terms of the GNU Public License.
7 */
8
9 #include "config.h"
10 #include <stdlib.h>
11 #include <unistd.h>
12 #include <string.h>
13 #include <ctype.h>
14 #include <termios.h>
15
16 #include "e2fsck.h"
17
18 #include <sys/time.h>
19 #include <sys/resource.h>
20
21 static const char *operation;
22
e2fsck_handle_read_error(io_channel channel,unsigned long block,int count,void * data,size_t size EXT2FS_ATTR ((unused)),int actual EXT2FS_ATTR ((unused)),errcode_t error)23 static errcode_t e2fsck_handle_read_error(io_channel channel,
24 unsigned long block,
25 int count,
26 void *data,
27 size_t size EXT2FS_ATTR((unused)),
28 int actual EXT2FS_ATTR((unused)),
29 errcode_t error)
30 {
31 int i;
32 char *p;
33 ext2_filsys fs = (ext2_filsys) channel->app_data;
34 e2fsck_t ctx;
35
36 ctx = (e2fsck_t) fs->priv_data;
37 if (ctx->flags & E2F_FLAG_EXITING)
38 return 0;
39 /*
40 * If more than one block was read, try reading each block
41 * separately. We could use the actual bytes read to figure
42 * out where to start, but we don't bother.
43 */
44 if (count > 1) {
45 p = (char *) data;
46 for (i=0; i < count; i++, p += channel->block_size, block++) {
47 error = io_channel_read_blk64(channel, block,
48 1, p);
49 if (error)
50 return error;
51 }
52 return 0;
53 }
54 if (operation)
55 printf(_("Error reading block %lu (%s) while %s. "), block,
56 error_message(error), operation);
57 else
58 printf(_("Error reading block %lu (%s). "), block,
59 error_message(error));
60 preenhalt(ctx);
61
62 /* Don't rewrite a block past the end of the FS. */
63 if (block >= ext2fs_blocks_count(fs->super))
64 return 0;
65
66 if (ask(ctx, _("Ignore error"), 1)) {
67 if (ask(ctx, _("Force rewrite"), 1))
68 io_channel_write_blk64(channel, block, count, data);
69 return 0;
70 }
71
72 return error;
73 }
74
e2fsck_handle_write_error(io_channel channel,unsigned long block,int count,const void * data,size_t size EXT2FS_ATTR ((unused)),int actual EXT2FS_ATTR ((unused)),errcode_t error)75 static errcode_t e2fsck_handle_write_error(io_channel channel,
76 unsigned long block,
77 int count,
78 const void *data,
79 size_t size EXT2FS_ATTR((unused)),
80 int actual EXT2FS_ATTR((unused)),
81 errcode_t error)
82 {
83 int i;
84 const char *p;
85 ext2_filsys fs = (ext2_filsys) channel->app_data;
86 e2fsck_t ctx;
87
88 ctx = (e2fsck_t) fs->priv_data;
89 if (ctx->flags & E2F_FLAG_EXITING)
90 return 0;
91
92 /*
93 * If more than one block was written, try writing each block
94 * separately. We could use the actual bytes read to figure
95 * out where to start, but we don't bother.
96 */
97 if (count > 1) {
98 p = (const char *) data;
99 for (i=0; i < count; i++, p += channel->block_size, block++) {
100 error = io_channel_write_blk64(channel, block,
101 1, p);
102 if (error)
103 return error;
104 }
105 return 0;
106 }
107
108 if (operation)
109 printf(_("Error writing block %lu (%s) while %s. "), block,
110 error_message(error), operation);
111 else
112 printf(_("Error writing block %lu (%s). "), block,
113 error_message(error));
114 preenhalt(ctx);
115 if (ask(ctx, _("Ignore error"), 1))
116 return 0;
117
118 return error;
119 }
120
ehandler_operation(const char * op)121 const char *ehandler_operation(const char *op)
122 {
123 const char *ret = operation;
124
125 operation = op;
126 return ret;
127 }
128
ehandler_init(io_channel channel)129 void ehandler_init(io_channel channel)
130 {
131 channel->read_error = e2fsck_handle_read_error;
132 channel->write_error = e2fsck_handle_write_error;
133 }
134