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 <stdlib.h>
10 #include <unistd.h>
11 #include <string.h>
12 #include <ctype.h>
13 #include <termios.h>
14
15 #include "e2fsck.h"
16
17 #include <sys/time.h>
18 #include <sys/resource.h>
19
20 static const char *operation;
21
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)22 static errcode_t e2fsck_handle_read_error(io_channel channel,
23 unsigned long block,
24 int count,
25 void *data,
26 size_t size EXT2FS_ATTR((unused)),
27 int actual EXT2FS_ATTR((unused)),
28 errcode_t error)
29 {
30 int i;
31 char *p;
32 ext2_filsys fs = (ext2_filsys) channel->app_data;
33 e2fsck_t ctx;
34
35 ctx = (e2fsck_t) fs->priv_data;
36
37 /*
38 * If more than one block was read, try reading each block
39 * separately. We could use the actual bytes read to figure
40 * out where to start, but we don't bother.
41 */
42 if (count > 1) {
43 p = (char *) data;
44 for (i=0; i < count; i++, p += channel->block_size, block++) {
45 error = io_channel_read_blk(channel, block,
46 1, p);
47 if (error)
48 return error;
49 }
50 return 0;
51 }
52 if (operation)
53 printf(_("Error reading block %lu (%s) while %s. "), block,
54 error_message(error), operation);
55 else
56 printf(_("Error reading block %lu (%s). "), block,
57 error_message(error));
58 preenhalt(ctx);
59 if (ask(ctx, _("Ignore error"), 1)) {
60 if (ask(ctx, _("Force rewrite"), 1))
61 io_channel_write_blk(channel, block, 1, data);
62 return 0;
63 }
64
65 return error;
66 }
67
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)68 static errcode_t e2fsck_handle_write_error(io_channel channel,
69 unsigned long block,
70 int count,
71 const void *data,
72 size_t size EXT2FS_ATTR((unused)),
73 int actual EXT2FS_ATTR((unused)),
74 errcode_t error)
75 {
76 int i;
77 const char *p;
78 ext2_filsys fs = (ext2_filsys) channel->app_data;
79 e2fsck_t ctx;
80
81 ctx = (e2fsck_t) fs->priv_data;
82
83 /*
84 * If more than one block was written, try writing each block
85 * separately. We could use the actual bytes read to figure
86 * out where to start, but we don't bother.
87 */
88 if (count > 1) {
89 p = (const char *) data;
90 for (i=0; i < count; i++, p += channel->block_size, block++) {
91 error = io_channel_write_blk(channel, block,
92 1, p);
93 if (error)
94 return error;
95 }
96 return 0;
97 }
98
99 if (operation)
100 printf(_("Error writing block %lu (%s) while %s. "), block,
101 error_message(error), operation);
102 else
103 printf(_("Error writing block %lu (%s). "), block,
104 error_message(error));
105 preenhalt(ctx);
106 if (ask(ctx, _("Ignore error"), 1))
107 return 0;
108
109 return error;
110 }
111
ehandler_operation(const char * op)112 const char *ehandler_operation(const char *op)
113 {
114 const char *ret = operation;
115
116 operation = op;
117 return ret;
118 }
119
ehandler_init(io_channel channel)120 void ehandler_init(io_channel channel)
121 {
122 channel->read_error = e2fsck_handle_read_error;
123 channel->write_error = e2fsck_handle_write_error;
124 }
125