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 if (ctx->flags & E2F_FLAG_EXITING)
37 return 0;
38 /*
39 * If more than one block was read, try reading each block
40 * separately. We could use the actual bytes read to figure
41 * out where to start, but we don't bother.
42 */
43 if (count > 1) {
44 p = (char *) data;
45 for (i=0; i < count; i++, p += channel->block_size, block++) {
46 error = io_channel_read_blk(channel, block,
47 1, p);
48 if (error)
49 return error;
50 }
51 return 0;
52 }
53 if (operation)
54 printf(_("Error reading block %lu (%s) while %s. "), block,
55 error_message(error), operation);
56 else
57 printf(_("Error reading block %lu (%s). "), block,
58 error_message(error));
59 preenhalt(ctx);
60 if (ask(ctx, _("Ignore error"), 1)) {
61 if (ask(ctx, _("Force rewrite"), 1))
62 io_channel_write_blk(channel, block, 1, data);
63 return 0;
64 }
65
66 return error;
67 }
68
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)69 static errcode_t e2fsck_handle_write_error(io_channel channel,
70 unsigned long block,
71 int count,
72 const void *data,
73 size_t size EXT2FS_ATTR((unused)),
74 int actual EXT2FS_ATTR((unused)),
75 errcode_t error)
76 {
77 int i;
78 const char *p;
79 ext2_filsys fs = (ext2_filsys) channel->app_data;
80 e2fsck_t ctx;
81
82 ctx = (e2fsck_t) fs->priv_data;
83 if (ctx->flags & E2F_FLAG_EXITING)
84 return 0;
85
86 /*
87 * If more than one block was written, try writing each block
88 * separately. We could use the actual bytes read to figure
89 * out where to start, but we don't bother.
90 */
91 if (count > 1) {
92 p = (const char *) data;
93 for (i=0; i < count; i++, p += channel->block_size, block++) {
94 error = io_channel_write_blk(channel, block,
95 1, p);
96 if (error)
97 return error;
98 }
99 return 0;
100 }
101
102 if (operation)
103 printf(_("Error writing block %lu (%s) while %s. "), block,
104 error_message(error), operation);
105 else
106 printf(_("Error writing block %lu (%s). "), block,
107 error_message(error));
108 preenhalt(ctx);
109 if (ask(ctx, _("Ignore error"), 1))
110 return 0;
111
112 return error;
113 }
114
ehandler_operation(const char * op)115 const char *ehandler_operation(const char *op)
116 {
117 const char *ret = operation;
118
119 operation = op;
120 return ret;
121 }
122
ehandler_init(io_channel channel)123 void ehandler_init(io_channel channel)
124 {
125 channel->read_error = e2fsck_handle_read_error;
126 channel->write_error = e2fsck_handle_write_error;
127 }
128