ehandler.c revision d45b67c5f2a66597d8e2915052e180203a9193b8 
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
21static const char *operation;
22
23static 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	if (ask(ctx, _("Ignore error"), 1)) {
62		if (ask(ctx, _("Force rewrite"), 1))
63			io_channel_write_blk64(channel, block, count, data);
64		return 0;
65	}
66
67	return error;
68}
69
70static errcode_t e2fsck_handle_write_error(io_channel channel,
71					    unsigned long block,
72					    int count,
73					    const void *data,
74					    size_t size EXT2FS_ATTR((unused)),
75					    int actual EXT2FS_ATTR((unused)),
76					    errcode_t error)
77{
78	int		i;
79	const char	*p;
80	ext2_filsys fs = (ext2_filsys) channel->app_data;
81	e2fsck_t ctx;
82
83	ctx = (e2fsck_t) fs->priv_data;
84	if (ctx->flags & E2F_FLAG_EXITING)
85		return 0;
86
87	/*
88	 * If more than one block was written, try writing each block
89	 * separately.  We could use the actual bytes read to figure
90	 * out where to start, but we don't bother.
91	 */
92	if (count > 1) {
93		p = (const char *) data;
94		for (i=0; i < count; i++, p += channel->block_size, block++) {
95			error = io_channel_write_blk64(channel, block,
96						     1, p);
97			if (error)
98				return error;
99		}
100		return 0;
101	}
102
103	if (operation)
104		printf(_("Error writing block %lu (%s) while %s.  "), block,
105		       error_message(error), operation);
106	else
107		printf(_("Error writing block %lu (%s).  "), block,
108		       error_message(error));
109	preenhalt(ctx);
110	if (ask(ctx, _("Ignore error"), 1))
111		return 0;
112
113	return error;
114}
115
116const char *ehandler_operation(const char *op)
117{
118	const char *ret = operation;
119
120	operation = op;
121	return ret;
122}
123
124void ehandler_init(io_channel channel)
125{
126	channel->read_error = e2fsck_handle_read_error;
127	channel->write_error = e2fsck_handle_write_error;
128}
129