aboutsummaryrefslogtreecommitdiff
path: root/fs/sandbox/sandboxfs.c
blob: 1e253611c367fe2f0b2fbd8be36ce2f54f69d684 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2012, Google Inc.
 */

#include <common.h>
#include <fs.h>
#include <os.h>

int sandbox_fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
{
	/*
	 * Only accept a NULL struct blk_desc for the sandbox, which is when
	 * hostfs interface is used
	 */
	return rbdd != NULL;
}

int sandbox_fs_read_at(const char *filename, loff_t pos, void *buffer,
		       loff_t maxsize, loff_t *actread)
{
	loff_t size;
	int fd, ret;

	fd = os_open(filename, OS_O_RDONLY);
	if (fd < 0)
		return fd;
	ret = os_lseek(fd, pos, OS_SEEK_SET);
	if (ret == -1) {
		os_close(fd);
		return ret;
	}
	if (!maxsize) {
		ret = os_get_filesize(filename, &size);
		if (ret) {
			os_close(fd);
			return ret;
		}

		maxsize = size;
	}

	size = os_read(fd, buffer, maxsize);
	os_close(fd);

	if (size < 0) {
		ret = -1;
	} else {
		ret = 0;
		*actread = size;
	}

	return ret;
}

int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer,
			loff_t towrite, loff_t *actwrite)
{
	ssize_t size;
	int fd, ret;

	fd = os_open(filename, OS_O_RDWR | OS_O_CREAT);
	if (fd < 0)
		return fd;
	ret = os_lseek(fd, pos, OS_SEEK_SET);
	if (ret == -1) {
		os_close(fd);
		return ret;
	}
	size = os_write(fd, buffer, towrite);
	os_close(fd);

	if (size == -1) {
		ret = -1;
	} else {
		ret = 0;
		*actwrite = size;
	}

	return ret;
}

int sandbox_fs_ls(const char *dirname)
{
	struct os_dirent_node *head, *node;
	int ret;

	ret = os_dirent_ls(dirname, &head);
	if (ret)
		goto out;

	for (node = head; node; node = node->next) {
		printf("%s %10lu %s\n", os_dirent_get_typename(node->type),
		       node->size, node->name);
	}
out:
	os_dirent_free(head);

	return ret;
}

int sandbox_fs_exists(const char *filename)
{
	loff_t size;
	int ret;

	ret = os_get_filesize(filename, &size);
	return ret == 0;
}

int sandbox_fs_size(const char *filename, loff_t *size)
{
	return os_get_filesize(filename, size);
}

void sandbox_fs_close(void)
{
}

int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len,
		    loff_t *actread)
{
	int ret;

	ret = sandbox_fs_read_at(filename, offset, buf, len, actread);
	if (ret)
		printf("** Unable to read file %s **\n", filename);

	return ret;
}

int fs_write_sandbox(const char *filename, void *buf, loff_t offset,
		     loff_t len, loff_t *actwrite)
{
	int ret;

	ret = sandbox_fs_write_at(filename, offset, buf, len, actwrite);
	if (ret)
		printf("** Unable to write file %s **\n", filename);

	return ret;
}