-
Notifications
You must be signed in to change notification settings - Fork 0
/
binary_copy_to_single_file.c
executable file
·153 lines (86 loc) · 2.38 KB
/
binary_copy_to_single_file.c
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
143
144
145
146
147
148
149
150
151
152
153
/*
3 binaries (kernel.bin, rootfs.bin, data.bin)
|
[header] [combined]
|
[start, length, name| start ... | start ...]
image.bin
*/
#include<stdio.h>
#define HEADER_OFFSET 84
typedef struct header {
int start_addr;
int size;
char name[20];
} header_t;
int read_file_size (FILE* fd);
int make_image (FILE* kern_fp, FILE * rootfs_fp, FILE * data_fp );
int main () {
FILE * kernel_fp;
FILE * rootfs_fp;
FILE * data_fp;
FILE * image_fp;
header_t kernel_header, rootfs_header, data_header;
int kernel_sz, rootfs_sz, data_sz;
kernel_sz= rootfs_sz= data_sz=0;
kernel_fp=fopen("kernel.bin","r");
if (kernel_fp==NULL) {
return -1;
}
rootfs_fp=fopen("rootfs.bin","r");
if (rootfs_fp==NULL) {
return -1;
}
data_fp=fopen("data.bin","r");
if (data_fp==NULL) {
return -1;
}
kernel_sz=read_file_size(kernel_fp);
if (kernel_sz==0) return -1;
rootfs_sz=read_file_size(rootfs_fp);
if (rootfs_sz==0) return -1;
data_sz =read_file_size(data_fp);
if (data_sz==0)return -1;
image_fp=fopen("image.bin","a+");
if (image_fp==NULL) {
return -1;
}
kernel_header.start_addr=HEADER_OFFSET;
kernel_header.size=kernel_sz;
strcpy(kernel_header.name,"kernel.bin");
fwrite(image_fp, kernel_header, sizeof(kernel_header);
rootfs_header.start_addr=HEADER_OFFSET+kernel_sz;
rootfs_header.size=rootfs_sz;
strcpy(rootfs_header.name,"rootfs.bin");
fwrite(image_fp, rootfs_header, sizeof(rootfs_header);
data_header.start_addr=HEADER_OFFSET+kernel_sz+rootfs_sz;
data_header.size=data_sz;
strcpy(data_header.name,"data.bin");
fwrite(image_fp, data_header, sizeof(data_header);
fclose(image_fp);
make_image(kernel_fp,rootfs_fp,data_fp);
fclose (kernel_fp);
fclose (rootfs_fp);
fclose (data_fp);
return 0;
}
int read_file_size (FILE *fd) {
int length=0;
while (fgetc(fd)!=EOF) {
length++;
}
return length;
}
/*
[header] [combined]
|
[start, length, name| start ... | start ...]
*/
int make_image (FILE* kern_fp, FILE * rootfs_fp, FILE * data_fp ) {
FILE * image_fp;
header_t copy_t;
/* copy the 3 files to image_fp; */
/* stub code below */
copy 3 files
fclose (image_fp);
}