You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.2 KiB
43 lines
1.2 KiB
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <sys/stat.h>
|
|
|
|
int
|
|
main(int argc, char *argv[]) {
|
|
struct stat st;
|
|
if (argc != 3) {
|
|
fprintf(stderr, "Usage: <input filename> <output filename>\n");
|
|
return -1;
|
|
}
|
|
if (stat(argv[1], &st) != 0) {
|
|
fprintf(stderr, "Error opening file '%s': %s\n", argv[1], strerror(errno));
|
|
return -1;
|
|
}
|
|
printf("'%s' size: %lld bytes\n", argv[1], (long long)st.st_size);
|
|
if (st.st_size > 510) {
|
|
fprintf(stderr, "%lld >> 510!!\n", (long long)st.st_size);
|
|
return -1;
|
|
}
|
|
char buf[512];
|
|
memset(buf, 0, sizeof(buf));
|
|
FILE *ifp = fopen(argv[1], "rb");
|
|
int size = fread(buf, 1, st.st_size, ifp);
|
|
if (size != st.st_size) {
|
|
fprintf(stderr, "read '%s' error, size is %d.\n", argv[1], size);
|
|
return -1;
|
|
}
|
|
fclose(ifp);
|
|
buf[510] = 0x55;
|
|
buf[511] = 0xAA;
|
|
FILE *ofp = fopen(argv[2], "wb+");
|
|
size = fwrite(buf, 1, 512, ofp);
|
|
if (size != 512) {
|
|
fprintf(stderr, "write '%s' error, size is %d.\n", argv[2], size);
|
|
return -1;
|
|
}
|
|
fclose(ofp);
|
|
printf("build 512 bytes boot sector: '%s' success!\n", argv[2]);
|
|
return 0;
|
|
}
|
|
|