/usr/bin/avos:AOS parse unit()

From ArchosDocs

Description

Reads the UNIT block and make sure the Product Name returned by SysInfo_GetProductName() matches the one claimed in the UNIT block. Optionally, checks that the product key returned by SYSINFO_GetPK() matches the one claimed in the UNIT block.

References To

• SysInfo_GetProductName()

The Code

int AOS_parse_unit(int fd)
{
	char pk[14]	// -0x236
	char buf[40];	// -0x228
	int read;	// -0x18
	int pos;	// -0x14
	char *ptr;	// -0x10
 
	read = _aos_read(fd, &buf, 40);
	if(read != 40)
		return 211;
 
	if(*(uint32_t *)&buf[0] != 0x554E4954 /* UNIT */)
		return 210;
 
	ptr = &buf[8];
	printf("product [%s]  marked in file [%s]\r\n",
		SysInfo_GetProductName(), ptr);
 
	if(strcmp(ptr, SysInfo_GetProductName()) != 0)
		return 212;
 
	strncpy(&pk, SYSINFO_GetPK(), 14);
	if((char)ptr[16] != 0) {
		if(strncmp(&pk, ptr[16], 14) != 0)
			return 213;
	}
 
	printf("_aos_seek 1\r\n");
 
	_aos_seek(fd, SEEK_SET, (pos + *(uint32_t *)&buf[4]));
 
	printf("_aos_seek 2\r\n");
 
	return 0;
}