static int
load_file(char *name, void **ptr, long *size)
{
char *buf = NULL;
int allocated = 1 * 1024 * 1024;
int len, filled = 0;
if (!grub_open (name))
return -1;
buf = malloc(allocated);
errnum = 0;
while (1) {
len = grub_read (buf + filled, allocated - filled);
if (! len) {
if (!errnum)
break;
grub_close ();
return -1;
}
filled += len;
if (filled < allocated)
break;
allocated *= 2;
buf = realloc(buf, allocated);
}
grub_close ();
*ptr = buf;
*size = filled;
return 0;
}
void
cmain (void)
{
grub_printf ("\n\nGRUB loading, please wait...\n");
/*
* Here load the true second-stage boot-loader.
*/
if (grub_open (config_file))
{
int ret;
disk_read_hook = disk_read_savesect_func;
grub_read ((char *) 0x8000, SECTOR_SIZE * 2);
disk_read_hook = NULL;
/* Sanity check: catch an internal error. */
if (saved_sector == -1)
{
grub_printf ("internal error: the second sector of Stage 2 is unknown.");
stop ();
}
ret = grub_read ((char *) 0x8000 + SECTOR_SIZE * 2, -1);
grub_close ();
if (ret)
chain_stage2 (0, 0x8200, saved_sector);
}
/*
* If not, then print error message and die.
*/
print_error ();
stop ();
}