int
snapshot_write_file(struct volume *v, int block, char *file, uint32_t seq, uint32_t type)
{
uint32_t md5[4] = { 0 };
struct file_header hdr;
struct stat s;
char buffer[256];
int in = 0, len, offset;
int ret = -1;
if (stat(file, &s) || md5sum(file, md5)) {
ULOG_ERR("stat failed on %s\n", file);
goto out;
}
if ((block * v->block_size) + pad_file_size(v, s.st_size) > v->size) {
ULOG_ERR("upgrade is too big for the flash\n");
goto out;
}
volume_erase(v, block * v->block_size, pad_file_size(v, s.st_size));
volume_erase(v, block * v->block_size + pad_file_size(v, s.st_size), v->block_size);
hdr.length = s.st_size;
hdr.magic = OWRT;
hdr.type = type;
hdr.seq = seq;
memcpy(hdr.md5, md5, sizeof(md5));
hdr_to_be32(&hdr);
if (volume_write(v, &hdr, block * v->block_size, sizeof(struct file_header))) {
ULOG_ERR("failed to write header\n");
goto out;
}
in = open(file, O_RDONLY);
if (in < 1) {
ULOG_ERR("failed to open %s\n", file);
goto out;
}
offset = (block * v->block_size) + sizeof(struct file_header);
while ((len = read(in, buffer, sizeof(buffer))) > 0) {
if (volume_write(v, buffer, offset, len) < 0)
goto out;
offset += len;
}
ret = 0;
out:
if (in > 0)
close(in);
return ret;
}
static void change_volume(void)
{
int lim = volume_get_max();
volume_write(
widgets_preferences[0].d.thumbbar.value * lim / VOLUME_SCALE,
widgets_preferences[1].d.thumbbar.value * lim / VOLUME_SCALE);
}
