void prng_init(prng_entropy_fn fun, prng_ctx ctx[1])
{ int i;
/* clear the buffers and the counter in the context */
memset(ctx, 0, sizeof(prng_ctx));
/* set the pointer to the entropy collection function */
ctx->entropy = fun;
/* initialise the random data pool */
update_pool(ctx);
/* mix the pool a minimum number of times */
for(i = 0; i < PRNG_MIN_MIX; ++i)
prng_mix(ctx->rbuf);
/* update the pool to prime the pool output buffer */
update_pool(ctx);
}
void prng_rand(unsigned char data[], unsigned int data_len, prng_ctx ctx[1])
{ unsigned char *rp = data;
unsigned int len, pos = ctx->pos;
while(data_len)
{
/* transfer 'data_len' bytes (or the number of bytes remaining */
/* the pool output buffer if less) into the output */
len = (data_len < PRNG_POOL_SIZE - pos ? data_len : PRNG_POOL_SIZE - pos);
memcpy(rp, ctx->obuf + pos, len);
rp += len; /* update ouput buffer position pointer */
pos += len; /* update pool output buffer pointer */
data_len -= len; /* update the remaining data count */
/* refresh the random pool if necessary */
if(pos == PRNG_POOL_SIZE)
{
update_pool(ctx); pos = 0;
}
}
ctx->pos = pos;
}
/*
* Update a Pool Record in the database.
* It is always updated from the Resource record.
*
* update pool=<pool-name>
* updates pool from Pool resource
* update media pool=<pool-name> volume=<volume-name>
* changes pool info for volume
* update slots [scan=...]
* updates autochanger slots
* update stats [days=...]
* updates long term statistics
*/
int update_cmd(UAContext *ua, const char *cmd)
{
static const char *kw[] = {
NT_("media"), /* 0 */
NT_("volume"), /* 1 */
NT_("pool"), /* 2 */
NT_("slots"), /* 3 */
NT_("slot"), /* 4 */
NT_("jobid"), /* 5 */
NT_("stats"), /* 6 */
NULL};
if (!open_client_db(ua)) {
return 1;
}
switch (find_arg_keyword(ua, kw)) {
case 0:
case 1:
update_volume(ua);
return 1;
case 2:
update_pool(ua);
return 1;
case 3:
case 4:
update_slots(ua);
return 1;
case 5:
update_job(ua);
return 1;
case 6:
update_stats(ua);
return 1;
default:
break;
}
start_prompt(ua, _("Update choice:\n"));
add_prompt(ua, _("Volume parameters"));
add_prompt(ua, _("Pool from resource"));
add_prompt(ua, _("Slots from autochanger"));
add_prompt(ua, _("Long term statistics"));
switch (do_prompt(ua, _("item"), _("Choose catalog item to update"), NULL, 0)) {
case 0:
update_volume(ua);
break;
case 1:
update_pool(ua);
break;
case 2:
update_slots(ua);
break;
case 3:
update_stats(ua);
break;
default:
break;
}
return 1;
}
