ssh_fetch_identitylist
if ((r = ssh_fetch_identitylist(sock, &idlist)) != 0) {
int ssh_fetch_identitylist(int sock, struct ssh_identitylist **idlp);
(r = ssh_fetch_identitylist(agent_fd, &idlist)) == 0) {
if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) {
if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)
if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) {