static void do_daemon(const char *opt) {
if (!(opt && *opt))
die(2, "daemon requires an option (i.e. daemon=sys)");
int (*daemon_)(int,int);
if (!strcmp(opt,"sys"))
daemon_ = sys_daemon;
else if (!strcmp(opt, "ours"))
daemon_ = our_daemon;
else
die(2, "daemon: unknown option: %s", opt);
int r = daemon_(1,0);
if (r) die_errno(2, "%s daemon() failed = %d", opt, r);
}
/**
* Run daemon service
*/
void daemonize(char *port){
FNAME();
int sock = -1;
struct addrinfo hints, *res, *p;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if(getaddrinfo(NULL, port, &hints, &res) != 0){
ERR("getaddrinfo");
}
struct sockaddr_in *ia = (struct sockaddr_in*)res->ai_addr;
char str[INET_ADDRSTRLEN];
inet_ntop(AF_INET, &(ia->sin_addr), str, INET_ADDRSTRLEN);
// loop through all the results and bind to the first we can
for(p = res; p != NULL; p = p->ai_next){
if((sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1){
WARN("socket");
continue;
}
int reuseaddr = 1;
if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof(int)) == -1){
ERR("setsockopt");
}
if(bind(sock, p->ai_addr, p->ai_addrlen) == -1){
close(sock);
WARN("bind");
continue;
}
break; // if we get here, we have a successfull connection
}
if(p == NULL){
putlog("failed to bind socket, exit");
// looped off the end of the list with no successful bind
ERRX("failed to bind socket");
}
freeaddrinfo(res);
daemon_(sock);
close(sock);
putlog("socket closed, exit");
signals(0);
}
