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#include "uwsgi.h"
extern struct uwsgi_server uwsgi;
struct uwsgi_gateway *register_gateway(char *name, void (*loop) (int, void *), void *data) {
struct uwsgi_gateway *ug;
int num = 1, i;
if (ushared->gateways_cnt >= MAX_GATEWAYS) {
uwsgi_log("you can register max %d gateways\n", MAX_GATEWAYS);
return NULL;
}
for (i = 0; i < ushared->gateways_cnt; i++) {
if (!strcmp(name, ushared->gateways[i].name)) {
num++;
}
}
char *str = uwsgi_num2str(num);
char *fullname = uwsgi_concat3(name, " ", str);
free(str);
ug = &ushared->gateways[ushared->gateways_cnt];
ug->pid = 0;
ug->name = name;
ug->loop = loop;
ug->num = num;
ug->fullname = fullname;
ug->data = data;
ug->uid = 0;
ug->gid = 0;
#if defined(SOCK_SEQPACKET) && defined(__linux__)
if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, ug->internal_subscription_pipe)) {
#else
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, ug->internal_subscription_pipe)) {
#endif
uwsgi_error("socketpair()");
}
uwsgi_socket_nb(ug->internal_subscription_pipe[0]);
uwsgi_socket_nb(ug->internal_subscription_pipe[1]);
if (!uwsgi.master_process && !uwsgi.force_gateway)
gateway_respawn(ushared->gateways_cnt);
ushared->gateways_cnt++;
return ug;
}
static void gateway_brutal_end() {
_exit(UWSGI_END_CODE);
}
void gateway_respawn(int id) {
pid_t gw_pid;
struct uwsgi_gateway *ug = &ushared->gateways[id];
if (uwsgi.master_process)
uwsgi.shared->gateways_harakiri[id] = 0;
gw_pid = uwsgi_fork(ug->fullname);
if (gw_pid < 0) {
uwsgi_error("fork()");
return;
}
if (gw_pid == 0) {
uwsgi_fixup_fds(0, 0, ug);
uwsgi_close_all_unshared_sockets();
if (uwsgi.master_as_root)
uwsgi_as_root();
#ifdef __linux__
if (prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0)) {
uwsgi_error("prctl()");
}
#endif
uwsgi.mypid = getpid();
atexit(gateway_brutal_end);
signal(SIGALRM, SIG_IGN);
signal(SIGHUP, SIG_IGN);
signal(SIGINT, end_me);
signal(SIGTERM, end_me);
signal(SIGUSR1, SIG_IGN);
signal(SIGUSR2, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
signal(SIGSTOP, SIG_IGN);
signal(SIGTSTP, SIG_IGN);
uwsgi_hooks_run(uwsgi.hook_as_gateway, "as-gateway", 1);
if (ug->gid) {
uwsgi_log("%s %d setgid() to %d\n", ug->name, ug->num, (int) ug->gid);
if (setgid(ug->gid)) {
uwsgi_error("gateway_respawn()/setgid()");
exit(1);
}
}
if (ug->uid) {
uwsgi_log("%s %d setuid() to %d\n", ug->name, ug->num, (int) ug->uid);
if (setuid(ug->uid)) {
uwsgi_error("gateway_respawn()/setuid()");
exit(1);
}
}
ug->loop(id, ug->data);
// never here !!! (i hope)
exit(1);
}
ug->pid = gw_pid;
ug->respawns++;
if (ug->respawns == 1) {
uwsgi_log("spawned %s %d (pid: %d)\n", ug->name, ug->num, (int) gw_pid);
}
else {
uwsgi_log("respawned %s %d (pid: %d)\n", ug->name, ug->num, (int) gw_pid);
}
}
struct uwsgi_gateway_socket *uwsgi_new_gateway_socket(char *name, char *owner) {
struct uwsgi_gateway_socket *uwsgi_sock = uwsgi.gateway_sockets, *old_uwsgi_sock;
if (!uwsgi_sock) {
uwsgi.gateway_sockets = uwsgi_malloc(sizeof(struct uwsgi_gateway_socket));
uwsgi_sock = uwsgi.gateway_sockets;
}
else {
while (uwsgi_sock) {
old_uwsgi_sock = uwsgi_sock;
uwsgi_sock = uwsgi_sock->next;
}
uwsgi_sock = uwsgi_malloc(sizeof(struct uwsgi_gateway_socket));
old_uwsgi_sock->next = uwsgi_sock;
}
memset(uwsgi_sock, 0, sizeof(struct uwsgi_gateway_socket));
uwsgi_sock->fd = -1;
uwsgi_sock->shared = 0;
uwsgi_sock->name = name;
uwsgi_sock->name_len = strlen(name);
uwsgi_sock->owner = owner;
return uwsgi_sock;
}
struct uwsgi_gateway_socket *uwsgi_new_gateway_socket_from_fd(int fd, char *owner) {
struct uwsgi_gateway_socket *uwsgi_sock = uwsgi.gateway_sockets, *old_uwsgi_sock;
if (!uwsgi_sock) {
uwsgi.gateway_sockets = uwsgi_malloc(sizeof(struct uwsgi_gateway_socket));
uwsgi_sock = uwsgi.gateway_sockets;
}
else {
while (uwsgi_sock) {
old_uwsgi_sock = uwsgi_sock;
uwsgi_sock = uwsgi_sock->next;
}
uwsgi_sock = uwsgi_malloc(sizeof(struct uwsgi_gateway_socket));
old_uwsgi_sock->next = uwsgi_sock;
}
memset(uwsgi_sock, 0, sizeof(struct uwsgi_gateway_socket));
uwsgi_sock->fd = fd;
uwsgi_sock->name = uwsgi_getsockname(fd);
uwsgi_sock->name_len = strlen(uwsgi_sock->name);
uwsgi_sock->owner = owner;
return uwsgi_sock;
}
void uwsgi_gateway_go_cheap(char *gw_id, int queue, int *i_am_cheap) {
uwsgi_log("[%s pid %d] no more nodes available. Going cheap...\n", gw_id, (int) uwsgi.mypid);
struct uwsgi_gateway_socket *ugs = uwsgi.gateway_sockets;
while (ugs) {
if (!strcmp(ugs->owner, gw_id) && !ugs->subscription) {
event_queue_del_fd(queue, ugs->fd, event_queue_read());
}
ugs = ugs->next;
}
*i_am_cheap = 1;
}
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