net.server_epoll: Add support for systemd socket activation
Allows creating listening sockets and accepting client connections
before Prosody starts.
This is unlike normal Prosody dynamic resource management, where ports
may added and removed at any time, and the ports defined by the config.
Weird things happen if these are closed (e.g. due to reload) so here we
prevent closing and ensure sockets are reused when opened again.
#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#endif
#include <time.h>
#include <lua.h>
static lua_Number tv2number(struct timespec *tv) {
return tv->tv_sec + tv->tv_nsec * 1e-9;
}
static int lc_time_realtime(lua_State *L) {
struct timespec t;
clock_gettime(CLOCK_REALTIME, &t);
lua_pushnumber(L, tv2number(&t));
return 1;
}
static int lc_time_monotonic(lua_State *L) {
struct timespec t;
clock_gettime(CLOCK_MONOTONIC, &t);
lua_pushnumber(L, tv2number(&t));
return 1;
}
int luaopen_prosody_util_time(lua_State *L) {
lua_createtable(L, 0, 2);
{
lua_pushcfunction(L, lc_time_realtime);
lua_setfield(L, -2, "now");
lua_pushcfunction(L, lc_time_monotonic);
lua_setfield(L, -2, "monotonic");
}
return 1;
}
int luaopen_util_time(lua_State *L) {
return luaopen_prosody_util_time(L);
}