mod_posix: Move everything to util.startup
This allows greater control over the order of events.
Notably, the internal ordering between daemonization, initialization of
libunbound and setup of signal handling is sensitive.
libunbound starts a separate thread for processing DNS requests.
If this thread is started before signal handling has been set up, it
will not inherit the signal handlers and instead behave as it would have
before signal handlers were set up, i.e. cause the whole process to
immediately exit.
libunbound is usually initialized on the first DNS request, usually
triggered by an outgoing s2s connection attempt.
If daemonization happens before signals have been set up, signals may
not be processed at all.
#include <lua.h>
#include <lauxlib.h>
#ifndef LUA_MAXINTEGER
#include <stdint.h>
#define LUA_MAXINTEGER PTRDIFF_MAX
#endif
static int Lcreate_table(lua_State *L) {
lua_createtable(L, luaL_checkinteger(L, 1), luaL_checkinteger(L, 2));
return 1;
}
/* COMPAT: w/ Lua pre-5.2 */
static int Lpack(lua_State *L) {
unsigned int n_args = lua_gettop(L);
lua_createtable(L, n_args, 1);
lua_insert(L, 1);
for(int arg = n_args; arg >= 1; arg--) {
lua_rawseti(L, 1, arg);
}
lua_pushinteger(L, n_args);
lua_setfield(L, -2, "n");
return 1;
}
/* COMPAT: w/ Lua pre-5.4 */
static int Lmove (lua_State *L) {
lua_Integer f = luaL_checkinteger(L, 2);
lua_Integer e = luaL_checkinteger(L, 3);
lua_Integer t = luaL_checkinteger(L, 4);
int tt = !lua_isnoneornil(L, 5) ? 5 : 1; /* destination table */
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checktype(L, tt, LUA_TTABLE);
if (e >= f) { /* otherwise, nothing to move */
lua_Integer n, i;
luaL_argcheck(L, f > 0 || e < LUA_MAXINTEGER + f, 3,
"too many elements to move");
n = e - f + 1; /* number of elements to move */
luaL_argcheck(L, t <= LUA_MAXINTEGER - n + 1, 4,
"destination wrap around");
if (t > e || t <= f || (tt != 1 && !lua_compare(L, 1, tt, LUA_OPEQ))) {
for (i = 0; i < n; i++) {
lua_rawgeti(L, 1, f + i);
lua_rawseti(L, tt, t + i);
}
} else {
for (i = n - 1; i >= 0; i--) {
lua_rawgeti(L, 1, f + i);
lua_rawseti(L, tt, t + i);
}
}
}
lua_pushvalue(L, tt); /* return destination table */
return 1;
}
int luaopen_prosody_util_table(lua_State *L) {
luaL_checkversion(L);
lua_createtable(L, 0, 2);
lua_pushcfunction(L, Lcreate_table);
lua_setfield(L, -2, "create");
lua_pushcfunction(L, Lpack);
lua_setfield(L, -2, "pack");
lua_pushcfunction(L, Lmove);
lua_setfield(L, -2, "move");
return 1;
}
int luaopen_util_table(lua_State *L) {
return luaopen_prosody_util_table(L);
}