prosody
5625da6ae6b6
util-src/compat.c

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util-src/compat.c @ 12994:5625da6ae6b6

moduleapi: may: Fail early if a local session has no role assigned We expect every session to explicitly have a role assigned. Falling back to any kind of "default" role (even the user's default role) in the absence of an explicit role could open up the possibility of accidental privilege escalation.
author Matthew Wild <mwild1@gmail.com>
date Sat, 25 Mar 2023 19:38:41 +0000
parent 12976:a187600ec7d6
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cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
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1
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2 #include <lua.h>
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3 #include <lauxlib.h>
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6 static int lc_xpcall (lua_State *L) {
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7 int ret;
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8 int n_arg = lua_gettop(L);
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9 /* f, msgh, p1, p2... */
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10 luaL_argcheck(L, n_arg >= 2, 2, "value expected");
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11 lua_pushvalue(L, 1); /* f to top */
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12 lua_pushvalue(L, 2); /* msgh to top */
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13 lua_replace(L, 1); /* msgh to 1 */
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14 lua_replace(L, 2); /* f to 2 */
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15 /* msgh, f, p1, p2... */
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16 ret = lua_pcall(L, n_arg - 2, LUA_MULTRET, 1);
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17 lua_pushboolean(L, ret == 0);
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18 lua_replace(L, 1);
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19 return lua_gettop(L);
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20 }
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21
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22 int luaopen_prosody_util_compat(lua_State *L) {
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23 lua_createtable(L, 0, 2);
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24 {
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25 lua_pushcfunction(L, lc_xpcall);
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26 lua_setfield(L, -2, "xpcall");
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27 }
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28 return 1;
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29 }
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30
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31 int luaopen_util_compat(lua_State *L) {
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32 return luaopen_prosody_util_compat(L);
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33 }