161 lines
4.0 KiB
C
161 lines
4.0 KiB
C
/*-
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* Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include <string.h>
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#include <unistd.h>
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#include <lua.h>
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#include "lauxlib.h"
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#include "lposix.h"
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/*
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* Minimal implementation of luaposix needed for internal FreeBSD bits.
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*/
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static int
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lua_chmod(lua_State *L)
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{
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int n;
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const char *path;
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mode_t mode;
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n = lua_gettop(L);
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luaL_argcheck(L, n == 2, n > 2 ? 3 : n,
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"chmod takes exactly two arguments");
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path = luaL_checkstring(L, 1);
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mode = (mode_t)luaL_checkinteger(L, 2);
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if (chmod(path, mode) == -1) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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lua_pushinteger(L, errno);
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return 3;
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}
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lua_pushinteger(L, 0);
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return 1;
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}
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static int
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lua_chown(lua_State *L)
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{
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int n;
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const char *path;
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uid_t owner = (uid_t) -1;
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gid_t group = (gid_t) -1;
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n = lua_gettop(L);
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luaL_argcheck(L, n > 1, n,
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"chown takes at least two arguments");
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path = luaL_checkstring(L, 1);
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if (lua_isinteger(L, 2))
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owner = (uid_t) lua_tointeger(L, 2);
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else if (lua_isstring(L, 2)) {
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struct passwd *p = getpwnam(lua_tostring(L, 2));
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if (p != NULL)
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owner = p->pw_uid;
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else
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return (luaL_argerror(L, 2,
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lua_pushfstring(L, "unknown user %s",
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lua_tostring(L, 2))));
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} else if (!lua_isnoneornil(L, 2)) {
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const char *type = luaL_typename(L, 2);
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return (luaL_argerror(L, 2,
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lua_pushfstring(L, "integer or string expected, got %s",
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type)));
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}
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if (lua_isinteger(L, 3))
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group = (gid_t) lua_tointeger(L, 3);
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else if (lua_isstring(L, 3)) {
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struct group *g = getgrnam(lua_tostring(L, 3));
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if (g != NULL)
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group = g->gr_gid;
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else
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return (luaL_argerror(L, 3,
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lua_pushfstring(L, "unknown group %s",
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lua_tostring(L, 3))));
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} else if (!lua_isnoneornil(L, 3)) {
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const char *type = luaL_typename(L, 3);
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return (luaL_argerror(L, 3,
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lua_pushfstring(L, "integer or string expected, got %s",
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type)));
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}
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if (chown(path, owner, group) == -1) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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lua_pushinteger(L, errno);
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return (3);
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}
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lua_pushinteger(L, 0);
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return (1);
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}
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static int
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lua_getpid(lua_State *L)
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{
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int n;
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n = lua_gettop(L);
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luaL_argcheck(L, n == 0, 1, "too many arguments");
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lua_pushinteger(L, getpid());
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return 1;
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}
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#define REG_SIMPLE(n) { #n, lua_ ## n }
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static const struct luaL_Reg sys_statlib[] = {
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REG_SIMPLE(chmod),
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{ NULL, NULL },
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};
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static const struct luaL_Reg unistdlib[] = {
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REG_SIMPLE(getpid),
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REG_SIMPLE(chown),
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{ NULL, NULL },
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};
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#undef REG_SIMPLE
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int
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luaopen_posix_sys_stat(lua_State *L)
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{
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luaL_newlib(L, sys_statlib);
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return 1;
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}
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int
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luaopen_posix_unistd(lua_State *L)
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{
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luaL_newlib(L, unistdlib);
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return 1;
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}
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