[mirror_lxc.git] / src / lua-lxc / core.c

/*
 * lua-lxc: lua bindings for lxc
 *
 * Copyright © 2012 Oracle.
 *
 * Authors:
 * Dwight Engen <dwight.engen@oracle.com>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.

 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.

 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#define LUA_LIB
#define _GNU_SOURCE
#include <lua.h>
#include <lauxlib.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <libgen.h>
#include <lxc/lxccontainer.h>
#include <lxc/commands.h>

#if LUA_VERSION_NUM < 502
#define luaL_newlib(L,l) (lua_newtable(L), luaL_register(L,NULL,l))
#define luaL_setfuncs(L,l,n) (assert(n==0), luaL_register(L,NULL,l))
#define luaL_checkunsigned(L,n) luaL_checknumber(L,n)
#endif

#ifdef NO_CHECK_UDATA
#define checkudata(L,i,tname)	lua_touserdata(L, i)
#else
#define checkudata(L,i,tname)	luaL_checkudata(L, i, tname)
#endif

#define lua_boxpointer(L,u) \
    (*(void **) (lua_newuserdata(L, sizeof(void *))) = (u))

#define lua_unboxpointer(L,i,tname) \
    (*(void **) (checkudata(L, i, tname)))

#define CONTAINER_TYPENAME	"lxc.container"

static int container_new(lua_State *L)
{
    struct lxc_container *c;
    const char *name = luaL_checkstring(L, 1);
    const char *configpath = NULL;
    int argc = lua_gettop(L);

    if (argc > 1)
	configpath = luaL_checkstring(L, 2);

    c = lxc_container_new(name, configpath);
    if (c) {
	lua_boxpointer(L, c);
	luaL_getmetatable(L, CONTAINER_TYPENAME);
	lua_setmetatable(L, -2);
    } else {
	lua_pushnil(L);
    }
    return 1;
}

static int container_gc(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    /* XXX what to do if this fails? */
    lxc_container_put(c);
    return 0;
}

static int container_config_file_name(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    char *config_file_name;

    config_file_name = c->config_file_name(c);
    lua_pushstring(L, config_file_name);
    free(config_file_name);
    return 1;
}

static int container_defined(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushboolean(L, !!c->is_defined(c));
    return 1;
}

static int container_name(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushstring(L, c->name);
    return 1;
}

static int container_create(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    char *template_name = strdupa(luaL_checkstring(L, 2));
    int argc = lua_gettop(L);
    char **argv;
    int i;

    argv = alloca((argc+1) * sizeof(char *));
    for (i = 0; i < argc-2; i++)
	argv[i] = strdupa(luaL_checkstring(L, i+3));
    argv[i] = NULL;

    lua_pushboolean(L, !!c->create(c, template_name, NULL, NULL, 0, argv));
    return 1;
}

static int container_destroy(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushboolean(L, !!c->destroy(c));
    return 1;
}

/* container state */
static int container_start(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    int argc = lua_gettop(L);
    char **argv = NULL;
    int i,j;
    int useinit = 0;

    if (argc > 1) {
	argv = alloca((argc+1) * sizeof(char *));
	for (i = 0, j = 0; i < argc-1; i++) {
	    const char *arg = luaL_checkstring(L, i+2);

	    if (!strcmp(arg, "useinit"))
		useinit = 1;
	    else
		argv[j++] = strdupa(arg);
	}
	argv[j] = NULL;
    }

    c->want_daemonize(c);
    lua_pushboolean(L, !!c->start(c, useinit, argv));
    return 1;
}

static int container_stop(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushboolean(L, !!c->stop(c));
    return 1;
}

static int container_shutdown(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    int timeout = luaL_checkinteger(L, 2);

    lua_pushboolean(L, !!c->shutdown(c, timeout));
    return 1;
}

static int container_wait(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *state = luaL_checkstring(L, 2);
    int timeout = luaL_checkinteger(L, 3);

    lua_pushboolean(L, !!c->wait(c, state, timeout));
    return 1;
}

static int container_freeze(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushboolean(L, !!c->freeze(c));
    return 1;
}

static int container_unfreeze(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushboolean(L, !!c->unfreeze(c));
    return 1;
}

static int container_running(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushboolean(L, !!c->is_running(c));
    return 1;
}

static int container_state(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushstring(L, c->state(c));
    return 1;
}

static int container_init_pid(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);

    lua_pushinteger(L, c->init_pid(c));
    return 1;
}

/* configuration file methods */
static int container_load_config(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    int arg_cnt = lua_gettop(L);
    const char *alt_path = NULL;

    if (arg_cnt > 1)
	alt_path = luaL_checkstring(L, 2);

    lua_pushboolean(L, !!c->load_config(c, alt_path));
    return 1;
}

static int container_save_config(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    int arg_cnt = lua_gettop(L);
    const char *alt_path = NULL;

    if (arg_cnt > 1)
	alt_path = luaL_checkstring(L, 2);

    lua_pushboolean(L, !!c->save_config(c, alt_path));
    return 1;
}

static int container_get_config_path(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *config_path;

    config_path = c->get_config_path(c);
    lua_pushstring(L, config_path);
    return 1;
}

static int container_set_config_path(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *config_path = luaL_checkstring(L, 2);

    lua_pushboolean(L, !!c->set_config_path(c, config_path));
    return 1;
}

static int container_clear_config_item(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *key = luaL_checkstring(L, 2);

    lua_pushboolean(L, !!c->clear_config_item(c, key));
    return 1;
}

static int container_get_cgroup_item(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *key = luaL_checkstring(L, 2);
    int len;
    char *value;

    len = c->get_cgroup_item(c, key, NULL, 0);
    if (len <= 0)
	goto not_found;

    value = alloca(sizeof(char)*len + 1);
    if (c->get_cgroup_item(c, key, value, len + 1) != len)
	goto not_found;

    lua_pushstring(L, value);
    return 1;

not_found:
    lua_pushnil(L);
    return 1;
}

static int container_get_config_item(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *key = luaL_checkstring(L, 2);
    int len;
    char *value;

    len = c->get_config_item(c, key, NULL, 0);
    if (len <= 0)
	goto not_found;

    value = alloca(sizeof(char)*len + 1);
    if (c->get_config_item(c, key, value, len + 1) != len)
	goto not_found;

    lua_pushstring(L, value);
    return 1;

not_found:
    lua_pushnil(L);
    return 1;
}

static int container_set_cgroup_item(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *key = luaL_checkstring(L, 2);
    const char *value = luaL_checkstring(L, 3);

    lua_pushboolean(L, !!c->set_cgroup_item(c, key, value));
    return 1;
}

static int container_set_config_item(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *key = luaL_checkstring(L, 2);
    const char *value = luaL_checkstring(L, 3);

    lua_pushboolean(L, !!c->set_config_item(c, key, value));
    return 1;
}

static int container_get_keys(lua_State *L)
{
    struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
    const char *key = NULL;
    int len;
    char *value;
    int arg_cnt = lua_gettop(L);

    if (arg_cnt > 1)
	key = luaL_checkstring(L, 2);

    len = c->get_keys(c, key, NULL, 0);
    if (len <= 0)
	goto not_found;

    value = alloca(sizeof(char)*len + 1);
    if (c->get_keys(c, key, value, len + 1) != len)
	goto not_found;

    lua_pushstring(L, value);
    return 1;

not_found:
    lua_pushnil(L);
    return 1;
}

static luaL_Reg lxc_container_methods[] =
{
    {"create",			container_create},
    {"defined",			container_defined},
    {"destroy",			container_destroy},
    {"init_pid",		container_init_pid},
    {"name",			container_name},
    {"running",			container_running},
    {"state",			container_state},
    {"freeze",			container_freeze},
    {"unfreeze",		container_unfreeze},
    {"start",			container_start},
    {"stop",			container_stop},
    {"shutdown",		container_shutdown},
    {"wait",			container_wait},

    {"config_file_name",	container_config_file_name},
    {"load_config",		container_load_config},
    {"save_config",		container_save_config},
    {"get_cgroup_item",		container_get_cgroup_item},
    {"set_cgroup_item",		container_set_cgroup_item},
    {"get_config_path",		container_get_config_path},
    {"set_config_path",		container_set_config_path},
    {"get_config_item",		container_get_config_item},
    {"set_config_item",		container_set_config_item},
    {"clear_config_item",	container_clear_config_item},
    {"get_keys",		container_get_keys},
    {NULL, NULL}
};

static int lxc_version_get(lua_State *L) {
    lua_pushstring(L, VERSION);
    return 1;
}

static int lxc_default_config_path_get(lua_State *L) {
    const char *lxcpath = lxc_get_default_config_path();

    lua_pushstring(L, lxcpath);
    return 1;
}

static int cmd_get_config_item(lua_State *L)
{
    int arg_cnt = lua_gettop(L);
    const char *name = luaL_checkstring(L, 1);
    const char *key = luaL_checkstring(L, 2);
    const char *lxcpath = NULL;
    char *value;

    if (arg_cnt > 2)
	lxcpath = luaL_checkstring(L, 3);

    value = lxc_cmd_get_config_item(name, key, lxcpath);
    if (!value)
	goto not_found;

    lua_pushstring(L, value);
    return 1;

not_found:
    lua_pushnil(L);
    return 1;
}

/* utility functions */
static int lxc_util_usleep(lua_State *L) {
    usleep((useconds_t)luaL_checkunsigned(L, 1));
    return 0;
}

static int lxc_util_dirname(lua_State *L) {
    char *path = strdupa(luaL_checkstring(L, 1));
    lua_pushstring(L, dirname(path));
    return 1;
}

static luaL_Reg lxc_lib_methods[] = {
    {"version_get",		lxc_version_get},
    {"default_config_path_get",	lxc_default_config_path_get},
    {"cmd_get_config_item",	cmd_get_config_item},
    {"container_new",		container_new},
    {"usleep",			lxc_util_usleep},
    {"dirname",			lxc_util_dirname},
    {NULL, NULL}
};

static int lxc_lib_uninit(lua_State *L) {
    (void) L;
    /* this is where we would fini liblxc.so if we needed to */
    return 0;
}

LUALIB_API int luaopen_lxc_core(lua_State *L) {
    /* this is where we would initialize liblxc.so if we needed to */

    luaL_newlib(L, lxc_lib_methods);

    lua_newuserdata(L, 0);
    lua_newtable(L);  /* metatable */
    lua_pushvalue(L, -1);
    lua_pushliteral(L, "__gc");
    lua_pushcfunction(L, lxc_lib_uninit);
    lua_rawset(L, -3);
    lua_setmetatable(L, -3);
    lua_rawset(L, -3);

    luaL_newmetatable(L, CONTAINER_TYPENAME);
    luaL_setfuncs(L, lxc_container_methods, 0);
    lua_pushvalue(L, -1);  /* push metatable */
    lua_pushstring(L, "__gc");
    lua_pushcfunction(L, container_gc);
    lua_settable(L, -3);
    lua_setfield(L, -2, "__index");  /* metatable.__index = metatable */
    lua_pop(L, 1);
    return 1;
}
Commit	Line	Data
f080ffd7 DE	1	/*
	2	* lua-lxc: lua bindings for lxc
	3	*
	4	* Copyright © 2012 Oracle.
	5	*
	6	* Authors:
	7	* Dwight Engen <dwight.engen@oracle.com>
	8	*
c66e9b01 SH	9	* This library is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU Lesser General Public
	11	* License as published by the Free Software Foundation; either
	12	* version 2.1 of the License, or (at your option) any later version.
	13
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* Lesser General Public License for more details.
	18
	19	* You should have received a copy of the GNU Lesser General Public
	20	* License along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
f080ffd7 DE	22	*/
	23
	24	#define LUA_LIB
	25	#define _GNU_SOURCE
	26	#include <lua.h>
	27	#include <lauxlib.h>
44a80d67	28	#include <assert.h>
f080ffd7	29	#include <string.h>
ac825528	30	#include <unistd.h>
c25c2970	31	#include <libgen.h>
f080ffd7	32	#include <lxc/lxccontainer.h>
8585f204	33	#include <lxc/commands.h>
f080ffd7	34
44a80d67 NC	35	#if LUA_VERSION_NUM < 502
	36	#define luaL_newlib(L,l) (lua_newtable(L), luaL_register(L,NULL,l))
	37	#define luaL_setfuncs(L,l,n) (assert(n==0), luaL_register(L,NULL,l))
ac825528	38	#define luaL_checkunsigned(L,n) luaL_checknumber(L,n)
44a80d67 NC	39	#endif
44a80d67 NC	40
f080ffd7 DE	41	#ifdef NO_CHECK_UDATA
	42	#define checkudata(L,i,tname) lua_touserdata(L, i)
	43	#else
	44	#define checkudata(L,i,tname) luaL_checkudata(L, i, tname)
	45	#endif
	46
	47	#define lua_boxpointer(L,u) \
	48	((void ) (lua_newuserdata(L, sizeof(void ))) = (u))
	49
	50	#define lua_unboxpointer(L,i,tname) \
	51	((void *) (checkudata(L, i, tname)))
	52
	53	#define CONTAINER_TYPENAME "lxc.container"
	54
	55	static int container_new(lua_State *L)
	56	{
83c98d82	57	struct lxc_container *c;
f080ffd7	58	const char *name = luaL_checkstring(L, 1);
83c98d82 DE	59	const char *configpath = NULL;
	60	int argc = lua_gettop(L);
	61
	62	if (argc > 1)
	63	configpath = luaL_checkstring(L, 2);
f080ffd7	64
83c98d82	65	c = lxc_container_new(name, configpath);
f080ffd7 DE	66	if (c) {
	67	lua_boxpointer(L, c);
	68	luaL_getmetatable(L, CONTAINER_TYPENAME);
	69	lua_setmetatable(L, -2);
	70	} else {
	71	lua_pushnil(L);
	72	}
	73	return 1;
	74	}
	75
	76	static int container_gc(lua_State *L)
	77	{
	78	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	79
	80	/* XXX what to do if this fails? */
	81	lxc_container_put(c);
	82	return 0;
	83	}
	84
	85	static int container_config_file_name(lua_State *L)
	86	{
	87	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	88	char *config_file_name;
	89
	90	config_file_name = c->config_file_name(c);
	91	lua_pushstring(L, config_file_name);
	92	free(config_file_name);
	93	return 1;
	94	}
	95
	96	static int container_defined(lua_State *L)
	97	{
	98	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	99
	100	lua_pushboolean(L, !!c->is_defined(c));
	101	return 1;
	102	}
	103
	104	static int container_name(lua_State *L)
	105	{
	106	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	107
	108	lua_pushstring(L, c->name);
	109	return 1;
	110	}
	111
	112	static int container_create(lua_State *L)
	113	{
	114	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	115	char *template_name = strdupa(luaL_checkstring(L, 2));
	116	int argc = lua_gettop(L);
	117	char **argv;
	118	int i;
	119
	120	argv = alloca((argc+1) * sizeof(char *));
	121	for (i = 0; i < argc-2; i++)
	122	argv[i] = strdupa(luaL_checkstring(L, i+3));
	123	argv[i] = NULL;
	124
dc23c1c8	125	lua_pushboolean(L, !!c->create(c, template_name, NULL, NULL, 0, argv));
f080ffd7 DE	126	return 1;
	127	}
	128
	129	static int container_destroy(lua_State *L)
	130	{
	131	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	132
	133	lua_pushboolean(L, !!c->destroy(c));
	134	return 1;
	135	}
	136
	137	/* container state */
	138	static int container_start(lua_State *L)
	139	{
	140	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	141	int argc = lua_gettop(L);
	142	char **argv = NULL;
	143	int i,j;
	144	int useinit = 0;
	145
	146	if (argc > 1) {
	147	argv = alloca((argc+1) * sizeof(char *));
	148	for (i = 0, j = 0; i < argc-1; i++) {
	149	const char *arg = luaL_checkstring(L, i+2);
	150
	151	if (!strcmp(arg, "useinit"))
	152	useinit = 1;
	153	else
	154	argv[j++] = strdupa(arg);
	155	}
	156	argv[j] = NULL;
	157	}
	158
	159	c->want_daemonize(c);
	160	lua_pushboolean(L, !!c->start(c, useinit, argv));
	161	return 1;
	162	}
	163
	164	static int container_stop(lua_State *L)
	165	{
	166	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	167
	168	lua_pushboolean(L, !!c->stop(c));
	169	return 1;
	170	}
	171
	172	static int container_shutdown(lua_State *L)
	173	{
	174	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	175	int timeout = luaL_checkinteger(L, 2);
	176
	177	lua_pushboolean(L, !!c->shutdown(c, timeout));
	178	return 1;
	179	}
	180
	181	static int container_wait(lua_State *L)
	182	{
	183	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	184	const char *state = luaL_checkstring(L, 2);
	185	int timeout = luaL_checkinteger(L, 3);
	186
	187	lua_pushboolean(L, !!c->wait(c, state, timeout));
	188	return 1;
	189	}
190
191	static int container_freeze(lua_State *L)
192	{
193	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
194
195	lua_pushboolean(L, !!c->freeze(c));
196	return 1;
197	}
198
199	static int container_unfreeze(lua_State *L)
200	{
201	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
202
203	lua_pushboolean(L, !!c->unfreeze(c));
204	return 1;
205	}
206
207	static int container_running(lua_State *L)
208	{
209	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
210
211	lua_pushboolean(L, !!c->is_running(c));
212	return 1;
213	}
214
215	static int container_state(lua_State *L)
216	{
217	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
218
219	lua_pushstring(L, c->state(c));
220	return 1;
221	}
222
223	static int container_init_pid(lua_State *L)
224	{
225	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
226
227	lua_pushinteger(L, c->init_pid(c));
228	return 1;
229	}
230
231	/* configuration file methods */
232	static int container_load_config(lua_State *L)
233	{
234	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
235	int arg_cnt = lua_gettop(L);
236	const char *alt_path = NULL;
237
238	if (arg_cnt > 1)
239	alt_path = luaL_checkstring(L, 2);
240
241	lua_pushboolean(L, !!c->load_config(c, alt_path));
242	return 1;
243	}
244
245	static int container_save_config(lua_State *L)
246	{
247	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
248	int arg_cnt = lua_gettop(L);
249	const char *alt_path = NULL;
250
251	if (arg_cnt > 1)
252	alt_path = luaL_checkstring(L, 2);
253
254	lua_pushboolean(L, !!c->save_config(c, alt_path));
255	return 1;
256	}
257
83c98d82 DE	258	static int container_get_config_path(lua_State *L)
	259	{
	260	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	261	const char *config_path;
	262
	263	config_path = c->get_config_path(c);
	264	lua_pushstring(L, config_path);
	265	return 1;
	266	}
	267
	268	static int container_set_config_path(lua_State *L)
	269	{
	270	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	271	const char *config_path = luaL_checkstring(L, 2);
	272
	273	lua_pushboolean(L, !!c->set_config_path(c, config_path));
	274	return 1;
	275	}
	276
f080ffd7 DE	277	static int container_clear_config_item(lua_State *L)
	278	{
	279	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	280	const char *key = luaL_checkstring(L, 2);
	281
	282	lua_pushboolean(L, !!c->clear_config_item(c, key));
	283	return 1;
	284	}
	285
80ee2228 DE	286	static int container_get_cgroup_item(lua_State *L)
	287	{
	288	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	289	const char *key = luaL_checkstring(L, 2);
	290	int len;
	291	char *value;
	292
	293	len = c->get_cgroup_item(c, key, NULL, 0);
	294	if (len <= 0)
	295	goto not_found;
	296
	297	value = alloca(sizeof(char)*len + 1);
	298	if (c->get_cgroup_item(c, key, value, len + 1) != len)
	299	goto not_found;
	300
	301	lua_pushstring(L, value);
	302	return 1;
	303
	304	not_found:
	305	lua_pushnil(L);
	306	return 1;
	307	}
	308
f080ffd7 DE	309	static int container_get_config_item(lua_State *L)
	310	{
	311	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	312	const char *key = luaL_checkstring(L, 2);
	313	int len;
	314	char *value;
	315
	316	len = c->get_config_item(c, key, NULL, 0);
	317	if (len <= 0)
	318	goto not_found;
	319
	320	value = alloca(sizeof(char)*len + 1);
	321	if (c->get_config_item(c, key, value, len + 1) != len)
	322	goto not_found;
	323
	324	lua_pushstring(L, value);
	325	return 1;
	326
	327	not_found:
	328	lua_pushnil(L);
	329	return 1;
	330	}
	331
80ee2228 DE	332	static int container_set_cgroup_item(lua_State *L)
	333	{
	334	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	335	const char *key = luaL_checkstring(L, 2);
	336	const char *value = luaL_checkstring(L, 3);
	337
	338	lua_pushboolean(L, !!c->set_cgroup_item(c, key, value));
	339	return 1;
	340	}
	341
f080ffd7 DE	342	static int container_set_config_item(lua_State *L)
	343	{
	344	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	345	const char *key = luaL_checkstring(L, 2);
	346	const char *value = luaL_checkstring(L, 3);
	347
	348	lua_pushboolean(L, !!c->set_config_item(c, key, value));
	349	return 1;
	350	}
	351
	352	static int container_get_keys(lua_State *L)
	353	{
	354	struct lxc_container *c = lua_unboxpointer(L, 1, CONTAINER_TYPENAME);
	355	const char *key = NULL;
	356	int len;
	357	char *value;
	358	int arg_cnt = lua_gettop(L);
	359
	360	if (arg_cnt > 1)
	361	key = luaL_checkstring(L, 2);
	362
	363	len = c->get_keys(c, key, NULL, 0);
	364	if (len <= 0)
	365	goto not_found;
	366
	367	value = alloca(sizeof(char)*len + 1);
	368	if (c->get_keys(c, key, value, len + 1) != len)
	369	goto not_found;
	370
	371	lua_pushstring(L, value);
	372	return 1;
	373
	374	not_found:
	375	lua_pushnil(L);
	376	return 1;
	377	}
	378
	379	static luaL_Reg lxc_container_methods[] =
	380	{
	381	{"create", container_create},
	382	{"defined", container_defined},
	383	{"destroy", container_destroy},
	384	{"init_pid", container_init_pid},
	385	{"name", container_name},
	386	{"running", container_running},
	387	{"state", container_state},
	388	{"freeze", container_freeze},
	389	{"unfreeze", container_unfreeze},
	390	{"start", container_start},
	391	{"stop", container_stop},
	392	{"shutdown", container_shutdown},
	393	{"wait", container_wait},
	394
	395	{"config_file_name", container_config_file_name},
	396	{"load_config", container_load_config},
	397	{"save_config", container_save_config},
80ee2228 DE	398	{"get_cgroup_item", container_get_cgroup_item},
80ee2228 DE	399	{"set_cgroup_item", container_set_cgroup_item},
83c98d82 DE	400	{"get_config_path", container_get_config_path},
83c98d82 DE	401	{"set_config_path", container_set_config_path},
f080ffd7 DE	402	{"get_config_item", container_get_config_item},
	403	{"set_config_item", container_set_config_item},
	404	{"clear_config_item", container_clear_config_item},
	405	{"get_keys", container_get_keys},
	406	{NULL, NULL}
	407	};
	408
	409	static int lxc_version_get(lua_State *L) {
	410	lua_pushstring(L, VERSION);
	411	return 1;
	412	}
	413
83c98d82	414	static int lxc_default_config_path_get(lua_State *L) {
67e571de	415	const char *lxcpath = lxc_get_default_config_path();
2a59a681	416
2a59a681	417	lua_pushstring(L, lxcpath);
f080ffd7 DE	418	return 1;
	419	}
	420
8585f204 DE	421	static int cmd_get_config_item(lua_State *L)
	422	{
	423	int arg_cnt = lua_gettop(L);
	424	const char *name = luaL_checkstring(L, 1);
	425	const char *key = luaL_checkstring(L, 2);
	426	const char *lxcpath = NULL;
	427	char *value;
	428
	429	if (arg_cnt > 2)
	430	lxcpath = luaL_checkstring(L, 3);
	431
	432	value = lxc_cmd_get_config_item(name, key, lxcpath);
	433	if (!value)
	434	goto not_found;
	435
	436	lua_pushstring(L, value);
	437	return 1;
	438
	439	not_found:
	440	lua_pushnil(L);
	441	return 1;
	442	}
	443
ac825528 NC	444	/* utility functions */
	445	static int lxc_util_usleep(lua_State *L) {
	446	usleep((useconds_t)luaL_checkunsigned(L, 1));
	447	return 0;
	448	}
	449
c25c2970 NC	450	static int lxc_util_dirname(lua_State *L) {
	451	char *path = strdupa(luaL_checkstring(L, 1));
	452	lua_pushstring(L, dirname(path));
	453	return 1;
	454	}
	455
f080ffd7 DE	456	static luaL_Reg lxc_lib_methods[] = {
f080ffd7 DE	457	{"version_get", lxc_version_get},
83c98d82	458	{"default_config_path_get", lxc_default_config_path_get},
8585f204	459	{"cmd_get_config_item", cmd_get_config_item},
f080ffd7	460	{"container_new", container_new},
ac825528	461	{"usleep", lxc_util_usleep},
c25c2970	462	{"dirname", lxc_util_dirname},
f080ffd7 DE	463	{NULL, NULL}
	464	};
	465
	466	static int lxc_lib_uninit(lua_State *L) {
	467	(void) L;
	468	/* this is where we would fini liblxc.so if we needed to */
	469	return 0;
	470	}
	471
	472	LUALIB_API int luaopen_lxc_core(lua_State *L) {
	473	/* this is where we would initialize liblxc.so if we needed to */
	474
44a80d67	475	luaL_newlib(L, lxc_lib_methods);
f080ffd7 DE	476
	477	lua_newuserdata(L, 0);
	478	lua_newtable(L); /* metatable */
	479	lua_pushvalue(L, -1);
	480	lua_pushliteral(L, "__gc");
	481	lua_pushcfunction(L, lxc_lib_uninit);
	482	lua_rawset(L, -3);
	483	lua_setmetatable(L, -3);
	484	lua_rawset(L, -3);
	485
	486	luaL_newmetatable(L, CONTAINER_TYPENAME);
44a80d67	487	luaL_setfuncs(L, lxc_container_methods, 0);
f080ffd7 DE	488	lua_pushvalue(L, -1); /* push metatable */
	489	lua_pushstring(L, "__gc");
	490	lua_pushcfunction(L, container_gc);
	491	lua_settable(L, -3);
	492	lua_setfield(L, -2, "__index"); /* metatable.__index = metatable */
f080ffd7 DE	493	lua_pop(L, 1);
	494	return 1;
	495	}