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/*
* lua.c - Lua configuration management
*
* Copyright © 2008 Julien Danjou <julien@danjou.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include "common/util.h"
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#include <ev.h>
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#include <xcb/xcb.h>
#include "awesome.h"
#include "awesome-version-internal.h"
#include "ewmh.h"
#include "config.h"
#include "luaa.h"
#include "tag.h"
#include "client.h"
#include "screen.h"
#include "event.h"
#include "titlebar.h"
#include "mouse.h"
#include "layouts/tile.h"
#include "common/socket.h"
#include "common/buffer.h"
extern awesome_t globalconf;
extern const struct luaL_reg awesome_hooks_lib[];
extern const struct luaL_reg awesome_keygrabber_lib[];
extern const struct luaL_reg awesome_button_methods[];
extern const struct luaL_reg awesome_button_meta[];
extern const struct luaL_reg awesome_image_methods[];
extern const struct luaL_reg awesome_image_meta[];
extern const struct luaL_reg awesome_mouse_methods[];
extern const struct luaL_reg awesome_mouse_meta[];
extern const struct luaL_reg awesome_screen_methods[];
extern const struct luaL_reg awesome_screen_meta[];
extern const struct luaL_reg awesome_client_methods[];
extern const struct luaL_reg awesome_client_meta[];
extern const struct luaL_reg awesome_titlebar_methods[];
extern const struct luaL_reg awesome_titlebar_meta[];
extern const struct luaL_reg awesome_tag_methods[];
extern const struct luaL_reg awesome_tag_meta[];
extern const struct luaL_reg awesome_widget_methods[];
extern const struct luaL_reg awesome_widget_meta[];
extern const struct luaL_reg awesome_statusbar_methods[];
extern const struct luaL_reg awesome_statusbar_meta[];
extern const struct luaL_reg awesome_wibox_methods[];
extern const struct luaL_reg awesome_wibox_meta[];
extern const struct luaL_reg awesome_keybinding_methods[];
extern const struct luaL_reg awesome_keybinding_meta[];
static struct sockaddr_un *addr;
static ev_io csio = { .fd = -1 };
#define XDG_CONFIG_HOME_DEFAULT "/.config"
/** Get or set global mouse bindings.
* This binding will be available when you'll click on root window.
* \param L The Lua VM state.
* \return The number of element pushed on stack.
* \luastack
* \lvalue A client.
* \lparam An array of mouse button bindings objects, or nothing.
* \return The array of mouse button bindings objects of this client.
*/
static int
luaA_buttons(lua_State *L)
{
button_array_t *buttons = &globalconf.buttons;
if(lua_gettop(L) == 1)
luaA_button_array_set(L, 1, buttons);
return luaA_button_array_get(L, buttons);
}
/** Quit awesome.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_quit(lua_State *L __attribute__ ((unused)))
{
ev_unloop(globalconf.loop, 1);
return 0;
}
/** Execute another application, probably a window manager, to replace
* awesome.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam The command line to execute.
*/
static int
luaA_exec(lua_State *L)
{
const char *cmd = luaL_checkstring(L, 1);
awesome_atexit();
a_exec(cmd);
return 0;
}
/** Restart awesome.
*/
static int
luaA_restart(lua_State *L __attribute__ ((unused)))
{
awesome_restart();
return 0;
}
/** Set default font. (DEPRECATED)
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam A string with a font name in Pango format.
*/
static int
luaA_font_set(lua_State *L)
{
deprecate(L);
if(lua_gettop(L) == 1)
{
const char *newfont = luaL_checkstring(L, 1);
draw_font_delete(&globalconf.font);
globalconf.font = draw_font_new(newfont);
}
char *font = pango_font_description_to_string(globalconf.font->desc);
lua_pushstring(L, font);
g_free(font);
return 0;
}
/** Get configuration file path used by awesome.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lreturn The awesome configuration file path.
*/
static int
luaA_conffile(lua_State *L)
{
lua_pushstring(L, globalconf.conffile);
return 1;
}
/** Set default colors.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam A table with `fg' and `bg' elements, containing colors.
* \lreturn A table with `fg' and `bg' elements, containing colors.
*/
static int
luaA_colors(lua_State *L)
{
if(lua_gettop(L) == 1)
{
const char *buf;
size_t len;
int8_t colors_nbr = -1, i;
xcolor_init_request_t reqs[2];
luaA_checktable(L, 1);
if((buf = luaA_getopt_lstring(L, 1, "fg", NULL, &len)))
reqs[++colors_nbr] = xcolor_init_unchecked(&globalconf.colors.fg, buf, len);
if((buf = luaA_getopt_lstring(L, 1, "bg", NULL, &len)))
reqs[++colors_nbr] = xcolor_init_unchecked(&globalconf.colors.bg, buf, len);
for(i = 0; i <= colors_nbr; i++)
xcolor_init_reply(reqs[i]);
}
lua_newtable(L);
luaA_pushcolor(L, &globalconf.colors.fg);
lua_setfield(L, -2, "fg");
luaA_pushcolor(L, &globalconf.colors.bg);
lua_setfield(L, -2, "bg");
return 1;
}
/** Set default colors. (DEPRECATED)
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*
* \luastack
* \lparam A table with `fg' and `bg' elements, containing colors.
*/
static int
luaA_colors_set(lua_State *L)
{
deprecate(L);
return luaA_colors(L);
}
static void
luaA_openlib(lua_State *L, const char *name,
const struct luaL_reg methods[],
const struct luaL_reg meta[])
{
luaL_newmetatable(L, name); /* 1 */
lua_pushvalue(L, -1); /* dup metatable 2 */
lua_setfield(L, -2, "__index"); /* metatable.__index = metatable 1 */
luaL_register(L, NULL, meta); /* 1 */
luaL_register(L, name, methods); /* 2 */
lua_pushvalue(L, -1); /* dup self as metatable 3 */
lua_setmetatable(L, -2); /* set self as metatable 2 */
lua_pop(L, 2);
}
/** UTF-8 aware string length computing.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_mbstrlen(lua_State *L)
{
const char *cmd = luaL_checkstring(L, 1);
lua_pushnumber(L, mbstowcs(NULL, NONULL(cmd), 0));
return 1;
}
/** Overload standard Lua next function to use __next key on metatable.
* \param L The Lua VM state.
* \param The number of elements pushed on stack.
*/
static int
luaAe_next(lua_State *L)
{
if(luaL_getmetafield(L, 1, "__next"))
{
lua_insert(L, 1);
lua_call(L, lua_gettop(L) - 1, LUA_MULTRET);
return lua_gettop(L);
}
luaL_checktype(L, 1, LUA_TTABLE);
lua_settop(L, 2);
if(lua_next(L, 1))
return 2;
lua_pushnil(L);
return 1;
}
/** Overload lua_next() function by using __next metatable field
* to get next elements.
* \param L The Lua VM stack.
* \param idx The index number of elements in stack.
* \return 1 if more elements to come, 0 otherwise.
*/
int
luaA_next(lua_State *L, int idx)
{
if(luaL_getmetafield(L, idx, "__next"))
{
/* if idx is relative, reduce it since we got __next */
if(idx < 0) idx--;
/* copy table and then move key */
lua_pushvalue(L, idx);
lua_pushvalue(L, -3);
lua_remove(L, -4);
lua_pcall(L, 2, 2, 0);
/* next returned nil, it's the end */
if(lua_isnil(L, -1))
{
/* remove nil */
lua_pop(L, 2);
return 0;
}
return 1;
}
return lua_next(L, idx);
}
/** Generic pairs function.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_generic_pairs(lua_State *L)
{
lua_pushvalue(L, lua_upvalueindex(1)); /* return generator, */
lua_pushvalue(L, 1); /* state, */
lua_pushnil(L); /* and initial value */
return 3;
}
/** Overload standard pairs function to use __pairs field of metatables.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaAe_pairs(lua_State *L)
{
if(luaL_getmetafield(L, 1, "__pairs"))
{
lua_insert(L, 1);
lua_call(L, lua_gettop(L) - 1, LUA_MULTRET);
return lua_gettop(L);
}
luaL_checktype(L, 1, LUA_TTABLE);
return luaA_generic_pairs(L);
}
static int
luaA_ipairs_aux(lua_State *L)
{
int i = luaL_checkint(L, 2) + 1;
luaL_checktype(L, 1, LUA_TTABLE);
lua_pushinteger(L, i);
lua_rawgeti(L, 1, i);
return (lua_isnil(L, -1)) ? 0 : 2;
}
/** Overload standard ipairs function to use __ipairs field of metatables.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaAe_ipairs(lua_State *L)
{
if(luaL_getmetafield(L, 1, "__ipairs"))
{
lua_insert(L, 1);
lua_call(L, lua_gettop(L) - 1, LUA_MULTRET);
return lua_gettop(L);
}
luaL_checktype(L, 1, LUA_TTABLE);
lua_pushvalue(L, lua_upvalueindex(1));
lua_pushvalue(L, 1);
lua_pushinteger(L, 0); /* and initial value */
return 3;
}
/** Replace various standards Lua functions with our own.
* \param L The Lua VM state.
*/
static void
luaA_fixups(lua_State *L)
{
/* replace string.len */
lua_getglobal(L, "string");
lua_pushcfunction(L, luaA_mbstrlen);
lua_setfield(L, -2, "len");
lua_pop(L, 1);
/* replace next */
lua_pushliteral(L, "next");
lua_pushcfunction(L, luaAe_next);
lua_settable(L, LUA_GLOBALSINDEX);
/* replace pairs */
lua_pushliteral(L, "pairs");
lua_pushcfunction(L, luaAe_next);
lua_pushcclosure(L, luaAe_pairs, 1); /* pairs get next as upvalue */
lua_settable(L, LUA_GLOBALSINDEX);
/* replace ipairs */
lua_pushliteral(L, "ipairs");
lua_pushcfunction(L, luaA_ipairs_aux);
lua_pushcclosure(L, luaAe_ipairs, 1);
lua_settable(L, LUA_GLOBALSINDEX);
}
/** __next function for wtable objects.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_wtable_next(lua_State *L)
{
/* upvalue 1 is content table */
if(lua_next(L, lua_upvalueindex(1)))
return 2;
lua_pushnil(L);
return 1;
}
/** __ipairs function for wtable objects.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_wtable_ipairs(lua_State *L)
{
/* push ipairs_aux */
lua_pushvalue(L, lua_upvalueindex(2));
/* push content table */
lua_pushvalue(L, lua_upvalueindex(1));
lua_pushinteger(L, 0); /* and initial value */
return 3;
}
/** Index function of wtable objects.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_wtable_index(lua_State *L)
{
size_t len;
const char *buf;
lua_pushvalue(L, 2);
/* check for size, waiting lua 5.2 and __len on tables */
if((buf = lua_tolstring(L, -1, &len)))
if(a_tokenize(buf, len) == A_TK_LEN)
{
lua_pushnumber(L, lua_objlen(L, lua_upvalueindex(1)));
return 1;
}
lua_pop(L, 1);
/* upvalue 1 is content table */
lua_rawget(L, lua_upvalueindex(1));
return 1;
}
/** Newndex function of wtable objects.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_wtable_newindex(lua_State *L)
{
bool invalid = false;
/* push key on top */
lua_pushvalue(L, 2);
/* get current key value in content table */
lua_rawget(L, lua_upvalueindex(1));
/* if value is a widget, notify change */
if(lua_istable(L, -1) || luaA_toudata(L, -1, "widget"))
invalid = true;
lua_pop(L, 1); /* remove value */
/* if new value is a widget or a table */
if(lua_istable(L, 3))
{
luaA_table2wtable(L);
invalid = true;
}
else if(!invalid && luaA_toudata(L, 3, "widget"))
invalid = true;
/* upvalue 1 is content table */
lua_rawset(L, lua_upvalueindex(1));
if(invalid)
luaA_wibox_invalidate_byitem(L, lua_topointer(L, 1));
return 0;
}
/** Convert the top element of the stack to a proxied wtable.
* \param L The Lua VM state.
*/
void
luaA_table2wtable(lua_State *L)
{
if(!lua_istable(L, -1))
return;
lua_newtable(L); /* create *real* content table */
lua_newtable(L); /* metatable */
lua_pushvalue(L, -2); /* copy content table */
lua_pushcfunction(L, luaA_ipairs_aux); /* push ipairs aux */
lua_pushcclosure(L, luaA_wtable_ipairs, 2);
lua_pushvalue(L, -3); /* copy content table */
lua_pushcclosure(L, luaA_wtable_next, 1); /* __next has the content table as upvalue */
lua_pushvalue(L, -4); /* copy content table */
lua_pushcclosure(L, luaA_wtable_index, 1); /* __index has the content table as upvalue */
lua_pushvalue(L, -5); /* copy content table */
lua_pushcclosure(L, luaA_wtable_newindex, 1); /* __newindex has the content table as upvalue */
/* set metatable field with just pushed closure */
lua_setfield(L, -5, "__newindex");
lua_setfield(L, -4, "__index");
lua_setfield(L, -3, "__next");
lua_setfield(L, -2, "__ipairs");
/* set metatable impossible to touch */
lua_pushliteral(L, "wtable");
lua_setfield(L, -2, "__metatable");
/* set new metatable on original table */
lua_setmetatable(L, -3);
/* initial key */
lua_pushnil(L);
/* go through original table */
while(lua_next(L, -3))
{
/* if convert value to wtable */
luaA_table2wtable(L);
/* copy key */
lua_pushvalue(L, -2);
/* move key before value */
lua_insert(L, -2);
/* set same value in content table */
lua_rawset(L, -4);
/* copy key */
lua_pushvalue(L, -1);
/* push the new value :-> */
lua_pushnil(L);
/* set orig[k] = nil */
lua_rawset(L, -5);
}
/* remove content table */
lua_pop(L, 1);
}
/** Look for an item: table, function, etc.
* \param L The Lua VM state.
* \param item The pointer item.
*/
bool
luaA_hasitem(lua_State *L, const void *item)
{
lua_pushnil(L);
while(luaA_next(L, -2))
{
if(lua_topointer(L, -1) == item)
{
/* remove value and key */
lua_pop(L, 2);
return true;
}
if(lua_istable(L, -1))
if(luaA_hasitem(L, item))
{
/* remove key and value */
lua_pop(L, 2);
return true;
}
/* remove value */
lua_pop(L, 1);
}
return false;
}
/** Check if a table is a loop. When using table as direct acyclic digram,
* this is useful.
* \param L The Lua VM state.
* \param idx The index of the table in the stack
* \return True if the table loops.
*/
bool
luaA_isloop(lua_State *L, int idx)
{
if(lua_istable(L, idx))
{
lua_pushvalue(L, idx); /* push table on top */
if(luaA_hasitem(L, lua_topointer(L, -1)))
{
lua_pop(L, 1); /* remove pushed table */
return true;
}
lua_pushnil(L);
while(luaA_next(L, -2))
{
/* check for recursivity */
if(luaA_isloop(L, -1))
{
lua_pop(L, 2); /* remove key and value */
return true;
}
lua_pop(L, 1); /* remove value */
}
lua_pop(L, 1); /* remove pushed table */
}
return false;
}
/** Object table.
* This table can use safely object as key.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
int
luaA_otable_index(lua_State *L)
{
void **obj, **v;
if((obj = lua_touserdata(L, 2)))
{
/* begins at nil */
lua_pushnil(L);
while(lua_next(L, 1))
{
/* check the key against the key if the key is a userdata,
* otherwise check it again the value. */
if((v = lua_touserdata(L, -2))
&& *v == *obj)
/* return value */
return 1;
else if((v = lua_touserdata(L, -1))
&& *v == *obj)
{
/* return key */
lua_pop(L, 1);
return 1;
}
/* removes 'value'; keeps 'key' for next iteration */
lua_pop(L, 1);
}
return 0;
}
lua_rawget(L, 1);
return 1;
}
/** Object table.
* This table can use safely object as key.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_otable_newindex(lua_State *L)
{
void **obj, **v;
if((obj = lua_touserdata(L, 2)))
{
/* begins at nil */
lua_pushnil(L);
while(lua_next(L, 1))
{
if((v = lua_touserdata(L, -2))
&& *v == *obj)
{
/* remove value */
lua_pop(L, 1);
/* push new value on top */
lua_pushvalue(L, 3);
/* set in table key = value */
lua_rawset(L, 1);
return 0;
}
/* removes 'value'; keeps 'key' for next iteration */
lua_pop(L, 1);
}
}
lua_rawset(L, 1);
return 0;
}
/** Spawn a program.
* This function is multi-head (Zaphod) aware and will set display to
* the right screen according to mouse position.
* \param L The Lua VM state.
* \return The number of elements pushed on stack
* \luastack
* \lparam The command to launch.
* \lparam The optional screen number to spawn the command on.
*/
static int
luaA_spawn(lua_State *L)
{
char *host, newdisplay[128];
const char *cmd;
int screen = 0, screenp, displayp;
if(lua_gettop(L) == 2)
{
screen = luaL_checknumber(L, 2) - 1;
luaA_checkscreen(screen);
}
cmd = luaL_checkstring(L, 1);
if(!globalconf.xinerama_is_active)
{
xcb_parse_display(NULL, &host, &displayp, &screenp);
snprintf(newdisplay, sizeof(newdisplay), "%s:%d.%d", host, displayp, screen);
setenv("DISPLAY", newdisplay, 1);
p_delete(&host);
}
/* The double-fork construct avoids zombie processes and keeps the code
* clean from stupid signal handlers. */
if(fork() == 0)
{
if(fork() == 0)
{
if(globalconf.connection)
xcb_disconnect(globalconf.connection);
setsid();
a_exec(cmd);
warn("execl '%s' failed: %s\n", cmd, strerror(errno));
}
exit(EXIT_SUCCESS);
}
wait(0);
return 0;
}
/** Deprecated function, does nothing.
*/
static int
luaA_mouse_add(lua_State *L)
{
deprecate(L);
return 0;
}
/** awesome global table.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_awesome_index(lua_State *L)
{
if(luaA_usemetatable(L, 1, 2))
return 1;
size_t len;
const char *buf = luaL_checklstring(L, 2, &len);
switch(a_tokenize(buf, len))
{
case A_TK_FONT:
{
char *font = pango_font_description_to_string(globalconf.font->desc);
lua_pushstring(L, font);
g_free(font);
}
break;
default:
return 0;
}
return 1;
}
/** Newindex function for the awesome global table.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_awesome_newindex(lua_State *L)
{
if(luaA_usemetatable(L, 1, 2))
return 1;
size_t len;
const char *buf = luaL_checklstring(L, 2, &len);
switch(a_tokenize(buf, len))
{
case A_TK_FONT:
{
const char *newfont = luaL_checkstring(L, 3);
draw_font_delete(&globalconf.font);
globalconf.font = draw_font_new(newfont);
}
break;
default:
return 0;
}
return 0;
}
/** Initialize the Lua VM
*/
void
luaA_init(void)
{
lua_State *L;
static const struct luaL_reg otable_methods[] =
{
{ "__call", luaA_otable_new },
{ NULL, NULL }
};
static const struct luaL_reg otable_meta[] =
{
{ "__index", luaA_otable_index },
{ "__newindex", luaA_otable_newindex },
{ NULL, NULL }
};
static const struct luaL_reg awesome_lib[] =
{
{ "quit", luaA_quit },
{ "exec", luaA_exec },
{ "spawn", luaA_spawn },
{ "restart", luaA_restart },
{ "buttons", luaA_buttons },
{ "font_set", luaA_font_set },
{ "colors_set", luaA_colors_set },
{ "colors", luaA_colors },
{ "conffile", luaA_conffile },
{ "__index", luaA_awesome_index },
{ "__newindex", luaA_awesome_newindex },
/* deprecated */
{ "mouse_add", luaA_mouse_add },
{ NULL, NULL }
};
L = globalconf.L = luaL_newstate();
luaL_openlibs(L);
luaA_fixups(L);
/* Export awesome lib */
luaA_openlib(L, "awesome", awesome_lib, awesome_lib);
/* Export hooks lib */
luaL_register(L, "hooks", awesome_hooks_lib);
/* Export keygrabber lib */
luaL_register(L, "keygrabber", awesome_keygrabber_lib);
/* Export otable lib */
luaA_openlib(L, "otable", otable_methods, otable_meta);
/* Export screen */
luaA_openlib(L, "screen", awesome_screen_methods, awesome_screen_meta);
/* Export mouse */
luaA_openlib(L, "mouse", awesome_mouse_methods, awesome_mouse_meta);
/* Export button */
luaA_openlib(L, "button", awesome_button_methods, awesome_button_meta);
/* Export image */
luaA_openlib(L, "image", awesome_image_methods, awesome_image_meta);
/* Export tag */
luaA_openlib(L, "tag", awesome_tag_methods, awesome_tag_meta);
/* Export statusbar */
luaA_openlib(L, "statusbar", awesome_statusbar_methods, awesome_statusbar_meta);
/* Export wibox */
luaA_openlib(L, "wibox", awesome_wibox_methods, awesome_wibox_meta);
/* Export widget */
luaA_openlib(L, "widget", awesome_widget_methods, awesome_widget_meta);
/* Export client */
luaA_openlib(L, "client", awesome_client_methods, awesome_client_meta);
/* Export titlebar */
luaA_openlib(L, "titlebar", awesome_titlebar_methods, awesome_titlebar_meta);
/* Export keys */
luaA_openlib(L, "keybinding", awesome_keybinding_methods, awesome_keybinding_meta);
lua_pushliteral(L, "AWESOME_VERSION");
lua_pushstring(L, AWESOME_VERSION);
lua_settable(L, LUA_GLOBALSINDEX);
lua_pushliteral(L, "AWESOME_RELEASE");
lua_pushstring(L, AWESOME_RELEASE);
lua_settable(L, LUA_GLOBALSINDEX);
/* init hooks */
globalconf.hooks.manage = LUA_REFNIL;
globalconf.hooks.unmanage = LUA_REFNIL;
globalconf.hooks.focus = LUA_REFNIL;
globalconf.hooks.unfocus = LUA_REFNIL;
globalconf.hooks.mouse_enter = LUA_REFNIL;
globalconf.hooks.arrange = LUA_REFNIL;
globalconf.hooks.clients = LUA_REFNIL;
globalconf.hooks.tags = LUA_REFNIL;
globalconf.hooks.tagged = LUA_REFNIL;
globalconf.hooks.property = LUA_REFNIL;
globalconf.hooks.timer = LUA_REFNIL;
/* add Lua lib path (/usr/share/awesome/lib by default) */
luaA_dostring(L, "package.path = package.path .. \";" AWESOME_LUA_LIB_PATH "/?.lua\"");
luaA_dostring(L, "package.path = package.path .. \";" AWESOME_LUA_LIB_PATH "/?/init.lua\"");
/* add XDG_CONFIG_DIR (/etc/xdg/awesome by default) as include path */
luaA_dostring(L, "package.path = package.path .. \";" XDG_CONFIG_DIR "/awesome/?.lua\"");
luaA_dostring(L, "package.path = package.path .. \";" XDG_CONFIG_DIR "/awesome/?/init.lua\"");
/* add either XDG_CONFIG_HOME/awesome or HOME/.config/awesome to path */
char *dir;
if((dir = getenv("XDG_CONFIG_HOME")))
{
char *path;
a_asprintf(&path, "package.path = package.path .. \";%s/awesome/?.lua;%s/awesome/?/init.lua\"", dir, dir);
luaA_dostring(globalconf.L, path);
p_delete(&path);
}
else
{
char *path, *homedir = getenv("HOME");
a_asprintf(&path,
"package.path = package.path .. \";%s" XDG_CONFIG_HOME_DEFAULT "/awesome/?.lua;%s" XDG_CONFIG_HOME_DEFAULT "/awesome/?/init.lua\"",
homedir, homedir);
luaA_dostring(globalconf.L, path);
p_delete(&path);
}
/* add XDG_CONFIG_DIRS to include paths */
char *xdg_config_dirs = getenv("XDG_CONFIG_DIRS");
ssize_t len;
if((len = a_strlen(xdg_config_dirs)))
{
char **buf, **xdg_files = a_strsplit(xdg_config_dirs, len, ':');
for(buf = xdg_files; *buf; buf++)
{
char *confpath;
a_asprintf(&confpath, "package.path = package.path .. \";%s/awesome/?.lua;%s/awesome/?/init.lua\"",
*buf, *buf);
luaA_dostring(globalconf.L, confpath);
p_delete(&confpath);
}
for(buf = xdg_files; *buf; buf++)
p_delete(buf);
p_delete(&xdg_files);
}
}
#define AWESOME_CONFIG_FILE "/awesome/rc.lua"
static bool
luaA_loadrc(const char *confpath, bool run)
{
if(confpath)
{
if(!luaL_loadfile(globalconf.L, confpath))
{
if(run)
{
if(lua_pcall(globalconf.L, 0, LUA_MULTRET, 0))
fprintf(stderr, "%s\n", lua_tostring(globalconf.L, -1));
else
{
globalconf.conffile = a_strdup(confpath);
return true;
}
}
else
lua_pop(globalconf.L, 1);
return true;
}
else
fprintf(stderr, "%s\n", lua_tostring(globalconf.L, -1));
}
return false;
}
/** Load a configuration file.
* \param confpatharg The configuration file to load.
* \param run Run the configuration file.
*/
bool
luaA_parserc(const char *confpatharg, bool run)
{
int screen;
const char *confdir, *xdg_config_dirs;
char *confpath = NULL, **xdg_files = NULL, **buf;
ssize_t len;
bool ret = false;
/* try to load, return if it's ok */
if(luaA_loadrc(confpatharg, run))
{
ret = true;
goto bailout;
}
if((confdir = getenv("XDG_CONFIG_HOME")))
a_asprintf(&confpath, "%s" AWESOME_CONFIG_FILE, confdir);
else
a_asprintf(&confpath, "%s" XDG_CONFIG_HOME_DEFAULT AWESOME_CONFIG_FILE, getenv("HOME"));
/* try to run XDG_CONFIG_HOME/awesome/rc.lua */
if(luaA_loadrc(confpath, run))
{
ret = true;
goto bailout;
}
p_delete(&confpath);
xdg_config_dirs = getenv("XDG_CONFIG_DIRS");
if(!(len = a_strlen(xdg_config_dirs)))
{
xdg_config_dirs = XDG_CONFIG_DIR;
len = sizeof(XDG_CONFIG_DIR) - 1;
}
xdg_files = a_strsplit(xdg_config_dirs, len, ':');
for(buf = xdg_files; *buf && !ret; buf++)
{
a_asprintf(&confpath, "%s" AWESOME_CONFIG_FILE, *buf);
if(luaA_loadrc(confpath, run))
{
ret = true;
goto bailout;
}
p_delete(&confpath);
}
bailout:
p_delete(&confpath);
if(xdg_files)
{
for(buf = xdg_files; *buf; buf++)
p_delete(buf);
p_delete(&xdg_files);
}
/* Assure there's at least one tag */
for(screen = 0; screen < globalconf.nscreen; screen++)
if(!globalconf.screens[screen].tags.len)
tag_append_to_screen(tag_new("default", sizeof("default") - 1, layout_tile, 0.5, 1, 0),
&globalconf.screens[screen]);
return ret;
}
/** Parse a command.
* \param cmd The buffer to parse.
* \return the number of elements pushed on the stack by the last statement in cmd.
* If there's an error, the message is pushed onto the stack and this returns 1.
*/
static int
luaA_docmd(const char *cmd)
{
char *p;
int newtop, oldtop = lua_gettop(globalconf.L);
while((p = strchr(cmd, '\n')))
{
newtop = lua_gettop(globalconf.L);
lua_pop(globalconf.L, newtop - oldtop);
oldtop = newtop;
*p = '\0';
if (luaL_dostring(globalconf.L, cmd))
{
warn("error executing Lua code: %s", lua_tostring(globalconf.L, -1));
return 1;
}
cmd = p + 1;
}
return lua_gettop(globalconf.L) - oldtop;
}
/** Pushes a Lua array containing the top n elements of the stack.
* \param n The number of elements to put in the array.
*/
static void
luaA_array(int n)
{
int i;
lua_createtable(globalconf.L, n, 0);
lua_insert(globalconf.L, -n - 1);
for (i = n; i > 0; i--)
lua_rawseti(globalconf.L, -i - 1, i);
}
/** Maps the top n elements of the stack to the result of
* applying a function to that element.
* \param n The number of elements to map.
* \luastack
* \lparam The function to map the elements by. This should be
* at position -(n + 1).
*/
static void
luaA_map(int n)
{
int i;
for (i = 0; i < n; i++)
{
lua_pushvalue(globalconf.L, -n - 1); /* copy of the function */
lua_pushvalue(globalconf.L, -n - 1); /* value to map */
lua_pcall(globalconf.L, 1, 1, 0); /* call function */
lua_remove(globalconf.L, -n - 1); /* remove old value */
}
lua_remove(globalconf.L, -n - 1); /* remove function */
}
static void luaA_conn_cleanup(EV_P_ ev_io *w)
{
ev_ref(EV_DEFAULT_UC);
ev_io_stop(EV_DEFAULT_UC_ w);
if (close(w->fd))
warn("error closing UNIX domain socket: %s", strerror(errno));
p_delete(&w);
}
static void
luaA_cb(EV_P_ ev_io *w, int revents)
{
char buf[1024];
int r, els;
const char *s;
size_t len;
switch(r = recv(w->fd, buf, sizeof(buf)-1, MSG_TRUNC))
{
case -1:
warn("error reading UNIX domain socket: %s", strerror(errno));
case 0: /* 0 bytes are only transferred when the connection is closed */
luaA_conn_cleanup(EV_DEFAULT_UC_ w);
break;
default:
if(r >= ssizeof(buf))
break;
buf[r] = '\0';
lua_getglobal(globalconf.L, "table");
lua_getfield(globalconf.L, -1, "concat");
lua_remove(globalconf.L, -2); /* remove table */
lua_getglobal(globalconf.L, "tostring");
els = luaA_docmd(buf);
luaA_map(els); /* map results to strings */
luaA_array(els); /* put strings in an array */
lua_pushstring(globalconf.L, "\t");
lua_pcall(globalconf.L, 2, 1, 0); /* concatenate results with tabs */
s = lua_tolstring(globalconf.L, -1, &len);
/* ignore ENOENT because the client may not read */
if (send(w->fd, s, len, MSG_DONTWAIT) == -1)
switch(errno)
{
case ENOENT:
case EAGAIN:
break;
default:
warn("can't send back to client via domain socket: %s", strerror(errno));
break;
}
lua_pop(globalconf.L, 1); /* pop the string */
}
awesome_refresh(globalconf.connection);
}
static void
luaA_conn_cb(EV_P_ ev_io *w, int revents)
{
ev_io *csio_conn = p_new(ev_io, 1);
int csfd = accept(w->fd, NULL, NULL);
ev_io_init(csio_conn, &luaA_cb, csfd, EV_READ);
ev_io_start(EV_DEFAULT_UC_ csio_conn);
ev_unref(EV_DEFAULT_UC);
}
void
luaA_cs_init(void)
{
int csfd = socket_getclient();
if (csfd < 0 || fcntl(csfd, F_SETFD, FD_CLOEXEC) == -1)
return;
addr = socket_getaddr(getenv("DISPLAY"));
if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
{
if(errno == EADDRINUSE)
{
if(unlink(addr->sun_path))
warn("error unlinking existing file: %s", strerror(errno));
if(bind(csfd, (const struct sockaddr *) addr, SUN_LEN(addr)))
return warn("error binding UNIX domain socket: %s", strerror(errno));
}
else
return warn("error binding UNIX domain socket: %s", strerror(errno));
}
listen(csfd, 10);
ev_io_init(&csio, &luaA_conn_cb, csfd, EV_READ);
ev_io_start(EV_DEFAULT_UC_ &csio);
ev_unref(EV_DEFAULT_UC);
}
void
luaA_cs_cleanup(void)
{
if(csio.fd < 0)
return;
ev_ref(EV_DEFAULT_UC);
ev_io_stop(EV_DEFAULT_UC_ &csio);
if (close(csio.fd))
warn("error closing UNIX domain socket: %s", strerror(errno));
if(unlink(addr->sun_path))
warn("error unlinking UNIX domain socket: %s", strerror(errno));
p_delete(&addr);
csio.fd = -1;
}
void
luaA_on_timer(EV_P_ ev_timer *w, int revents)
{
luaA_dofunction(globalconf.L, globalconf.hooks.timer, 0, 0);
awesome_refresh(globalconf.connection);
}
/** Push a color as a string onto the stack
* \param L The Lua VM state.
* \param c The color to push.
* \return The number of elements pushed on stack.
*/
int
luaA_pushcolor(lua_State *L, const xcolor_t *c)
{
uint8_t r = (unsigned)c->red * 0xff / 0xffff;
uint8_t g = (unsigned)c->green * 0xff / 0xffff;
uint8_t b = (unsigned)c->blue * 0xff / 0xffff;
uint8_t a = (unsigned)c->alpha * 0xff / 0xffff;
char s[10];
int len;
/* do not print alpha if it's full */
if(a == 0xff)
len = snprintf(s, sizeof(s), "#%02x%02x%02x", r, g, b);
else
len = snprintf(s, sizeof(s), "#%02x%02x%02x%02x", r, g, b, a);
lua_pushlstring(L, s, len);
return 1;
}
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