1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
3 * Conky, a system monitor, based on torsmo
5 * Copyright (c) 2009 Toni Spets
6 * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 * vim: ts=4 sw=4 noet ai cindent syntax=c
32 #endif /* LUA_EXTRAS */
34 #ifdef HAVE_SYS_INOTIFY_H
35 #include <sys/inotify.h>
37 void llua_append_notify(const char *name);
38 void llua_rm_notifies(void);
39 static int llua_block_notify = 0;
40 #endif /* HAVE_SYS_INOTIFY_H */
42 static char *draw_pre = 0;
43 static char *draw_post = 0;
45 lua_State *lua_L = NULL;
47 static int llua_conky_parse(lua_State *L)
49 int n = lua_gettop(L); /* number of arguments */
51 char *buf = calloc(1, max_user_text);
53 lua_pushstring(L, "incorrect arguments, conky_parse(string) takes exactly 1 argument");
56 if (!lua_isstring(L, 1)) {
57 lua_pushstring(L, "incorrect argument (expecting a string)");
60 str = strdup(lua_tostring(L, 1));
62 lua_pushstring(L, buf);
65 return 1; /* number of results */
68 static int llua_conky_set_update_interval(lua_State *L)
70 int n = lua_gettop(L); /* number of arguments */
73 lua_pushstring(L, "incorrect arguments, conky_set_update_interval(number) takes exactly 1 argument");
76 if (!lua_isnumber(L, 1)) {
77 lua_pushstring(L, "incorrect argument (expecting a number)");
80 value = lua_tonumber(L, 1);
81 set_update_interval(value);
82 return 0; /* number of results */
87 const char *libs = PACKAGE_LIBDIR"/lib?.so;";
88 char *old_path, *new_path;
92 /* add our library path to the lua package.cpath global var */
94 lua_getglobal(lua_L, "package");
95 lua_getfield(lua_L, -1, "cpath");
96 old_path = strdup(lua_tostring(lua_L, -1));
97 new_path = malloc(strlen(old_path) + strlen(libs) + 1);
98 strcpy(new_path, libs);
99 strcat(new_path, old_path);
100 lua_pushstring(lua_L, new_path);
101 lua_setfield(lua_L, -3, "cpath");
106 lua_pushstring(lua_L, PACKAGE_NAME" "VERSION" compiled "BUILD_DATE" for "BUILD_ARCH);
107 lua_setglobal(lua_L, "conky_build_info");
109 lua_pushstring(lua_L, VERSION);
110 lua_setglobal(lua_L, "conky_version");
112 lua_pushstring(lua_L, BUILD_DATE);
113 lua_setglobal(lua_L, "conky_build_date");
115 lua_pushstring(lua_L, BUILD_ARCH);
116 lua_setglobal(lua_L, "conky_build_arch");
118 lua_pushstring(lua_L, current_config);
119 lua_setglobal(lua_L, "conky_config");
121 lua_pushcfunction(lua_L, &llua_conky_parse);
122 lua_setglobal(lua_L, "conky_parse");
124 lua_pushcfunction(lua_L, &llua_conky_set_update_interval);
125 lua_setglobal(lua_L, "conky_set_update_interval");
127 #if defined(X11) && defined(LUA_EXTRAS)
128 /* register tolua++ user types */
130 tolua_usertype(lua_L, "Drawable");
131 tolua_usertype(lua_L, "Visual");
132 tolua_usertype(lua_L, "Display");
136 void llua_load(const char *script)
139 char path[DEFAULT_TEXT_BUFFER_SIZE];
143 to_real_path(path, script);
144 error = luaL_dofile(lua_L, path);
146 ERR("llua_load: %s", lua_tostring(lua_L, -1));
148 #ifdef HAVE_SYS_INOTIFY_H
149 } else if (!llua_block_notify && inotify_fd != -1) {
150 llua_append_notify(path);
151 #endif /* HAVE_SYS_INOTIFY_H */
156 llua_do_call does a flexible call to any Lua function
157 string: <function> [par1] [par2...]
158 retc: the number of return values expected
160 char *llua_do_call(const char *string, int retc)
162 static char func[64];
165 char *tmp = strdup(string);
166 char *ptr = strtok(tmp, " ");
168 /* proceed only if the function name is present */
174 /* call only conky_ prefixed functions */
175 if(strncmp(ptr, LUAPREFIX, strlen(LUAPREFIX)) == 0) {
176 snprintf(func, 64, "%s", ptr);
178 snprintf(func, 64, "%s%s", LUAPREFIX, ptr);
181 /* push the function name to stack */
182 lua_getglobal(lua_L, func);
184 /* parse all function parameters from args and push them to the stack */
185 ptr = strtok(NULL, " ");
187 lua_pushstring(lua_L, ptr);
188 ptr = strtok(NULL, " ");
194 if(lua_pcall(lua_L, argc, retc, 0) != 0) {
195 ERR("llua_do_call: function %s execution failed: %s", func, lua_tostring(lua_L, -1));
204 * same as llua_do_call() except passes everything after func as one arg.
206 char *llua_do_read_call(const char *function, const char *arg, int retc)
208 static char func[64];
209 snprintf(func, 64, "conky_%s", function);
211 /* push the function name to stack */
212 lua_getglobal(lua_L, func);
214 /* push function parameter to the stack */
215 lua_pushstring(lua_L, arg);
217 if (lua_pcall(lua_L, 1, retc, 0) != 0) {
218 ERR("llua_do_call: function %s execution failed: %s", func, lua_tostring(lua_L, -1));
226 char *llua_getstring(const char *args)
231 if(!lua_L) return NULL;
233 func = llua_do_call(args, 1);
235 if (!lua_isstring(lua_L, -1)) {
236 ERR("llua_getstring: function %s didn't return a string, result discarded", func);
238 ret = strdup(lua_tostring(lua_L, -1));
246 char *llua_getstring_read(const char *function, const char *arg)
251 if(!lua_L) return NULL;
253 func = llua_do_read_call(function, arg, 1);
255 if(!lua_isstring(lua_L, -1)) {
256 ERR("llua_getstring_read: function %s didn't return a string, result discarded", func);
258 ret = strdup(lua_tostring(lua_L, -1));
266 int llua_getnumber(const char *args, double *ret)
272 func = llua_do_call(args, 1);
274 if(!lua_isnumber(lua_L, -1)) {
275 ERR("llua_getnumber: function %s didn't return a number, result discarded", func);
277 *ret = lua_tonumber(lua_L, -1);
285 void llua_close(void)
287 #ifdef HAVE_SYS_INOTIFY_H
289 #endif /* HAVE_SYS_INOTIFY_H */
303 #ifdef HAVE_SYS_INOTIFY_H
304 struct _lua_notify_s {
306 char name[DEFAULT_TEXT_BUFFER_SIZE];
307 struct _lua_notify_s *next;
309 static struct _lua_notify_s *lua_notifies = 0;
311 static struct _lua_notify_s *llua_notify_list_do_alloc(const char *name)
313 struct _lua_notify_s *ret = malloc(sizeof(struct _lua_notify_s));
314 memset(ret, 0, sizeof(struct _lua_notify_s));
315 strncpy(ret->name, name, DEFAULT_TEXT_BUFFER_SIZE);
319 void llua_append_notify(const char *name)
322 struct _lua_notify_s *new_tail = 0;
324 /* empty, fresh new digs */
325 new_tail = lua_notifies = llua_notify_list_do_alloc(name);
327 struct _lua_notify_s *tail = lua_notifies;
331 // should be @ the end now
332 new_tail = llua_notify_list_do_alloc(name);
333 tail->next = new_tail;
335 new_tail->wd = inotify_add_watch(inotify_fd,
340 void llua_rm_notifies(void)
343 struct _lua_notify_s *head = lua_notifies;
344 struct _lua_notify_s *next = 0;
345 if (!lua_notifies) return;
346 inotify_rm_watch(inotify_fd, head->wd);
347 if (head->next) next = head->next;
352 inotify_rm_watch(inotify_fd, head->wd);
358 void llua_inotify_query(int wd, int mask)
360 struct _lua_notify_s *head = lua_notifies;
361 if (mask & IN_MODIFY || mask & IN_IGNORED) {
362 /* for whatever reason, i keep getting IN_IGNORED when the file is
365 if (head->wd == wd) {
366 llua_block_notify = 1;
367 llua_load(head->name);
368 llua_block_notify = 0;
369 ERR("Lua script '%s' reloaded", head->name);
370 if (mask & IN_IGNORED) {
371 /* for some reason we get IN_IGNORED here
372 * sometimes, so we need to re-add the watch */
373 head->wd = inotify_add_watch(inotify_fd,
383 #endif /* HAVE_SYS_INOTIFY_H */
385 void llua_set_number(const char *key, double value)
387 lua_pushnumber(lua_L, value);
388 lua_setfield(lua_L, -2, key);
392 void llua_draw_pre_hook(void)
394 if (!lua_L || !draw_pre) return;
395 llua_do_call(draw_pre, 0);
398 void llua_draw_post_hook(void)
400 if (!lua_L || !draw_post) return;
401 llua_do_call(draw_post, 0);
404 void llua_set_draw_pre_hook(const char *args)
406 draw_pre = strdup(args);
409 void llua_set_draw_post_hook(const char *args)
411 draw_post = strdup(args);
415 void llua_set_userdata(const char *key, const char *type, void *value)
417 tolua_pushusertype(lua_L, value, type);
418 lua_setfield(lua_L, -2, key);
420 #endif /* LUA_EXTRAS */
422 void llua_setup_window_table(int text_start_x, int text_start_y, int text_width, int text_height)
427 if (output_methods & TO_X) {
429 llua_set_userdata("drawable", "Drawable", (void*)&window.drawable);
430 llua_set_userdata("visual", "Visual", window.visual);
431 llua_set_userdata("display", "Display", display);
432 #endif /* LUA_EXTRAS */
435 llua_set_number("width", window.width);
436 llua_set_number("height", window.height);
437 llua_set_number("border_inner_margin", window.border_inner_margin);
438 llua_set_number("border_outer_margin", window.border_outer_margin);
439 llua_set_number("border_width", window.border_width);
441 llua_set_number("text_start_x", text_start_x);
442 llua_set_number("text_start_y", text_start_y);
443 llua_set_number("text_width", text_width);
444 llua_set_number("text_height", text_height);
446 lua_setglobal(lua_L, "conky_window");
450 void llua_update_window_table(int text_start_x, int text_start_y, int text_width, int text_height)
454 lua_getglobal(lua_L, "conky_window");
455 if (lua_isnil(lua_L, -1)) {
456 /* window table isn't populated yet */
461 llua_set_number("width", window.width);
462 llua_set_number("height", window.height);
464 llua_set_number("text_start_x", text_start_x);
465 llua_set_number("text_start_y", text_start_y);
466 llua_set_number("text_width", text_width);
467 llua_set_number("text_height", text_height);
469 lua_setglobal(lua_L, "conky_window");
473 void llua_setup_info(struct information *i, double u_interval)
478 llua_set_number("update_interval", u_interval);
479 llua_set_number("uptime", i->uptime);
481 lua_setglobal(lua_L, "conky_info");
484 void llua_update_info(struct information *i, double u_interval)
488 lua_getglobal(lua_L, "conky_info");
489 if (lua_isnil(lua_L, -1)) {
490 /* window table isn't populated yet */
495 llua_set_number("update_interval", u_interval);
496 llua_set_number("uptime", i->uptime);
498 lua_setglobal(lua_L, "conky_info");