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_hook = 0;
43 static char *draw_post_hook = 0;
44 static char *startup_hook = 0;
45 static char *shutdown_hook = 0;
47 lua_State *lua_L = NULL;
49 static int llua_conky_parse(lua_State *L)
51 int n = lua_gettop(L); /* number of arguments */
53 char *buf = calloc(1, max_user_text);
55 lua_pushstring(L, "incorrect arguments, conky_parse(string) takes exactly 1 argument");
58 if (!lua_isstring(L, 1)) {
59 lua_pushstring(L, "incorrect argument (expecting a string)");
62 str = strdup(lua_tostring(L, 1));
64 lua_pushstring(L, buf);
67 return 1; /* number of results */
70 static int llua_conky_set_update_interval(lua_State *L)
72 int n = lua_gettop(L); /* number of arguments */
75 lua_pushstring(L, "incorrect arguments, conky_set_update_interval(number) takes exactly 1 argument");
78 if (!lua_isnumber(L, 1)) {
79 lua_pushstring(L, "incorrect argument (expecting a number)");
82 value = lua_tonumber(L, 1);
83 set_update_interval(value);
84 return 0; /* number of results */
89 const char *libs = PACKAGE_LIBDIR"/lib?.so;";
90 char *old_path, *new_path;
94 /* add our library path to the lua package.cpath global var */
96 lua_getglobal(lua_L, "package");
97 lua_getfield(lua_L, -1, "cpath");
98 old_path = strdup(lua_tostring(lua_L, -1));
99 new_path = malloc(strlen(old_path) + strlen(libs) + 1);
100 strcpy(new_path, libs);
101 strcat(new_path, old_path);
102 lua_pushstring(lua_L, new_path);
103 lua_setfield(lua_L, -3, "cpath");
108 lua_pushstring(lua_L, PACKAGE_NAME" "VERSION" compiled "BUILD_DATE" for "BUILD_ARCH);
109 lua_setglobal(lua_L, "conky_build_info");
111 lua_pushstring(lua_L, VERSION);
112 lua_setglobal(lua_L, "conky_version");
114 lua_pushstring(lua_L, BUILD_DATE);
115 lua_setglobal(lua_L, "conky_build_date");
117 lua_pushstring(lua_L, BUILD_ARCH);
118 lua_setglobal(lua_L, "conky_build_arch");
120 lua_pushstring(lua_L, current_config);
121 lua_setglobal(lua_L, "conky_config");
123 lua_pushcfunction(lua_L, &llua_conky_parse);
124 lua_setglobal(lua_L, "conky_parse");
126 lua_pushcfunction(lua_L, &llua_conky_set_update_interval);
127 lua_setglobal(lua_L, "conky_set_update_interval");
129 #if defined(X11) && defined(LUA_EXTRAS)
130 /* register tolua++ user types */
132 tolua_usertype(lua_L, "Drawable");
133 tolua_usertype(lua_L, "Visual");
134 tolua_usertype(lua_L, "Display");
138 void llua_load(const char *script)
141 char path[DEFAULT_TEXT_BUFFER_SIZE];
145 to_real_path(path, script);
146 error = luaL_dofile(lua_L, path);
148 NORM_ERR("llua_load: %s", lua_tostring(lua_L, -1));
150 #ifdef HAVE_SYS_INOTIFY_H
151 } else if (!llua_block_notify && inotify_fd != -1) {
152 llua_append_notify(path);
153 #endif /* HAVE_SYS_INOTIFY_H */
158 llua_do_call does a flexible call to any Lua function
159 string: <function> [par1] [par2...]
160 retc: the number of return values expected
162 char *llua_do_call(const char *string, int retc)
164 static char func[64];
167 char *tmp = strdup(string);
168 char *ptr = strtok(tmp, " ");
170 /* proceed only if the function name is present */
176 /* call only conky_ prefixed functions */
177 if(strncmp(ptr, LUAPREFIX, strlen(LUAPREFIX)) == 0) {
178 snprintf(func, 64, "%s", ptr);
180 snprintf(func, 64, "%s%s", LUAPREFIX, ptr);
183 /* push the function name to stack */
184 lua_getglobal(lua_L, func);
186 /* parse all function parameters from args and push them to the stack */
187 ptr = strtok(NULL, " ");
189 lua_pushstring(lua_L, ptr);
190 ptr = strtok(NULL, " ");
196 if(lua_pcall(lua_L, argc, retc, 0) != 0) {
197 NORM_ERR("llua_do_call: function %s execution failed: %s", func, lua_tostring(lua_L, -1));
206 * same as llua_do_call() except passes everything after func as one arg.
208 char *llua_do_read_call(const char *function, const char *arg, int retc)
210 static char func[64];
211 snprintf(func, 64, "conky_%s", function);
213 /* push the function name to stack */
214 lua_getglobal(lua_L, func);
216 /* push function parameter to the stack */
217 lua_pushstring(lua_L, arg);
219 if (lua_pcall(lua_L, 1, retc, 0) != 0) {
220 NORM_ERR("llua_do_call: function %s execution failed: %s", func, lua_tostring(lua_L, -1));
228 char *llua_getstring(const char *args)
233 if(!lua_L) return NULL;
235 func = llua_do_call(args, 1);
237 if (!lua_isstring(lua_L, -1)) {
238 NORM_ERR("llua_getstring: function %s didn't return a string, result discarded", func);
240 ret = strdup(lua_tostring(lua_L, -1));
248 char *llua_getstring_read(const char *function, const char *arg)
253 if(!lua_L) return NULL;
255 func = llua_do_read_call(function, arg, 1);
257 if(!lua_isstring(lua_L, -1)) {
258 NORM_ERR("llua_getstring_read: function %s didn't return a string, result discarded", func);
260 ret = strdup(lua_tostring(lua_L, -1));
268 int llua_getnumber(const char *args, double *ret)
274 func = llua_do_call(args, 1);
276 if(!lua_isnumber(lua_L, -1)) {
277 NORM_ERR("llua_getnumber: function %s didn't return a number, result discarded", func);
279 *ret = lua_tonumber(lua_L, -1);
287 void llua_close(void)
289 #ifdef HAVE_SYS_INOTIFY_H
291 #endif /* HAVE_SYS_INOTIFY_H */
296 if (draw_post_hook) {
297 free(draw_post_hook);
305 #ifdef HAVE_SYS_INOTIFY_H
306 struct _lua_notify_s {
308 char name[DEFAULT_TEXT_BUFFER_SIZE];
309 struct _lua_notify_s *next;
311 static struct _lua_notify_s *lua_notifies = 0;
313 static struct _lua_notify_s *llua_notify_list_do_alloc(const char *name)
315 struct _lua_notify_s *ret = malloc(sizeof(struct _lua_notify_s));
316 memset(ret, 0, sizeof(struct _lua_notify_s));
317 strncpy(ret->name, name, DEFAULT_TEXT_BUFFER_SIZE);
321 void llua_append_notify(const char *name)
324 struct _lua_notify_s *new_tail = 0;
326 /* empty, fresh new digs */
327 new_tail = lua_notifies = llua_notify_list_do_alloc(name);
329 struct _lua_notify_s *tail = lua_notifies;
333 // should be @ the end now
334 new_tail = llua_notify_list_do_alloc(name);
335 tail->next = new_tail;
337 new_tail->wd = inotify_add_watch(inotify_fd,
342 void llua_rm_notifies(void)
345 struct _lua_notify_s *head = lua_notifies;
346 struct _lua_notify_s *next = 0;
347 if (!lua_notifies) return;
348 inotify_rm_watch(inotify_fd, head->wd);
349 if (head->next) next = head->next;
354 inotify_rm_watch(inotify_fd, head->wd);
360 void llua_inotify_query(int wd, int mask)
362 struct _lua_notify_s *head = lua_notifies;
363 if (mask & IN_MODIFY || mask & IN_IGNORED) {
364 /* for whatever reason, i keep getting IN_IGNORED when the file is
367 if (head->wd == wd) {
368 llua_block_notify = 1;
369 llua_load(head->name);
370 llua_block_notify = 0;
371 NORM_ERR("Lua script '%s' reloaded", head->name);
372 if (mask & IN_IGNORED) {
373 /* for some reason we get IN_IGNORED here
374 * sometimes, so we need to re-add the watch */
375 head->wd = inotify_add_watch(inotify_fd,
385 #endif /* HAVE_SYS_INOTIFY_H */
387 void llua_set_number(const char *key, double value)
389 lua_pushnumber(lua_L, value);
390 lua_setfield(lua_L, -2, key);
393 void llua_set_startup_hook(const char *args)
395 startup_hook = strdup(args);
398 void llua_set_shutdown_hook(const char *args)
400 shutdown_hook = strdup(args);
403 void llua_startup_hook(void)
405 if (!lua_L || !startup_hook) return;
406 llua_do_call(startup_hook, 0);
409 void llua_shutdown_hook(void)
411 if (!lua_L || !shutdown_hook) return;
412 llua_do_call(shutdown_hook, 0);
416 void llua_draw_pre_hook(void)
418 if (!lua_L || !draw_pre_hook) return;
419 llua_do_call(draw_pre_hook, 0);
422 void llua_draw_post_hook(void)
424 if (!lua_L || !draw_post_hook) return;
425 llua_do_call(draw_post_hook, 0);
428 void llua_set_draw_pre_hook(const char *args)
430 draw_pre_hook = strdup(args);
433 void llua_set_draw_post_hook(const char *args)
435 draw_post_hook = strdup(args);
439 void llua_set_userdata(const char *key, const char *type, void *value)
441 tolua_pushusertype(lua_L, value, type);
442 lua_setfield(lua_L, -2, key);
444 #endif /* LUA_EXTRAS */
446 void llua_setup_window_table(int text_start_x, int text_start_y, int text_width, int text_height)
451 if (output_methods & TO_X) {
453 llua_set_userdata("drawable", "Drawable", (void*)&window.drawable);
454 llua_set_userdata("visual", "Visual", window.visual);
455 llua_set_userdata("display", "Display", display);
456 #endif /* LUA_EXTRAS */
459 llua_set_number("width", window.width);
460 llua_set_number("height", window.height);
461 llua_set_number("border_inner_margin", window.border_inner_margin);
462 llua_set_number("border_outer_margin", window.border_outer_margin);
463 llua_set_number("border_width", window.border_width);
465 llua_set_number("text_start_x", text_start_x);
466 llua_set_number("text_start_y", text_start_y);
467 llua_set_number("text_width", text_width);
468 llua_set_number("text_height", text_height);
470 lua_setglobal(lua_L, "conky_window");
474 void llua_update_window_table(int text_start_x, int text_start_y, int text_width, int text_height)
478 lua_getglobal(lua_L, "conky_window");
479 if (lua_isnil(lua_L, -1)) {
480 /* window table isn't populated yet */
485 llua_set_number("width", window.width);
486 llua_set_number("height", window.height);
488 llua_set_number("text_start_x", text_start_x);
489 llua_set_number("text_start_y", text_start_y);
490 llua_set_number("text_width", text_width);
491 llua_set_number("text_height", text_height);
493 lua_setglobal(lua_L, "conky_window");
497 void llua_setup_info(struct information *i, double u_interval)
502 llua_set_number("update_interval", u_interval);
503 llua_set_number("uptime", i->uptime);
505 lua_setglobal(lua_L, "conky_info");
508 void llua_update_info(struct information *i, double u_interval)
512 lua_getglobal(lua_L, "conky_info");
513 if (lua_isnil(lua_L, -1)) {
514 /* window table isn't populated yet */
519 llua_set_number("update_interval", u_interval);
520 llua_set_number("uptime", i->uptime);
522 lua_setglobal(lua_L, "conky_info");