1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
2 * vim: ts=4 sw=4 noet ai cindent syntax=c
4 * Conky, a system monitor, based on torsmo
6 * Copyright (c) 2009 Toni Spets
7 * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
31 #endif /* LUA_EXTRAS */
33 #ifdef HAVE_SYS_INOTIFY_H
34 #include <sys/inotify.h>
36 void llua_append_notify(const char *name);
37 void llua_rm_notifies(void);
38 static int llua_block_notify = 0;
39 #endif /* HAVE_SYS_INOTIFY_H */
41 static char *draw_pre_hook = 0;
42 static char *draw_post_hook = 0;
43 static char *startup_hook = 0;
44 static char *shutdown_hook = 0;
46 lua_State *lua_L = NULL;
48 static int llua_conky_parse(lua_State *L)
50 int n = lua_gettop(L); /* number of arguments */
52 char *buf = calloc(1, max_user_text);
54 lua_pushstring(L, "incorrect arguments, conky_parse(string) takes exactly 1 argument");
57 if (!lua_isstring(L, 1)) {
58 lua_pushstring(L, "incorrect argument (expecting a string)");
61 str = strdup(lua_tostring(L, 1));
63 lua_pushstring(L, buf);
66 return 1; /* number of results */
69 static int llua_conky_set_update_interval(lua_State *L)
71 int n = lua_gettop(L); /* number of arguments */
74 lua_pushstring(L, "incorrect arguments, conky_set_update_interval(number) takes exactly 1 argument");
77 if (!lua_isnumber(L, 1)) {
78 lua_pushstring(L, "incorrect argument (expecting a number)");
81 value = lua_tonumber(L, 1);
82 set_update_interval(value);
83 return 0; /* number of results */
88 const char *libs = PACKAGE_LIBDIR"/lib?.so;";
89 char *old_path, *new_path;
93 /* add our library path to the lua package.cpath global var */
95 lua_getglobal(lua_L, "package");
96 lua_getfield(lua_L, -1, "cpath");
97 old_path = strdup(lua_tostring(lua_L, -1));
98 new_path = malloc(strlen(old_path) + strlen(libs) + 1);
99 strcpy(new_path, libs);
100 strcat(new_path, old_path);
101 lua_pushstring(lua_L, new_path);
102 lua_setfield(lua_L, -3, "cpath");
107 lua_pushstring(lua_L, PACKAGE_NAME" "VERSION" compiled "BUILD_DATE" for "BUILD_ARCH);
108 lua_setglobal(lua_L, "conky_build_info");
110 lua_pushstring(lua_L, VERSION);
111 lua_setglobal(lua_L, "conky_version");
113 lua_pushstring(lua_L, BUILD_DATE);
114 lua_setglobal(lua_L, "conky_build_date");
116 lua_pushstring(lua_L, BUILD_ARCH);
117 lua_setglobal(lua_L, "conky_build_arch");
119 lua_pushstring(lua_L, current_config);
120 lua_setglobal(lua_L, "conky_config");
122 lua_pushcfunction(lua_L, &llua_conky_parse);
123 lua_setglobal(lua_L, "conky_parse");
125 lua_pushcfunction(lua_L, &llua_conky_set_update_interval);
126 lua_setglobal(lua_L, "conky_set_update_interval");
128 #if defined(X11) && defined(LUA_EXTRAS)
129 /* register tolua++ user types */
131 tolua_usertype(lua_L, "Drawable");
132 tolua_usertype(lua_L, "Visual");
133 tolua_usertype(lua_L, "Display");
137 void llua_load(const char *script)
140 char path[DEFAULT_TEXT_BUFFER_SIZE];
144 to_real_path(path, script);
145 error = luaL_dofile(lua_L, path);
147 NORM_ERR("llua_load: %s", lua_tostring(lua_L, -1));
149 #ifdef HAVE_SYS_INOTIFY_H
150 } else if (!llua_block_notify && inotify_fd != -1) {
151 llua_append_notify(path);
152 #endif /* HAVE_SYS_INOTIFY_H */
157 llua_do_call does a flexible call to any Lua function
158 string: <function> [par1] [par2...]
159 retc: the number of return values expected
161 char *llua_do_call(const char *string, int retc)
163 static char func[64];
166 char *tmp = strdup(string);
167 char *ptr = strtok(tmp, " ");
169 /* proceed only if the function name is present */
175 /* call only conky_ prefixed functions */
176 if(strncmp(ptr, LUAPREFIX, strlen(LUAPREFIX)) == 0) {
177 snprintf(func, 64, "%s", ptr);
179 snprintf(func, 64, "%s%s", LUAPREFIX, ptr);
182 /* push the function name to stack */
183 lua_getglobal(lua_L, func);
185 /* parse all function parameters from args and push them to the stack */
186 ptr = strtok(NULL, " ");
188 lua_pushstring(lua_L, ptr);
189 ptr = strtok(NULL, " ");
195 if(lua_pcall(lua_L, argc, retc, 0) != 0) {
196 NORM_ERR("llua_do_call: function %s execution failed: %s", func, lua_tostring(lua_L, -1));
205 * same as llua_do_call() except passes everything after func as one arg.
207 char *llua_do_read_call(const char *function, const char *arg, int retc)
209 static char func[64];
210 snprintf(func, 64, "conky_%s", function);
212 /* push the function name to stack */
213 lua_getglobal(lua_L, func);
215 /* push function parameter to the stack */
216 lua_pushstring(lua_L, arg);
218 if (lua_pcall(lua_L, 1, retc, 0) != 0) {
219 NORM_ERR("llua_do_call: function %s execution failed: %s", func, lua_tostring(lua_L, -1));
227 char *llua_getstring(const char *args)
232 if(!lua_L) return NULL;
234 func = llua_do_call(args, 1);
236 if (!lua_isstring(lua_L, -1)) {
237 NORM_ERR("llua_getstring: function %s didn't return a string, result discarded", func);
239 ret = strdup(lua_tostring(lua_L, -1));
247 char *llua_getstring_read(const char *function, const char *arg)
252 if(!lua_L) return NULL;
254 func = llua_do_read_call(function, arg, 1);
256 if(!lua_isstring(lua_L, -1)) {
257 NORM_ERR("llua_getstring_read: function %s didn't return a string, result discarded", func);
259 ret = strdup(lua_tostring(lua_L, -1));
267 int llua_getnumber(const char *args, double *ret)
273 func = llua_do_call(args, 1);
275 if(!lua_isnumber(lua_L, -1)) {
276 NORM_ERR("llua_getnumber: function %s didn't return a number, result discarded", func);
278 *ret = lua_tonumber(lua_L, -1);
286 void llua_close(void)
288 #ifdef HAVE_SYS_INOTIFY_H
290 #endif /* HAVE_SYS_INOTIFY_H */
295 if (draw_post_hook) {
296 free(draw_post_hook);
304 #ifdef HAVE_SYS_INOTIFY_H
305 struct _lua_notify_s {
307 char name[DEFAULT_TEXT_BUFFER_SIZE];
308 struct _lua_notify_s *next;
310 static struct _lua_notify_s *lua_notifies = 0;
312 static struct _lua_notify_s *llua_notify_list_do_alloc(const char *name)
314 struct _lua_notify_s *ret = malloc(sizeof(struct _lua_notify_s));
315 memset(ret, 0, sizeof(struct _lua_notify_s));
316 strncpy(ret->name, name, DEFAULT_TEXT_BUFFER_SIZE);
320 void llua_append_notify(const char *name)
323 struct _lua_notify_s *new_tail = 0;
325 /* empty, fresh new digs */
326 new_tail = lua_notifies = llua_notify_list_do_alloc(name);
328 struct _lua_notify_s *tail = lua_notifies;
332 // should be @ the end now
333 new_tail = llua_notify_list_do_alloc(name);
334 tail->next = new_tail;
336 new_tail->wd = inotify_add_watch(inotify_fd,
341 void llua_rm_notifies(void)
344 struct _lua_notify_s *head = lua_notifies;
345 struct _lua_notify_s *next = 0;
346 if (!lua_notifies) return;
347 inotify_rm_watch(inotify_fd, head->wd);
348 if (head->next) next = head->next;
353 inotify_rm_watch(inotify_fd, head->wd);
359 void llua_inotify_query(int wd, int mask)
361 struct _lua_notify_s *head = lua_notifies;
362 if (mask & IN_MODIFY || mask & IN_IGNORED) {
363 /* for whatever reason, i keep getting IN_IGNORED when the file is
366 if (head->wd == wd) {
367 llua_block_notify = 1;
368 llua_load(head->name);
369 llua_block_notify = 0;
370 NORM_ERR("Lua script '%s' reloaded", head->name);
371 if (mask & IN_IGNORED) {
372 /* for some reason we get IN_IGNORED here
373 * sometimes, so we need to re-add the watch */
374 head->wd = inotify_add_watch(inotify_fd,
384 #endif /* HAVE_SYS_INOTIFY_H */
386 void llua_set_number(const char *key, double value)
388 lua_pushnumber(lua_L, value);
389 lua_setfield(lua_L, -2, key);
392 void llua_set_startup_hook(const char *args)
394 startup_hook = strdup(args);
397 void llua_set_shutdown_hook(const char *args)
399 shutdown_hook = strdup(args);
402 void llua_startup_hook(void)
404 if (!lua_L || !startup_hook) return;
405 llua_do_call(startup_hook, 0);
408 void llua_shutdown_hook(void)
410 if (!lua_L || !shutdown_hook) return;
411 llua_do_call(shutdown_hook, 0);
415 void llua_draw_pre_hook(void)
417 if (!lua_L || !draw_pre_hook) return;
418 llua_do_call(draw_pre_hook, 0);
421 void llua_draw_post_hook(void)
423 if (!lua_L || !draw_post_hook) return;
424 llua_do_call(draw_post_hook, 0);
427 void llua_set_draw_pre_hook(const char *args)
429 draw_pre_hook = strdup(args);
432 void llua_set_draw_post_hook(const char *args)
434 draw_post_hook = strdup(args);
438 void llua_set_userdata(const char *key, const char *type, void *value)
440 tolua_pushusertype(lua_L, value, type);
441 lua_setfield(lua_L, -2, key);
443 #endif /* LUA_EXTRAS */
445 void llua_setup_window_table(int text_start_x, int text_start_y, int text_width, int text_height)
450 if (output_methods & TO_X) {
452 llua_set_userdata("drawable", "Drawable", (void*)&window.drawable);
453 llua_set_userdata("visual", "Visual", window.visual);
454 llua_set_userdata("display", "Display", display);
455 #endif /* LUA_EXTRAS */
458 llua_set_number("width", window.width);
459 llua_set_number("height", window.height);
460 llua_set_number("border_inner_margin", window.border_inner_margin);
461 llua_set_number("border_outer_margin", window.border_outer_margin);
462 llua_set_number("border_width", window.border_width);
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_update_window_table(int text_start_x, int text_start_y, int text_width, int text_height)
477 lua_getglobal(lua_L, "conky_window");
478 if (lua_isnil(lua_L, -1)) {
479 /* window table isn't populated yet */
484 llua_set_number("width", window.width);
485 llua_set_number("height", window.height);
487 llua_set_number("text_start_x", text_start_x);
488 llua_set_number("text_start_y", text_start_y);
489 llua_set_number("text_width", text_width);
490 llua_set_number("text_height", text_height);
492 lua_setglobal(lua_L, "conky_window");
496 void llua_setup_info(struct information *i, double u_interval)
501 llua_set_number("update_interval", u_interval);
502 llua_set_number("uptime", i->uptime);
504 lua_setglobal(lua_L, "conky_info");
507 void llua_update_info(struct information *i, double u_interval)
511 lua_getglobal(lua_L, "conky_info");
512 if (lua_isnil(lua_L, -1)) {
513 /* window table isn't populated yet */
518 llua_set_number("update_interval", u_interval);
519 llua_set_number("uptime", i->uptime);
521 lua_setglobal(lua_L, "conky_info");