gui.c Fix error handling of for_each_stat_item().
[paraslash.git] / gui.c
1 /*
2 * Copyright (C) 1998 Andre Noll <maan@tuebingen.mpg.de>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file gui.c Curses-based interface for paraslash. */
8
9 #include <regex.h>
10 #include <signal.h>
11 #include <sys/types.h>
12 #include <curses.h>
13 #include <locale.h>
14 #include <sys/time.h>
15
16 #include "gui.cmdline.h"
17 #include "para.h"
18 #include "gui.h"
19 #include "string.h"
20 #include "ringbuffer.h"
21 #include "fd.h"
22 #include "error.h"
23 #include "list.h"
24 #include "sched.h"
25 #include "signal.h"
26 #include "ggo.h"
27 #include "version.h"
28
29 /** define the array of error lists needed by para_gui */
30 INIT_GUI_ERRLISTS;
31 static char *stat_content[NUM_STAT_ITEMS];
32
33 static struct gui_window {
34 WINDOW *win;
35 bool needs_update;
36 } top, bot, sb, in, sep;
37
38 /** How many lines of output to remember. */
39 #define RINGBUFFER_SIZE 512
40
41 struct rb_entry {
42 char *msg;
43 size_t len;
44 int color;
45 };
46 static struct ringbuffer *bot_win_rb;
47
48 static unsigned scroll_position;
49
50 static pid_t exec_pid;
51
52 static int exec_fds[2] = {-1, -1};
53 static struct gui_args_info conf;
54 static int loglevel;
55
56 /** Type of the process currently being executed. */
57 enum exec_status {
58 EXEC_IDLE, /**< No process running. */
59 EXEC_DCMD, /**< para or display process running. */
60 EXEC_XCMD, /**< External process running. */
61 };
62
63 /**
64 * Codes for various colors.
65 *
66 * Each status item has its own color pair. The ones defined here start at a
67 * higher number so that they do not overlap with these.
68 */
69 enum gui_color_pair {
70 COLOR_STATUSBAR = NUM_STAT_ITEMS + 1,
71 COLOR_COMMAND,
72 COLOR_OUTPUT,
73 COLOR_MSG,
74 COLOR_ERRMSG,
75 COLOR_SEPARATOR,
76 COLOR_TOP,
77 COLOR_BOT,
78 };
79
80 struct gui_command {
81 const char *key;
82 const char *name;
83 const char *description;
84 void (*handler)(void);
85 };
86
87 static struct gui_theme theme;
88
89 #define GUI_COMMANDS \
90 GUI_COMMAND(help, "?", "print help") \
91 GUI_COMMAND(enlarge_top_win, "+", "enlarge the top window") \
92 GUI_COMMAND(shrink_top_win, "-", "shrink the top window") \
93 GUI_COMMAND(reread_conf, "r", "reread configuration file") \
94 GUI_COMMAND(quit, "q", "exit para_gui") \
95 GUI_COMMAND(refresh, "^L", "redraw the screen") \
96 GUI_COMMAND(next_theme, ".", "switch to next theme") \
97 GUI_COMMAND(prev_theme, ",", "switch to previous theme") \
98 GUI_COMMAND(ll_incr, ">", "increase loglevel (decreases verbosity)") \
99 GUI_COMMAND(ll_decr, "<", "decrease loglevel (increases verbosity)") \
100 GUI_COMMAND(version, "V", "show the para_gui version") \
101 GUI_COMMAND(scroll_up, "<up>", "scroll up one line") \
102 GUI_COMMAND(scroll_down, "<down>", "scroll_down") \
103 GUI_COMMAND(page_up, "<ppage>", "scroll up one page") \
104 GUI_COMMAND(page_down, "<npage>", "scroll down one page") \
105 GUI_COMMAND(scroll_top, "<home>", "scroll to top of buffer") \
106 GUI_COMMAND(cancel_scroll, "<end>", "deactivate scroll mode") \
107
108 /* declare command handlers */
109 #define GUI_COMMAND(_c, _k, _d) \
110 static void com_ ## _c(void);
111 GUI_COMMANDS
112
113 #undef GUI_COMMAND
114
115 /* define command array */
116 #define GUI_COMMAND(_c, _k, _d) \
117 { \
118 .key = _k, \
119 .name = #_c, \
120 .description = _d, \
121 .handler = com_ ## _c \
122 },
123
124 static struct gui_command command_list[] = {GUI_COMMANDS {.name = NULL}};
125
126 struct input_task {
127 struct task *task;
128 };
129
130 struct status_task {
131 struct task *task;
132 pid_t pid;
133 char *buf;
134 int bufsize, loaded;
135 struct timeval next_exec;
136 int fd;
137 };
138
139 /** Stdout/stderr of the executing process is read in chunks of this size. */
140 #define COMMAND_BUF_SIZE 32768
141
142 struct exec_task {
143 struct task *task;
144 char command_buf[2][COMMAND_BUF_SIZE]; /* stdout/stderr of command */
145 int cbo[2]; /* command buf offsets */
146 unsigned flags[2]; /* passed to for_each_line() */
147 };
148
149 static int find_cmd_byname(char *name)
150 {
151 int i;
152
153 for (i = 0; command_list[i].handler; i++)
154 if (!strcmp(command_list[i].name, name))
155 return i;
156 return -1;
157 }
158
159 /*
160 * Even though ncurses provides getmaxx and getmaxy, these functions/macros are
161 * not described in the XSI Curses standard.
162 */
163 static int get_num_lines(struct gui_window *w)
164 {
165 int lines;
166 __a_unused int cols; /* avoid "set but not used" warnings */
167
168 getmaxyx(w->win, lines, cols);
169 return lines;
170 }
171
172 static int get_num_cols(struct gui_window *w)
173 {
174 __a_unused int lines; /* avoid "set but not used" warnings */
175 int cols;
176
177 getmaxyx(w->win, lines, cols);
178 return cols;
179 }
180
181 /** Number of lines of the window are occupied by an output line. */
182 #define NUM_LINES(len) (1 + (len) / get_num_cols(&bot))
183
184 /* isendwin() returns false before initscr() was called */
185 static bool curses_active(void)
186 {
187 return top.win && !isendwin();
188 }
189
190 /* taken from mutt */
191 static char *km_keyname(int c)
192 {
193 static char buf[10];
194
195 if (c == KEY_UP) {
196 sprintf(buf, "<up>");
197 return buf;
198 }
199 if (c == KEY_DOWN) {
200 sprintf(buf, "<down>");
201 return buf;
202 }
203 if (c == KEY_LEFT) {
204 sprintf(buf, "<left>");
205 return buf;
206 }
207 if (c == KEY_RIGHT) {
208 sprintf(buf, "<right>");
209 return buf;
210 }
211 if (c == KEY_NPAGE) {
212 sprintf(buf, "<npage>");
213 return buf;
214 }
215 if (c == KEY_PPAGE) {
216 sprintf(buf, "<ppage>");
217 return buf;
218 }
219 if (c == KEY_HOME) {
220 sprintf(buf, "<home>");
221 return buf;
222 }
223 if (c == KEY_END) {
224 sprintf(buf, "<end>");
225 return buf;
226 }
227 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
228 if (c < 0)
229 c += 256;
230 if (c < 128) {
231 buf[0] = '^';
232 buf[1] = (c + '@') & 0x7f;
233 buf[2] = 0;
234 } else
235 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
236 (c >> 3) & 7, c & 7);
237 } else if (c >= KEY_F0 && c < KEY_F(256))
238 sprintf(buf, "<F%d>", c - KEY_F0);
239 else if (isprint(c))
240 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
241 else
242 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
243 return buf;
244 }
245
246 /* Print given number of spaces to curses window. */
247 static void add_spaces(WINDOW* win, unsigned int num)
248 {
249 char space[] = " ";
250 unsigned sz = sizeof(space) - 1; /* number of spaces */
251
252 while (num >= sz) {
253 waddstr(win, space);
254 num -= sz;
255 }
256 if (num > 0) {
257 assert(num < sz);
258 space[num] = '\0';
259 waddstr(win, space);
260 }
261 }
262
263 /*
264 * print aligned string to curses window. This function always prints
265 * exactly len chars.
266 */
267 static int align_str(WINDOW* win, char *str, unsigned int len,
268 unsigned int align)
269 {
270 int ret, i, num; /* of spaces */
271 size_t width;
272
273 if (!win || !str)
274 return 0;
275 ret = strwidth(str, &width);
276 if (ret < 0) {
277 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
278 width = 0;
279 str[0] = '\0';
280 }
281 num = len - width;
282 if (num < 0) {
283 str[len] = '\0';
284 num = 0;
285 }
286 /* replace control characters by spaces */
287 for (i = 0; i < len && str[i]; i++) {
288 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
289 str[i] = ' ';
290 }
291 if (align == LEFT) {
292 waddstr(win, str);
293 add_spaces(win, num);
294 } else if (align == RIGHT) {
295 add_spaces(win, num);
296 waddstr(win, str);
297 } else {
298 add_spaces(win, num / 2);
299 waddstr(win, str[0]? str: "");
300 add_spaces(win, num - num / 2);
301 }
302 return 1;
303 }
304
305 static void refresh_window(struct gui_window *gw)
306 {
307 gw->needs_update = true;
308 }
309
310 static bool window_update_needed(void)
311 {
312 return top.needs_update || bot.needs_update || sb.needs_update ||
313 in.needs_update || sep.needs_update;
314 }
315
316 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
317 {
318 char *msg;
319 va_list ap;
320
321 if (!curses_active())
322 return;
323 wattron(in.win, COLOR_PAIR(color));
324 va_start(ap, fmt);
325 xvasprintf(&msg, fmt, ap);
326 va_end(ap);
327 wmove(in.win, 0, 0);
328 align_str(in.win, msg, get_num_cols(&in), LEFT);
329 free(msg);
330 refresh_window(&in);
331 }
332
333 static void print_status_bar(void)
334 {
335 char *tmp;
336
337 tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
338 wmove(sb.win, 0, 0);
339 align_str(sb.win, tmp, get_num_cols(&sb), CENTER);
340 free(tmp);
341 }
342
343 /*
344 * get the number of the oldest rbe that is (partially) visible. On return,
345 * lines contains the sum of the number of lines of all visible entries. If the
346 * first one is only partially visible, lines is greater than bot.lines.
347 */
348 static int first_visible_rbe(unsigned *lines)
349 {
350 int i, bot_lines = get_num_lines(&bot);
351
352 *lines = 0;
353 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
354 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
355 int rbe_lines;
356 if (!rbe)
357 return i - 1;
358 rbe_lines = NUM_LINES(rbe->len);
359 if (rbe_lines > bot_lines)
360 return -1;
361 *lines += rbe_lines;
362 if (*lines >= bot_lines)
363 return i;
364 }
365 return RINGBUFFER_SIZE - 1;
366 }
367
368 /*
369 returns number of first visible rbe, *lines is the number of lines drawn.
370 */
371 static int draw_top_rbe(unsigned *lines)
372 {
373 int bot_cols, bot_lines, ret, fvr = first_visible_rbe(lines);
374 struct rb_entry *rbe;
375 size_t bytes_to_skip, cells_to_skip, width;
376
377 if (fvr < 0)
378 return -1;
379 wmove(bot.win, 0, 0);
380 rbe = ringbuffer_get(bot_win_rb, fvr);
381 if (!rbe)
382 return -1;
383 getmaxyx(bot.win, bot_lines, bot_cols);
384 if (*lines > bot_lines) {
385 /* rbe is partially visible multi-line */
386 cells_to_skip = (*lines - bot_lines) * bot_cols;
387 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
388 if (ret < 0)
389 return ret;
390 ret = strwidth(rbe->msg + bytes_to_skip, &width);
391 if (ret < 0)
392 return ret;
393 } else {
394 bytes_to_skip = 0;
395 width = rbe->len;
396 }
397 wattron(bot.win, COLOR_PAIR(rbe->color));
398 waddstr(bot.win, rbe->msg + bytes_to_skip);
399 *lines = NUM_LINES(width);
400 return fvr;
401 }
402
403 static void redraw_bot_win(void)
404 {
405 unsigned lines;
406 int i, bot_lines = get_num_lines(&bot);
407
408 wmove(bot.win, 0, 0);
409 wclear(bot.win);
410 i = draw_top_rbe(&lines);
411 if (i <= 0)
412 goto out;
413 while (i > 0 && lines < bot_lines) {
414 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
415 if (!rbe) {
416 lines++;
417 waddstr(bot.win, "\n");
418 continue;
419 }
420 lines += NUM_LINES(rbe->len);
421 wattron(bot.win, COLOR_PAIR(rbe->color));
422 waddstr(bot.win, "\n");
423 waddstr(bot.win, rbe->msg);
424 }
425 out:
426 refresh_window(&bot);
427 }
428
429 static void rb_add_entry(int color, char *msg)
430 {
431 struct rb_entry *old, *new;
432 int x, y;
433 size_t len;
434
435 if (strwidth(msg, &len) < 0)
436 return;
437 new = para_malloc(sizeof(struct rb_entry));
438 new->color = color;
439 new->len = len;
440 new->msg = msg;
441 old = ringbuffer_add(bot_win_rb, new);
442 if (old) {
443 free(old->msg);
444 free(old);
445 }
446 if (scroll_position) {
447 /* discard current scrolling, like xterm does */
448 scroll_position = 0;
449 redraw_bot_win();
450 return;
451 }
452 wattron(bot.win, COLOR_PAIR(color));
453 getyx(bot.win, y, x);
454 if (y || x)
455 waddstr(bot.win, "\n");
456 waddstr(bot.win, msg);
457 }
458
459 /*
460 * print formated output to bot win and refresh
461 */
462 __printf_2_3 static void outputf(int color, const char* fmt,...)
463 {
464 char *msg;
465 va_list ap;
466
467 if (!curses_active())
468 return;
469 va_start(ap, fmt);
470 xvasprintf(&msg, fmt, ap);
471 va_end(ap);
472 rb_add_entry(color, msg);
473 refresh_window(&bot);
474 }
475
476 static int add_output_line(char *line, void *data)
477 {
478 int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
479
480 if (!curses_active())
481 return 1;
482 rb_add_entry(color, para_strdup(line));
483 return 1;
484 }
485
486 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
487 {
488 va_list ap;
489
490 if (ll < loglevel)
491 return;
492 va_start(ap, fmt);
493 if (curses_active()) {
494 int color = ll <= LL_NOTICE? COLOR_MSG : COLOR_ERRMSG;
495 char *msg;
496 unsigned bytes = xvasprintf(&msg, fmt, ap);
497 if (bytes > 0 && msg[bytes - 1] == '\n')
498 msg[bytes - 1] = '\0'; /* cut trailing newline */
499 rb_add_entry(color, msg);
500 refresh_window(&bot);
501 } else if (exec_pid <= 0) /* no external command running */
502 vfprintf(stderr, fmt, ap);
503 va_end(ap);
504 }
505 /** The log function of para_gui, always set to curses_log(). */
506 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
507
508 static void shutdown_curses(void)
509 {
510 def_prog_mode();
511 endwin();
512 }
513
514 /* disable curses, print a message, kill running processes and exit */
515 __noreturn __printf_2_3 static void die(int exit_code, const char* fmt, ...)
516 {
517 va_list argp;
518
519 shutdown_curses();
520 va_start(argp, fmt);
521 vfprintf(stderr, fmt, argp);
522 va_end(argp);
523 /* kill every process in the process group and exit */
524 para_sigaction(SIGTERM, SIG_IGN);
525 kill(0, SIGTERM);
526 exit(exit_code);
527 }
528
529 /*
530 * Print stat item #i to curses window
531 */
532 static void print_stat_item(int i)
533 {
534 char *tmp;
535 struct stat_item_data d = theme.data[i];
536 char *c = stat_content[i];
537 int top_lines = get_num_lines(&top);
538
539 if (!curses_active() || !d.len || !c)
540 return;
541 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
542 wmove(top.win, d.y * top_lines / 100, d.x * COLS / 100);
543 wattron(top.win, COLOR_PAIR(i + 1));
544 align_str(top.win, tmp, d.len * COLS / 100, d.align);
545 free(tmp);
546 refresh_window(&top);
547 }
548
549 static int update_item(int item_num, char *buf)
550 {
551 char **c = stat_content + item_num;
552
553 free(*c);
554 if (buf && buf[0])
555 goto dup;
556 switch (item_num) {
557 case SI_ARTIST:
558 *c = para_strdup("(artist tag not set)");
559 goto print;
560 case SI_TITLE:
561 *c = para_strdup("(title tag not set)");
562 goto print;
563 case SI_YEAR:
564 *c = para_strdup("????");
565 goto print;
566 case SI_ALBUM:
567 *c = para_strdup("(album tag not set)");
568 goto print;
569 case SI_COMMENT:
570 *c = para_strdup("(comment tag not set)");
571 goto print;
572 }
573 dup:
574 *c = para_strdup(buf);
575 print:
576 print_stat_item(item_num);
577 return 1;
578 }
579
580 static void print_all_items(void)
581 {
582 int i;
583
584 if (!curses_active())
585 return;
586 FOR_EACH_STATUS_ITEM(i)
587 print_stat_item(i);
588 }
589
590 static void clear_all_items(void)
591 {
592 int i;
593
594 FOR_EACH_STATUS_ITEM(i) {
595 free(stat_content[i]);
596 stat_content[i] = para_strdup("");
597 }
598 }
599
600 static void status_pre_select(struct sched *s, void *context)
601 {
602 struct status_task *st = context;
603
604 if (st->fd >= 0)
605 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
606 if (task_get_notification(st->task) < 0)
607 return sched_min_delay(s);
608 if (st->fd < 0)
609 sched_request_barrier_or_min_delay(&st->next_exec, s);
610 }
611
612 static int status_post_select(struct sched *s, void *context)
613 {
614 struct status_task *st = context;
615 size_t sz;
616 int ret, ret2;
617
618 ret = task_get_notification(st->task);
619 if (ret == -E_GUI_SIGCHLD && st->pid > 0) {
620 int exit_status;
621 if (waitpid(st->pid, &exit_status, WNOHANG) == st->pid) {
622 st->pid = 0;
623 PARA_ERROR_LOG("stat command exit status: %d",
624 exit_status);
625 }
626 }
627 if (st->fd < 0) {
628 int fds[3] = {0, 1, 0};
629 if (st->pid > 0)
630 return 0;
631 /* Avoid busy loop */
632 if (tv_diff(&st->next_exec, now, NULL) > 0)
633 return 0;
634 st->next_exec.tv_sec = now->tv_sec + 2;
635 ret = para_exec_cmdline_pid(&st->pid, conf.stat_cmd_arg, fds);
636 if (ret < 0)
637 return 0;
638 ret = mark_fd_nonblocking(fds[1]);
639 if (ret < 0) {
640 close(fds[1]);
641 return 0;
642 }
643 st->fd = fds[1];
644 return 0;
645 }
646
647 if (st->loaded >= st->bufsize) {
648 if (st->bufsize > 1000 * 1000) {
649 st->loaded = 0;
650 return 0;
651 }
652 st->bufsize += st->bufsize + 1000;
653 st->buf = para_realloc(st->buf, st->bufsize);
654 }
655 assert(st->loaded < st->bufsize);
656 ret = read_nonblock(st->fd, st->buf + st->loaded,
657 st->bufsize - st->loaded, &s->rfds, &sz);
658 st->loaded += sz;
659 ret2 = for_each_stat_item(st->buf, st->loaded, update_item);
660 if (ret < 0 || ret2 < 0) {
661 st->loaded = 0;
662 PARA_NOTICE_LOG("closing stat pipe: %s\n",
663 para_strerror(ret < 0? -ret : -ret2));
664 close(st->fd);
665 st->fd = -1;
666 clear_all_items();
667 free(stat_content[SI_BASENAME]);
668 stat_content[SI_BASENAME] =
669 para_strdup("stat command terminated!?");
670 print_all_items();
671 return 0;
672 }
673 sz = ret2; /* what is left */
674 if (sz > 0 && sz < st->loaded)
675 memmove(st->buf, st->buf + st->loaded - sz, sz);
676 st->loaded = sz;
677 return 0;
678 }
679
680 /*
681 * init all windows
682 */
683 static void init_wins(int top_lines)
684 {
685 int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
686 in_y = LINES - 1, sep_y = top_lines;
687 int bot_lines = LINES - top_lines - 3, sb_lines = 1, in_lines = 1,
688 sep_lines = 1;
689
690 assume_default_colors(theme.dflt.fg, theme.dflt.bg);
691 if (top.win) {
692 wresize(top.win, top_lines, COLS);
693 mvwin(top.win, top_y, 0);
694
695 wresize(sb.win, sb_lines, COLS);
696 mvwin(sb.win, sb_y, 0);
697
698 wresize(sep.win, sep_lines, COLS);
699 mvwin(sep.win, sep_y, 0);
700
701 wresize(bot.win, bot_lines, COLS);
702 mvwin(bot.win, bot_y, 0);
703
704 wresize(in.win, in_lines, COLS);
705 mvwin(in.win, in_y, 0);
706 } else {
707 sep.win = newwin(sep_lines, COLS, sep_y, 0);
708 top.win = newwin(top_lines, COLS, top_y, 0);
709 bot.win = newwin(bot_lines, COLS, bot_y, 0);
710 sb.win = newwin(sb_lines, COLS, sb_y, 0);
711 in.win = newwin(in_lines, COLS, in_y, 0);
712 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
713 die(EXIT_FAILURE, "Error: Cannot create curses windows\n");
714 wclear(bot.win);
715 wclear(sb.win);
716 wclear(in.win);
717 scrollok(bot.win, 1);
718 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
719 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
720 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
721 wattron(top.win, COLOR_PAIR(COLOR_TOP));
722 nodelay(top.win, 1);
723 nodelay(bot.win, 1);
724 nodelay(sb.win, 1);
725 nodelay(in.win, 0);
726
727 keypad(top.win, 1);
728 keypad(bot.win, 1);
729 keypad(sb.win, 1);
730 keypad(in.win, 1);
731 }
732 wmove(sep.win, 0, 0);
733 whline(sep.win, theme.sep_char, COLS);
734 wclear(top.win);
735 print_all_items();
736 //wclear(bot.win);
737 wnoutrefresh(top.win);
738 wnoutrefresh(bot.win);
739 print_status_bar();
740 wnoutrefresh(sb.win);
741 wnoutrefresh(in.win);
742 wnoutrefresh(sep.win);
743 doupdate();
744 }
745
746 static void init_pair_or_die(short pair, short f, short b)
747 {
748 if (init_pair(pair, f, b) == ERR)
749 die(EXIT_FAILURE, "fatal: init_pair() failed\n");
750 }
751
752 static void init_colors_or_die(void)
753 {
754 int i;
755
756 if (!has_colors())
757 die(EXIT_FAILURE, "fatal: No color term\n");
758 if (start_color() == ERR)
759 die(EXIT_FAILURE, "fatal: failed to start colors\n");
760 FOR_EACH_STATUS_ITEM(i)
761 if (theme.data[i].len)
762 init_pair_or_die(i + 1, theme.data[i].color.fg,
763 theme.data[i].color.bg);
764 init_pair_or_die(COLOR_STATUSBAR, theme.sb.fg, theme.sb.bg);
765 init_pair_or_die(COLOR_COMMAND, theme.cmd.fg, theme.cmd.bg);
766 init_pair_or_die(COLOR_OUTPUT, theme.output.fg, theme.output.bg);
767 init_pair_or_die(COLOR_MSG, theme.msg.fg, theme.msg.bg);
768 init_pair_or_die(COLOR_ERRMSG, theme.err_msg.fg, theme.err_msg.bg);
769 init_pair_or_die(COLOR_SEPARATOR, theme.sep.fg, theme.sep.bg);
770 init_pair_or_die(COLOR_TOP, theme.dflt.fg, theme.dflt.bg);
771 init_pair_or_die(COLOR_BOT, theme.dflt.fg, theme.dflt.bg);
772 }
773
774 /* (Re-)initialize the curses library. */
775 static void init_curses(void)
776 {
777 if (curses_active())
778 return;
779 if (top.win && refresh() == ERR) /* refresh is really needed */
780 die(EXIT_FAILURE, "refresh() failed\n");
781 if (LINES < theme.lines_min || COLS < theme.cols_min)
782 die(EXIT_FAILURE, "Terminal (%dx%d) too small"
783 " (need at least %dx%d)\n", COLS, LINES,
784 theme.cols_min, theme.lines_min);
785 curs_set(0); /* make cursor invisible, ignore errors */
786 nonl(); /* do not NL->CR/NL on output, always returns OK */
787 /* don't echo input */
788 if (noecho() == ERR)
789 die(EXIT_FAILURE, "fatal: noecho() failed\n");
790 /* take input chars one at a time, no wait for \n */
791 if (cbreak() == ERR)
792 die(EXIT_FAILURE, "fatal: cbreak() failed\n");
793 init_colors_or_die();
794 clear(); /* ignore non-fatal errors */
795 init_wins(theme.top_lines_default);
796 // noecho(); /* don't echo input */
797 }
798
799 /*
800 * This sucker modifies its first argument. *handler and *arg are
801 * pointers to 0-terminated strings (inside line). Crap.
802 */
803 static int split_key_map(char *line, char **handler, char **arg)
804 {
805 if (!(*handler = strchr(line + 1, ':')))
806 goto err_out;
807 **handler = '\0';
808 (*handler)++;
809 if (!(*arg = strchr(*handler, ':')))
810 goto err_out;
811 **arg = '\0';
812 (*arg)++;
813 return 1;
814 err_out:
815 return 0;
816 }
817
818 static void check_key_map_args_or_die(void)
819 {
820 int i;
821 char *tmp = NULL;
822
823 for (i = 0; i < conf.key_map_given; ++i) {
824 char *handler, *arg;
825
826 free(tmp);
827 tmp = para_strdup(conf.key_map_arg[i]);
828 if (!split_key_map(tmp, &handler, &arg))
829 break;
830 if (strlen(handler) != 1)
831 break;
832 if (*handler != 'x' && *handler != 'd' && *handler != 'i'
833 && *handler != 'p')
834 break;
835 if (*handler != 'i')
836 continue;
837 if (find_cmd_byname(arg) < 0)
838 break;
839 }
840 if (i != conf.key_map_given)
841 die(EXIT_FAILURE, "invalid key map: %s\n", conf.key_map_arg[i]);
842 free(tmp);
843 }
844
845 static void parse_config_file_or_die(bool override)
846 {
847 bool err;
848 char *config_file;
849 struct gui_cmdline_parser_params params = {
850 .override = override,
851 .initialize = 0,
852 .check_required = !override,
853 .check_ambiguity = 0,
854 .print_errors = 1,
855 };
856
857 if (conf.config_file_given)
858 config_file = para_strdup(conf.config_file_arg);
859 else {
860 char *home = para_homedir();
861 config_file = make_message("%s/.paraslash/gui.conf", home);
862 free(home);
863 }
864 if (!file_exists(config_file)) {
865 if (!conf.config_file_given)
866 err = false;
867 else {
868 PARA_EMERG_LOG("config file %s does not exist\n",
869 config_file);
870 err = true;
871 }
872 goto out;
873 }
874 gui_cmdline_parser_config_file(config_file, &conf, &params);
875 loglevel = get_loglevel_by_name(conf.loglevel_arg);
876 check_key_map_args_or_die();
877 err = false;
878 out:
879 free(config_file);
880 if (err)
881 exit(EXIT_FAILURE);
882 theme_init(conf.theme_arg, &theme);
883 }
884
885 /* reread configuration, terminate on errors */
886 static void reread_conf(void)
887 {
888 /*
889 * gengetopt might print to stderr and exit on errors. So we have to
890 * shutdown curses first.
891 */
892 shutdown_curses();
893 parse_config_file_or_die(true /* override */);
894 init_curses();
895 print_in_bar(COLOR_MSG, "config file reloaded\n");
896 }
897
898 /*
899 * React to various signal-related events
900 */
901 static int signal_post_select(struct sched *s, __a_unused void *context)
902 {
903 int ret = para_next_signal(&s->rfds);
904
905 if (ret <= 0)
906 return 0;
907 switch (ret) {
908 case SIGTERM:
909 die(EXIT_FAILURE, "only the good die young (caught SIGTERM)\n");
910 return 1;
911 case SIGINT:
912 PARA_WARNING_LOG("caught SIGINT, reset\n");
913 /* Nothing to do. SIGINT killed our child which gets noticed
914 * by do_select and resets everything.
915 */
916 return 1;
917 case SIGUSR1:
918 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
919 reread_conf();
920 return 1;
921 case SIGCHLD:
922 task_notify_all(s, E_GUI_SIGCHLD);
923 return 1;
924 }
925 return 1;
926 }
927
928 static enum exec_status exec_status(void)
929 {
930 if (exec_fds[0] >= 0 || exec_fds[1] >= 0)
931 return EXEC_DCMD;
932 if (exec_pid > 0)
933 return EXEC_XCMD;
934 return EXEC_IDLE;
935 }
936
937 static void exec_pre_select(struct sched *s, void *context)
938 {
939 struct exec_task *et = context;
940 if (exec_fds[0] >= 0)
941 para_fd_set(exec_fds[0], &s->rfds, &s->max_fileno);
942 if (exec_fds[1] >= 0)
943 para_fd_set(exec_fds[1], &s->rfds, &s->max_fileno);
944 if (task_get_notification(et->task) < 0)
945 sched_min_delay(s);
946 }
947
948 static int exec_post_select(struct sched *s, void *context)
949 {
950 struct exec_task *ct = context;
951 int i, ret;
952
953 ret = task_get_notification(ct->task);
954 if (ret == -E_GUI_SIGCHLD && exec_pid > 0) {
955 int exit_status;
956 if (waitpid(exec_pid, &exit_status, WNOHANG) == exec_pid) {
957 exec_pid = 0;
958 init_curses();
959 PARA_INFO_LOG("command exit status: %d", exit_status);
960 print_in_bar(COLOR_MSG, " ");
961 }
962 }
963 for (i = 0; i < 2; i++) {
964 size_t sz;
965 if (exec_fds[i] < 0)
966 continue;
967 ret = read_nonblock(exec_fds[i],
968 ct->command_buf[i] + ct->cbo[i],
969 COMMAND_BUF_SIZE - 1 - ct->cbo[i], &s->rfds, &sz);
970 ct->cbo[i] += sz;
971 sz = ct->cbo[i];
972 ct->cbo[i] = for_each_line(ct->flags[i], ct->command_buf[i],
973 ct->cbo[i], add_output_line, &i);
974 if (sz != ct->cbo[i]) { /* at least one line found */
975 refresh_window(&bot);
976 ct->flags[i] = 0;
977 }
978 if (ret < 0 || exec_pid == 0) {
979 if (ret < 0)
980 PARA_NOTICE_LOG("closing command fd %d: %s",
981 i, para_strerror(-ret));
982 close(exec_fds[i]);
983 exec_fds[i] = -1;
984 ct->flags[i] = 0;
985 ct->cbo[i] = 0;
986 if (exec_fds[!i] < 0) /* both fds closed */
987 return 1;
988 }
989 if (ct->cbo[i] == COMMAND_BUF_SIZE - 1) {
990 PARA_NOTICE_LOG("discarding overlong line");
991 ct->cbo[i] = 0;
992 ct->flags[i] = FELF_DISCARD_FIRST;
993 }
994 }
995 return 0;
996 }
997
998 static void input_pre_select(struct sched *s, __a_unused void *context)
999 {
1000 if (exec_status() != EXEC_XCMD)
1001 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
1002 if (window_update_needed())
1003 sched_min_delay(s);
1004 }
1005
1006 /* read from command pipe and print data to bot window */
1007 static void exec_and_display(const char *file_and_args)
1008 {
1009 int ret, fds[3] = {0, 1, 1};
1010
1011 outputf(COLOR_COMMAND, "%s", file_and_args);
1012 ret = para_exec_cmdline_pid(&exec_pid, file_and_args, fds);
1013 if (ret < 0)
1014 return;
1015 ret = mark_fd_nonblocking(fds[1]);
1016 if (ret < 0)
1017 goto fail;
1018 ret = mark_fd_nonblocking(fds[2]);
1019 if (ret < 0)
1020 goto fail;
1021 exec_fds[0] = fds[1];
1022 exec_fds[1] = fds[2];
1023 print_in_bar(COLOR_MSG, "hit any key to abort\n");
1024 return;
1025 fail:
1026 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1027 close(exec_fds[0]);
1028 close(exec_fds[1]);
1029 }
1030
1031 static void exec_para(const char *args)
1032 {
1033 char *file_and_args;
1034
1035 file_and_args = make_message(BINDIR "/para_client -- %s", args);
1036 exec_and_display(file_and_args);
1037 free(file_and_args);
1038 }
1039
1040 /*
1041 * shutdown curses and stat pipe before executing external commands
1042 */
1043 static void exec_external(char *file_and_args)
1044 {
1045 int fds[3] = {-1, -1, -1};
1046
1047 if (exec_pid)
1048 return;
1049 shutdown_curses();
1050 para_exec_cmdline_pid(&exec_pid, file_and_args, fds);
1051 }
1052
1053 static void handle_command(int c)
1054 {
1055 int i;
1056
1057 /* first check user-defined key bindings */
1058 for (i = 0; i < conf.key_map_given; ++i) {
1059 char *tmp, *handler, *arg;
1060
1061 tmp = para_strdup(conf.key_map_arg[i]);
1062 if (!split_key_map(tmp, &handler, &arg)) {
1063 free(tmp);
1064 return;
1065 }
1066 if (strcmp(tmp, km_keyname(c))) {
1067 free(tmp);
1068 continue;
1069 }
1070 if (*handler == 'd')
1071 exec_and_display(arg);
1072 else if (*handler == 'x')
1073 exec_external(arg);
1074 else if (*handler == 'p')
1075 exec_para(arg);
1076 else if (*handler == 'i') {
1077 int num = find_cmd_byname(arg);
1078 if (num >= 0)
1079 command_list[num].handler();
1080 }
1081 free(tmp);
1082 return;
1083 }
1084 /* not found, check internal key bindings */
1085 for (i = 0; command_list[i].handler; i++) {
1086 if (!strcmp(km_keyname(c), command_list[i].key)) {
1087 command_list[i].handler();
1088 return;
1089 }
1090 }
1091 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1092 km_keyname(c));
1093 }
1094
1095 static int input_post_select(__a_unused struct sched *s, __a_unused void *context)
1096 {
1097 int ret;
1098 enum exec_status exs = exec_status();
1099
1100 if (exs == EXEC_XCMD)
1101 return 0;
1102 if (window_update_needed()) {
1103 if (top.needs_update)
1104 assert(wnoutrefresh(top.win) == OK);
1105 if (bot.needs_update)
1106 assert(wnoutrefresh(bot.win) == OK);
1107 if (sep.needs_update)
1108 assert(wnoutrefresh(sep.win) == OK);
1109 if (sb.needs_update)
1110 assert(wnoutrefresh(sb.win) == OK);
1111 if (in.needs_update)
1112 assert(wnoutrefresh(in.win) == OK);
1113 doupdate();
1114 top.needs_update = bot.needs_update = sb.needs_update =
1115 in.needs_update = sep.needs_update = false;
1116 }
1117 ret = wgetch(top.win);
1118 if (ret == ERR)
1119 return 0;
1120 if (ret == KEY_RESIZE) {
1121 if (curses_active()) {
1122 shutdown_curses();
1123 init_curses();
1124 redraw_bot_win();
1125 }
1126 return 0;
1127 }
1128 if (exs == EXEC_IDLE)
1129 handle_command(ret);
1130 else if (exec_pid > 0)
1131 kill(exec_pid, SIGTERM);
1132 return 0;
1133 }
1134
1135 static void signal_pre_select(struct sched *s, void *context)
1136 {
1137 struct signal_task *st = context;
1138 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1139 }
1140
1141 static void print_scroll_msg(void)
1142 {
1143 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1144 int first_rbe = first_visible_rbe(&lines_total);
1145
1146 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1147 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1148 }
1149
1150 static void com_scroll_top(void)
1151 {
1152 int i = RINGBUFFER_SIZE - 1, bot_lines = get_num_lines(&bot);
1153 unsigned lines = 0;
1154
1155 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1156 i--;
1157 /* i is oldest entry */
1158 for (; lines < bot_lines && i >= 0; i--) {
1159 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1160 if (!rbe)
1161 break;
1162 lines += NUM_LINES(rbe->len);
1163 }
1164 i++;
1165 if (lines > 0 && scroll_position != i) {
1166 scroll_position = i;
1167 redraw_bot_win();
1168 print_scroll_msg();
1169 return;
1170 }
1171 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1172 }
1173
1174 static void com_cancel_scroll(void)
1175 {
1176
1177 if (scroll_position == 0) {
1178 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1179 return;
1180 }
1181 scroll_position = 0;
1182 redraw_bot_win();
1183 }
1184
1185 static void com_page_down(void)
1186 {
1187 unsigned lines = 0;
1188 int i = scroll_position, bot_lines = get_num_lines(&bot);
1189
1190 while (lines < bot_lines && --i > 0) {
1191 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1192 if (!rbe)
1193 break;
1194 lines += NUM_LINES(rbe->len);
1195 }
1196 if (lines) {
1197 scroll_position = i;
1198 redraw_bot_win();
1199 print_scroll_msg();
1200 return;
1201 }
1202 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1203 }
1204
1205 static void com_page_up(void)
1206 {
1207 unsigned lines;
1208 int fvr = first_visible_rbe(&lines), bot_lines = get_num_lines(&bot);
1209
1210 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1211 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1212 return;
1213 }
1214 scroll_position = fvr + 1;
1215 for (; scroll_position > 0; scroll_position--) {
1216 first_visible_rbe(&lines);
1217 if (lines == bot_lines)
1218 break;
1219 }
1220 redraw_bot_win();
1221 print_scroll_msg();
1222 }
1223
1224 static void com_scroll_down(void)
1225 {
1226 struct rb_entry *rbe;
1227 int rbe_lines, bot_lines = get_num_lines(&bot);
1228
1229 if (!scroll_position) {
1230 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1231 return;
1232 }
1233 scroll_position--;
1234 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1235 rbe_lines = NUM_LINES(rbe->len);
1236 wscrl(bot.win, rbe_lines);
1237 wmove(bot.win, bot_lines - rbe_lines, 0);
1238 wattron(bot.win, COLOR_PAIR(rbe->color));
1239 waddstr(bot.win, rbe->msg);
1240 refresh_window(&bot);
1241 print_scroll_msg();
1242 }
1243
1244 static void com_scroll_up(void)
1245 {
1246 struct rb_entry *rbe = NULL;
1247 unsigned lines;
1248 int i, first_rbe, num_scroll;
1249
1250 /* the entry that is going to vanish */
1251 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1252 if (!rbe)
1253 goto err_out;
1254 num_scroll = NUM_LINES(rbe->len);
1255 first_rbe = first_visible_rbe(&lines);
1256 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1257 goto err_out;
1258 scroll_position++;
1259 wscrl(bot.win, -num_scroll);
1260 i = draw_top_rbe(&lines);
1261 if (i < 0)
1262 goto err_out;
1263 while (i > 0 && lines < num_scroll) {
1264 int rbe_lines;
1265 rbe = ringbuffer_get(bot_win_rb, --i);
1266 if (!rbe)
1267 break;
1268 rbe_lines = NUM_LINES(rbe->len);
1269 lines += rbe_lines;
1270 wattron(bot.win, COLOR_PAIR(rbe->color));
1271 waddstr(bot.win, "\n");
1272 waddstr(bot.win, rbe->msg);
1273 if (!i)
1274 break;
1275 i--;
1276 }
1277 refresh_window(&bot);
1278 print_scroll_msg();
1279 return;
1280 err_out:
1281 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1282 }
1283
1284 static void com_ll_decr(void)
1285 {
1286 if (loglevel <= LL_DEBUG) {
1287 print_in_bar(COLOR_ERRMSG,
1288 "loglevel already at maximal verbosity\n");
1289 return;
1290 }
1291 loglevel--;
1292 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1293 }
1294
1295 static void com_ll_incr(void)
1296 {
1297 if (loglevel >= LL_EMERG) {
1298 print_in_bar(COLOR_ERRMSG,
1299 "loglevel already at minimal verbosity\n");
1300 return;
1301 }
1302 loglevel++;
1303 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1304 }
1305
1306 static void com_reread_conf(void)
1307 {
1308 reread_conf();
1309 }
1310
1311 static void com_help(void)
1312 {
1313 int i;
1314
1315 for (i = 0; i < conf.key_map_given; ++i) {
1316 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1317 const char *handler_text = "???", *desc = NULL;
1318
1319 if (!split_key_map(tmp, &handler, &arg)) {
1320 free(tmp);
1321 return;
1322 }
1323 switch (*handler) {
1324 case 'i':
1325 handler_text = "internal";
1326 desc = command_list[find_cmd_byname(arg)].description;
1327 break;
1328 case 'x': handler_text = "external"; break;
1329 case 'd': handler_text = "display "; break;
1330 case 'p': handler_text = "para "; break;
1331 }
1332 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1333 strlen(arg) < 8? "\t" : "",
1334 desc? desc : "");
1335 free(tmp);
1336 }
1337 for (i = 0; command_list[i].handler; i++) {
1338 struct gui_command gc = command_list[i];
1339
1340 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1341 strlen(gc.name) < 8? "\t" : "",
1342 gc.description);
1343 }
1344 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1345 "for more info");
1346 }
1347
1348 static void com_shrink_top_win(void)
1349 {
1350 int top_lines = get_num_lines(&top);
1351
1352 if (top_lines <= theme.top_lines_min) {
1353 PARA_WARNING_LOG("can not decrease top window\n");
1354 return;
1355 }
1356 init_wins(top_lines - 1);
1357 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1358 }
1359
1360 static void com_enlarge_top_win(void)
1361 {
1362 int top_lines = get_num_lines(&top), bot_lines = get_num_lines(&bot);
1363
1364 if (bot_lines < 3) {
1365 PARA_WARNING_LOG("can not increase top window\n");
1366 return;
1367 }
1368 init_wins(top_lines + 1);
1369 print_in_bar(COLOR_MSG, "increased top window");
1370 }
1371
1372 static void com_version(void)
1373 {
1374 print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1375 }
1376
1377 __noreturn static void com_quit(void)
1378 {
1379 die(EXIT_SUCCESS, "%s", "");
1380 }
1381
1382 static void com_refresh(void)
1383 {
1384 shutdown_curses();
1385 init_curses();
1386 }
1387
1388 static void com_next_theme(void)
1389 {
1390 theme_next(&theme);
1391 com_refresh();
1392 }
1393
1394 static void com_prev_theme(void)
1395 {
1396 theme_prev(&theme);
1397 com_refresh();
1398 }
1399
1400 __noreturn static void print_help_and_die(void)
1401 {
1402 struct ggo_help h = DEFINE_GGO_HELP(gui);
1403 bool d = conf.detailed_help_given;
1404
1405 ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1406 exit(0);
1407 }
1408
1409 static int setup_tasks_and_schedule(void)
1410 {
1411 struct exec_task exec_task = {.task = NULL};
1412 struct status_task status_task = {.fd = -1};
1413 struct input_task input_task = {.task = NULL};
1414 struct signal_task signal_task = {.task = NULL};
1415 struct sched sched = {
1416 .default_timeout = {
1417 .tv_sec = conf.timeout_arg / 1000,
1418 .tv_usec = (conf.timeout_arg % 1000) * 1000,
1419 },
1420 };
1421
1422 exec_task.task = task_register(&(struct task_info) {
1423 .name = "exec",
1424 .pre_select = exec_pre_select,
1425 .post_select = exec_post_select,
1426 .context = &exec_task,
1427 }, &sched);
1428
1429 status_task.task = task_register(&(struct task_info) {
1430 .name = "status",
1431 .pre_select = status_pre_select,
1432 .post_select = status_post_select,
1433 .context = &status_task,
1434 }, &sched);
1435
1436 input_task.task = task_register(&(struct task_info) {
1437 .name = "input",
1438 .pre_select = input_pre_select,
1439 .post_select = input_post_select,
1440 .context = &input_task,
1441 }, &sched);
1442
1443 signal_task.fd = para_signal_init();
1444 para_install_sighandler(SIGINT);
1445 para_install_sighandler(SIGTERM);
1446 para_install_sighandler(SIGCHLD);
1447 para_install_sighandler(SIGUSR1);
1448 signal_task.task = task_register(&(struct task_info) {
1449 .name = "signal",
1450 .pre_select = signal_pre_select,
1451 .post_select = signal_post_select,
1452 .context = &signal_task,
1453 }, &sched);
1454 return schedule(&sched);
1455 }
1456
1457 /**
1458 * The main function of para_gui.
1459 *
1460 * \param argc Usual argument count.
1461 * \param argv Usual argument vector.
1462 *
1463 * After initialization para_gui registers the following tasks to the paraslash
1464 * scheduler: status, exec, signal, input.
1465 *
1466 * The status task executes the para_audioc stat command to obtain the status
1467 * of para_server and para_audiod, and displays this information in the top
1468 * window of para_gui.
1469 *
1470 * The exec task is responsible for printing the output of the currently
1471 * running executable to the bottom window.
1472 *
1473 * The signal task performs suitable actions according to any signals received.
1474 * For example it refreshes all windows on terminal size changes and resets the
1475 * terminal on \p SIGTERM.
1476 *
1477 * The input task reads single key strokes from stdin. For each key pressed, it
1478 * executes the command handler associated with this key.
1479 *
1480 * \return \p EXIT_SUCCESS or \p EXIT_FAILURE.
1481 */
1482 int main(int argc, char *argv[])
1483 {
1484 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1485 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1486 version_handle_flag("gui", conf.version_given);
1487 if (conf.help_given || conf.detailed_help_given)
1488 print_help_and_die();
1489 parse_config_file_or_die(false /* override */);
1490 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1491 setlocale(LC_CTYPE, "");
1492 initscr(); /* needed only once, always successful */
1493 init_curses();
1494 return setup_tasks_and_schedule() < 0? EXIT_FAILURE : EXIT_SUCCESS;
1495 }