e4849fbab3f622ea160494bf7bbc9bdc653337cc
[paraslash.git] / gui.c
1 /*
2 * Copyright (C) 1998-2014 Andre Noll <maan@systemlinux.org>
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 int signal_pipe;
34
35 static struct gui_window {
36 WINDOW *win;
37 size_t begx;
38 size_t begy;
39 size_t cols;
40 size_t lines;
41 } top, bot, sb, in, sep;
42
43 #define RINGBUFFER_SIZE 512
44 struct rb_entry {
45 char *msg;
46 size_t len;
47 int color;
48 };
49 static struct ringbuffer *bot_win_rb;
50 #define NUM_LINES(len) (1 + (len) / bot.cols)
51
52 static unsigned scroll_position;
53
54 static bool curses_active;
55 static pid_t cmd_pid;
56
57 static int command_fds[2] = {-1, -1};
58 static int stat_pipe = -1;
59 static struct gui_args_info conf;
60
61 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
62
63
64 /**
65 * Codes for various colors.
66 *
67 * Each status item has its own color pair. The ones defined here start at a
68 * higher number so that they do not overlap with these.
69 */
70 enum gui_color_pair {
71 COLOR_STATUSBAR = NUM_STAT_ITEMS + 1,
72 COLOR_COMMAND,
73 COLOR_OUTPUT,
74 COLOR_MSG,
75 COLOR_ERRMSG,
76 COLOR_WELCOME,
77 COLOR_SEPARATOR,
78 COLOR_TOP,
79 COLOR_BOT,
80 };
81
82 struct gui_command {
83 const char *key;
84 const char *name;
85 const char *description;
86 void (*handler)(void);
87 };
88
89 static struct gui_theme theme;
90
91 static int _argc;
92 static char **_argv;
93
94 static void com_help(void);
95 static void com_reread_conf(void);
96 static void com_enlarge_top_win(void);
97 static void com_shrink_top_win(void);
98 static void com_version(void);
99 __noreturn static void com_quit(void);
100 static void com_refresh(void);
101 static void com_ll_incr(void);
102 static void com_ll_decr(void);
103 static void com_prev_theme(void);
104 static void com_next_theme(void);
105 static void com_scroll_up(void);
106 static void com_scroll_down(void);
107 static void com_page_up(void);
108 static void com_page_down(void);
109 static void com_cancel_scrolling(void);
110 static void com_scroll_top(void);
111
112 static struct gui_command command_list[] = {
113 {
114 .key = "?",
115 .name = "help",
116 .description = "print help",
117 .handler = com_help
118 }, {
119 .key = "+",
120 .name = "enlarge_win",
121 .description = "enlarge the top window",
122 .handler = com_enlarge_top_win
123 }, {
124 .key = "-",
125 .name = "shrink_win",
126 .description = "shrink the top window",
127 .handler = com_shrink_top_win
128 }, {
129 .key = "r",
130 .name = "reread_conf",
131 .description = "reread configuration file",
132 .handler = com_reread_conf
133 }, {
134 .key = "q",
135 .name = "quit",
136 .description = "exit para_gui",
137 .handler = com_quit
138 }, {
139 .key = "^L",
140 .name = "refresh",
141 .description = "redraw the screen",
142 .handler = com_refresh
143 }, {
144 .key = ".",
145 .name = "next_theme",
146 .description = "switch to next theme",
147 .handler = com_next_theme
148 }, {
149 .key = ",",
150 .name = "prev_theme",
151 .description = "switch to previous stream",
152 .handler = com_prev_theme
153 }, {
154 .key = ">",
155 .name = "ll_incr",
156 .description = "increase loglevel (decreases verbosity)",
157 .handler = com_ll_incr
158 }, {
159 .key = "<",
160 .name = "ll_decr",
161 .description = "decrease loglevel (increases verbosity)",
162 .handler = com_ll_decr
163 }, {
164 .key = "V",
165 .name = "version",
166 .description = "show the para_gui version",
167 .handler = com_version
168 }, {
169 .key = "<up>",
170 .name = "scroll_up",
171 .description = "scroll up one line",
172 .handler = com_scroll_up
173 }, {
174 .key = "<down>",
175 .name = "scroll_down",
176 .description = "scroll down one line",
177 .handler = com_scroll_down
178 }, {
179 .key = "<ppage>",
180 .name = "page_up",
181 .description = "scroll up one page",
182 .handler = com_page_up
183 }, {
184 .key = "<npage>",
185 .name = "page_down",
186 .description = "scroll down one page",
187 .handler = com_page_down
188 }, {
189 .key = "<home>",
190 .name = "scroll_top",
191 .description = "scroll to top of buffer",
192 .handler = com_scroll_top
193 }, {
194 .key = "<end>",
195 .name = "cancel_scroll",
196 .description = "deactivate scroll mode",
197 .handler = com_cancel_scrolling
198 }, {
199 .handler = NULL
200 }
201 };
202
203 static int find_cmd_byname(char *name)
204 {
205 int i;
206
207 for (i = 0; command_list[i].handler; i++)
208 if (!strcmp(command_list[i].name, name))
209 return i;
210 return -1;
211 }
212
213 /* taken from mutt */
214 static char *km_keyname(int c)
215 {
216 static char buf[10];
217
218 if (c == KEY_UP) {
219 sprintf(buf, "<up>");
220 return buf;
221 }
222 if (c == KEY_DOWN) {
223 sprintf(buf, "<down>");
224 return buf;
225 }
226 if (c == KEY_LEFT) {
227 sprintf(buf, "<left>");
228 return buf;
229 }
230 if (c == KEY_RIGHT) {
231 sprintf(buf, "<right>");
232 return buf;
233 }
234 if (c == KEY_NPAGE) {
235 sprintf(buf, "<npage>");
236 return buf;
237 }
238 if (c == KEY_PPAGE) {
239 sprintf(buf, "<ppage>");
240 return buf;
241 }
242 if (c == KEY_HOME) {
243 sprintf(buf, "<home>");
244 return buf;
245 }
246 if (c == KEY_END) {
247 sprintf(buf, "<end>");
248 return buf;
249 }
250 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
251 if (c < 0)
252 c += 256;
253 if (c < 128) {
254 buf[0] = '^';
255 buf[1] = (c + '@') & 0x7f;
256 buf[2] = 0;
257 } else
258 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
259 (c >> 3) & 7, c & 7);
260 } else if (c >= KEY_F0 && c < KEY_F(256))
261 sprintf(buf, "<F%d>", c - KEY_F0);
262 else if (isprint(c))
263 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
264 else
265 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
266 return buf;
267 }
268
269 static char *configfile_exists(void)
270 {
271 static char *config_file;
272 char *tmp;
273
274 if (!conf.config_file_given) {
275 if (!config_file) {
276 char *home = para_homedir();
277 config_file = make_message("%s/.paraslash/gui.conf",
278 home);
279 free(home);
280 }
281 tmp = config_file;
282 } else
283 tmp = conf.config_file_arg;
284 return file_exists(tmp)? tmp: NULL;
285 }
286
287 /* Print given number of spaces to curses window. */
288 static void add_spaces(WINDOW* win, unsigned int num)
289 {
290 char space[] = " ";
291 unsigned sz = sizeof(space) - 1; /* number of spaces */
292
293 while (num >= sz) {
294 waddstr(win, space);
295 num -= sz;
296 }
297 if (num > 0) {
298 assert(num < sz);
299 space[num] = '\0';
300 waddstr(win, space);
301 }
302 }
303
304 /*
305 * print aligned string to curses window. This function always prints
306 * exactly len chars.
307 */
308 static int align_str(WINDOW* win, char *str, unsigned int len,
309 unsigned int align)
310 {
311 int ret, i, num; /* of spaces */
312 size_t width;
313
314 if (!win || !str)
315 return 0;
316 ret = strwidth(str, &width);
317 if (ret < 0) {
318 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
319 width = 0;
320 str[0] = '\0';
321 }
322 num = len - width;
323 if (num < 0) {
324 str[len] = '\0';
325 num = 0;
326 }
327 /* replace control characters by spaces */
328 for (i = 0; i < len && str[i]; i++) {
329 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
330 str[i] = ' ';
331 }
332 if (align == LEFT) {
333 waddstr(win, str);
334 add_spaces(win, num);
335 } else if (align == RIGHT) {
336 add_spaces(win, num);
337 waddstr(win, str);
338 } else {
339 add_spaces(win, num / 2);
340 waddstr(win, str[0]? str: "");
341 add_spaces(win, num - num / 2);
342 }
343 return 1;
344 }
345
346 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
347 {
348 char *msg;
349 va_list ap;
350
351 if (!curses_active)
352 return;
353 wattron(in.win, COLOR_PAIR(color));
354 va_start(ap, fmt);
355 xvasprintf(&msg, fmt, ap);
356 va_end(ap);
357 wmove(in.win, 0, 0);
358 align_str(in.win, msg, in.cols, LEFT);
359 free(msg);
360 wrefresh(in.win);
361 }
362
363 /*
364 * update the status bar
365 */
366 static void print_status_bar(void)
367 {
368 char *tmp;
369
370 if (!curses_active)
371 return;
372 tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
373 wmove(sb.win, 0, 0);
374 align_str(sb.win, tmp, sb.cols, CENTER);
375 free(tmp);
376 wrefresh(sb.win);
377 }
378
379 /*
380 * get the number of the oldest rbe that is (partially) visible. On return,
381 * lines contains the sum of the number of lines of all visible entries. If the
382 * first one is only partially visible, lines is greater than bot.lines.
383 */
384 static int first_visible_rbe(unsigned *lines)
385 {
386 int i;
387 *lines = 0;
388 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
389 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
390 int rbe_lines;
391 if (!rbe)
392 return i - 1;
393 // fprintf(stderr, "found: %s\n", rbe->msg);
394 rbe_lines = NUM_LINES(rbe->len);
395 if (rbe_lines > bot.lines)
396 return -1;
397 *lines += rbe_lines;
398 if (*lines >= bot.lines)
399 return i;
400 }
401 return RINGBUFFER_SIZE - 1;
402 }
403
404 /*
405 returns number of first visible rbe, *lines is the number of lines drawn.
406 */
407 static int draw_top_rbe(unsigned *lines)
408 {
409 int ret, fvr = first_visible_rbe(lines);
410 struct rb_entry *rbe;
411 size_t bytes_to_skip, cells_to_skip, width;
412
413 if (fvr < 0)
414 return -1;
415 wmove(bot.win, 0, 0);
416 rbe = ringbuffer_get(bot_win_rb, fvr);
417 if (!rbe)
418 return -1;
419 if (*lines > bot.lines) {
420 /* rbe is partially visible multi-line */
421 cells_to_skip = (*lines - bot.lines) * bot.cols;
422 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
423 if (ret < 0)
424 return ret;
425 ret = strwidth(rbe->msg + bytes_to_skip, &width);
426 if (ret < 0)
427 return ret;
428 } else {
429 bytes_to_skip = 0;
430 width = rbe->len;
431 }
432 wattron(bot.win, COLOR_PAIR(rbe->color));
433 waddstr(bot.win, rbe->msg + bytes_to_skip);
434 *lines = NUM_LINES(width);
435 return fvr;
436 }
437
438 static void redraw_bot_win(void)
439 {
440 unsigned lines;
441 int i;
442
443 wmove(bot.win, 0, 0);
444 wclear(bot.win);
445 i = draw_top_rbe(&lines);
446 if (i <= 0)
447 goto out;
448 while (i > 0 && lines < bot.lines) {
449 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
450 if (!rbe) {
451 lines++;
452 waddstr(bot.win, "\n");
453 continue;
454 }
455 lines += NUM_LINES(rbe->len);
456 wattron(bot.win, COLOR_PAIR(rbe->color));
457 waddstr(bot.win, "\n");
458 waddstr(bot.win, rbe->msg);
459 }
460 out:
461 wrefresh(bot.win);
462 }
463
464 static void rb_add_entry(int color, char *msg)
465 {
466 struct rb_entry *old, *new;
467 int x, y;
468 size_t len;
469
470 if (strwidth(msg, &len) < 0)
471 return;
472 new = para_malloc(sizeof(struct rb_entry));
473 new->color = color;
474 new->len = len;
475 new->msg = msg;
476 old = ringbuffer_add(bot_win_rb, new);
477 // fprintf(stderr, "added: %s\n", new->msg);
478 if (old) {
479 free(old->msg);
480 free(old);
481 }
482 if (scroll_position) {
483 /* discard current scrolling, like xterm does */
484 scroll_position = 0;
485 redraw_bot_win();
486 return;
487 }
488 wattron(bot.win, COLOR_PAIR(color));
489 getyx(bot.win, y, x);
490 if (y || x)
491 waddstr(bot.win, "\n");
492 waddstr(bot.win, msg);
493 }
494
495 /*
496 * print formated output to bot win and refresh
497 */
498 __printf_2_3 static void outputf(int color, const char* fmt,...)
499 {
500 char *msg;
501 va_list ap;
502
503 if (!curses_active)
504 return;
505 va_start(ap, fmt);
506 xvasprintf(&msg, fmt, ap);
507 va_end(ap);
508 rb_add_entry(color, msg);
509 wrefresh(bot.win);
510 }
511
512 static int add_output_line(char *line, void *data)
513 {
514 int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
515
516 if (!curses_active)
517 return 1;
518 rb_add_entry(color, para_strdup(line));
519 return 1;
520 }
521
522 static int loglevel;
523
524 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
525 {
526 int color;
527 char *msg;
528 va_list ap;
529
530 if (ll < loglevel || !curses_active)
531 return;
532 switch (ll) {
533 case LL_DEBUG:
534 case LL_INFO:
535 case LL_NOTICE:
536 color = COLOR_MSG;
537 break;
538 default:
539 color = COLOR_ERRMSG;
540 }
541 va_start(ap, fmt);
542 xvasprintf(&msg, fmt, ap);
543 va_end(ap);
544 chop(msg);
545 rb_add_entry(color, msg);
546 wrefresh(bot.win);
547 }
548 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
549
550 static void setup_signal_handling(void)
551 {
552 signal_pipe = para_signal_init();
553 para_install_sighandler(SIGINT);
554 para_install_sighandler(SIGTERM);
555 para_install_sighandler(SIGCHLD);
556 para_install_sighandler(SIGWINCH);
557 para_install_sighandler(SIGUSR1);
558 }
559
560 /* kill every process in the process group and exit */
561 __noreturn static void kill_pg_and_die(int ret)
562 {
563 para_sigaction(SIGTERM, SIG_IGN);
564 kill(0, SIGTERM);
565 exit(ret);
566 }
567
568 static void shutdown_curses(void)
569 {
570 if (!curses_active)
571 return;
572 def_prog_mode();
573 curses_active = false;
574 endwin();
575 }
576
577 __noreturn static void finish(int ret)
578 {
579 shutdown_curses();
580 kill_pg_and_die(ret);
581 }
582
583 /*
584 * exit curses and print given message to stdout/stderr
585 */
586 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
587 {
588 va_list argp;
589 FILE *outfd = ret? stderr: stdout;
590
591 shutdown_curses();
592 va_start(argp, fmt);
593 vfprintf(outfd, fmt, argp);
594 va_end(argp);
595 kill_pg_and_die(ret);
596 }
597
598 static void print_welcome(void)
599 {
600 if (loglevel > LL_NOTICE)
601 return;
602 outputf(COLOR_WELCOME, "Welcome to %s. Theme: %s",
603 version_single_line("gui"), theme.name);
604 wclrtoeol(bot.win);
605 }
606
607 /*
608 * init all windows
609 */
610 static void init_wins(int top_lines)
611 {
612 int i;
613
614 top.lines = top_lines;
615 top.cols = COLS;
616 top.begy = 0;
617 top.begx = 0;
618
619 bot.lines = LINES - top.lines - 3;
620 bot.cols = COLS;
621 bot.begy = top.lines + 1;
622 bot.begx = 0;
623
624 sb.lines = 1;
625 sb.cols = COLS;
626 sb.begy = LINES - 2;
627 sb.begx = 0;
628
629 in.lines = 1;
630 in.cols = COLS;
631 in.begy = LINES - 1;
632 in.begx = 0;
633
634 sep.lines = 1;
635 sep.cols = COLS;
636 sep.begy = top.lines;
637 sep.begx = 0;
638
639 assume_default_colors(theme.default_fg, theme.default_bg);
640 if (top.win) {
641 mvwin(top.win, top.begy, top.begx);
642 wresize(top.win, top.lines, top.cols);
643
644 mvwin(sb.win, sb.begy, sb.begx);
645 wresize(sb.win, sb.lines, sb.cols);
646
647 mvwin(sep.win, sep.begy, sep.begx);
648 wresize(sep.win, sep.lines, sep.cols);
649
650 mvwin(bot.win, bot.begy, bot.begx);
651 wresize(bot.win, bot.lines, bot.cols);
652
653 mvwin(in.win, in.begy, in.begx);
654 wresize(in.win, in.lines, in.cols);
655 } else {
656 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
657 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
658 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
659 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
660 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
661 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
662 msg_n_exit(1, "Error: Cannot create curses windows\n");
663 wclear(bot.win);
664 wclear(sb.win);
665 wclear(in.win);
666 scrollok(bot.win, 1);
667 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
668 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
669 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
670 wattron(top.win, COLOR_PAIR(COLOR_TOP));
671 nodelay(top.win, 1);
672 nodelay(bot.win, 1);
673 nodelay(sb.win, 1);
674 nodelay(in.win, 0);
675
676 keypad(top.win, 1);
677 keypad(bot.win, 1);
678 keypad(sb.win, 1);
679 keypad(in.win, 1);
680 }
681 wmove(sep.win, 0, 0);
682 for (i = 1; i <= COLS; i++)
683 waddstr(sep.win, theme.sep_str);
684 wclear(top.win);
685 //wclear(bot.win);
686 wnoutrefresh(top.win);
687 wnoutrefresh(bot.win);
688 //wnoutrefresh(sb.win);
689 print_status_bar();
690 wnoutrefresh(in.win);
691 wnoutrefresh(sep.win);
692 doupdate();
693 }
694
695 /*
696 * Print stat item #i to curses window
697 */
698 static void print_stat_item(int i)
699 {
700 char *tmp;
701 struct stat_item_data d = theme.data[i];
702 char *c = stat_content[i];
703
704 if (!curses_active || !d.len || !c)
705 return;
706 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
707 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
708 wrefresh(top.win);
709 wattron(top.win, COLOR_PAIR(i + 1));
710 align_str(top.win, tmp, d.len * COLS / 100, d.align);
711 free(tmp);
712 wrefresh(top.win);
713 }
714
715 static int update_item(int item_num, char *buf)
716 {
717 char **c = stat_content + item_num;
718
719 free(*c);
720 if (buf && buf[0])
721 goto dup;
722 switch (item_num) {
723 case SI_ARTIST:
724 *c = para_strdup("(artist tag not set)");
725 goto print;
726 case SI_TITLE:
727 *c = para_strdup("(title tag not set)");
728 goto print;
729 case SI_YEAR:
730 *c = para_strdup("????");
731 goto print;
732 case SI_ALBUM:
733 *c = para_strdup("(album tag not set)");
734 goto print;
735 case SI_COMMENT:
736 *c = para_strdup("(comment tag not set)");
737 goto print;
738 }
739 dup:
740 *c = para_strdup(buf);
741 print:
742 print_stat_item(item_num);
743 return 1;
744 }
745
746 static int read_stat_pipe(fd_set *rfds)
747 {
748 static char *buf;
749 static int bufsize, loaded;
750 int ret, ret2;
751 size_t sz;
752
753 if (stat_pipe < 0)
754 return 0;
755 if (loaded >= bufsize) {
756 if (bufsize > 1000 * 1000) {
757 loaded = 0;
758 return 0;
759 }
760 bufsize += bufsize + 1000;
761 buf = para_realloc(buf, bufsize);
762 }
763 assert(loaded < bufsize);
764 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
765 rfds, &sz);
766 loaded += sz;
767 ret2 = for_each_stat_item(buf, loaded, update_item);
768 if (ret < 0 || ret2 < 0) {
769 loaded = 0;
770 return ret2 < 0? ret2 : ret;
771 }
772 sz = ret2; /* what is left */
773 if (sz > 0 && sz < loaded)
774 memmove(buf, buf + loaded - sz, sz);
775 loaded = sz;
776 return 1;
777 }
778
779 static void print_all_items(void)
780 {
781 int i;
782
783 if (!curses_active)
784 return;
785 FOR_EACH_STATUS_ITEM(i)
786 print_stat_item(i);
787 }
788
789 static void clear_all_items(void)
790 {
791 int i;
792
793 FOR_EACH_STATUS_ITEM(i) {
794 free(stat_content[i]);
795 stat_content[i] = para_strdup("");
796 }
797 }
798
799 static void init_pair_or_die(short pair, short f, short b)
800 {
801 if (init_pair(pair, f, b) == ERR)
802 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
803 }
804
805 static void init_colors_or_die(void)
806 {
807 int i;
808
809 if (!has_colors())
810 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
811 if (start_color() == ERR)
812 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
813 FOR_EACH_STATUS_ITEM(i)
814 if (theme.data[i].len)
815 init_pair_or_die(i + 1, theme.data[i].fg,
816 theme.data[i].bg);
817 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
818 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
819 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
820 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
821 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
822 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
823 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
824 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
825 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
826 }
827
828 /* (Re-)initialize the curses library. */
829 static void init_curses(void)
830 {
831 curses_active = true;
832 if (top.win && refresh() == ERR) /* refresh is really needed */
833 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
834 if (LINES < theme.lines_min || COLS < theme.cols_min)
835 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
836 " (need at least %dx%d)\n", COLS, LINES,
837 theme.cols_min, theme.lines_min);
838 curs_set(0); /* make cursor invisible, ignore errors */
839 nonl(); /* do not NL->CR/NL on output, always returns OK */
840 /* don't echo input */
841 if (noecho() == ERR)
842 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
843 /* take input chars one at a time, no wait for \n */
844 if (cbreak() == ERR)
845 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
846 init_colors_or_die();
847 clear(); /* ignore non-fatal errors */
848 init_wins(theme.top_lines_default);
849 print_all_items();
850 // noecho(); /* don't echo input */
851 }
852
853 static void check_sigchld(void)
854 {
855 int ret;
856 pid_t pid;
857
858 reap_next_child:
859 ret = para_reap_child(&pid);
860 if (ret <= 0)
861 return;
862 if (pid == cmd_pid)
863 cmd_pid = 0;
864 goto reap_next_child;
865 }
866
867 /*
868 * This sucker modifies its first argument. *handler and *arg are
869 * pointers to 0-terminated strings (inside line). Crap.
870 */
871 static int split_key_map(char *line, char **handler, char **arg)
872 {
873 if (!(*handler = strchr(line + 1, ':')))
874 goto err_out;
875 **handler = '\0';
876 (*handler)++;
877 if (!(*arg = strchr(*handler, ':')))
878 goto err_out;
879 **arg = '\0';
880 (*arg)++;
881 return 1;
882 err_out:
883 return 0;
884 }
885
886 static int check_key_map_args(void)
887 {
888 char *s;
889 int i, ret = -1;
890 char *tmp = NULL, *handler, *arg;
891
892 for (i = 0; i < conf.key_map_given; ++i) {
893 s = conf.key_map_arg[i];
894 if (!(*s))
895 goto out;
896 free(tmp);
897 tmp = para_strdup(s);
898 if (!split_key_map(tmp, &handler, &arg))
899 goto out;
900 if (strlen(handler) != 1)
901 goto out;
902 if (*handler != 'x'
903 && *handler != 'd'
904 && *handler != 'i'
905 && *handler != 'p')
906 goto out;
907 if (*handler != 'i')
908 continue;
909 if (find_cmd_byname(arg) < 0)
910 goto out;
911 }
912 ret = 0;
913 out:
914 free(tmp);
915 return ret;
916 }
917
918 /*
919 * React to various signal-related events
920 */
921 static void handle_signal(int sig)
922 {
923 switch (sig) {
924 case SIGTERM:
925 msg_n_exit(EXIT_FAILURE,
926 "only the good die young (caught SIGTERM))\n");
927 return;
928 case SIGWINCH:
929 if (curses_active) {
930 shutdown_curses();
931 init_curses();
932 redraw_bot_win();
933 }
934 return;
935 case SIGINT:
936 PARA_WARNING_LOG("caught SIGINT, reset\n");
937 /* Nothing to do. SIGINT killed our child which gets noticed
938 * by do_select and resets everything.
939 */
940 return;
941 case SIGUSR1:
942 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
943 com_reread_conf();
944 return;
945 case SIGCHLD:
946 check_sigchld();
947 return;
948 }
949 }
950
951 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
952 {
953 static struct timeval next_exec, atm, diff;
954 int ret, fds[3] = {0, 1, 0};
955 pid_t pid;
956
957 if (stat_pipe >= 0)
958 goto success;
959 /* Avoid busy loop */
960 gettimeofday(&atm, NULL);
961 if (tv_diff(&next_exec, &atm, &diff) > 0) {
962 if (tv_diff(&diff, tv, NULL) < 0)
963 *tv = diff;
964 return;
965 }
966 next_exec.tv_sec = atm.tv_sec + 2;
967 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
968 if (ret < 0)
969 return;
970 ret = mark_fd_nonblocking(fds[1]);
971 if (ret < 0) {
972 close(fds[1]);
973 return;
974 }
975 stat_pipe = fds[1];
976 success:
977 para_fd_set(stat_pipe, rfds, max_fileno);
978 }
979
980 #define COMMAND_BUF_SIZE 32768
981
982 /*
983 * This is the core select loop. Besides the (internal) signal
984 * pipe, the following other fds are checked according to the mode:
985 *
986 * GETCH_MODE: check stdin, return when key is pressed
987 *
988 * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
989 * stdout and stderr or when any key is pressed.
990 *
991 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
992 * is running. During that time curses is disabled. Returns when
993 * cmd_pid == 0.
994 */
995 static int do_select(int mode)
996 {
997 fd_set rfds;
998 int ret, i, max_fileno;
999 char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
1000 int cbo[2] = {0, 0}; /* command buf offsets */
1001 struct timeval tv;
1002 unsigned flags[2] = {0, 0}; /* for for_each_line() */
1003
1004 repeat:
1005 tv.tv_sec = conf.timeout_arg / 1000;
1006 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
1007 // ret = refresh_status();
1008 FD_ZERO(&rfds);
1009 max_fileno = 0;
1010 status_pre_select(&rfds, &max_fileno, &tv);
1011 /* signal pipe */
1012 para_fd_set(signal_pipe, &rfds, &max_fileno);
1013 /* command pipe only for COMMAND_MODE */
1014 if (mode == COMMAND_MODE) {
1015 if (command_fds[0] >= 0)
1016 para_fd_set(command_fds[0], &rfds, &max_fileno);
1017 if (command_fds[1] >= 0)
1018 para_fd_set(command_fds[1], &rfds, &max_fileno);
1019 }
1020 if (mode == GETCH_MODE || mode == COMMAND_MODE)
1021 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
1022 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1023 if (ret <= 0)
1024 goto check_return; /* skip fd checks */
1025 /* signals */
1026 ret = para_next_signal(&rfds);
1027 if (ret > 0)
1028 handle_signal(ret);
1029 /* read command pipe if ready */
1030 if (mode == COMMAND_MODE) {
1031 for (i = 0; i < 2; i++) {
1032 size_t sz;
1033 if (command_fds[i] < 0)
1034 continue;
1035 ret = read_nonblock(command_fds[i],
1036 command_buf[i] + cbo[i],
1037 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1038 cbo[i] += sz;
1039 sz = cbo[i];
1040 cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1041 add_output_line, &i);
1042 if (sz != cbo[i]) { /* at least one line found */
1043 wrefresh(bot.win);
1044 flags[i] = 0;
1045 }
1046 if (ret < 0) {
1047 PARA_NOTICE_LOG("closing command fd %d: %s\n",
1048 i, para_strerror(-ret));
1049 close(command_fds[i]);
1050 command_fds[i] = -1;
1051 flags[i] = 0;
1052 cbo[i] = 0;
1053 if (command_fds[!i] < 0) /* both fds closed */
1054 return 0;
1055 }
1056 if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1057 PARA_NOTICE_LOG("discarding overlong line\n");
1058 cbo[i] = 0;
1059 flags[i] = FELF_DISCARD_FIRST;
1060 }
1061 }
1062 }
1063 ret = read_stat_pipe(&rfds);
1064 if (ret < 0) {
1065 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1066 close(stat_pipe);
1067 stat_pipe = -1;
1068 clear_all_items();
1069 free(stat_content[SI_BASENAME]);
1070 stat_content[SI_BASENAME] =
1071 para_strdup("stat command terminated!?");
1072 print_all_items();
1073 }
1074 check_return:
1075 switch (mode) {
1076 case COMMAND_MODE:
1077 ret = wgetch(top.win);
1078 if (ret != ERR && ret != KEY_RESIZE) {
1079 if (cmd_pid)
1080 kill(cmd_pid, SIGTERM);
1081 return -1;
1082 }
1083 break;
1084 case GETCH_MODE:
1085 ret = wgetch(top.win);
1086 if (ret != ERR && ret != KEY_RESIZE)
1087 return ret;
1088 break;
1089 case EXTERNAL_MODE:
1090 if (cmd_pid == 0)
1091 return 0;
1092 }
1093 goto repeat;
1094 }
1095
1096 /* read from command pipe and print data to bot window */
1097 static void exec_and_display_cmd(const char *cmd)
1098 {
1099 int ret, fds[3] = {0, 1, 1};
1100
1101 outputf(COLOR_COMMAND, "%s", cmd);
1102 ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1103 if (ret < 0)
1104 return;
1105 ret = mark_fd_nonblocking(fds[1]);
1106 if (ret < 0)
1107 goto fail;
1108 ret = mark_fd_nonblocking(fds[2]);
1109 if (ret < 0)
1110 goto fail;
1111 command_fds[0] = fds[1];
1112 command_fds[1] = fds[2];
1113 if (do_select(COMMAND_MODE) >= 0)
1114 PARA_INFO_LOG("command complete\n");
1115 else
1116 PARA_NOTICE_LOG("command aborted\n");
1117 print_in_bar(COLOR_MSG, " ");
1118 return;
1119 fail:
1120 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1121 close(command_fds[0]);
1122 close(command_fds[1]);
1123 }
1124
1125 static void para_cmd(char *cmd)
1126 {
1127 char *c;
1128
1129 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1130 c = make_message(BINDIR "/para_client -- %s", cmd);
1131 exec_and_display_cmd(c);
1132 free(c);
1133 }
1134
1135 static void display_cmd(char *cmd)
1136 {
1137 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1138 exec_and_display_cmd(cmd);
1139 }
1140
1141 /*
1142 * shutdown curses and stat pipe before executing external commands
1143 */
1144 static void external_cmd(char *cmd)
1145 {
1146 int fds[3] = {-1, -1, -1};
1147
1148 if (cmd_pid)
1149 return;
1150 shutdown_curses();
1151 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1152 return;
1153 do_select(EXTERNAL_MODE);
1154 init_curses();
1155 }
1156
1157 static void print_scroll_msg(void)
1158 {
1159 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1160 int first_rbe = first_visible_rbe(&lines_total);
1161
1162 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1163 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1164 }
1165
1166 static void com_scroll_top(void)
1167 {
1168 int i = RINGBUFFER_SIZE - 1;
1169 unsigned lines = 0;
1170
1171 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1172 i--;
1173 /* i is oldest entry */
1174 for (; lines < bot.lines && i >= 0; i--) {
1175 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1176 if (!rbe)
1177 break;
1178 lines += NUM_LINES(rbe->len);
1179 }
1180 i++;
1181 if (lines > 0 && scroll_position != i) {
1182 scroll_position = i;
1183 redraw_bot_win();
1184 print_scroll_msg();
1185 return;
1186 }
1187 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1188 }
1189
1190 static void com_cancel_scrolling(void)
1191 {
1192
1193 if (scroll_position == 0) {
1194 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1195 return;
1196 }
1197 scroll_position = 0;
1198 redraw_bot_win();
1199 }
1200
1201 static void com_page_down(void)
1202 {
1203 unsigned lines = 0;
1204 int i = scroll_position;
1205
1206 while (lines < bot.lines && --i > 0) {
1207 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1208 if (!rbe)
1209 break;
1210 lines += NUM_LINES(rbe->len);
1211 }
1212 if (lines) {
1213 scroll_position = i;
1214 redraw_bot_win();
1215 print_scroll_msg();
1216 return;
1217 }
1218 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1219 }
1220
1221 static void com_page_up(void)
1222 {
1223 unsigned lines;
1224 int fvr = first_visible_rbe(&lines);
1225
1226 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1227 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1228 return;
1229 }
1230 scroll_position = fvr + 1;
1231 for (; scroll_position > 0; scroll_position--) {
1232 first_visible_rbe(&lines);
1233 if (lines == bot.lines)
1234 break;
1235 }
1236 redraw_bot_win();
1237 print_scroll_msg();
1238 }
1239
1240 static void com_scroll_down(void)
1241 {
1242 struct rb_entry *rbe;
1243 int rbe_lines;
1244
1245 if (!scroll_position) {
1246 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1247 return;
1248 }
1249 scroll_position--;
1250 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1251 rbe_lines = NUM_LINES(rbe->len);
1252 wscrl(bot.win, rbe_lines);
1253 wmove(bot.win, bot.lines - rbe_lines, 0);
1254 wattron(bot.win, COLOR_PAIR(rbe->color));
1255 waddstr(bot.win, rbe->msg);
1256 wrefresh(bot.win);
1257 print_scroll_msg();
1258 }
1259
1260 static void com_scroll_up(void)
1261 {
1262 struct rb_entry *rbe = NULL;
1263 unsigned lines;
1264 int i, first_rbe, num_scroll;
1265
1266 /* the entry that is going to vanish */
1267 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1268 if (!rbe)
1269 goto err_out;
1270 num_scroll = NUM_LINES(rbe->len);
1271 first_rbe = first_visible_rbe(&lines);
1272 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1273 goto err_out;
1274 scroll_position++;
1275 wscrl(bot.win, -num_scroll);
1276 i = draw_top_rbe(&lines);
1277 if (i < 0)
1278 goto err_out;
1279 while (i > 0 && lines < num_scroll) {
1280 int rbe_lines;
1281 rbe = ringbuffer_get(bot_win_rb, --i);
1282 if (!rbe)
1283 break;
1284 rbe_lines = NUM_LINES(rbe->len);
1285 lines += rbe_lines;
1286 // fprintf(stderr, "msg: %s\n", rbe->msg);
1287 wattron(bot.win, COLOR_PAIR(rbe->color));
1288 waddstr(bot.win, "\n");
1289 waddstr(bot.win, rbe->msg);
1290 if (!i)
1291 break;
1292 i--;
1293 }
1294 wrefresh(bot.win);
1295 print_scroll_msg();
1296 return;
1297 err_out:
1298 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1299 }
1300
1301 static void com_ll_decr(void)
1302 {
1303 if (loglevel <= LL_DEBUG) {
1304 print_in_bar(COLOR_ERRMSG,
1305 "loglevel already at maximal verbosity\n");
1306 return;
1307 }
1308 loglevel--;
1309 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1310 }
1311
1312 static void com_ll_incr(void)
1313 {
1314 if (loglevel >= LL_EMERG) {
1315 print_in_bar(COLOR_ERRMSG,
1316 "loglevel already at minimal verbosity\n");
1317 return;
1318 }
1319 loglevel++;
1320 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1321 }
1322
1323 /*
1324 * reread configuration, terminate on errors
1325 */
1326 static void com_reread_conf(void)
1327 {
1328 char *cf = configfile_exists();
1329 struct gui_cmdline_parser_params params = {
1330 .override = 1,
1331 .initialize = 1,
1332 .check_required = 0,
1333 .check_ambiguity = 0,
1334 .print_errors = 0,
1335 };
1336
1337 if (!cf) {
1338 PARA_WARNING_LOG("there is no configuration to read\n");
1339 return;
1340 }
1341 PARA_INFO_LOG("rereading command line options and config file\n");
1342 gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1343 /*
1344 * Despite .print_errors is set to 0, gengetopt will print to stderr
1345 * anyway, and exit on errors. So we have to shutdown curses first.
1346 */
1347 shutdown_curses();
1348 gui_cmdline_parser_config_file(cf, &conf, &params);
1349 init_curses();
1350 PARA_NOTICE_LOG("config file reloaded\n");
1351 if (check_key_map_args() < 0)
1352 finish(EXIT_FAILURE);
1353 }
1354
1355 static void com_help(void)
1356 {
1357 int i;
1358
1359 for (i = 0; i < conf.key_map_given; ++i) {
1360 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1361 const char *handler_text = "???", *desc = NULL;
1362
1363 if (!split_key_map(tmp, &handler, &arg)) {
1364 free(tmp);
1365 return;
1366 }
1367 switch (*handler) {
1368 case 'i':
1369 handler_text = "internal";
1370 desc = command_list[find_cmd_byname(arg)].description;
1371 break;
1372 case 'x': handler_text = "external"; break;
1373 case 'd': handler_text = "display "; break;
1374 case 'p': handler_text = "para "; break;
1375 }
1376 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1377 strlen(arg) < 8? "\t" : "",
1378 desc? desc : "");
1379 free(tmp);
1380 }
1381 for (i = 0; command_list[i].handler; i++) {
1382 struct gui_command gc = command_list[i];
1383
1384 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1385 strlen(gc.name) < 8? "\t" : "",
1386 gc.description);
1387 }
1388 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1389 "for more info");
1390 }
1391
1392 static void com_shrink_top_win(void)
1393 {
1394 if (top.lines <= theme.top_lines_min) {
1395 PARA_WARNING_LOG("can not decrease top window\n");
1396 return;
1397 }
1398 init_wins(top.lines - 1);
1399 wclear(top.win);
1400 print_all_items();
1401 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1402 }
1403
1404 static void com_enlarge_top_win(void)
1405 {
1406 if (bot.lines < 3) {
1407 PARA_WARNING_LOG("can not increase top window\n");
1408 return;
1409 }
1410 init_wins(top.lines + 1);
1411 wclear(top.win);
1412 print_all_items();
1413 print_in_bar(COLOR_MSG, "increased top window");
1414 }
1415
1416 static void com_version(void)
1417 {
1418 print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1419 }
1420
1421 __noreturn static void com_quit(void)
1422 {
1423 finish(0);
1424 }
1425
1426 static void com_refresh(void)
1427 {
1428 shutdown_curses();
1429 init_curses();
1430 }
1431
1432 static void change_theme(int next)
1433 {
1434 if (next)
1435 next_theme(&theme);
1436 else
1437 prev_theme(&theme);
1438 /* This seems to be needed twice, why? */
1439 com_refresh();
1440 com_refresh();
1441 PARA_NOTICE_LOG("new theme: %s\n", theme.name);
1442 }
1443
1444 static void com_next_theme(void)
1445 {
1446 change_theme(1);
1447 }
1448
1449 static void com_prev_theme(void)
1450 {
1451 change_theme(0);
1452 }
1453
1454
1455 static void handle_command(int c)
1456 {
1457 int i;
1458
1459 /* first check user-defined key bindings */
1460 for (i = 0; i < conf.key_map_given; ++i) {
1461 char *tmp, *handler, *arg;
1462
1463 tmp = para_strdup(conf.key_map_arg[i]);
1464 if (!split_key_map(tmp, &handler, &arg)) {
1465 free(tmp);
1466 return;
1467 }
1468 if (strcmp(tmp, km_keyname(c))) {
1469 free(tmp);
1470 continue;
1471 }
1472 if (*handler == 'd')
1473 display_cmd(arg);
1474 else if (*handler == 'x')
1475 external_cmd(arg);
1476 else if (*handler == 'p')
1477 para_cmd(arg);
1478 else if (*handler == 'i') {
1479 int num = find_cmd_byname(arg);
1480 if (num >= 0)
1481 command_list[num].handler();
1482 }
1483 free(tmp);
1484 return;
1485 }
1486 /* not found, check internal key bindings */
1487 for (i = 0; command_list[i].handler; i++) {
1488 if (!strcmp(km_keyname(c), command_list[i].key)) {
1489 command_list[i].handler();
1490 return;
1491 }
1492 }
1493 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1494 km_keyname(c));
1495 }
1496
1497 __noreturn static void print_help_and_die(void)
1498 {
1499 struct ggo_help h = DEFINE_GGO_HELP(gui);
1500 bool d = conf.detailed_help_given;
1501
1502 ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1503 exit(0);
1504 }
1505
1506 int main(int argc, char *argv[])
1507 {
1508 int ret;
1509 char *cf;
1510
1511 _argc = argc;
1512 _argv = argv;
1513
1514 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1515 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1516 version_handle_flag("gui", conf.version_given);
1517 if (conf.help_given || conf.detailed_help_given)
1518 print_help_and_die();
1519 cf = configfile_exists();
1520 if (!cf && conf.config_file_given) {
1521 fprintf(stderr, "can not read config file %s\n",
1522 conf.config_file_arg);
1523 exit(EXIT_FAILURE);
1524 }
1525 if (cf) {
1526 struct gui_cmdline_parser_params params = {
1527 .override = 0,
1528 .initialize = 0,
1529 .check_required = 0,
1530 .check_ambiguity = 0,
1531 .print_errors = 1,
1532 };
1533 gui_cmdline_parser_config_file(cf, &conf, &params);
1534 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1535 }
1536 if (check_key_map_args() < 0) {
1537 fprintf(stderr, "invalid key map\n");
1538 exit(EXIT_FAILURE);
1539 }
1540 init_theme_or_die(conf.theme_arg, &theme);
1541 setup_signal_handling();
1542 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1543 setlocale(LC_CTYPE, "");
1544 initscr(); /* needed only once, always successful */
1545 init_curses();
1546 print_welcome();
1547 for (;;) {
1548 print_status_bar();
1549 ret = do_select(GETCH_MODE);
1550 if (!ret)
1551 continue;
1552 print_in_bar(COLOR_MSG, " ");
1553 handle_command(ret);
1554 }
1555 }