Merge branch 't/interactive'
[paraslash.git] / gui.c
1 /*
2 * Copyright (C) 1998-2013 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 "version.h"
27
28 /** define the array of error lists needed by para_gui */
29 INIT_GUI_ERRLISTS;
30 static char *stat_content[NUM_STAT_ITEMS];
31
32 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
33
34 static int signal_pipe;
35
36 static struct win_data {
37 WINDOW *win;
38 size_t begx;
39 size_t begy;
40 size_t cols;
41 size_t lines;
42 } top, bot, sb, in, sep;
43
44 #define RINGBUFFER_SIZE 512
45 struct rb_entry {
46 char *msg;
47 size_t len;
48 int color;
49 };
50 static struct ringbuffer *bot_win_rb;
51 #define NUM_LINES(len) (1 + (len) / bot.cols)
52
53 static unsigned scroll_position;
54
55 static int curses_active;
56 static pid_t cmd_pid;
57
58 static int command_fds[2];
59 static int stat_pipe = -1;
60 static struct gui_args_info conf;
61
62 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
63
64
65 #define COLOR_STATUSBAR 52
66 #define COLOR_COMMAND 53
67 #define COLOR_OUTPUT 54
68 #define COLOR_MSG 55
69 #define COLOR_ERRMSG 56
70 #define COLOR_WELCOME 57
71 #define COLOR_SEPARATOR 58
72 #define COLOR_TOP 59
73 #define COLOR_BOT 60
74
75 struct gui_command {
76 const char *key;
77 const char *name;
78 const char *description;
79 void (*handler)(void);
80 };
81
82 struct stat_item {
83 char name[MAXLINE];
84 char prefix[MAXLINE];
85 char postfix[MAXLINE];
86 unsigned y;
87 unsigned x;
88 unsigned len;
89 int fg, bg;
90 int align;
91 char content[MAXLINE];
92 };
93
94 static struct gui_theme theme;
95
96 static int _argc;
97 static char **_argv;
98
99 static void com_help(void);
100 static void com_reread_conf(void);
101 static void com_enlarge_top_win(void);
102 static void com_shrink_top_win(void);
103 static void com_version(void);
104 __noreturn static void com_quit(void);
105 static void com_refresh(void);
106 static void com_ll_incr(void);
107 static void com_ll_decr(void);
108 static void com_prev_theme(void);
109 static void com_next_theme(void);
110 static void com_scroll_up(void);
111 static void com_scroll_down(void);
112 static void com_page_up(void);
113 static void com_page_down(void);
114 static void com_cancel_scrolling(void);
115 static void com_scroll_top(void);
116
117 static struct gui_command command_list[] = {
118 {
119 .key = "?",
120 .name = "help",
121 .description = "print help",
122 .handler = com_help
123 }, {
124 .key = "+",
125 .name = "enlarge_win",
126 .description = "enlarge the top window",
127 .handler = com_enlarge_top_win
128 }, {
129 .key = "-",
130 .name = "shrink_win",
131 .description = "shrink the top window",
132 .handler = com_shrink_top_win
133 }, {
134 .key = "r",
135 .name = "reread_conf",
136 .description = "reread configuration file",
137 .handler = com_reread_conf
138 }, {
139 .key = "q",
140 .name = "quit",
141 .description = "exit para_gui",
142 .handler = com_quit
143 }, {
144 .key = "^L",
145 .name = "refresh",
146 .description = "redraw the screen",
147 .handler = com_refresh
148 }, {
149 .key = ".",
150 .name = "next_theme",
151 .description = "switch to next theme",
152 .handler = com_next_theme
153 }, {
154 .key = ",",
155 .name = "prev_theme",
156 .description = "switch to previous stream",
157 .handler = com_prev_theme
158 }, {
159 .key = ">",
160 .name = "ll_incr",
161 .description = "increase loglevel (decreases verbosity)",
162 .handler = com_ll_incr
163 }, {
164 .key = "<",
165 .name = "ll_decr",
166 .description = "decrease loglevel (increases verbosity)",
167 .handler = com_ll_decr
168 }, {
169 .key = "V",
170 .name = "version",
171 .description = "show the para_gui version",
172 .handler = com_version
173 }, {
174 .key = "<up>",
175 .name = "scroll_up",
176 .description = "scroll up one line",
177 .handler = com_scroll_up
178 }, {
179 .key = "<down>",
180 .name = "scroll_down",
181 .description = "scroll down one line",
182 .handler = com_scroll_down
183 }, {
184 .key = "<ppage>",
185 .name = "page_up",
186 .description = "scroll up one page",
187 .handler = com_page_up
188 }, {
189 .key = "<npage>",
190 .name = "page_down",
191 .description = "scroll down one page",
192 .handler = com_page_down
193 }, {
194 .key = "<home>",
195 .name = "scroll_top",
196 .description = "scroll to top of buffer",
197 .handler = com_scroll_top
198 }, {
199 .key = "<end>",
200 .name = "cancel_scroll",
201 .description = "deactivate scroll mode",
202 .handler = com_cancel_scrolling
203 }, {
204 .handler = NULL
205 }
206 };
207
208 static int find_cmd_byname(char *name)
209 {
210 int i;
211
212 for (i = 0; command_list[i].handler; i++)
213 if (!strcmp(command_list[i].name, name))
214 return i;
215 return -1;
216 }
217
218 /* taken from mutt */
219 static char *km_keyname(int c)
220 {
221 static char buf[10];
222
223 if (c == KEY_UP) {
224 sprintf(buf, "<up>");
225 return buf;
226 }
227 if (c == KEY_DOWN) {
228 sprintf(buf, "<down>");
229 return buf;
230 }
231 if (c == KEY_LEFT) {
232 sprintf(buf, "<left>");
233 return buf;
234 }
235 if (c == KEY_RIGHT) {
236 sprintf(buf, "<right>");
237 return buf;
238 }
239 if (c == KEY_NPAGE) {
240 sprintf(buf, "<npage>");
241 return buf;
242 }
243 if (c == KEY_PPAGE) {
244 sprintf(buf, "<ppage>");
245 return buf;
246 }
247 if (c == KEY_HOME) {
248 sprintf(buf, "<home>");
249 return buf;
250 }
251 if (c == KEY_END) {
252 sprintf(buf, "<end>");
253 return buf;
254 }
255 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
256 if (c < 0)
257 c += 256;
258 if (c < 128) {
259 buf[0] = '^';
260 buf[1] = (c + '@') & 0x7f;
261 buf[2] = 0;
262 } else
263 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
264 (c >> 3) & 7, c & 7);
265 } else if (c >= KEY_F0 && c < KEY_F(256))
266 sprintf(buf, "<F%d>", c - KEY_F0);
267 else if (isprint(c))
268 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
269 else
270 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
271 return buf;
272 }
273
274 static char *configfile_exists(void)
275 {
276 static char *config_file;
277 char *tmp;
278
279 if (!conf.config_file_given) {
280 if (!config_file) {
281 char *home = para_homedir();
282 config_file = make_message("%s/.paraslash/gui.conf",
283 home);
284 free(home);
285 }
286 tmp = config_file;
287 } else
288 tmp = conf.config_file_arg;
289 return file_exists(tmp)? tmp: NULL;
290 }
291
292 /* Print given number of spaces to curses window. */
293 static void add_spaces(WINDOW* win, unsigned int num)
294 {
295 char space[] = " ";
296 unsigned sz = sizeof(space) - 1; /* number of spaces */
297
298 while (num >= sz) {
299 waddstr(win, space);
300 num -= sz;
301 }
302 if (num > 0) {
303 assert(num < sz);
304 space[num] = '\0';
305 waddstr(win, space);
306 }
307 }
308
309 /*
310 * print aligned string to curses window. This function always prints
311 * exactly len chars.
312 */
313 static int align_str(WINDOW* win, char *str, unsigned int len,
314 unsigned int align)
315 {
316 int ret, i, num; /* of spaces */
317 size_t width;
318
319 if (!win || !str)
320 return 0;
321 ret = strwidth(str, &width);
322 if (ret < 0) {
323 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
324 width = 0;
325 str[0] = '\0';
326 }
327 num = len - width;
328 if (num < 0) {
329 str[len] = '\0';
330 num = 0;
331 }
332 /* replace control characters by spaces */
333 for (i = 0; i < len && str[i]; i++) {
334 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
335 str[i] = ' ';
336 }
337 if (align == LEFT) {
338 waddstr(win, str);
339 add_spaces(win, num);
340 } else if (align == RIGHT) {
341 add_spaces(win, num);
342 waddstr(win, str);
343 } else {
344 add_spaces(win, num / 2);
345 waddstr(win, str[0]? str: "");
346 add_spaces(win, num - num / 2);
347 }
348 return 1;
349 }
350
351 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
352 {
353 char *msg;
354 va_list ap;
355
356 if (!curses_active)
357 return;
358 wattron(in.win, COLOR_PAIR(color));
359 va_start(ap, fmt);
360 xvasprintf(&msg, fmt, ap);
361 va_end(ap);
362 wmove(in.win, 0, 0);
363 align_str(in.win, msg, sb.cols, LEFT);
364 free(msg);
365 wrefresh(in.win);
366 }
367
368 /*
369 * update the status bar
370 */
371 static void print_status_bar(void)
372 {
373 char *tmp;
374
375 if (!curses_active)
376 return;
377 tmp = para_strdup(STANDARD_STATUS_BAR);
378 wmove(sb.win, 0, 0);
379 align_str(sb.win, tmp, sb.cols, CENTER);
380 free(tmp);
381 wrefresh(sb.win);
382 }
383
384 /*
385 * get the number of the oldest rbe that is (partially) visible. On return,
386 * lines contains the sum of the number of lines of all visable entries. If the
387 * first one is only partially visible, lines is greater than bot.lines.
388 */
389 static int first_visible_rbe(unsigned *lines)
390 {
391 int i;
392 *lines = 0;
393 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
394 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
395 int rbe_lines;
396 if (!rbe)
397 return i - 1;
398 // fprintf(stderr, "found: %s\n", rbe->msg);
399 rbe_lines = NUM_LINES(rbe->len);
400 if (rbe_lines > bot.lines)
401 return -1;
402 *lines += rbe_lines;
403 if (*lines >= bot.lines)
404 return i;
405 }
406 return RINGBUFFER_SIZE - 1;
407 }
408
409 /*
410 returns number of first visible rbe, *lines is the number of lines drawn.
411 */
412 static int draw_top_rbe(unsigned *lines)
413 {
414 int ret, fvr = first_visible_rbe(lines);
415 struct rb_entry *rbe;
416 size_t bytes_to_skip, cells_to_skip, width;
417
418 if (fvr < 0)
419 return -1;
420 wmove(bot.win, 0, 0);
421 rbe = ringbuffer_get(bot_win_rb, fvr);
422 if (!rbe)
423 return -1;
424 if (*lines > bot.lines) {
425 /* rbe is partially visible multi-line */
426 cells_to_skip = (*lines - bot.lines) * bot.cols;
427 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
428 if (ret < 0)
429 return ret;
430 ret = strwidth(rbe->msg + bytes_to_skip, &width);
431 if (ret < 0)
432 return ret;
433 } else {
434 bytes_to_skip = 0;
435 width = rbe->len;
436 }
437 wattron(bot.win, COLOR_PAIR(rbe->color));
438 waddstr(bot.win, rbe->msg + bytes_to_skip);
439 *lines = NUM_LINES(width);
440 return fvr;
441 }
442
443 static void redraw_bot_win(void)
444 {
445 unsigned lines;
446 int i;
447
448 wmove(bot.win, 0, 0);
449 wclear(bot.win);
450 i = draw_top_rbe(&lines);
451 if (i <= 0)
452 goto out;
453 while (i > 0 && lines < bot.lines) {
454 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
455 if (!rbe) {
456 lines++;
457 waddstr(bot.win, "\n");
458 continue;
459 }
460 lines += NUM_LINES(rbe->len);
461 wattron(bot.win, COLOR_PAIR(rbe->color));
462 waddstr(bot.win, "\n");
463 waddstr(bot.win, rbe->msg);
464 }
465 out:
466 wrefresh(bot.win);
467 }
468
469 static void rb_add_entry(int color, char *msg)
470 {
471 struct rb_entry *old, *new;
472 int x, y;
473 size_t len;
474
475 if (strwidth(msg, &len) < 0)
476 return;
477 new = para_malloc(sizeof(struct rb_entry));
478 new->color = color;
479 new->len = len;
480 new->msg = msg;
481 old = ringbuffer_add(bot_win_rb, new);
482 // fprintf(stderr, "added: %s\n", new->msg);
483 if (old) {
484 free(old->msg);
485 free(old);
486 }
487 if (scroll_position) {
488 /* discard current scrolling, like xterm does */
489 scroll_position = 0;
490 redraw_bot_win();
491 return;
492 }
493 wattron(bot.win, COLOR_PAIR(color));
494 getyx(bot.win, y, x);
495 if (y || x)
496 waddstr(bot.win, "\n");
497 waddstr(bot.win, msg);
498 }
499
500 /*
501 * print formated output to bot win and refresh
502 */
503 __printf_2_3 static void outputf(int color, const char* fmt,...)
504 {
505 char *msg;
506 va_list ap;
507
508 if (!curses_active)
509 return;
510 va_start(ap, fmt);
511 xvasprintf(&msg, fmt, ap);
512 va_end(ap);
513 rb_add_entry(color, msg);
514 wrefresh(bot.win);
515 }
516
517 static int add_output_line(char *line, void *data)
518 {
519 int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
520 if (!curses_active)
521 return 1;
522 rb_add_entry(color, para_strdup(line));
523 return 1;
524 }
525
526 static int loglevel;
527
528 __printf_2_3 void curses_log(int ll, const char *fmt,...)
529 {
530 int color;
531 char *msg;
532 va_list ap;
533
534 if (ll < loglevel || !curses_active)
535 return;
536 switch (ll) {
537 case LL_DEBUG:
538 case LL_INFO:
539 case LL_NOTICE:
540 color = COLOR_MSG;
541 break;
542 default:
543 color = COLOR_ERRMSG;
544 }
545 va_start(ap, fmt);
546 xvasprintf(&msg, fmt, ap);
547 va_end(ap);
548 chop(msg);
549 rb_add_entry(color, msg);
550 wrefresh(bot.win);
551 }
552 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
553
554 static void setup_signal_handling(void)
555 {
556 signal_pipe = para_signal_init();
557 para_install_sighandler(SIGINT);
558 para_install_sighandler(SIGTERM);
559 para_install_sighandler(SIGCHLD);
560 para_install_sighandler(SIGWINCH);
561 para_install_sighandler(SIGUSR1);
562 para_sigaction(SIGHUP, SIG_IGN);
563 }
564
565 /* kill every process in the process group and exit */
566 __noreturn static void kill_pg_and_die(int ret)
567 {
568 para_sigaction(SIGTERM, SIG_IGN);
569 kill(0, SIGTERM);
570 exit(ret);
571 }
572
573 static void shutdown_curses(void)
574 {
575 if (!curses_active)
576 return;
577 def_prog_mode();
578 curses_active = 0;
579 endwin();
580 }
581
582 __noreturn static void finish(int ret)
583 {
584 shutdown_curses();
585 kill_pg_and_die(ret);
586 }
587
588 /*
589 * exit curses and print given message to stdout/stderr
590 */
591 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
592 {
593 va_list argp;
594 FILE *outfd = ret? stderr: stdout;
595
596 shutdown_curses();
597 va_start(argp, fmt);
598 vfprintf(outfd, fmt, argp);
599 va_end(argp);
600 kill_pg_and_die(ret);
601 }
602
603 static void print_welcome(void)
604 {
605 if (loglevel > LL_NOTICE)
606 return;
607 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
608 " \"" CODENAME "\". Theme: %s", theme.name);
609 wclrtoeol(bot.win);
610 }
611
612 /*
613 * init all windows
614 */
615 static void init_wins(int top_lines)
616 {
617 int i;
618
619 top.lines = top_lines;
620 top.cols = COLS;
621 top.begy = 0;
622 top.begx = 0;
623
624 bot.lines = LINES - top.lines - 3;
625 bot.cols = COLS;
626 bot.begy = top.lines + 1;
627 bot.begx = 0;
628
629 sb.lines = 1;
630 sb.cols = COLS;
631 sb.begy = LINES - 2;
632 sb.begx = 0;
633
634 in.lines = 1;
635 in.cols = COLS;
636 in.begy = LINES - 1;
637 in.begx = 0;
638
639 sep.lines = 1;
640 sep.cols = COLS;
641 sep.begy = top.lines;
642 sep.begx = 0;
643
644 assume_default_colors(theme.default_fg, theme.default_bg);
645 if (top.win) {
646 mvwin(top.win, top.begy, top.begx);
647 wresize(top.win, top.lines, top.cols);
648
649 mvwin(sb.win, sb.begy, sb.begx);
650 wresize(sb.win, sb.lines, sb.cols);
651
652 mvwin(sep.win, sep.begy, sep.begx);
653 wresize(sep.win, sep.lines, sep.cols);
654
655 mvwin(bot.win, bot.begy, bot.begx);
656 wresize(bot.win, bot.lines, bot.cols);
657
658 mvwin(in.win, in.begy, in.begx);
659 wresize(in.win, in.lines, in.cols);
660 } else {
661 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
662 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
663 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
664 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
665 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
666 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
667 msg_n_exit(1, "Error: Cannot create curses windows\n");
668 wclear(bot.win);
669 wclear(sb.win);
670 wclear(in.win);
671 scrollok(bot.win, 1);
672 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
673 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
674 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
675 wattron(top.win, COLOR_PAIR(COLOR_TOP));
676 nodelay(top.win, 1);
677 nodelay(bot.win, 1);
678 nodelay(sb.win, 1);
679 nodelay(in.win, 0);
680
681 keypad(top.win, 1);
682 keypad(bot.win, 1);
683 keypad(sb.win, 1);
684 keypad(in.win, 1);
685 print_status_bar();
686 }
687 wmove(sep.win, 0, 0);
688 for (i = 1; i <= COLS; i++)
689 waddstr(sep.win, theme.sep_str);
690 wclear(top.win);
691 //wclear(bot.win);
692 wnoutrefresh(top.win);
693 wnoutrefresh(bot.win);
694 //wnoutrefresh(sb.win);
695 print_status_bar();
696 wnoutrefresh(in.win);
697 wnoutrefresh(sep.win);
698 doupdate();
699 }
700
701 /*
702 * Print stat item #i to curses window
703 */
704 static void print_stat_item(int i)
705 {
706 char *tmp;
707 struct stat_item_data d = theme.data[i];
708 char *c = stat_content[i];
709
710 if (!curses_active || !d.len || !c)
711 return;
712 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
713 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
714 wrefresh(top.win);
715 wattron(top.win, COLOR_PAIR(i + 1));
716 align_str(top.win, tmp, d.len * COLS / 100, d.align);
717 free(tmp);
718 wrefresh(top.win);
719 }
720
721 static int update_item(int item_num, char *buf)
722 {
723 char **c = stat_content + item_num;
724
725 free(*c);
726 if (buf && buf[0])
727 goto dup;
728 switch (item_num) {
729 case SI_ARTIST:
730 *c = para_strdup("(artist tag not set)");
731 goto print;
732 case SI_TITLE:
733 *c = para_strdup("(title tag not set)");
734 goto print;
735 case SI_YEAR:
736 *c = para_strdup("????");
737 goto print;
738 case SI_ALBUM:
739 *c = para_strdup("(album tag not set)");
740 goto print;
741 case SI_COMMENT:
742 *c = para_strdup("(comment tag not set)");
743 goto print;
744 }
745 dup:
746 *c = para_strdup(buf);
747 print:
748 print_stat_item(item_num);
749 return 1;
750 }
751
752 static int read_stat_pipe(fd_set *rfds)
753 {
754 static char *buf;
755 static int bufsize, loaded;
756 int ret, ret2;
757 size_t sz;
758
759 if (stat_pipe < 0)
760 return 0;
761 if (loaded >= bufsize) {
762 if (bufsize > 1000 * 1000) {
763 loaded = 0;
764 return 0;
765 }
766 bufsize += bufsize + 1000;
767 buf = para_realloc(buf, bufsize);
768 }
769 assert(loaded < bufsize);
770 ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
771 rfds, &sz);
772 loaded += sz;
773 ret2 = for_each_stat_item(buf, loaded, update_item);
774 if (ret < 0 || ret2 < 0) {
775 loaded = 0;
776 return ret2 < 0? ret2 : ret;
777 }
778 sz = ret2; /* what is left */
779 if (sz > 0 && sz < loaded)
780 memmove(buf, buf + loaded - sz, sz);
781 loaded = sz;
782 return 1;
783 }
784
785 static void print_all_items(void)
786 {
787 int i;
788
789 if (!curses_active)
790 return;
791 FOR_EACH_STATUS_ITEM(i)
792 print_stat_item(i);
793 }
794
795 static void clear_all_items(void)
796 {
797 int i;
798
799 FOR_EACH_STATUS_ITEM(i) {
800 free(stat_content[i]);
801 stat_content[i] = para_strdup("");
802 }
803 }
804
805 static void init_pair_or_die(short pair, short f, short b)
806 {
807 if (init_pair(pair, f, b) == ERR)
808 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
809 }
810
811 static void init_colors_or_die(void)
812 {
813 int i;
814
815 if (!has_colors())
816 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
817 if (start_color() == ERR)
818 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
819 FOR_EACH_STATUS_ITEM(i)
820 if (theme.data[i].len)
821 init_pair_or_die(i + 1, theme.data[i].fg,
822 theme.data[i].bg);
823 init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
824 init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
825 init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
826 init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
827 init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
828 init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
829 init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
830 init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
831 init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
832 }
833
834 /* (Re-)initialize the curses library. */
835 static void init_curses(void)
836 {
837 curses_active = 1;
838 if (top.win && refresh() == ERR) /* refesh is really needed */
839 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
840 if (LINES < theme.lines_min || COLS < theme.cols_min)
841 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
842 " (need at least %dx%d)\n", COLS, LINES,
843 theme.cols_min, theme.lines_min);
844 curs_set(0); /* make cursor invisible, ignore errors */
845 nonl(); /* do not NL->CR/NL on output, always returns OK */
846 /* don't echo input */
847 if (noecho() == ERR)
848 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
849 /* take input chars one at a time, no wait for \n */
850 if (cbreak() == ERR)
851 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
852 init_colors_or_die();
853 clear(); /* ignore non-fatal errors */
854 init_wins(theme.top_lines_default);
855 print_all_items();
856 // noecho(); /* don't echo input */
857 }
858
859 static void check_sigchld(void)
860 {
861 int ret;
862 pid_t pid;
863 reap_next_child:
864 ret = para_reap_child(&pid);
865 if (ret <= 0)
866 return;
867 if (pid == cmd_pid)
868 cmd_pid = 0;
869 goto reap_next_child;
870 }
871
872 /*
873 * This sucker modifies its first argument. *handler and *arg are
874 * pointers to 0-terminated strings (inside line). Crap.
875 */
876 static int split_key_map(char *line, char **handler, char **arg)
877 {
878 if (!(*handler = strchr(line + 1, ':')))
879 goto err_out;
880 **handler = '\0';
881 (*handler)++;
882 if (!(*arg = strchr(*handler, ':')))
883 goto err_out;
884 **arg = '\0';
885 (*arg)++;
886 return 1;
887 err_out:
888 return 0;
889 }
890
891 static int check_key_map_args(void)
892 {
893 char *s;
894 int i, ret = -1;
895 char *tmp = NULL, *handler, *arg;
896
897 for (i = 0; i < conf.key_map_given; ++i) {
898 s = conf.key_map_arg[i];
899 if (!(*s))
900 goto err_out;
901 free(tmp);
902 tmp = para_strdup(s);
903 if (!split_key_map(tmp, &handler, &arg))
904 goto err_out;
905 if (strlen(handler) != 1)
906 goto err_out;
907 if (*handler != 'x'
908 && *handler != 'd'
909 && *handler != 'i'
910 && *handler != 'p')
911 goto err_out;
912 if (*handler != 'i')
913 continue;
914 if (find_cmd_byname(arg) < 0)
915 goto err_out;
916 }
917 ret = 0;
918 err_out:
919 free(tmp);
920 return ret;
921 }
922
923 /*
924 * React to various signal-related events
925 */
926 static void handle_signal(int sig)
927 {
928 switch (sig) {
929 case SIGTERM:
930 msg_n_exit(EXIT_FAILURE,
931 "only the good die young (caught SIGTERM))\n");
932 return;
933 case SIGWINCH:
934 if (curses_active) {
935 shutdown_curses();
936 init_curses();
937 redraw_bot_win();
938 }
939 return;
940 case SIGINT:
941 PARA_WARNING_LOG("caught SIGINT, reset");
942 /* Nothing to do. SIGINT killed our child which gets noticed
943 * by do_select and resets everything.
944 */
945 return;
946 case SIGUSR1:
947 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
948 com_reread_conf();
949 return;
950 case SIGCHLD:
951 check_sigchld();
952 return;
953 }
954 }
955
956 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
957 {
958 static struct timeval next_exec, atm, diff;
959 int ret, fds[3] = {0, 1, 0};
960 pid_t pid;
961
962 if (stat_pipe >= 0)
963 goto success;
964 /* Avoid busy loop */
965 gettimeofday(&atm, NULL);
966 if (tv_diff(&next_exec, &atm, &diff) > 0) {
967 if (tv_diff(&diff, tv, NULL) < 0)
968 *tv = diff;
969 return;
970 }
971 next_exec.tv_sec = atm.tv_sec + 2;
972 ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
973 if (ret < 0)
974 return;
975 ret = mark_fd_nonblocking(fds[1]);
976 if (ret < 0) {
977 close(fds[1]);
978 return;
979 }
980 stat_pipe = fds[1];
981 success:
982 para_fd_set(stat_pipe, rfds, max_fileno);
983 }
984
985 #define COMMAND_BUF_SIZE 32768
986
987 /*
988 * This is the core select loop. Besides the (internal) signal
989 * pipe, the following other fds are checked according to the mode:
990 *
991 * GETCH_MODE: check stdin, return when key is pressed
992 *
993 * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
994 * stdout and stderr or when any key is pressed.
995 *
996 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
997 * is running. During that time curses is disabled. Returns when
998 * cmd_pid == 0.
999 */
1000 static int do_select(int mode)
1001 {
1002 fd_set rfds;
1003 int ret, i, max_fileno;
1004 char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
1005 int cbo[2] = {0, 0}; /* command buf offsets */
1006 struct timeval tv;
1007 unsigned flags[2] = {0, 0}; /* for for_each_line() */
1008
1009 repeat:
1010 tv.tv_sec = conf.timeout_arg / 1000;
1011 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
1012 // ret = refresh_status();
1013 FD_ZERO(&rfds);
1014 max_fileno = 0;
1015 status_pre_select(&rfds, &max_fileno, &tv);
1016 /* signal pipe */
1017 para_fd_set(signal_pipe, &rfds, &max_fileno);
1018 /* command pipe only for COMMAND_MODE */
1019 if (mode == COMMAND_MODE) {
1020 if (command_fds[0] >= 0)
1021 para_fd_set(command_fds[0], &rfds, &max_fileno);
1022 if (command_fds[1] >= 0)
1023 para_fd_set(command_fds[1], &rfds, &max_fileno);
1024 }
1025 if (mode == GETCH_MODE || mode == COMMAND_MODE)
1026 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
1027 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1028 if (ret <= 0)
1029 goto check_return; /* skip fd checks */
1030 /* signals */
1031 ret = para_next_signal(&rfds);
1032 if (ret > 0)
1033 handle_signal(ret);
1034 /* read command pipe if ready */
1035 if (mode == COMMAND_MODE) {
1036 for (i = 0; i < 2; i++) {
1037 size_t sz;
1038 if (command_fds[i] < 0)
1039 continue;
1040 ret = read_nonblock(command_fds[i],
1041 command_buf[i] + cbo[i],
1042 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1043 cbo[i] += sz;
1044 sz = cbo[i];
1045 cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1046 add_output_line, &i);
1047 if (sz != cbo[i]) { /* at least one line found */
1048 wrefresh(bot.win);
1049 flags[i] = 0;
1050 }
1051 if (ret < 0) {
1052 PARA_NOTICE_LOG("closing command fd %d: %s",
1053 i, para_strerror(-ret));
1054 close(command_fds[i]);
1055 command_fds[i] = -1;
1056 flags[i] = 0;
1057 if (command_fds[!i] < 0) /* both fds closed */
1058 return 0;
1059 }
1060 if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1061 PARA_NOTICE_LOG("discarding overlong line");
1062 cbo[i] = 0;
1063 flags[i] = FELF_DISCARD_FIRST;
1064 }
1065 }
1066 }
1067 ret = read_stat_pipe(&rfds);
1068 if (ret < 0) {
1069 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1070 close(stat_pipe);
1071 stat_pipe = -1;
1072 clear_all_items();
1073 free(stat_content[SI_BASENAME]);
1074 stat_content[SI_BASENAME] =
1075 para_strdup("stat command terminated!?");
1076 print_all_items();
1077 }
1078 check_return:
1079 switch (mode) {
1080 case COMMAND_MODE:
1081 ret = wgetch(top.win);
1082 if (ret != ERR && ret != KEY_RESIZE) {
1083 if (command_fds[0] >= 0) {
1084 close(command_fds[0]);
1085 command_fds[0] = -1;
1086 }
1087 if (command_fds[1] >= 0) {
1088 close(command_fds[1]);
1089 command_fds[1] = -1;
1090 }
1091 if (cmd_pid)
1092 kill(cmd_pid, SIGTERM);
1093 return -1;
1094 }
1095 break;
1096 case GETCH_MODE:
1097 ret = wgetch(top.win);
1098 if (ret != ERR && ret != KEY_RESIZE)
1099 return ret;
1100 break;
1101 case EXTERNAL_MODE:
1102 if (cmd_pid == 0)
1103 return 0;
1104 }
1105 goto repeat;
1106 }
1107
1108 /*
1109 * read from command pipe and print data to bot window
1110 */
1111 static void send_output(void)
1112 {
1113 int ret;
1114
1115 ret = mark_fd_nonblocking(command_fds[0]);
1116 if (ret < 0)
1117 goto fail;
1118 ret = mark_fd_nonblocking(command_fds[1]);
1119 if (ret < 0)
1120 goto fail;
1121 if (do_select(COMMAND_MODE) >= 0)
1122 PARA_INFO_LOG("command complete");
1123 else
1124 PARA_NOTICE_LOG("command aborted");
1125 print_in_bar(COLOR_MSG, " ");
1126 return;
1127 fail:
1128 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1129 close(command_fds[0]);
1130 close(command_fds[1]);
1131 }
1132
1133 static void para_cmd(char *cmd)
1134 {
1135 int ret, fds[3] = {0, 1, 1};
1136 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1137
1138 outputf(COLOR_COMMAND, "%s", c);
1139 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1140 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1141 free(c);
1142 if (ret < 0)
1143 return;
1144 command_fds[0] = fds[1];
1145 command_fds[1] = fds[2];
1146 send_output();
1147 }
1148
1149 /*
1150 * exec command and print output to bot win
1151 */
1152 static void display_cmd(char *cmd)
1153 {
1154 int fds[3] = {0, 1, 1};
1155
1156 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1157 outputf(COLOR_COMMAND, "%s", cmd);
1158 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1159 return;
1160 command_fds[0] = fds[1];
1161 command_fds[1] = fds[2];
1162 send_output();
1163 }
1164
1165 /*
1166 * shutdown curses and stat pipe before executing external commands
1167 */
1168 static void external_cmd(char *cmd)
1169 {
1170 int fds[3] = {-1, -1, -1};
1171
1172 if (cmd_pid)
1173 return;
1174 shutdown_curses();
1175 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1176 return;
1177 do_select(EXTERNAL_MODE);
1178 init_curses();
1179 }
1180
1181 static void print_scroll_msg(void)
1182 {
1183 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1184 int first_rbe = first_visible_rbe(&lines_total);
1185 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1186 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1187 }
1188
1189 static void com_scroll_top(void)
1190 {
1191 int i = RINGBUFFER_SIZE - 1;
1192 unsigned lines = 0;
1193
1194 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1195 i--;
1196 /* i is oldest entry */
1197 for (; lines < bot.lines && i >= 0; i--) {
1198 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1199 if (!rbe)
1200 break;
1201 lines += NUM_LINES(rbe->len);
1202 }
1203 i++;
1204 if (lines > 0 && scroll_position != i) {
1205 scroll_position = i;
1206 redraw_bot_win();
1207 print_scroll_msg();
1208 return;
1209 }
1210 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1211 }
1212
1213 static void com_cancel_scrolling(void)
1214 {
1215
1216 if (scroll_position == 0) {
1217 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1218 return;
1219 }
1220 scroll_position = 0;
1221 redraw_bot_win();
1222 }
1223
1224 static void com_page_down(void)
1225 {
1226 unsigned lines = 0;
1227 int i = scroll_position;
1228 while (lines < bot.lines && --i > 0) {
1229 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1230 if (!rbe)
1231 break;
1232 lines += NUM_LINES(rbe->len);
1233 }
1234 if (lines) {
1235 scroll_position = i;
1236 redraw_bot_win();
1237 print_scroll_msg();
1238 return;
1239 }
1240 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1241 }
1242
1243 static void com_page_up(void)
1244 {
1245 unsigned lines;
1246 int fvr = first_visible_rbe(&lines);
1247
1248 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1249 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1250 return;
1251 }
1252 scroll_position = fvr + 1;
1253 for (; scroll_position > 0; scroll_position--) {
1254 first_visible_rbe(&lines);
1255 if (lines == bot.lines)
1256 break;
1257 }
1258 redraw_bot_win();
1259 print_scroll_msg();
1260 }
1261
1262 static void com_scroll_down(void)
1263 {
1264 struct rb_entry *rbe;
1265 int rbe_lines;
1266
1267 if (!scroll_position) {
1268 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1269 return;
1270 }
1271 scroll_position--;
1272 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1273 rbe_lines = NUM_LINES(rbe->len);
1274 wscrl(bot.win, rbe_lines);
1275 wmove(bot.win, bot.lines - rbe_lines, 0);
1276 wattron(bot.win, COLOR_PAIR(rbe->color));
1277 waddstr(bot.win, rbe->msg);
1278 wrefresh(bot.win);
1279 print_scroll_msg();
1280 }
1281
1282 static void com_scroll_up(void)
1283 {
1284 struct rb_entry *rbe = NULL;
1285 unsigned lines;
1286 int i, first_rbe, num_scroll;
1287
1288 /* the entry that is going to vanish */
1289 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1290 if (!rbe)
1291 goto err_out;
1292 num_scroll = NUM_LINES(rbe->len);
1293 first_rbe = first_visible_rbe(&lines);
1294 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1295 goto err_out;
1296 scroll_position++;
1297 wscrl(bot.win, -num_scroll);
1298 i = draw_top_rbe(&lines);
1299 if (i < 0)
1300 goto err_out;
1301 while (i > 0 && lines < num_scroll) {
1302 int rbe_lines;
1303 rbe = ringbuffer_get(bot_win_rb, --i);
1304 if (!rbe)
1305 break;
1306 rbe_lines = NUM_LINES(rbe->len);
1307 lines += rbe_lines;
1308 // fprintf(stderr, "msg: %s\n", rbe->msg);
1309 wattron(bot.win, COLOR_PAIR(rbe->color));
1310 waddstr(bot.win, "\n");
1311 waddstr(bot.win, rbe->msg);
1312 if (!i)
1313 break;
1314 i--;
1315 }
1316 wrefresh(bot.win);
1317 print_scroll_msg();
1318 return;
1319 err_out:
1320 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1321 }
1322
1323 static void com_ll_decr(void)
1324 {
1325 if (loglevel <= LL_DEBUG) {
1326 print_in_bar(COLOR_ERRMSG,
1327 "loglevel already at maximal verbosity\n");
1328 return;
1329 }
1330 loglevel--;
1331 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1332 }
1333
1334 static void com_ll_incr(void)
1335 {
1336 if (loglevel >= LL_EMERG) {
1337 print_in_bar(COLOR_ERRMSG,
1338 "loglevel already at minimal verbosity\n");
1339 return;
1340 }
1341 loglevel++;
1342 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1343 }
1344
1345 /*
1346 * reread configuration, terminate on errors
1347 */
1348 static void com_reread_conf(void)
1349 {
1350 char *cf =configfile_exists();
1351 struct gui_cmdline_parser_params params = {
1352 .override = 1,
1353 .initialize = 1,
1354 .check_required = 0,
1355 .check_ambiguity = 0,
1356 .print_errors = 0,
1357 };
1358
1359 if (!cf) {
1360 PARA_WARNING_LOG("there is no configuration to read");
1361 return;
1362 }
1363 PARA_INFO_LOG("rereading command line options and config file");
1364 gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1365 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
1366 PARA_EMERG_LOG("errors in config file");
1367 finish(EXIT_FAILURE);
1368 }
1369 PARA_NOTICE_LOG("config file reloaded");
1370 if (check_key_map_args() < 0)
1371 finish(EXIT_FAILURE);
1372 }
1373
1374 static void com_help(void)
1375 {
1376 int i;
1377
1378 for (i = 0; i < conf.key_map_given; ++i) {
1379 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1380 const char *handler_text = "???", *desc = NULL;
1381
1382 if (!split_key_map(tmp, &handler, &arg)) {
1383 free(tmp);
1384 return;
1385 }
1386 switch (*handler) {
1387 case 'i':
1388 handler_text = "internal";
1389 desc = command_list[find_cmd_byname(arg)].description;
1390 break;
1391 case 'x': handler_text = "external"; break;
1392 case 'd': handler_text = "display "; break;
1393 case 'p': handler_text = "para "; break;
1394 }
1395 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1396 strlen(arg) < 8? "\t" : "",
1397 desc? desc : "");
1398 free(tmp);
1399 }
1400 for (i = 0; command_list[i].handler; i++) {
1401 struct gui_command gc = command_list[i];
1402
1403 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1404 strlen(gc.name) < 8? "\t" : "",
1405 gc.description);
1406 }
1407 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1408 "for more info");
1409 }
1410
1411 static void com_shrink_top_win(void)
1412 {
1413 if (top.lines <= theme.top_lines_min) {
1414 PARA_WARNING_LOG("can not decrease top window");
1415 return;
1416 }
1417 init_wins(top.lines - 1);
1418 wclear(top.win);
1419 print_all_items();
1420 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1421 }
1422
1423 static void com_enlarge_top_win(void)
1424 {
1425 if (bot.lines < 3) {
1426 PARA_WARNING_LOG("can not increase top window");
1427 return;
1428 }
1429 init_wins(top.lines + 1);
1430 wclear(top.win);
1431 print_all_items();
1432 print_in_bar(COLOR_MSG, "increased top window");
1433 }
1434
1435 static void com_version(void)
1436 {
1437 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1438 CODENAME "\"");
1439 }
1440
1441 __noreturn static void com_quit(void)
1442 {
1443 finish(0);
1444 }
1445
1446 static void com_refresh(void)
1447 {
1448 shutdown_curses();
1449 init_curses();
1450 }
1451
1452 static void change_theme(int next)
1453 {
1454 if (next)
1455 next_theme(&theme);
1456 else
1457 prev_theme(&theme);
1458 /* This seems to be needed twice, why? */
1459 com_refresh();
1460 com_refresh();
1461 PARA_NOTICE_LOG("new theme: %s", theme.name);
1462 }
1463
1464 static void com_next_theme(void)
1465 {
1466 change_theme(1);
1467 }
1468
1469 static void com_prev_theme(void)
1470 {
1471 change_theme(0);
1472 }
1473
1474
1475 static void handle_command(int c)
1476 {
1477 int i;
1478
1479 /* first check user's key bindings */
1480 for (i = 0; i < conf.key_map_given; ++i) {
1481 char *tmp, *handler, *arg;
1482
1483 tmp = para_strdup(conf.key_map_arg[i]);
1484 if (!split_key_map(tmp, &handler, &arg)) {
1485 free(tmp);
1486 return;
1487 }
1488 if (strcmp(tmp, km_keyname(c))) {
1489 free(tmp);
1490 continue;
1491 }
1492 if (*handler == 'd')
1493 display_cmd(arg);
1494 else if (*handler == 'x')
1495 external_cmd(arg);
1496 else if (*handler == 'p')
1497 para_cmd(arg);
1498 else if (*handler == 'i') {
1499 int num = find_cmd_byname(arg);
1500 if (num >= 0)
1501 command_list[num].handler();
1502 }
1503 free(tmp);
1504 return;
1505 }
1506 /* not found, check internal key bindings */
1507 for (i = 0; command_list[i].handler; i++) {
1508 if (!strcmp(km_keyname(c), command_list[i].key)) {
1509 command_list[i].handler();
1510 return;
1511 }
1512 }
1513 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1514 km_keyname(c));
1515 }
1516
1517 int main(int argc, char *argv[])
1518 {
1519 int ret;
1520 char *cf;
1521
1522 _argc = argc;
1523 _argv = argv;
1524
1525 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1526 HANDLE_VERSION_FLAG("gui", conf);
1527 cf = configfile_exists();
1528 if (!cf && conf.config_file_given) {
1529 fprintf(stderr, "can not read config file %s\n",
1530 conf.config_file_arg);
1531 exit(EXIT_FAILURE);
1532 }
1533 if (cf) {
1534 struct gui_cmdline_parser_params params = {
1535 .override = 0,
1536 .initialize = 0,
1537 .check_required = 0,
1538 .check_ambiguity = 0,
1539 .print_errors = 1,
1540 };
1541 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
1542 exit(EXIT_FAILURE);
1543 }
1544 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1545 if (check_key_map_args() < 0) {
1546 fprintf(stderr, "invalid key map\n");
1547 exit(EXIT_FAILURE);
1548 }
1549 init_theme_or_die(conf.theme_arg, &theme);
1550 top.lines = theme.top_lines_default;
1551 setup_signal_handling();
1552 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1553 setlocale(LC_CTYPE, "");
1554 initscr(); /* needed only once, always successful */
1555 init_curses();
1556 print_welcome();
1557 for (;;) {
1558 print_status_bar();
1559 ret = do_select(GETCH_MODE);
1560 if (!ret)
1561 continue;
1562 print_in_bar(COLOR_MSG, " ");
1563 handle_command(ret);
1564 }
1565 }