gui: Initialize command_fds to -1.
[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 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
34
35 static int signal_pipe;
36
37 static struct win_data {
38 WINDOW *win;
39 size_t begx;
40 size_t begy;
41 size_t cols;
42 size_t lines;
43 } top, bot, sb, in, sep;
44
45 #define RINGBUFFER_SIZE 512
46 struct rb_entry {
47 char *msg;
48 size_t len;
49 int color;
50 };
51 static struct ringbuffer *bot_win_rb;
52 #define NUM_LINES(len) (1 + (len) / bot.cols)
53
54 static unsigned scroll_position;
55
56 static int curses_active;
57 static pid_t cmd_pid;
58
59 static int command_fds[2] = {-1, -1};
60 static int stat_pipe = -1;
61 static struct gui_args_info conf;
62
63 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
64
65
66 #define COLOR_STATUSBAR 52
67 #define COLOR_COMMAND 53
68 #define COLOR_OUTPUT 54
69 #define COLOR_MSG 55
70 #define COLOR_ERRMSG 56
71 #define COLOR_WELCOME 57
72 #define COLOR_SEPARATOR 58
73 #define COLOR_TOP 59
74 #define COLOR_BOT 60
75
76 struct gui_command {
77 const char *key;
78 const char *name;
79 const char *description;
80 void (*handler)(void);
81 };
82
83 struct stat_item {
84 char name[MAXLINE];
85 char prefix[MAXLINE];
86 char postfix[MAXLINE];
87 unsigned y;
88 unsigned x;
89 unsigned len;
90 int fg, bg;
91 int align;
92 char content[MAXLINE];
93 };
94
95 static struct gui_theme theme;
96
97 static int _argc;
98 static char **_argv;
99
100 static void com_help(void);
101 static void com_reread_conf(void);
102 static void com_enlarge_top_win(void);
103 static void com_shrink_top_win(void);
104 static void com_version(void);
105 __noreturn static void com_quit(void);
106 static void com_refresh(void);
107 static void com_ll_incr(void);
108 static void com_ll_decr(void);
109 static void com_prev_theme(void);
110 static void com_next_theme(void);
111 static void com_scroll_up(void);
112 static void com_scroll_down(void);
113 static void com_page_up(void);
114 static void com_page_down(void);
115 static void com_cancel_scrolling(void);
116 static void com_scroll_top(void);
117
118 static struct gui_command command_list[] = {
119 {
120 .key = "?",
121 .name = "help",
122 .description = "print help",
123 .handler = com_help
124 }, {
125 .key = "+",
126 .name = "enlarge_win",
127 .description = "enlarge the top window",
128 .handler = com_enlarge_top_win
129 }, {
130 .key = "-",
131 .name = "shrink_win",
132 .description = "shrink the top window",
133 .handler = com_shrink_top_win
134 }, {
135 .key = "r",
136 .name = "reread_conf",
137 .description = "reread configuration file",
138 .handler = com_reread_conf
139 }, {
140 .key = "q",
141 .name = "quit",
142 .description = "exit para_gui",
143 .handler = com_quit
144 }, {
145 .key = "^L",
146 .name = "refresh",
147 .description = "redraw the screen",
148 .handler = com_refresh
149 }, {
150 .key = ".",
151 .name = "next_theme",
152 .description = "switch to next theme",
153 .handler = com_next_theme
154 }, {
155 .key = ",",
156 .name = "prev_theme",
157 .description = "switch to previous stream",
158 .handler = com_prev_theme
159 }, {
160 .key = ">",
161 .name = "ll_incr",
162 .description = "increase loglevel (decreases verbosity)",
163 .handler = com_ll_incr
164 }, {
165 .key = "<",
166 .name = "ll_decr",
167 .description = "decrease loglevel (increases verbosity)",
168 .handler = com_ll_decr
169 }, {
170 .key = "V",
171 .name = "version",
172 .description = "show the para_gui version",
173 .handler = com_version
174 }, {
175 .key = "<up>",
176 .name = "scroll_up",
177 .description = "scroll up one line",
178 .handler = com_scroll_up
179 }, {
180 .key = "<down>",
181 .name = "scroll_down",
182 .description = "scroll down one line",
183 .handler = com_scroll_down
184 }, {
185 .key = "<ppage>",
186 .name = "page_up",
187 .description = "scroll up one page",
188 .handler = com_page_up
189 }, {
190 .key = "<npage>",
191 .name = "page_down",
192 .description = "scroll down one page",
193 .handler = com_page_down
194 }, {
195 .key = "<home>",
196 .name = "scroll_top",
197 .description = "scroll to top of buffer",
198 .handler = com_scroll_top
199 }, {
200 .key = "<end>",
201 .name = "cancel_scroll",
202 .description = "deactivate scroll mode",
203 .handler = com_cancel_scrolling
204 }, {
205 .handler = NULL
206 }
207 };
208
209 static int find_cmd_byname(char *name)
210 {
211 int i;
212
213 for (i = 0; command_list[i].handler; i++)
214 if (!strcmp(command_list[i].name, name))
215 return i;
216 return -1;
217 }
218
219 /* taken from mutt */
220 static char *km_keyname(int c)
221 {
222 static char buf[10];
223
224 if (c == KEY_UP) {
225 sprintf(buf, "<up>");
226 return buf;
227 }
228 if (c == KEY_DOWN) {
229 sprintf(buf, "<down>");
230 return buf;
231 }
232 if (c == KEY_LEFT) {
233 sprintf(buf, "<left>");
234 return buf;
235 }
236 if (c == KEY_RIGHT) {
237 sprintf(buf, "<right>");
238 return buf;
239 }
240 if (c == KEY_NPAGE) {
241 sprintf(buf, "<npage>");
242 return buf;
243 }
244 if (c == KEY_PPAGE) {
245 sprintf(buf, "<ppage>");
246 return buf;
247 }
248 if (c == KEY_HOME) {
249 sprintf(buf, "<home>");
250 return buf;
251 }
252 if (c == KEY_END) {
253 sprintf(buf, "<end>");
254 return buf;
255 }
256 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
257 if (c < 0)
258 c += 256;
259 if (c < 128) {
260 buf[0] = '^';
261 buf[1] = (c + '@') & 0x7f;
262 buf[2] = 0;
263 } else
264 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
265 (c >> 3) & 7, c & 7);
266 } else if (c >= KEY_F0 && c < KEY_F(256))
267 sprintf(buf, "<F%d>", c - KEY_F0);
268 else if (isprint(c))
269 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
270 else
271 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
272 return buf;
273 }
274
275 static char *configfile_exists(void)
276 {
277 static char *config_file;
278 char *tmp;
279
280 if (!conf.config_file_given) {
281 if (!config_file) {
282 char *home = para_homedir();
283 config_file = make_message("%s/.paraslash/gui.conf",
284 home);
285 free(home);
286 }
287 tmp = config_file;
288 } else
289 tmp = conf.config_file_arg;
290 return file_exists(tmp)? tmp: NULL;
291 }
292
293 /* Print given number of spaces to curses window. */
294 static void add_spaces(WINDOW* win, unsigned int num)
295 {
296 char space[] = " ";
297 unsigned sz = sizeof(space) - 1; /* number of spaces */
298
299 while (num >= sz) {
300 waddstr(win, space);
301 num -= sz;
302 }
303 if (num > 0) {
304 assert(num < sz);
305 space[num] = '\0';
306 waddstr(win, space);
307 }
308 }
309
310 /*
311 * print aligned string to curses window. This function always prints
312 * exactly len chars.
313 */
314 static int align_str(WINDOW* win, char *str, unsigned int len,
315 unsigned int align)
316 {
317 int ret, i, num; /* of spaces */
318 size_t width;
319
320 if (!win || !str)
321 return 0;
322 ret = strwidth(str, &width);
323 if (ret < 0) {
324 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
325 width = 0;
326 str[0] = '\0';
327 }
328 num = len - width;
329 if (num < 0) {
330 str[len] = '\0';
331 num = 0;
332 }
333 /* replace control characters by spaces */
334 for (i = 0; i < len && str[i]; i++) {
335 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
336 str[i] = ' ';
337 }
338 if (align == LEFT) {
339 waddstr(win, str);
340 add_spaces(win, num);
341 } else if (align == RIGHT) {
342 add_spaces(win, num);
343 waddstr(win, str);
344 } else {
345 add_spaces(win, num / 2);
346 waddstr(win, str[0]? str: "");
347 add_spaces(win, num - num / 2);
348 }
349 return 1;
350 }
351
352 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
353 {
354 char *msg;
355 va_list ap;
356
357 if (!curses_active)
358 return;
359 wattron(in.win, COLOR_PAIR(color));
360 va_start(ap, fmt);
361 xvasprintf(&msg, fmt, ap);
362 va_end(ap);
363 wmove(in.win, 0, 0);
364 align_str(in.win, msg, in.cols, LEFT);
365 free(msg);
366 wrefresh(in.win);
367 }
368
369 /*
370 * update the status bar
371 */
372 static void print_status_bar(void)
373 {
374 char *tmp;
375
376 if (!curses_active)
377 return;
378 tmp = para_strdup(STANDARD_STATUS_BAR);
379 wmove(sb.win, 0, 0);
380 align_str(sb.win, tmp, sb.cols, CENTER);
381 free(tmp);
382 wrefresh(sb.win);
383 }
384
385 /*
386 * get the number of the oldest rbe that is (partially) visible. On return,
387 * lines contains the sum of the number of lines of all visable entries. If the
388 * first one is only partially visible, lines is greater than bot.lines.
389 */
390 static int first_visible_rbe(unsigned *lines)
391 {
392 int i;
393 *lines = 0;
394 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
395 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
396 int rbe_lines;
397 if (!rbe)
398 return i - 1;
399 // fprintf(stderr, "found: %s\n", rbe->msg);
400 rbe_lines = NUM_LINES(rbe->len);
401 if (rbe_lines > bot.lines)
402 return -1;
403 *lines += rbe_lines;
404 if (*lines >= bot.lines)
405 return i;
406 }
407 return RINGBUFFER_SIZE - 1;
408 }
409
410 /*
411 returns number of first visible rbe, *lines is the number of lines drawn.
412 */
413 static int draw_top_rbe(unsigned *lines)
414 {
415 int ret, fvr = first_visible_rbe(lines);
416 struct rb_entry *rbe;
417 size_t bytes_to_skip, cells_to_skip, width;
418
419 if (fvr < 0)
420 return -1;
421 wmove(bot.win, 0, 0);
422 rbe = ringbuffer_get(bot_win_rb, fvr);
423 if (!rbe)
424 return -1;
425 if (*lines > bot.lines) {
426 /* rbe is partially visible multi-line */
427 cells_to_skip = (*lines - bot.lines) * bot.cols;
428 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
429 if (ret < 0)
430 return ret;
431 ret = strwidth(rbe->msg + bytes_to_skip, &width);
432 if (ret < 0)
433 return ret;
434 } else {
435 bytes_to_skip = 0;
436 width = rbe->len;
437 }
438 wattron(bot.win, COLOR_PAIR(rbe->color));
439 waddstr(bot.win, rbe->msg + bytes_to_skip);
440 *lines = NUM_LINES(width);
441 return fvr;
442 }
443
444 static void redraw_bot_win(void)
445 {
446 unsigned lines;
447 int i;
448
449 wmove(bot.win, 0, 0);
450 wclear(bot.win);
451 i = draw_top_rbe(&lines);
452 if (i <= 0)
453 goto out;
454 while (i > 0 && lines < bot.lines) {
455 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
456 if (!rbe) {
457 lines++;
458 waddstr(bot.win, "\n");
459 continue;
460 }
461 lines += NUM_LINES(rbe->len);
462 wattron(bot.win, COLOR_PAIR(rbe->color));
463 waddstr(bot.win, "\n");
464 waddstr(bot.win, rbe->msg);
465 }
466 out:
467 wrefresh(bot.win);
468 }
469
470 static void rb_add_entry(int color, char *msg)
471 {
472 struct rb_entry *old, *new;
473 int x, y;
474 size_t len;
475
476 if (strwidth(msg, &len) < 0)
477 return;
478 new = para_malloc(sizeof(struct rb_entry));
479 new->color = color;
480 new->len = len;
481 new->msg = msg;
482 old = ringbuffer_add(bot_win_rb, new);
483 // fprintf(stderr, "added: %s\n", new->msg);
484 if (old) {
485 free(old->msg);
486 free(old);
487 }
488 if (scroll_position) {
489 /* discard current scrolling, like xterm does */
490 scroll_position = 0;
491 redraw_bot_win();
492 return;
493 }
494 wattron(bot.win, COLOR_PAIR(color));
495 getyx(bot.win, y, x);
496 if (y || x)
497 waddstr(bot.win, "\n");
498 waddstr(bot.win, msg);
499 }
500
501 /*
502 * print formated output to bot win and refresh
503 */
504 __printf_2_3 static void outputf(int color, const char* fmt,...)
505 {
506 char *msg;
507 va_list ap;
508
509 if (!curses_active)
510 return;
511 va_start(ap, fmt);
512 xvasprintf(&msg, fmt, ap);
513 va_end(ap);
514 rb_add_entry(color, msg);
515 wrefresh(bot.win);
516 }
517
518 static int add_output_line(char *line, void *data)
519 {
520 int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
521 if (!curses_active)
522 return 1;
523 rb_add_entry(color, para_strdup(line));
524 return 1;
525 }
526
527 static int loglevel;
528
529 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
530 {
531 int color;
532 char *msg;
533 va_list ap;
534
535 if (ll < loglevel || !curses_active)
536 return;
537 switch (ll) {
538 case LL_DEBUG:
539 case LL_INFO:
540 case LL_NOTICE:
541 color = COLOR_MSG;
542 break;
543 default:
544 color = COLOR_ERRMSG;
545 }
546 va_start(ap, fmt);
547 xvasprintf(&msg, fmt, ap);
548 va_end(ap);
549 chop(msg);
550 rb_add_entry(color, msg);
551 wrefresh(bot.win);
552 }
553 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
554
555 static void setup_signal_handling(void)
556 {
557 signal_pipe = para_signal_init();
558 para_install_sighandler(SIGINT);
559 para_install_sighandler(SIGTERM);
560 para_install_sighandler(SIGCHLD);
561 para_install_sighandler(SIGWINCH);
562 para_install_sighandler(SIGUSR1);
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 %s. Theme: %s",
608 version_single_line("gui"), 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 cbo[i] = 0;
1058 if (command_fds[!i] < 0) /* both fds closed */
1059 return 0;
1060 }
1061 if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1062 PARA_NOTICE_LOG("discarding overlong line");
1063 cbo[i] = 0;
1064 flags[i] = FELF_DISCARD_FIRST;
1065 }
1066 }
1067 }
1068 ret = read_stat_pipe(&rfds);
1069 if (ret < 0) {
1070 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1071 close(stat_pipe);
1072 stat_pipe = -1;
1073 clear_all_items();
1074 free(stat_content[SI_BASENAME]);
1075 stat_content[SI_BASENAME] =
1076 para_strdup("stat command terminated!?");
1077 print_all_items();
1078 }
1079 check_return:
1080 switch (mode) {
1081 case COMMAND_MODE:
1082 ret = wgetch(top.win);
1083 if (ret != ERR && ret != KEY_RESIZE) {
1084 if (command_fds[0] >= 0) {
1085 close(command_fds[0]);
1086 command_fds[0] = -1;
1087 }
1088 if (command_fds[1] >= 0) {
1089 close(command_fds[1]);
1090 command_fds[1] = -1;
1091 }
1092 if (cmd_pid)
1093 kill(cmd_pid, SIGTERM);
1094 return -1;
1095 }
1096 break;
1097 case GETCH_MODE:
1098 ret = wgetch(top.win);
1099 if (ret != ERR && ret != KEY_RESIZE)
1100 return ret;
1101 break;
1102 case EXTERNAL_MODE:
1103 if (cmd_pid == 0)
1104 return 0;
1105 }
1106 goto repeat;
1107 }
1108
1109 /*
1110 * read from command pipe and print data to bot window
1111 */
1112 static void send_output(void)
1113 {
1114 int ret;
1115
1116 ret = mark_fd_nonblocking(command_fds[0]);
1117 if (ret < 0)
1118 goto fail;
1119 ret = mark_fd_nonblocking(command_fds[1]);
1120 if (ret < 0)
1121 goto fail;
1122 if (do_select(COMMAND_MODE) >= 0)
1123 PARA_INFO_LOG("command complete");
1124 else
1125 PARA_NOTICE_LOG("command aborted");
1126 print_in_bar(COLOR_MSG, " ");
1127 return;
1128 fail:
1129 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1130 close(command_fds[0]);
1131 close(command_fds[1]);
1132 }
1133
1134 static void para_cmd(char *cmd)
1135 {
1136 int ret, fds[3] = {0, 1, 1};
1137 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1138
1139 outputf(COLOR_COMMAND, "%s", c);
1140 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1141 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1142 free(c);
1143 if (ret < 0)
1144 return;
1145 command_fds[0] = fds[1];
1146 command_fds[1] = fds[2];
1147 send_output();
1148 }
1149
1150 /*
1151 * exec command and print output to bot win
1152 */
1153 static void display_cmd(char *cmd)
1154 {
1155 int fds[3] = {0, 1, 1};
1156
1157 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1158 outputf(COLOR_COMMAND, "%s", cmd);
1159 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1160 return;
1161 command_fds[0] = fds[1];
1162 command_fds[1] = fds[2];
1163 send_output();
1164 }
1165
1166 /*
1167 * shutdown curses and stat pipe before executing external commands
1168 */
1169 static void external_cmd(char *cmd)
1170 {
1171 int fds[3] = {-1, -1, -1};
1172
1173 if (cmd_pid)
1174 return;
1175 shutdown_curses();
1176 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1177 return;
1178 do_select(EXTERNAL_MODE);
1179 init_curses();
1180 }
1181
1182 static void print_scroll_msg(void)
1183 {
1184 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1185 int first_rbe = first_visible_rbe(&lines_total);
1186 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1187 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1188 }
1189
1190 static void com_scroll_top(void)
1191 {
1192 int i = RINGBUFFER_SIZE - 1;
1193 unsigned lines = 0;
1194
1195 while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1196 i--;
1197 /* i is oldest entry */
1198 for (; lines < bot.lines && i >= 0; i--) {
1199 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1200 if (!rbe)
1201 break;
1202 lines += NUM_LINES(rbe->len);
1203 }
1204 i++;
1205 if (lines > 0 && scroll_position != i) {
1206 scroll_position = i;
1207 redraw_bot_win();
1208 print_scroll_msg();
1209 return;
1210 }
1211 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1212 }
1213
1214 static void com_cancel_scrolling(void)
1215 {
1216
1217 if (scroll_position == 0) {
1218 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1219 return;
1220 }
1221 scroll_position = 0;
1222 redraw_bot_win();
1223 }
1224
1225 static void com_page_down(void)
1226 {
1227 unsigned lines = 0;
1228 int i = scroll_position;
1229 while (lines < bot.lines && --i > 0) {
1230 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1231 if (!rbe)
1232 break;
1233 lines += NUM_LINES(rbe->len);
1234 }
1235 if (lines) {
1236 scroll_position = i;
1237 redraw_bot_win();
1238 print_scroll_msg();
1239 return;
1240 }
1241 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1242 }
1243
1244 static void com_page_up(void)
1245 {
1246 unsigned lines;
1247 int fvr = first_visible_rbe(&lines);
1248
1249 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1250 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1251 return;
1252 }
1253 scroll_position = fvr + 1;
1254 for (; scroll_position > 0; scroll_position--) {
1255 first_visible_rbe(&lines);
1256 if (lines == bot.lines)
1257 break;
1258 }
1259 redraw_bot_win();
1260 print_scroll_msg();
1261 }
1262
1263 static void com_scroll_down(void)
1264 {
1265 struct rb_entry *rbe;
1266 int rbe_lines;
1267
1268 if (!scroll_position) {
1269 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1270 return;
1271 }
1272 scroll_position--;
1273 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1274 rbe_lines = NUM_LINES(rbe->len);
1275 wscrl(bot.win, rbe_lines);
1276 wmove(bot.win, bot.lines - rbe_lines, 0);
1277 wattron(bot.win, COLOR_PAIR(rbe->color));
1278 waddstr(bot.win, rbe->msg);
1279 wrefresh(bot.win);
1280 print_scroll_msg();
1281 }
1282
1283 static void com_scroll_up(void)
1284 {
1285 struct rb_entry *rbe = NULL;
1286 unsigned lines;
1287 int i, first_rbe, num_scroll;
1288
1289 /* the entry that is going to vanish */
1290 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1291 if (!rbe)
1292 goto err_out;
1293 num_scroll = NUM_LINES(rbe->len);
1294 first_rbe = first_visible_rbe(&lines);
1295 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1296 goto err_out;
1297 scroll_position++;
1298 wscrl(bot.win, -num_scroll);
1299 i = draw_top_rbe(&lines);
1300 if (i < 0)
1301 goto err_out;
1302 while (i > 0 && lines < num_scroll) {
1303 int rbe_lines;
1304 rbe = ringbuffer_get(bot_win_rb, --i);
1305 if (!rbe)
1306 break;
1307 rbe_lines = NUM_LINES(rbe->len);
1308 lines += rbe_lines;
1309 // fprintf(stderr, "msg: %s\n", rbe->msg);
1310 wattron(bot.win, COLOR_PAIR(rbe->color));
1311 waddstr(bot.win, "\n");
1312 waddstr(bot.win, rbe->msg);
1313 if (!i)
1314 break;
1315 i--;
1316 }
1317 wrefresh(bot.win);
1318 print_scroll_msg();
1319 return;
1320 err_out:
1321 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1322 }
1323
1324 static void com_ll_decr(void)
1325 {
1326 if (loglevel <= LL_DEBUG) {
1327 print_in_bar(COLOR_ERRMSG,
1328 "loglevel already at maximal verbosity\n");
1329 return;
1330 }
1331 loglevel--;
1332 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1333 }
1334
1335 static void com_ll_incr(void)
1336 {
1337 if (loglevel >= LL_EMERG) {
1338 print_in_bar(COLOR_ERRMSG,
1339 "loglevel already at minimal verbosity\n");
1340 return;
1341 }
1342 loglevel++;
1343 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1344 }
1345
1346 /*
1347 * reread configuration, terminate on errors
1348 */
1349 static void com_reread_conf(void)
1350 {
1351 char *cf =configfile_exists();
1352 struct gui_cmdline_parser_params params = {
1353 .override = 1,
1354 .initialize = 1,
1355 .check_required = 0,
1356 .check_ambiguity = 0,
1357 .print_errors = 0,
1358 };
1359
1360 if (!cf) {
1361 PARA_WARNING_LOG("there is no configuration to read");
1362 return;
1363 }
1364 PARA_INFO_LOG("rereading command line options and config file");
1365 gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1366 /*
1367 * Despite .print_errors is set to 0, gengetopt will print to stderr
1368 * anyway, and exit on errors. So we have to shutdown curses first.
1369 */
1370 shutdown_curses();
1371 gui_cmdline_parser_config_file(cf, &conf, &params);
1372 init_curses();
1373 PARA_NOTICE_LOG("config file reloaded");
1374 if (check_key_map_args() < 0)
1375 finish(EXIT_FAILURE);
1376 }
1377
1378 static void com_help(void)
1379 {
1380 int i;
1381
1382 for (i = 0; i < conf.key_map_given; ++i) {
1383 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1384 const char *handler_text = "???", *desc = NULL;
1385
1386 if (!split_key_map(tmp, &handler, &arg)) {
1387 free(tmp);
1388 return;
1389 }
1390 switch (*handler) {
1391 case 'i':
1392 handler_text = "internal";
1393 desc = command_list[find_cmd_byname(arg)].description;
1394 break;
1395 case 'x': handler_text = "external"; break;
1396 case 'd': handler_text = "display "; break;
1397 case 'p': handler_text = "para "; break;
1398 }
1399 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1400 strlen(arg) < 8? "\t" : "",
1401 desc? desc : "");
1402 free(tmp);
1403 }
1404 for (i = 0; command_list[i].handler; i++) {
1405 struct gui_command gc = command_list[i];
1406
1407 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1408 strlen(gc.name) < 8? "\t" : "",
1409 gc.description);
1410 }
1411 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1412 "for more info");
1413 }
1414
1415 static void com_shrink_top_win(void)
1416 {
1417 if (top.lines <= theme.top_lines_min) {
1418 PARA_WARNING_LOG("can not decrease top window");
1419 return;
1420 }
1421 init_wins(top.lines - 1);
1422 wclear(top.win);
1423 print_all_items();
1424 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1425 }
1426
1427 static void com_enlarge_top_win(void)
1428 {
1429 if (bot.lines < 3) {
1430 PARA_WARNING_LOG("can not increase top window");
1431 return;
1432 }
1433 init_wins(top.lines + 1);
1434 wclear(top.win);
1435 print_all_items();
1436 print_in_bar(COLOR_MSG, "increased top window");
1437 }
1438
1439 static void com_version(void)
1440 {
1441 print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1442 }
1443
1444 __noreturn static void com_quit(void)
1445 {
1446 finish(0);
1447 }
1448
1449 static void com_refresh(void)
1450 {
1451 shutdown_curses();
1452 init_curses();
1453 }
1454
1455 static void change_theme(int next)
1456 {
1457 if (next)
1458 next_theme(&theme);
1459 else
1460 prev_theme(&theme);
1461 /* This seems to be needed twice, why? */
1462 com_refresh();
1463 com_refresh();
1464 PARA_NOTICE_LOG("new theme: %s", theme.name);
1465 }
1466
1467 static void com_next_theme(void)
1468 {
1469 change_theme(1);
1470 }
1471
1472 static void com_prev_theme(void)
1473 {
1474 change_theme(0);
1475 }
1476
1477
1478 static void handle_command(int c)
1479 {
1480 int i;
1481
1482 /* first check user's key bindings */
1483 for (i = 0; i < conf.key_map_given; ++i) {
1484 char *tmp, *handler, *arg;
1485
1486 tmp = para_strdup(conf.key_map_arg[i]);
1487 if (!split_key_map(tmp, &handler, &arg)) {
1488 free(tmp);
1489 return;
1490 }
1491 if (strcmp(tmp, km_keyname(c))) {
1492 free(tmp);
1493 continue;
1494 }
1495 if (*handler == 'd')
1496 display_cmd(arg);
1497 else if (*handler == 'x')
1498 external_cmd(arg);
1499 else if (*handler == 'p')
1500 para_cmd(arg);
1501 else if (*handler == 'i') {
1502 int num = find_cmd_byname(arg);
1503 if (num >= 0)
1504 command_list[num].handler();
1505 }
1506 free(tmp);
1507 return;
1508 }
1509 /* not found, check internal key bindings */
1510 for (i = 0; command_list[i].handler; i++) {
1511 if (!strcmp(km_keyname(c), command_list[i].key)) {
1512 command_list[i].handler();
1513 return;
1514 }
1515 }
1516 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1517 km_keyname(c));
1518 }
1519
1520 __noreturn static void print_help_and_die(void)
1521 {
1522 struct ggo_help h = DEFINE_GGO_HELP(gui);
1523 bool d = conf.detailed_help_given;
1524
1525 ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1526 exit(0);
1527 }
1528
1529 int main(int argc, char *argv[])
1530 {
1531 int ret;
1532 char *cf;
1533
1534 _argc = argc;
1535 _argv = argv;
1536
1537 gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1538 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1539 version_handle_flag("gui", conf.version_given);
1540 if (conf.help_given || conf.detailed_help_given)
1541 print_help_and_die();
1542 cf = configfile_exists();
1543 if (!cf && conf.config_file_given) {
1544 fprintf(stderr, "can not read config file %s\n",
1545 conf.config_file_arg);
1546 exit(EXIT_FAILURE);
1547 }
1548 if (cf) {
1549 struct gui_cmdline_parser_params params = {
1550 .override = 0,
1551 .initialize = 0,
1552 .check_required = 0,
1553 .check_ambiguity = 0,
1554 .print_errors = 1,
1555 };
1556 gui_cmdline_parser_config_file(cf, &conf, &params);
1557 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1558 }
1559 if (check_key_map_args() < 0) {
1560 fprintf(stderr, "invalid key map\n");
1561 exit(EXIT_FAILURE);
1562 }
1563 init_theme_or_die(conf.theme_arg, &theme);
1564 top.lines = theme.top_lines_default;
1565 setup_signal_handling();
1566 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1567 setlocale(LC_CTYPE, "");
1568 initscr(); /* needed only once, always successful */
1569 init_curses();
1570 print_welcome();
1571 for (;;) {
1572 print_status_bar();
1573 ret = do_select(GETCH_MODE);
1574 if (!ret)
1575 continue;
1576 print_in_bar(COLOR_MSG, " ");
1577 handle_command(ret);
1578 }
1579 }