gui.c

   1 /*
   2  * Copyright (C) 1998-2011 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
  14 #include "gui.cmdline.h"
  15 #include "para.h"
  16 #include "gui.h"
  17 #include "string.h"
  18 #include "ringbuffer.h"
  19 #include "fd.h"
  20 #include "error.h"
  21 #include "list.h"
  22 #include "sched.h"
  23 #include "signal.h"
  24 #include "version.h"
  25
  26 /** define the array of error lists needed by para_gui */
  27 INIT_GUI_ERRLISTS;
  28 static char *stat_content[NUM_STAT_ITEMS];
  29
  30 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
  31
  32 static int signal_pipe;
  33
  34 static struct win_data {
  35         WINDOW *win;
  36         size_t begx;
  37         size_t begy;
  38         size_t cols;
  39         size_t lines;
  40 } top, bot, sb, in, sep;
  41
  42 #define RINGBUFFER_SIZE 512
  43 struct rb_entry {
  44         char *msg;
  45         size_t len;
  46         int color;
  47 };
  48 static struct ringbuffer *bot_win_rb;
  49 #define NUM_LINES(len) (1 + (len) / bot.cols)
  50
  51 static unsigned scroll_position;
  52
  53 static int cmd_died, curses_active;
  54 static pid_t cmd_pid;
  55
  56 static int command_pipe = -1;
  57 static int stat_pipe = -1;
  58 static struct gui_args_info conf;
  59
  60 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  61
  62
  63 #define COLOR_STATUSBAR 52
  64 #define COLOR_COMMAND 53
  65 #define COLOR_OUTPUT 54
  66 #define COLOR_MSG 55
  67 #define COLOR_ERRMSG 56
  68 #define COLOR_WELCOME 57
  69 #define COLOR_SEPARATOR 58
  70 #define COLOR_TOP 59
  71 #define COLOR_BOT 60
  72
  73 struct gui_command {
  74         const char *key;
  75         const char *name;
  76         const char *description;
  77         void (*handler)(void);
  78 };
  79
  80 struct stat_item {
  81         char name[MAXLINE];
  82         char prefix[MAXLINE];
  83         char postfix[MAXLINE];
  84         unsigned y;
  85         unsigned x;
  86         unsigned len;
  87         int fg, bg;
  88         int align;
  89         char content[MAXLINE];
  90 };
  91
  92 static struct gui_theme theme;
  93
  94 static int _argc;
  95 static char **_argv;
  96
  97 static void com_help(void);
  98 static void com_reread_conf(void);
  99 static void com_enlarge_top_win(void);
 100 static void com_shrink_top_win(void);
 101 static void com_version(void);
 102 __noreturn static void com_quit(void);
 103 static void com_refresh(void);
 104 static void com_ll_incr(void);
 105 static void com_ll_decr(void);
 106 static void com_prev_theme(void);
 107 static void com_next_theme(void);
 108 static void com_scroll_up(void);
 109 static void com_scroll_down(void);
 110 static void com_page_up(void);
 111 static void com_page_down(void);
 112 static void com_cancel_scrolling(void);
 113 static void com_scroll_top(void);
 114
 115 static struct gui_command command_list[] = {
 116         {
 117                 .key = "?",
 118                 .name = "help",
 119                 .description = "print help",
 120                 .handler = com_help
 121         }, {
 122                 .key = "+",
 123                 .name = "enlarge_win",
 124                 .description = "enlarge the top window",
 125                 .handler = com_enlarge_top_win
 126         }, {
 127                 .key = "-",
 128                 .name = "shrink_win",
 129                 .description = "shrink the top window",
 130                 .handler = com_shrink_top_win
 131         }, {
 132                 .key = "r",
 133                 .name = "reread_conf",
 134                 .description = "reread configuration file",
 135                 .handler = com_reread_conf
 136         }, {
 137                 .key = "q",
 138                 .name = "quit",
 139                 .description = "exit para_gui",
 140                 .handler = com_quit
 141         }, {
 142                 .key = "^L",
 143                 .name = "refresh",
 144                 .description = "redraw the screen",
 145                 .handler = com_refresh
 146         }, {
 147                 .key = ".",
 148                 .name = "next_theme",
 149                 .description = "switch to next theme",
 150                 .handler = com_next_theme
 151         }, {
 152                 .key = ",",
 153                 .name = "prev_theme",
 154                 .description = "switch to previous stream",
 155                 .handler = com_prev_theme
 156         }, {
 157                 .key = ">",
 158                 .name = "ll_incr",
 159                 .description = "increase loglevel (decreases verbosity)",
 160                 .handler = com_ll_incr
 161         }, {
 162                 .key = "<",
 163                 .name = "ll_decr",
 164                 .description = "decrease loglevel (increases verbosity)",
 165                 .handler = com_ll_decr
 166         }, {
 167                 .key = "V",
 168                 .name = "version",
 169                 .description = "show the para_gui version",
 170                 .handler = com_version
 171         }, {
 172                 .key = "<up>",
 173                 .name = "scroll_up",
 174                 .description = "scroll up one line",
 175                 .handler = com_scroll_up
 176         }, {
 177                 .key = "<down>",
 178                 .name = "scroll_down",
 179                 .description = "scroll down one line",
 180                 .handler = com_scroll_down
 181         }, {
 182                 .key = "<ppage>",
 183                 .name = "page_up",
 184                 .description = "scroll up one page",
 185                 .handler = com_page_up
 186         }, {
 187                 .key = "<npage>",
 188                 .name = "page_down",
 189                 .description = "scroll down one page",
 190                 .handler = com_page_down
 191         }, {
 192                 .key = "<home>",
 193                 .name = "scroll_top",
 194                 .description = "scroll to top of buffer",
 195                 .handler = com_scroll_top
 196         }, {
 197                 .key = "<end>",
 198                 .name = "cancel_scroll",
 199                 .description = "deactivate scroll mode",
 200                 .handler = com_cancel_scrolling
 201         }, {
 202                 .handler = NULL
 203         }
 204 };
 205
 206 static int find_cmd_byname(char *name)
 207 {
 208         int i;
 209
 210         for (i = 0; command_list[i].handler; i++)
 211                 if (!strcmp(command_list[i].name, name))
 212                         return i;
 213         return -1;
 214 }
 215
 216 /* taken from mutt */
 217 static char *km_keyname(int c)
 218 {
 219         static char buf[10];
 220
 221         if (c == KEY_UP) {
 222                 sprintf(buf, "<up>");
 223                 return buf;
 224         }
 225         if (c == KEY_DOWN) {
 226                 sprintf(buf, "<down>");
 227                 return buf;
 228         }
 229         if (c == KEY_LEFT) {
 230                 sprintf(buf, "<left>");
 231                 return buf;
 232         }
 233         if (c == KEY_RIGHT) {
 234                 sprintf(buf, "<right>");
 235                 return buf;
 236         }
 237         if (c == KEY_NPAGE) {
 238                 sprintf(buf, "<npage>");
 239                 return buf;
 240         }
 241         if (c == KEY_PPAGE) {
 242                 sprintf(buf, "<ppage>");
 243                 return buf;
 244         }
 245         if (c == KEY_HOME) {
 246                 sprintf(buf, "<home>");
 247                 return buf;
 248         }
 249         if (c == KEY_END) {
 250                 sprintf(buf, "<end>");
 251                 return buf;
 252         }
 253         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 254                 if (c < 0)
 255                         c += 256;
 256                 if (c < 128) {
 257                         buf[0] = '^';
 258                         buf[1] = (c + '@') & 0x7f;
 259                         buf[2] = 0;
 260                 } else
 261                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 262                                 (c >> 3) & 7, c & 7);
 263         } else if (c >= KEY_F0 && c < KEY_F(256))
 264                 sprintf(buf, "<F%d>", c - KEY_F0);
 265         else if (isprint(c))
 266                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 267         else
 268                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 269         return buf;
 270 }
 271
 272 static char *configfile_exists(void)
 273 {
 274         static char *config_file;
 275         char *tmp;
 276
 277         if (!conf.config_file_given) {
 278                 if (!config_file) {
 279                         char *home = para_homedir();
 280                         config_file = make_message("%s/.paraslash/gui.conf",
 281                                 home);
 282                         free(home);
 283                 }
 284                 tmp = config_file;
 285         } else
 286                 tmp = conf.config_file_arg;
 287         return file_exists(tmp)? tmp: NULL;
 288 }
 289
 290 /*
 291  * print num spaces to curses window
 292  */
 293 static void add_spaces(WINDOW* win, unsigned int num)
 294 {
 295         while (num > 0) {
 296                 num--;
 297                 waddstr(win, " ");
 298         }
 299 }
 300
 301 /*
 302  * print aligned string to curses window. This function always prints
 303  * exactly len chars.
 304  */
 305 static int align_str(WINDOW* win, char *str, unsigned int len,
 306                 unsigned int align)
 307 {
 308         int i, num; /* of spaces */
 309
 310         if (!win || !str)
 311                 return -1;
 312         num = len - strlen(str);
 313         if (num < 0) {
 314                 str[len] = '\0';
 315                 num = 0;
 316         }
 317         /* replace control characters by spaces */
 318         for (i = 0; i < len && str[i]; i++) {
 319                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 320                         str[i] = ' ';
 321         }
 322         if (align == LEFT) {
 323                 waddstr(win, str);
 324                 add_spaces(win, num);
 325         } else if (align == RIGHT) {
 326                 add_spaces(win, num);
 327                 waddstr(win, str);
 328         } else {
 329                 add_spaces(win, num / 2);
 330                 waddstr(win, str[0]? str: "");
 331                 add_spaces(win, num - num / 2);
 332         }
 333         return 1;
 334 }
 335
 336 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 337 {
 338         char *msg;
 339
 340         if (!curses_active)
 341                 return;
 342         wattron(in.win, COLOR_PAIR(color));
 343         PARA_VSPRINTF(fmt, msg);
 344         wmove(in.win, 0, 0);
 345         align_str(in.win, msg, sb.cols, LEFT);
 346         free(msg);
 347         wrefresh(in.win);
 348 }
 349
 350 /*
 351  * update the status bar
 352  */
 353 static void print_status_bar(void)
 354 {
 355         char *tmp;
 356
 357         if (!curses_active)
 358                 return;
 359         tmp = para_strdup(STANDARD_STATUS_BAR);
 360         wmove(sb.win, 0, 0);
 361         align_str(sb.win, tmp, sb.cols, CENTER);
 362         free(tmp);
 363         wrefresh(sb.win);
 364 }
 365
 366 /*
 367  * get the number of the oldest rbe that is (partially) visible. On return,
 368  * lines contains the sum of the number of lines of all visable entries. If the
 369  * first one is only partially visible, lines is greater than bot.lines.
 370  */
 371 static int first_visible_rbe(unsigned *lines)
 372 {
 373         int i;
 374         *lines = 0;
 375         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 376                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 377                 int rbe_lines;
 378                 if (!rbe)
 379                         return i - 1;
 380 //              fprintf(stderr, "found: %s\n", rbe->msg);
 381                 rbe_lines = NUM_LINES(rbe->len);
 382                 if (rbe_lines > bot.lines)
 383                         return -1;
 384                 *lines += rbe_lines;
 385                 if (*lines >= bot.lines)
 386                         return i;
 387         }
 388         return RINGBUFFER_SIZE - 1;
 389 }
 390
 391 static int draw_top_rbe(unsigned *lines)
 392 {
 393         unsigned len;
 394         int offset, fvr = first_visible_rbe(lines);
 395         struct rb_entry *rbe;
 396
 397         if (fvr < 0)
 398                 return -1;
 399         wmove(bot.win, 0, 0);
 400         rbe = ringbuffer_get(bot_win_rb, fvr);
 401         if (!rbe)
 402                 return -1;
 403         len = strlen(rbe->msg);
 404         if (*lines > bot.lines) {
 405                 /* first rbe is only partially visible */
 406                 offset = (*lines - bot.lines) * bot.cols;
 407                 assert(offset <= len);
 408         } else
 409                 offset = 0;
 410         wattron(bot.win, COLOR_PAIR(rbe->color));
 411         waddstr(bot.win, rbe->msg + offset);
 412         *lines = NUM_LINES(len - offset);
 413         return fvr;
 414 }
 415
 416 static void redraw_bot_win(void)
 417 {
 418         unsigned lines;
 419         int i;
 420
 421         wmove(bot.win, 0, 0);
 422         wclear(bot.win);
 423         i = draw_top_rbe(&lines);
 424         if (i <= 0)
 425                 goto out;
 426         while (i > 0 && lines < bot.lines) {
 427                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 428                 if (!rbe) {
 429                         lines++;
 430                         waddstr(bot.win, "\n");
 431                         continue;
 432                 }
 433                 lines += NUM_LINES(rbe->len);
 434                 wattron(bot.win, COLOR_PAIR(rbe->color));
 435                 waddstr(bot.win, "\n");
 436                 waddstr(bot.win, rbe->msg);
 437         }
 438 out:
 439         wrefresh(bot.win);
 440 }
 441
 442 static void rb_add_entry(int color, char *msg)
 443 {
 444         struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
 445         int x, y;
 446         new->color = color;
 447         new->len = strlen(msg);
 448         new->msg = msg;
 449         old = ringbuffer_add(bot_win_rb, new);
 450 //      fprintf(stderr, "added: %s\n", new->msg);
 451         if (old) {
 452                 free(old->msg);
 453                 free(old);
 454         }
 455         if (scroll_position) {
 456                 /* discard current scrolling, like xterm does */
 457                 scroll_position = 0;
 458                 redraw_bot_win();
 459                 return;
 460         }
 461         wattron(bot.win, COLOR_PAIR(color));
 462         getyx(bot.win, y, x);
 463         if (y || x)
 464                 waddstr(bot.win, "\n");
 465         waddstr(bot.win, msg);
 466 }
 467
 468 /*
 469  * print formated output to bot win and refresh
 470  */
 471 __printf_2_3 static void outputf(int color, const char* fmt,...)
 472 {
 473         char *msg;
 474
 475         if (!curses_active)
 476                 return;
 477         PARA_VSPRINTF(fmt, msg);
 478         rb_add_entry(color, msg);
 479         wrefresh(bot.win);
 480 }
 481
 482 static int add_output_line(char *line, __a_unused void *data)
 483 {
 484         if (!curses_active)
 485                 return 1;
 486         rb_add_entry(COLOR_OUTPUT, para_strdup(line));
 487         return 1;
 488 }
 489
 490 static int loglevel;
 491
 492 __printf_2_3 void curses_log(int ll, const char *fmt,...)
 493 {
 494         int color;
 495         char *msg;
 496
 497         if (ll < loglevel || !curses_active)
 498                 return;
 499         switch (ll) {
 500                 case LL_DEBUG:
 501                 case LL_INFO:
 502                 case LL_NOTICE:
 503                         color = COLOR_MSG;
 504                         break;
 505                 default:
 506                         color = COLOR_ERRMSG;
 507         }
 508         PARA_VSPRINTF(fmt, msg);
 509         chop(msg);
 510         rb_add_entry(color, msg);
 511         wrefresh(bot.win);
 512 }
 513 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 514
 515 static void setup_signal_handling(void)
 516 {
 517         signal_pipe = para_signal_init();
 518         para_install_sighandler(SIGINT);
 519         para_install_sighandler(SIGTERM);
 520         para_install_sighandler(SIGCHLD);
 521         para_install_sighandler(SIGWINCH);
 522         para_install_sighandler(SIGUSR1);
 523         para_sigaction(SIGHUP, SIG_IGN);
 524 }
 525
 526 __noreturn static void do_exit(int ret)
 527 {
 528         para_sigaction(SIGTERM, SIG_IGN);
 529         kill(0, SIGTERM);
 530         exit(ret);
 531 }
 532
 533 static void shutdown_curses(void)
 534 {
 535         if (!curses_active)
 536                 return;
 537         def_prog_mode();
 538         curses_active = 0;
 539         endwin();
 540 }
 541
 542 __noreturn static void finish(int ret)
 543 {
 544         shutdown_curses();
 545         do_exit(ret);
 546 }
 547
 548 /*
 549  * exit curses and print given message to stdout/stderr
 550  */
 551 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 552 {
 553         va_list argp;
 554         FILE *outfd = ret? stderr: stdout;
 555
 556         shutdown_curses();
 557         va_start(argp, fmt);
 558         vfprintf(outfd, fmt, argp);
 559         va_end(argp);
 560         do_exit(ret);
 561 }
 562
 563 static void print_welcome(void)
 564 {
 565         if (loglevel > LL_NOTICE)
 566                 return;
 567         outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
 568                 " \"" CODENAME "\". Theme: %s", theme.name);
 569         wclrtoeol(bot.win);
 570 }
 571
 572 /*
 573  * init all windows
 574  */
 575 static void init_wins(int top_lines)
 576 {
 577         int i;
 578
 579         top.lines = top_lines;
 580         top.cols = COLS;
 581         top.begy = 0;
 582         top.begx = 0;
 583
 584         bot.lines = LINES - top.lines - 3;
 585         bot.cols = COLS;
 586         bot.begy = top.lines + 1;
 587         bot.begx = 0;
 588
 589         sb.lines = 1;
 590         sb.cols = COLS;
 591         sb.begy = LINES - 2;
 592         sb.begx = 0;
 593
 594         in.lines = 1;
 595         in.cols = COLS;
 596         in.begy = LINES - 1;
 597         in.begx = 0;
 598
 599         sep.lines = 1;
 600         sep.cols = COLS;
 601         sep.begy = top.lines;
 602         sep.begx = 0;
 603
 604         assume_default_colors(theme.default_fg, theme.default_bg);
 605         if (top.win) {
 606                 mvwin(top.win, top.begy, top.begx);
 607                 wresize(top.win, top.lines, top.cols);
 608
 609                 mvwin(sb.win, sb.begy, sb.begx);
 610                 wresize(sb.win, sb.lines, sb.cols);
 611
 612                 mvwin(sep.win, sep.begy, sep.begx);
 613                 wresize(sep.win, sep.lines, sep.cols);
 614
 615                 mvwin(bot.win, bot.begy, bot.begx);
 616                 wresize(bot.win, bot.lines, bot.cols);
 617
 618                 mvwin(in.win, in.begy, in.begx);
 619                 wresize(in.win, in.lines, in.cols);
 620         } else {
 621                 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
 622                 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
 623                 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
 624                 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
 625                 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
 626                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 627                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 628                 wclear(bot.win);
 629                 wclear(sb.win);
 630                 wclear(in.win);
 631                 scrollok(bot.win, 1);
 632                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 633                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 634                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 635                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 636                 nodelay(top.win, 1);
 637                 nodelay(bot.win, 1);
 638                 nodelay(sb.win, 1);
 639                 nodelay(in.win, 0);
 640
 641                 keypad(top.win, 1);
 642                 keypad(bot.win, 1);
 643                 keypad(sb.win, 1);
 644                 keypad(in.win, 1);
 645                 print_status_bar();
 646         }
 647         wmove(sep.win, 0, 0);
 648         for (i = 1; i <= COLS; i++)
 649                 waddstr(sep.win, theme.sep_str);
 650         wclear(top.win);
 651         //wclear(bot.win);
 652         wnoutrefresh(top.win);
 653         wnoutrefresh(bot.win);
 654         //wnoutrefresh(sb.win);
 655         print_status_bar();
 656         wnoutrefresh(in.win);
 657         wnoutrefresh(sep.win);
 658         doupdate();
 659 }
 660
 661 /*
 662  * Print stat item #i to curses window
 663  */
 664 static void print_stat_item(int i)
 665 {
 666         char *tmp;
 667         struct stat_item_data d = theme.data[i];
 668         char *c = stat_content[i];
 669
 670         if (!curses_active || !d.len || !c)
 671                 return;
 672         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 673         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 674         wrefresh(top.win);
 675         wattron(top.win, COLOR_PAIR(i + 1));
 676         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 677         free(tmp);
 678         wrefresh(top.win);
 679 }
 680
 681 static int update_item(int item_num, char *buf)
 682 {
 683         char **c = stat_content + item_num;
 684
 685         free(*c);
 686         if (buf && buf[0])
 687                 goto dup;
 688         switch (item_num) {
 689         case SI_ARTIST:
 690                 *c = para_strdup("(artist tag not set)");
 691                 goto print;
 692         case SI_TITLE:
 693                 *c = para_strdup("(title tag not set)");
 694                 goto print;
 695         case SI_YEAR:
 696                 *c = para_strdup("????");
 697                 goto print;
 698         case SI_ALBUM:
 699                 *c = para_strdup("(album tag not set)");
 700                 goto print;
 701         case SI_COMMENT:
 702                 *c = para_strdup("(comment tag not set)");
 703                 goto print;
 704         }
 705 dup:
 706         *c = para_strdup(buf);
 707 print:
 708         print_stat_item(item_num);
 709         return 1;
 710 }
 711
 712 static int read_stat_pipe(fd_set *rfds)
 713 {
 714         static char *buf;
 715         static int bufsize, loaded;
 716         int ret, ret2;
 717         size_t sz;
 718
 719         if (stat_pipe < 0)
 720                 return 0;
 721         if (loaded >= bufsize) {
 722                 if (bufsize > 1000 * 1000) {
 723                         loaded = 0;
 724                         return 0;
 725                 }
 726                 bufsize += bufsize + 1000;
 727                 buf = para_realloc(buf, bufsize);
 728         }
 729         assert(loaded < bufsize);
 730         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 731                 rfds, &sz);
 732         loaded += sz;
 733         ret2 = for_each_stat_item(buf, loaded, update_item);
 734         if (ret < 0 || ret2 < 0) {
 735                 loaded = 0;
 736                 return ret2 < 0? ret2 : ret;
 737         }
 738         sz = ret2; /* what is left */
 739         if (sz > 0 && sz < loaded)
 740                 memmove(buf, buf + loaded - sz, sz);
 741         loaded = sz;
 742         return 1;
 743 }
 744
 745 static void print_all_items(void)
 746 {
 747         int i;
 748
 749         if (!curses_active)
 750                 return;
 751         FOR_EACH_STATUS_ITEM(i)
 752                 print_stat_item(i);
 753 }
 754
 755 static void clear_all_items(void)
 756 {
 757         int i;
 758
 759         FOR_EACH_STATUS_ITEM(i) {
 760                 free(stat_content[i]);
 761                 stat_content[i] = para_strdup("");
 762         }
 763 }
 764
 765 static void init_pair_or_die(short pair, short f, short b)
 766 {
 767         if (init_pair(pair, f, b) == ERR)
 768                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 769 }
 770
 771 static void init_colors_or_die(void)
 772 {
 773         int i;
 774
 775         if (!has_colors())
 776                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 777         if (start_color() == ERR)
 778                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 779         FOR_EACH_STATUS_ITEM(i)
 780                 if (theme.data[i].len)
 781                         init_pair_or_die(i + 1, theme.data[i].fg,
 782                                 theme.data[i].bg);
 783         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 784         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 785         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 786         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 787         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 788         init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
 789         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 790         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 791         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 792 }
 793
 794 /* (Re-)initialize the curses library. */
 795 static void init_curses(void)
 796 {
 797         curses_active = 1;
 798         if (top.win && refresh() == ERR) /* refesh is really needed */
 799                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 800         if (LINES < theme.lines_min || COLS < theme.cols_min)
 801                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 802                         " (need at least %dx%d)\n", COLS, LINES,
 803                         theme.cols_min, theme.lines_min);
 804         curs_set(0); /* make cursor invisible, ignore errors */
 805         nonl(); /* do not NL->CR/NL on output, always returns OK */
 806         /* don't echo input */
 807         if (noecho() == ERR)
 808                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 809         /* take input chars one at a time, no wait for \n */
 810         if (cbreak() == ERR)
 811                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 812         init_colors_or_die();
 813         clear(); /* ignore non-fatal errors */
 814         init_wins(theme.top_lines_default);
 815         print_all_items();
 816         // noecho(); /* don't echo input */
 817 }
 818
 819 static void check_sigchld(void)
 820 {
 821         int ret;
 822         pid_t pid;
 823 reap_next_child:
 824         ret = para_reap_child(&pid);
 825         if (ret <= 0)
 826                 return;
 827         if (pid == cmd_pid) {
 828                 cmd_pid = 0;
 829                 cmd_died = 1;
 830         }
 831         goto reap_next_child;
 832 }
 833
 834 /*
 835  * This sucker modifies its first argument. *handler and *arg are
 836  * pointers to 0-terminated strings (inside line). Crap.
 837  */
 838 static int split_key_map(char *line, char **handler, char **arg)
 839 {
 840         if (!(*handler = strchr(line + 1, ':')))
 841                 goto err_out;
 842         **handler = '\0';
 843         (*handler)++;
 844         if (!(*arg = strchr(*handler, ':')))
 845                 goto err_out;
 846         **arg = '\0';
 847         (*arg)++;
 848         return 1;
 849 err_out:
 850         return 0;
 851 }
 852
 853 static int check_key_map_args(void)
 854 {
 855         char *s;
 856         int i, ret = -1;
 857         char *tmp = NULL, *handler, *arg;
 858
 859         for (i = 0; i < conf.key_map_given; ++i) {
 860                 s = conf.key_map_arg[i];
 861                 if (!(*s))
 862                         goto err_out;
 863                 free(tmp);
 864                 tmp = para_strdup(s);
 865                 if (!split_key_map(tmp, &handler, &arg))
 866                         goto err_out;
 867                 if (strlen(handler) != 1)
 868                         goto err_out;
 869                 if (*handler != 'x'
 870                         && *handler != 'd'
 871                         && *handler != 'i'
 872                         && *handler != 'p')
 873                         goto err_out;
 874                 if (*handler != 'i')
 875                         continue;
 876                 if (find_cmd_byname(arg) < 0)
 877                         goto err_out;
 878         }
 879         ret = 0;
 880 err_out:
 881         free(tmp);
 882         return ret;
 883 }
 884
 885 /*
 886  * React to various signal-related events
 887  */
 888 static void handle_signal(int sig)
 889 {
 890         switch (sig) {
 891         case SIGTERM:
 892                 msg_n_exit(EXIT_FAILURE,
 893                         "only the good die young (caught SIGTERM))\n");
 894                 return;
 895         case SIGWINCH:
 896                 if (curses_active) {
 897                         shutdown_curses();
 898                         init_curses();
 899                         redraw_bot_win();
 900                 }
 901                 return;
 902         case SIGINT:
 903                 PARA_WARNING_LOG("caught SIGINT, reset");
 904                 /* Nothing to do. SIGINT killed our child which gets noticed
 905                  * by do_select and resets everything.
 906                  */
 907                 return;
 908         case SIGUSR1:
 909                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
 910                 com_reread_conf();
 911                 return;
 912         case SIGCHLD:
 913                 check_sigchld();
 914                 return;
 915         }
 916 }
 917
 918 static int open_stat_pipe(void)
 919 {
 920         static int init = 1;
 921         int ret, fds[3] = {0, 1, 0};
 922         pid_t pid;
 923
 924         if (init)
 925                 init = 0;
 926         else
 927                 /*
 928                  * Sleep a bit to avoid a busy loop. As the call to sleep() may
 929                  * be interrupted by SIGCHLD, we simply wait until the call
 930                  * succeeds.
 931                  */
 932                 while (sleep(2))
 933                         ; /* nothing */
 934         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 935         if (ret < 0)
 936                 return ret;
 937         ret = mark_fd_nonblocking(fds[1]);
 938         if (ret >= 0)
 939                 return fds[1];
 940         close(fds[1]);
 941         return ret;
 942 }
 943
 944 /*
 945  * This is the core select loop. Besides the (internal) signal
 946  * pipe, the following other fds are checked according to the mode:
 947  *
 948  * GETCH_MODE: check stdin, return when key is pressed
 949  *
 950  * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
 951  * of output has been read or when other end has closed command pipe or
 952  * when any key is pressed.
 953  *
 954  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 955  * is running. During that time curses is disabled.  Returns when
 956  * cmd_pid == 0.
 957  */
 958 static int do_select(int mode)
 959 {
 960         fd_set rfds;
 961         int ret;
 962         int max_fileno;
 963         char command_buf[4096] = "";
 964         int cbo = 0; /* command buf offset */
 965         struct timeval tv;
 966 repeat:
 967         tv.tv_sec = conf.timeout_arg  / 1000;
 968         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 969 //      ret = refresh_status();
 970         FD_ZERO(&rfds);
 971         max_fileno = 0;
 972         if (stat_pipe < 0)
 973                 stat_pipe = open_stat_pipe();
 974         if (stat_pipe >= 0)
 975                 para_fd_set(stat_pipe, &rfds, &max_fileno);
 976         /* signal pipe */
 977         para_fd_set(signal_pipe, &rfds, &max_fileno);
 978         /* command pipe only for COMMAND_MODE */
 979         if (command_pipe >= 0 && mode == COMMAND_MODE)
 980                 para_fd_set(command_pipe, &rfds, &max_fileno);
 981         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 982         if (ret <= 0)
 983                 goto check_return; /* skip fd checks */
 984         /* signals */
 985         ret = para_next_signal(&rfds);
 986         if (ret > 0)
 987                 handle_signal(ret);
 988         /* read command pipe if ready */
 989         if (command_pipe >= 0 && mode == COMMAND_MODE) {
 990                 size_t sz;
 991                 ret = read_nonblock(command_pipe, command_buf + cbo,
 992                         sizeof(command_buf) - 1 - cbo, &rfds, &sz);
 993                 cbo += sz;
 994                 sz = cbo;
 995                 cbo = for_each_line(command_buf, cbo, &add_output_line, NULL);
 996                 if (sz != cbo)
 997                         wrefresh(bot.win);
 998                 if (ret < 0) {
 999                         PARA_NOTICE_LOG("closing command pipe: %s",
1000                                 para_strerror(-ret));
1001                         close(command_pipe);
1002                         command_pipe = -1;
1003                         return 0;
1004                 }
1005         }
1006         ret = read_stat_pipe(&rfds);
1007         if (ret < 0) {
1008                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1009                 close(stat_pipe);
1010                 stat_pipe = -1;
1011                 clear_all_items();
1012                 free(stat_content[SI_BASENAME]);
1013                 stat_content[SI_BASENAME] =
1014                         para_strdup("stat command terminated!?");
1015                 print_all_items();
1016         }
1017 check_return:
1018         switch (mode) {
1019         case COMMAND_MODE:
1020                 ret = wgetch(top.win);
1021                 if (ret != ERR && ret != KEY_RESIZE) {
1022                         if (command_pipe) {
1023                                 close(command_pipe);
1024                                 command_pipe = -1;
1025                         }
1026                         if (cmd_pid)
1027                                 kill(cmd_pid, SIGTERM);
1028                         return -1;
1029                 }
1030                 break;
1031         case GETCH_MODE:
1032                 ret = wgetch(top.win);
1033                 if (ret != ERR && ret != KEY_RESIZE)
1034                         return ret;
1035                 break;
1036         case EXTERNAL_MODE:
1037                 if (cmd_died) {
1038                         cmd_died = 0;
1039                         return 0;
1040                 }
1041         }
1042         goto repeat;
1043 }
1044
1045 /*
1046  * read from command pipe and print data to bot window
1047  */
1048 static int send_output(void)
1049 {
1050         int ret;
1051
1052         if (command_pipe < 0)
1053                 return 0;
1054         ret = mark_fd_nonblocking(command_pipe);
1055         if (ret < 0) {
1056                 close(command_pipe);
1057                 return ret;
1058         }
1059         if (do_select(COMMAND_MODE) >= 0)
1060                 PARA_INFO_LOG("command complete");
1061         else
1062                 PARA_NOTICE_LOG("command aborted");
1063         print_in_bar(COLOR_MSG, " ");
1064         return 1;
1065 }
1066
1067 static int client_cmd_cmdline(char *cmd)
1068 {
1069         int ret, fds[3] = {0, 1, 0};
1070         char *c = make_message(BINDIR "/para_client -- %s", cmd);
1071
1072         outputf(COLOR_COMMAND, "%s", c);
1073         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1074         ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1075         free(c);
1076         if (ret < 0)
1077                 return -1;
1078         command_pipe = fds[1];
1079         return send_output();
1080 }
1081
1082 /*
1083  * exec command and print output to bot win
1084  */
1085 static int display_cmd(char *cmd)
1086 {
1087         int fds[3] = {0, 1, 0};
1088
1089         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1090         outputf(COLOR_COMMAND, "%s", cmd);
1091         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1092                 return -1;
1093         command_pipe = fds[1];
1094         return send_output();
1095 }
1096
1097 /*
1098  * shutdown curses and stat pipe before executing external commands
1099  */
1100 static int external_cmd(char *cmd)
1101 {
1102         int fds[3] = {-1, -1, -1};
1103
1104         if (cmd_pid)
1105                 return -1;
1106         shutdown_curses();
1107         para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1108         cmd_died = 0;
1109         do_select(EXTERNAL_MODE);
1110         init_curses();
1111         return 0;
1112 }
1113
1114 static void print_scroll_msg(void)
1115 {
1116         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1117         int first_rbe = first_visible_rbe(&lines_total);
1118         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1119                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1120 }
1121
1122 static void com_scroll_top(void)
1123 {
1124         int i = RINGBUFFER_SIZE - 1;
1125         unsigned lines = 0;
1126
1127         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1128                 i--;
1129         /* i is oldest entry */
1130         for (; lines < bot.lines && i >= 0; i--) {
1131                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1132                 if (!rbe)
1133                         break;
1134                 lines += NUM_LINES(strlen(rbe->msg));
1135         }
1136         i++;
1137         if (lines > 0 && scroll_position != i) {
1138                 scroll_position = i;
1139                 redraw_bot_win();
1140                 print_scroll_msg();
1141                 return;
1142         }
1143         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1144 }
1145
1146 static void com_cancel_scrolling(void)
1147 {
1148
1149         if (scroll_position == 0) {
1150                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1151                 return;
1152         }
1153         scroll_position = 0;
1154         redraw_bot_win();
1155 }
1156
1157 static void com_page_down(void)
1158 {
1159         unsigned lines = 0;
1160         int i = scroll_position;
1161         while (lines < bot.lines && --i > 0) {
1162                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1163                 if (!rbe)
1164                         break;
1165                 lines += NUM_LINES(strlen(rbe->msg));
1166         }
1167         if (lines) {
1168                 scroll_position = i;
1169                 redraw_bot_win();
1170                 print_scroll_msg();
1171                 return;
1172         }
1173         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1174 }
1175
1176 static void com_page_up(void)
1177 {
1178         unsigned lines;
1179         int fvr = first_visible_rbe(&lines);
1180
1181         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1182                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1183                 return;
1184         }
1185         scroll_position = fvr + 1;
1186         for (; scroll_position > 0; scroll_position--) {
1187                 first_visible_rbe(&lines);
1188                 if (lines == bot.lines)
1189                         break;
1190         }
1191         redraw_bot_win();
1192         print_scroll_msg();
1193 }
1194
1195 static void com_scroll_down(void)
1196 {
1197         struct rb_entry *rbe;
1198         int rbe_lines;
1199
1200         if (!scroll_position) {
1201                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1202                 return;
1203         }
1204         scroll_position--;
1205         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1206         rbe_lines = NUM_LINES(rbe->len);
1207         wscrl(bot.win, rbe_lines);
1208         wmove(bot.win, bot.lines - rbe_lines, 0);
1209         wattron(bot.win, COLOR_PAIR(rbe->color));
1210         waddstr(bot.win, rbe->msg);
1211         wrefresh(bot.win);
1212         print_scroll_msg();
1213 }
1214
1215 static void com_scroll_up(void)
1216 {
1217         struct rb_entry *rbe = NULL;
1218         unsigned lines;
1219         int i, first_rbe, num_scroll;
1220
1221         /* the entry that is going to vanish */
1222         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1223         if (!rbe)
1224                 goto err_out;
1225         num_scroll = NUM_LINES(rbe->len);
1226         first_rbe = first_visible_rbe(&lines);
1227         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1228                 goto err_out;
1229         scroll_position++;
1230         wscrl(bot.win, -num_scroll);
1231         i = draw_top_rbe(&lines);
1232         if (i < 0)
1233                 goto err_out;
1234         while (i > 0 && lines < num_scroll) {
1235                 int rbe_lines;
1236                 rbe = ringbuffer_get(bot_win_rb, --i);
1237                 if (!rbe)
1238                         break;
1239                 rbe_lines = NUM_LINES(rbe->len);
1240                 lines += rbe_lines;
1241 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1242                 wattron(bot.win, COLOR_PAIR(rbe->color));
1243                 waddstr(bot.win, "\n");
1244                 waddstr(bot.win, rbe->msg);
1245                 if (!i)
1246                         break;
1247                 i--;
1248         }
1249         wrefresh(bot.win);
1250         print_scroll_msg();
1251         return;
1252 err_out:
1253         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1254 }
1255
1256 static void com_ll_decr(void)
1257 {
1258         if (loglevel <= LL_DEBUG) {
1259                 print_in_bar(COLOR_ERRMSG,
1260                         "loglevel already at maximal verbosity\n");
1261                 return;
1262         }
1263         loglevel--;
1264         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1265 }
1266
1267 static void com_ll_incr(void)
1268 {
1269         if (loglevel >= LL_EMERG) {
1270                 print_in_bar(COLOR_ERRMSG,
1271                         "loglevel already at minimal verbosity\n");
1272                 return;
1273         }
1274         loglevel++;
1275         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1276 }
1277
1278 /*
1279  * reread configuration, terminate on errors
1280  */
1281 static void com_reread_conf(void)
1282 {
1283         char *cf =configfile_exists();
1284         struct gui_cmdline_parser_params params = {
1285                 .override = 1,
1286                 .initialize = 1,
1287                 .check_required = 0,
1288                 .check_ambiguity = 0,
1289                 .print_errors = 0,
1290         };
1291
1292         if (!cf) {
1293                 PARA_WARNING_LOG("there is no configuration to read");
1294                 return;
1295         }
1296         PARA_INFO_LOG("rereading command line options and config file");
1297         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1298         if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
1299                 PARA_EMERG_LOG("errors in config file");
1300                 finish(EXIT_FAILURE);
1301         }
1302         PARA_NOTICE_LOG("config file reloaded");
1303         if (check_key_map_args() < 0)
1304                 finish(EXIT_FAILURE);
1305 }
1306
1307 static void com_help(void)
1308 {
1309         int i;
1310
1311         for (i = 0; i < conf.key_map_given; ++i) {
1312                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1313                 const char *handler_text = "???", *desc = NULL;
1314
1315                 if (!split_key_map(tmp, &handler, &arg)) {
1316                         free(tmp);
1317                         return;
1318                 }
1319                 switch (*handler) {
1320                         case 'i':
1321                                 handler_text = "internal";
1322                                 desc = command_list[find_cmd_byname(arg)].description;
1323                                 break;
1324                         case 'x': handler_text = "external"; break;
1325                         case 'd': handler_text = "display "; break;
1326                         case 'p': handler_text = "para    "; break;
1327                 }
1328                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1329                         strlen(arg) < 8? "\t" : "",
1330                         desc? desc : "");
1331                 free(tmp);
1332         }
1333         for (i = 0; command_list[i].handler; i++) {
1334                 struct gui_command gc = command_list[i];
1335
1336                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1337                         strlen(gc.name) < 8? "\t" : "",
1338                         gc.description);
1339         }
1340         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1341                 "for more info");
1342 }
1343
1344 static void com_shrink_top_win(void)
1345 {
1346         if (top.lines <= theme.top_lines_min) {
1347                 PARA_WARNING_LOG("can not decrease top window");
1348                 return;
1349         }
1350         init_wins(top.lines - 1);
1351         wclear(top.win);
1352         print_all_items();
1353         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1354 }
1355
1356 static void com_enlarge_top_win(void)
1357 {
1358         if (bot.lines < 3) {
1359                 PARA_WARNING_LOG("can not increase top window");
1360                 return;
1361         }
1362         init_wins(top.lines + 1);
1363         wclear(top.win);
1364         print_all_items();
1365         print_in_bar(COLOR_MSG, "increased top window");
1366 }
1367
1368 static void com_version(void)
1369 {
1370         print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1371                 CODENAME "\"");
1372 }
1373
1374 __noreturn static void com_quit(void)
1375 {
1376         finish(0);
1377 }
1378
1379 static void com_refresh(void)
1380 {
1381         shutdown_curses();
1382         init_curses();
1383 }
1384
1385 static void change_theme(int next)
1386 {
1387         if (next)
1388                 next_theme(&theme);
1389         else
1390                 prev_theme(&theme);
1391         /* This seems to be needed twice, why? */
1392         com_refresh();
1393         com_refresh();
1394         PARA_NOTICE_LOG("new theme: %s", theme.name);
1395 }
1396
1397 static void com_next_theme(void)
1398 {
1399         change_theme(1);
1400 }
1401
1402 static void com_prev_theme(void)
1403 {
1404         change_theme(0);
1405 }
1406
1407
1408 static void handle_command(int c)
1409 {
1410         int i;
1411
1412         /* first check user's key bindings */
1413         for (i = 0; i < conf.key_map_given; ++i) {
1414                 char *tmp, *handler, *arg;
1415
1416                 tmp = para_strdup(conf.key_map_arg[i]);
1417                 if (!split_key_map(tmp, &handler, &arg)) {
1418                         free(tmp);
1419                         return;
1420                 }
1421                 if (strcmp(tmp, km_keyname(c))) {
1422                         free(tmp);
1423                         continue;
1424                 }
1425                 if (*handler == 'd')
1426                         display_cmd(arg);
1427                 else if (*handler == 'x')
1428                         external_cmd(arg);
1429                 else if (*handler == 'p')
1430                         client_cmd_cmdline(arg);
1431                 else if (*handler == 'i') {
1432                         int num = find_cmd_byname(arg);
1433                         if (num >= 0)
1434                                 command_list[num].handler();
1435                 }
1436                 free(tmp);
1437                 return;
1438         }
1439         /* not found, check internal key bindings */
1440         for (i = 0; command_list[i].handler; i++) {
1441                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1442                         command_list[i].handler();
1443                         return;
1444                 }
1445         }
1446         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1447                 km_keyname(c));
1448 }
1449
1450 int main(int argc, char *argv[])
1451 {
1452         int ret;
1453         char *cf;
1454
1455         _argc = argc;
1456         _argv = argv;
1457
1458         if (gui_cmdline_parser(argc, argv, &conf) != 0)
1459                 exit(EXIT_FAILURE);
1460         HANDLE_VERSION_FLAG("gui", conf);
1461         cf = configfile_exists();
1462         if (!cf && conf.config_file_given) {
1463                 fprintf(stderr, "can not read config file %s\n",
1464                         conf.config_file_arg);
1465                 exit(EXIT_FAILURE);
1466         }
1467         if (cf) {
1468                 struct gui_cmdline_parser_params params = {
1469                         .override = 0,
1470                         .initialize = 0,
1471                         .check_required = 0,
1472                         .check_ambiguity = 0,
1473                         .print_errors = 1,
1474                 };
1475                 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
1476                         exit(EXIT_FAILURE);
1477         }
1478         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1479         if (check_key_map_args() < 0) {
1480                 fprintf(stderr, "invalid key map\n");
1481                 exit(EXIT_FAILURE);
1482         }
1483         init_theme_or_die(conf.theme_arg, &theme);
1484         top.lines = theme.top_lines_default;
1485         setup_signal_handling();
1486         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1487         initscr(); /* needed only once, always successful */
1488         init_curses();
1489         print_welcome();
1490         for (;;) {
1491                 print_status_bar();
1492                 ret = do_select(GETCH_MODE);
1493                 if (!ret)
1494                         continue;
1495                 print_in_bar(COLOR_MSG, " ");
1496                 handle_command(ret);
1497         }
1498 }