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 <dirent.h>
  13 #include <curses.h>
  14
  15 #include "gui.cmdline.h"
  16 #include "para.h"
  17 #include "gui.h"
  18 #include "string.h"
  19 #include "ringbuffer.h"
  20 #include "fd.h"
  21 #include "error.h"
  22 #include "list.h"
  23 #include "sched.h"
  24 #include "signal.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         NCURSES_SIZE_T begx;
  37         NCURSES_SIZE_T begy;
  38         NCURSES_SIZE_T cols;
  39         NCURSES_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 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         /* first rbe might be only partially visible */
 404         offset = (*lines - bot.lines) * bot.cols;
 405         len = strlen(rbe->msg);
 406         if (offset < 0 || len < offset)
 407                 return -1;
 408         wattron(bot.win, COLOR_PAIR(rbe->color));
 409         waddstr(bot.win, rbe->msg + offset);
 410         *lines = NUM_LINES(len - offset);
 411         return fvr;
 412 }
 413
 414 static void redraw_bot_win(void)
 415 {
 416         unsigned lines;
 417         int i;
 418
 419         wmove(bot.win, 0, 0);
 420         wclear(bot.win);
 421         i = draw_top_rbe(&lines);
 422         if (i <= 0)
 423                 goto out;
 424         while (i > 0 && lines < bot.lines) {
 425                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 426                 if (!rbe) {
 427                         lines++;
 428                         waddstr(bot.win, "\n");
 429                         continue;
 430                 }
 431                 lines += NUM_LINES(rbe->len);
 432                 wattron(bot.win, COLOR_PAIR(rbe->color));
 433                 waddstr(bot.win, "\n");
 434                 waddstr(bot.win, rbe->msg);
 435         }
 436 out:
 437         wrefresh(bot.win);
 438 }
 439
 440 static void rb_add_entry(int color, char *msg)
 441 {
 442         struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
 443         int x, y;
 444         new->color = color;
 445         new->len = strlen(msg);
 446         new->msg = msg;
 447         old = ringbuffer_add(bot_win_rb, new);
 448 //      fprintf(stderr, "added: %s\n", new->msg);
 449         if (old) {
 450                 free(old->msg);
 451                 free(old);
 452         }
 453         if (scroll_position) {
 454                 /* discard current scrolling, like xterm does */
 455                 scroll_position = 0;
 456                 redraw_bot_win();
 457                 return;
 458         }
 459         wattron(bot.win, COLOR_PAIR(color));
 460         getyx(bot.win, y, x);
 461         if (y || x)
 462                 waddstr(bot.win, "\n");
 463         waddstr(bot.win, msg);
 464 }
 465
 466 /*
 467  * print formated output to bot win and refresh
 468  */
 469 __printf_2_3 static void outputf(int color, const char* fmt,...)
 470 {
 471         char *msg;
 472
 473         if (!curses_active)
 474                 return;
 475         PARA_VSPRINTF(fmt, msg);
 476         rb_add_entry(color, msg);
 477         wrefresh(bot.win);
 478 }
 479
 480 static int add_output_line(char *line, __a_unused void *data)
 481 {
 482         if (!curses_active)
 483                 return 1;
 484         rb_add_entry(COLOR_OUTPUT, para_strdup(line));
 485         return 1;
 486 }
 487
 488 static int loglevel;
 489
 490 __printf_2_3 void para_log(int ll, const char *fmt,...)
 491 {
 492         int color;
 493         char *msg;
 494
 495         if (ll < loglevel || !curses_active)
 496                 return;
 497         switch (ll) {
 498                 case LL_DEBUG:
 499                 case LL_INFO:
 500                 case LL_NOTICE:
 501                         color = COLOR_MSG;
 502                         break;
 503                 default:
 504                         color = COLOR_ERRMSG;
 505         }
 506         PARA_VSPRINTF(fmt, msg);
 507         chop(msg);
 508         rb_add_entry(color, msg);
 509         wrefresh(bot.win);
 510 }
 511
 512 static void setup_signal_handling(void)
 513 {
 514         signal_pipe = para_signal_init();
 515         para_install_sighandler(SIGINT);
 516         para_install_sighandler(SIGTERM);
 517         para_install_sighandler(SIGCHLD);
 518         para_install_sighandler(SIGWINCH);
 519         para_install_sighandler(SIGUSR1);
 520         para_sigaction(SIGHUP, SIG_IGN);
 521 }
 522
 523 __noreturn static void do_exit(int ret)
 524 {
 525         para_sigaction(SIGTERM, SIG_IGN);
 526         kill(0, SIGTERM);
 527         exit(ret);
 528 }
 529
 530 static void shutdown_curses(void)
 531 {
 532         if (!curses_active)
 533                 return;
 534         def_prog_mode();
 535         curses_active = 0;
 536         endwin();
 537 }
 538
 539 __noreturn static void finish(int ret)
 540 {
 541         shutdown_curses();
 542         do_exit(ret);
 543 }
 544
 545 /*
 546  * exit curses and print given message to stdout/stderr
 547  */
 548 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 549 {
 550         va_list argp;
 551         FILE *outfd = ret? stderr: stdout;
 552
 553         shutdown_curses();
 554         va_start(argp, fmt);
 555         vfprintf(outfd, fmt, argp);
 556         va_end(argp);
 557         do_exit(ret);
 558 }
 559
 560 static void print_welcome(void)
 561 {
 562         if (loglevel > LL_NOTICE)
 563                 return;
 564         outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
 565                 " \"" CODENAME "\". Theme: %s", theme.name);
 566         wclrtoeol(bot.win);
 567 }
 568
 569 /*
 570  * init all windows
 571  */
 572 static void init_wins(int top_lines)
 573 {
 574         int i;
 575
 576         top.lines = top_lines;
 577         top.cols = COLS;
 578         top.begy = 0;
 579         top.begx = 0;
 580
 581         bot.lines = LINES - top.lines - 3;
 582         bot.cols = COLS;
 583         bot.begy = top.lines + 1;
 584         bot.begx = 0;
 585
 586         sb.lines = 1;
 587         sb.cols = COLS;
 588         sb.begy = LINES - 2;
 589         sb.begx = 0;
 590
 591         in.lines = 1;
 592         in.cols = COLS;
 593         in.begy = LINES - 1;
 594         in.begx = 0;
 595
 596         sep.lines = 1;
 597         sep.cols = COLS;
 598         sep.begy = top.lines;
 599         sep.begx = 0;
 600
 601         assume_default_colors(theme.default_fg, theme.default_bg);
 602         if (top.win) {
 603                 mvwin(top.win, top.begy, top.begx);
 604                 wresize(top.win, top.lines, top.cols);
 605
 606                 mvwin(sb.win, sb.begy, sb.begx);
 607                 wresize(sb.win, sb.lines, sb.cols);
 608
 609                 mvwin(sep.win, sep.begy, sep.begx);
 610                 wresize(sep.win, sep.lines, sep.cols);
 611
 612                 mvwin(bot.win, bot.begy, bot.begx);
 613                 wresize(bot.win, bot.lines, bot.cols);
 614
 615                 mvwin(in.win, in.begy, in.begx);
 616                 wresize(in.win, in.lines, in.cols);
 617         } else {
 618                 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
 619                 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
 620                 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
 621                 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
 622                 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
 623                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 624                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 625                 wclear(bot.win);
 626                 wclear(sb.win);
 627                 wclear(in.win);
 628                 scrollok(bot.win, 1);
 629                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 630                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 631                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 632                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 633                 nodelay(top.win, 1);
 634                 nodelay(bot.win, 1);
 635                 nodelay(sb.win, 1);
 636                 nodelay(in.win, 0);
 637
 638                 keypad(top.win, 1);
 639                 keypad(bot.win, 1);
 640                 keypad(sb.win, 1);
 641                 keypad(in.win, 1);
 642                 print_status_bar();
 643         }
 644         wmove(sep.win, 0, 0);
 645         for (i = 1; i <= COLS; i++)
 646                 waddstr(sep.win, theme.sep_str);
 647         wclear(top.win);
 648         //wclear(bot.win);
 649         wnoutrefresh(top.win);
 650         wnoutrefresh(bot.win);
 651         //wnoutrefresh(sb.win);
 652         print_status_bar();
 653         wnoutrefresh(in.win);
 654         wnoutrefresh(sep.win);
 655         doupdate();
 656 }
 657
 658 static void check_geometry(void)
 659 {
 660         if (LINES < theme.lines_min || COLS < theme.cols_min)
 661                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 662                         " (need at least %dx%d)\n", COLS, LINES,
 663                         theme.cols_min, theme.lines_min);
 664 }
 665
 666 /*
 667  * Print stat item #i to curses window
 668  */
 669 static void print_stat_item(int i)
 670 {
 671         char *tmp;
 672         struct stat_item_data d = theme.data[i];
 673         char *c = stat_content[i];
 674
 675         if (!curses_active || !d.len || !c)
 676                 return;
 677         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 678         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 679         wrefresh(top.win);
 680         wattron(top.win, COLOR_PAIR(i + 1));
 681         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 682         free(tmp);
 683         wrefresh(top.win);
 684 }
 685
 686 static int update_item(int item_num, char *buf)
 687 {
 688         char **c = stat_content + item_num;
 689
 690         free(*c);
 691         if (buf && buf[0])
 692                 goto dup;
 693         switch (item_num) {
 694         case SI_ARTIST:
 695                 *c = para_strdup("(artist tag not set)");
 696                 goto print;
 697         case SI_TITLE:
 698                 *c = para_strdup("(title tag not set)");
 699                 goto print;
 700         case SI_YEAR:
 701                 *c = para_strdup("????");
 702                 goto print;
 703         case SI_ALBUM:
 704                 *c = para_strdup("(album tag not set)");
 705                 goto print;
 706         case SI_COMMENT:
 707                 *c = para_strdup("(comment tag not set)");
 708                 goto print;
 709         }
 710 dup:
 711         *c = para_strdup(buf);
 712 print:
 713         print_stat_item(item_num);
 714         return 1;
 715 }
 716
 717 static int read_stat_pipe(fd_set *rfds)
 718 {
 719         static char *buf;
 720         static int bufsize, loaded;
 721         int ret, ret2;
 722         size_t sz;
 723
 724         if (stat_pipe < 0)
 725                 return 0;
 726         if (loaded >= bufsize) {
 727                 if (bufsize > 1000 * 1000) {
 728                         loaded = 0;
 729                         return 0;
 730                 }
 731                 bufsize += bufsize + 1000;
 732                 buf = para_realloc(buf, bufsize);
 733         }
 734         assert(loaded < bufsize);
 735         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 736                 rfds, &sz);
 737         loaded += sz;
 738         ret2 = for_each_stat_item(buf, loaded, update_item);
 739         if (ret < 0 || ret2 < 0) {
 740                 loaded = 0;
 741                 return ret2 < 0? ret2 : ret;
 742         }
 743         sz = ret2; /* what is left */
 744         if (sz > 0 && sz < loaded)
 745                 memmove(buf, buf + loaded - sz, sz);
 746         loaded = sz;
 747         return 1;
 748 }
 749
 750 static void print_all_items(void)
 751 {
 752         int i;
 753
 754         if (!curses_active)
 755                 return;
 756         FOR_EACH_STATUS_ITEM(i)
 757                 print_stat_item(i);
 758 }
 759
 760 static void clear_all_items(void)
 761 {
 762         int i;
 763
 764         FOR_EACH_STATUS_ITEM(i) {
 765                 free(stat_content[i]);
 766                 stat_content[i] = para_strdup("");
 767         }
 768 }
 769
 770 static void init_colors(void)
 771 {
 772         int i;
 773
 774         if (!has_colors())
 775                 msg_n_exit(EXIT_FAILURE, "Error: No color term\n");
 776         start_color();
 777         FOR_EACH_STATUS_ITEM(i)
 778                 if (theme.data[i].len)
 779                         init_pair(i + 1, theme.data[i].fg, theme.data[i].bg);
 780         init_pair(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 781         init_pair(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 782         init_pair(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 783         init_pair(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 784         init_pair(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 785         init_pair(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
 786         init_pair(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 787         init_pair(COLOR_TOP, theme.default_fg, theme.default_bg);
 788         init_pair(COLOR_BOT, theme.default_fg, theme.default_bg);
 789 }
 790
 791 /* (Re-)initialize the curses library. FIXME: Error checking. */
 792 static void init_curses(void)
 793 {
 794         curses_active = 1;
 795         if (top.win && refresh() == ERR) /* refesh is really needed */
 796                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 797         check_geometry();
 798         curs_set(0); /* make cursor invisible, ignore errors */
 799         nonl(); /* tell curses not to do NL->CR/NL on output */
 800         noecho(); /* don't echo input */
 801         cbreak(); /* take input chars one at a time, no wait for \n */
 802         init_colors();
 803         clear();
 804         init_wins(theme.top_lines_default);
 805         print_all_items();
 806         noecho(); /* don't echo input */
 807 }
 808
 809 static void check_sigchld(void)
 810 {
 811         int ret;
 812         pid_t pid;
 813 reap_next_child:
 814         ret = para_reap_child(&pid);
 815         if (ret <= 0)
 816                 return;
 817         if (pid == cmd_pid) {
 818                 cmd_pid = 0;
 819                 cmd_died = 1;
 820         }
 821         goto reap_next_child;
 822 }
 823
 824 /*
 825  * This sucker modifies its first argument. *handler and *arg are
 826  * pointers to 0-terminated strings (inside line). Crap.
 827  */
 828 static int split_key_map(char *line, char **handler, char **arg)
 829 {
 830         if (!(*handler = strchr(line + 1, ':')))
 831                 goto err_out;
 832         **handler = '\0';
 833         (*handler)++;
 834         if (!(*arg = strchr(*handler, ':')))
 835                 goto err_out;
 836         **arg = '\0';
 837         (*arg)++;
 838         return 1;
 839 err_out:
 840         return 0;
 841 }
 842
 843 static int check_key_map_args(void)
 844 {
 845         char *s;
 846         int i, ret = -1;
 847         char *tmp = NULL, *handler, *arg;
 848
 849         for (i = 0; i < conf.key_map_given; ++i) {
 850                 s = conf.key_map_arg[i];
 851                 if (!(*s))
 852                         goto err_out;
 853                 free(tmp);
 854                 tmp = para_strdup(s);
 855                 if (!split_key_map(tmp, &handler, &arg))
 856                         goto err_out;
 857                 if (strlen(handler) != 1)
 858                         goto err_out;
 859                 if (*handler != 'x'
 860                         && *handler != 'd'
 861                         && *handler != 'i'
 862                         && *handler != 'p')
 863                         goto err_out;
 864                 if (*handler != 'i')
 865                         continue;
 866                 if (find_cmd_byname(arg) < 0)
 867                         goto err_out;
 868         }
 869         ret = 0;
 870 err_out:
 871         free(tmp);
 872         return ret;
 873 }
 874
 875 /*
 876  * React to various signal-related events
 877  */
 878 static void handle_signal(int sig)
 879 {
 880         switch (sig) {
 881         case SIGTERM:
 882                 msg_n_exit(EXIT_FAILURE,
 883                         "only the good die young (caught SIGTERM))\n");
 884                 return;
 885         case SIGWINCH:
 886                 if (curses_active) {
 887                         shutdown_curses();
 888                         init_curses();
 889                         redraw_bot_win();
 890                 }
 891                 return;
 892         case SIGINT:
 893                 PARA_WARNING_LOG("caught SIGINT, reset");
 894                 /* Nothing to do. SIGINT killed our child which gets noticed
 895                  * by do_select and resets everything.
 896                  */
 897                 return;
 898         case SIGUSR1:
 899                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
 900                 com_reread_conf();
 901                 return;
 902         case SIGCHLD:
 903                 check_sigchld();
 904                 return;
 905         }
 906 }
 907
 908 static int open_stat_pipe(void)
 909 {
 910         static int init = 1;
 911         int ret, fds[3] = {0, 1, 0};
 912         pid_t pid;
 913
 914         if (init)
 915                 init = 0;
 916         else
 917                 /*
 918                  * Sleep a bit to avoid a busy loop. As the call to sleep() may
 919                  * be interrupted by SIGCHLD, we simply wait until the call
 920                  * succeeds.
 921                  */
 922                 while (sleep(2))
 923                         ; /* nothing */
 924         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 925         if (ret < 0)
 926                 return ret;
 927         ret = mark_fd_nonblocking(fds[1]);
 928         if (ret >= 0)
 929                 return fds[1];
 930         close(fds[1]);
 931         return ret;
 932 }
 933
 934 /*
 935  * This is the core select loop. Besides the (internal) signal
 936  * pipe, the following other fds are checked according to the mode:
 937  *
 938  * GETCH_MODE: check stdin, return when key is pressed
 939  *
 940  * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
 941  * of output has been read or when other end has closed command pipe or
 942  * when any key is pressed.
 943  *
 944  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 945  * is running. During that time curses is disabled.  Returns when
 946  * cmd_pid == 0.
 947  */
 948 static int do_select(int mode)
 949 {
 950         fd_set rfds;
 951         int ret;
 952         int max_fileno;
 953         char command_buf[4096] = "";
 954         int cbo = 0; /* command buf offset */
 955         struct timeval tv;
 956 repeat:
 957         tv.tv_sec = conf.timeout_arg  / 1000;
 958         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 959 //      ret = refresh_status();
 960         FD_ZERO(&rfds);
 961         max_fileno = 0;
 962         if (stat_pipe < 0)
 963                 stat_pipe = open_stat_pipe();
 964         if (stat_pipe >= 0)
 965                 para_fd_set(stat_pipe, &rfds, &max_fileno);
 966         /* signal pipe */
 967         para_fd_set(signal_pipe, &rfds, &max_fileno);
 968         /* command pipe only for COMMAND_MODE */
 969         if (command_pipe >= 0 && mode == COMMAND_MODE)
 970                 para_fd_set(command_pipe, &rfds, &max_fileno);
 971         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 972         if (ret <= 0)
 973                 goto check_return; /* skip fd checks */
 974         /* signals */
 975         ret = para_next_signal(&rfds);
 976         if (ret > 0)
 977                 handle_signal(ret);
 978         /* read command pipe if ready */
 979         if (command_pipe >= 0 && mode == COMMAND_MODE) {
 980                 size_t sz;
 981                 ret = read_nonblock(command_pipe, command_buf + cbo,
 982                         sizeof(command_buf) - 1 - cbo, &rfds, &sz);
 983                 cbo += sz;
 984                 sz = cbo;
 985                 cbo = for_each_line(command_buf, cbo, &add_output_line, NULL);
 986                 if (sz != cbo)
 987                         wrefresh(bot.win);
 988                 if (ret < 0) {
 989                         PARA_NOTICE_LOG("closing command pipe: %s",
 990                                 para_strerror(-ret));
 991                         close(command_pipe);
 992                         command_pipe = -1;
 993                         return 0;
 994                 }
 995         }
 996         ret = read_stat_pipe(&rfds);
 997         if (ret < 0) {
 998                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
 999                 close(stat_pipe);
1000                 stat_pipe = -1;
1001                 clear_all_items();
1002                 free(stat_content[SI_BASENAME]);
1003                 stat_content[SI_BASENAME] =
1004                         para_strdup("stat command terminated!?");
1005                 print_all_items();
1006         }
1007 check_return:
1008         switch (mode) {
1009         case COMMAND_MODE:
1010                 ret = wgetch(top.win);
1011                 if (ret != ERR && ret != KEY_RESIZE) {
1012                         if (command_pipe) {
1013                                 close(command_pipe);
1014                                 command_pipe = -1;
1015                         }
1016                         if (cmd_pid)
1017                                 kill(cmd_pid, SIGTERM);
1018                         return -1;
1019                 }
1020                 break;
1021         case GETCH_MODE:
1022                 ret = wgetch(top.win);
1023                 if (ret != ERR && ret != KEY_RESIZE)
1024                         return ret;
1025                 break;
1026         case EXTERNAL_MODE:
1027                 if (cmd_died) {
1028                         cmd_died = 0;
1029                         return 0;
1030                 }
1031         }
1032         goto repeat;
1033 }
1034
1035 /*
1036  * read from command pipe and print data to bot window
1037  */
1038 static int send_output(void)
1039 {
1040         int ret;
1041
1042         if (command_pipe < 0)
1043                 return 0;
1044         ret = mark_fd_nonblocking(command_pipe);
1045         if (ret < 0) {
1046                 close(command_pipe);
1047                 return ret;
1048         }
1049         if (do_select(COMMAND_MODE) >= 0)
1050                 PARA_INFO_LOG("command complete");
1051         else
1052                 PARA_NOTICE_LOG("command aborted");
1053         print_in_bar(COLOR_MSG, " ");
1054         return 1;
1055 }
1056
1057 static int client_cmd_cmdline(char *cmd)
1058 {
1059         int ret, fds[3] = {0, 1, 0};
1060         char *c = make_message(BINDIR "/para_client -- %s", cmd);
1061
1062         outputf(COLOR_COMMAND, "%s", c);
1063         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1064         ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1065         free(c);
1066         if (ret < 0)
1067                 return -1;
1068         command_pipe = fds[1];
1069         return send_output();
1070 }
1071
1072 /*
1073  * exec command and print output to bot win
1074  */
1075 static int display_cmd(char *cmd)
1076 {
1077         int fds[3] = {0, 1, 0};
1078
1079         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1080         outputf(COLOR_COMMAND, "%s", cmd);
1081         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1082                 return -1;
1083         command_pipe = fds[1];
1084         return send_output();
1085 }
1086
1087 /*
1088  * shutdown curses and stat pipe before executing external commands
1089  */
1090 static int external_cmd(char *cmd)
1091 {
1092         int fds[3] = {-1, -1, -1};
1093
1094         if (cmd_pid)
1095                 return -1;
1096         shutdown_curses();
1097         para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1098         cmd_died = 0;
1099         do_select(EXTERNAL_MODE);
1100         init_curses();
1101         return 0;
1102 }
1103
1104 static void print_scroll_msg(void)
1105 {
1106         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1107         int first_rbe = first_visible_rbe(&lines_total);
1108         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1109                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1110 }
1111
1112 static void com_scroll_top(void)
1113 {
1114         int i = RINGBUFFER_SIZE - 1;
1115         unsigned lines = 0;
1116
1117         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1118                 i--;
1119         /* i is oldest entry */
1120         for (; lines < bot.lines && i >= 0; i--) {
1121                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1122                 if (!rbe)
1123                         break;
1124                 lines += NUM_LINES(strlen(rbe->msg));
1125         }
1126         i++;
1127         if (lines > 0 && scroll_position != i) {
1128                 scroll_position = i;
1129                 redraw_bot_win();
1130                 print_scroll_msg();
1131                 return;
1132         }
1133         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1134 }
1135
1136 static void com_cancel_scrolling(void)
1137 {
1138
1139         if (scroll_position == 0) {
1140                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1141                 return;
1142         }
1143         scroll_position = 0;
1144         redraw_bot_win();
1145 }
1146
1147 static void com_page_down(void)
1148 {
1149         unsigned lines = 0;
1150         int i = scroll_position;
1151         while (lines < bot.lines && --i > 0) {
1152                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1153                 if (!rbe)
1154                         break;
1155                 lines += NUM_LINES(strlen(rbe->msg));
1156         }
1157         if (lines) {
1158                 scroll_position = i;
1159                 redraw_bot_win();
1160                 print_scroll_msg();
1161                 return;
1162         }
1163         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1164 }
1165
1166 static void com_page_up(void)
1167 {
1168         unsigned lines;
1169         int fvr = first_visible_rbe(&lines);
1170
1171         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1172                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1173                 return;
1174         }
1175         scroll_position = fvr + 1;
1176         for (; scroll_position > 0; scroll_position--) {
1177                 first_visible_rbe(&lines);
1178                 if (lines == bot.lines)
1179                         break;
1180         }
1181         redraw_bot_win();
1182         print_scroll_msg();
1183 }
1184
1185 static void com_scroll_down(void)
1186 {
1187         struct rb_entry *rbe;
1188         int rbe_lines;
1189
1190         if (!scroll_position) {
1191                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1192                 return;
1193         }
1194         scroll_position--;
1195         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1196         rbe_lines = NUM_LINES(rbe->len);
1197         wscrl(bot.win, rbe_lines);
1198         wmove(bot.win, bot.lines - rbe_lines, 0);
1199         wattron(bot.win, COLOR_PAIR(rbe->color));
1200         waddstr(bot.win, rbe->msg);
1201         wrefresh(bot.win);
1202         print_scroll_msg();
1203 }
1204
1205 static void com_scroll_up(void)
1206 {
1207         struct rb_entry *rbe = NULL;
1208         unsigned lines;
1209         int i, first_rbe, num_scroll;
1210
1211         /* the entry that is going to vanish */
1212         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1213         if (!rbe)
1214                 goto err_out;
1215         num_scroll = NUM_LINES(rbe->len);
1216         first_rbe = first_visible_rbe(&lines);
1217         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1218                 goto err_out;
1219         scroll_position++;
1220         wscrl(bot.win, -num_scroll);
1221         i = draw_top_rbe(&lines);
1222         if (i < 0)
1223                 goto err_out;
1224         while (i > 0 && lines < num_scroll) {
1225                 int rbe_lines;
1226                 rbe = ringbuffer_get(bot_win_rb, --i);
1227                 if (!rbe)
1228                         break;
1229                 rbe_lines = NUM_LINES(rbe->len);
1230                 lines += rbe_lines;
1231 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1232                 wattron(bot.win, COLOR_PAIR(rbe->color));
1233                 waddstr(bot.win, "\n");
1234                 waddstr(bot.win, rbe->msg);
1235                 if (!i)
1236                         break;
1237                 i--;
1238         }
1239         wrefresh(bot.win);
1240         print_scroll_msg();
1241         return;
1242 err_out:
1243         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1244 }
1245
1246 static void com_ll_decr(void)
1247 {
1248         if (loglevel <= LL_DEBUG) {
1249                 print_in_bar(COLOR_ERRMSG,
1250                         "loglevel already at maximal verbosity\n");
1251                 return;
1252         }
1253         loglevel--;
1254         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1255 }
1256
1257 static void com_ll_incr(void)
1258 {
1259         if (loglevel >= LL_EMERG) {
1260                 print_in_bar(COLOR_ERRMSG,
1261                         "loglevel already at minimal verbosity\n");
1262                 return;
1263         }
1264         loglevel++;
1265         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1266 }
1267
1268 /*
1269  * reread configuration, terminate on errors
1270  */
1271 static void com_reread_conf(void)
1272 {
1273         char *cf =configfile_exists();
1274         struct gui_cmdline_parser_params params = {
1275                 .override = 1,
1276                 .initialize = 1,
1277                 .check_required = 0,
1278                 .check_ambiguity = 0,
1279                 .print_errors = 0,
1280         };
1281
1282         if (!cf) {
1283                 PARA_WARNING_LOG("there is no configuration to read");
1284                 return;
1285         }
1286         PARA_INFO_LOG("rereading command line options and config file");
1287         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1288         if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
1289                 PARA_EMERG_LOG("errors in config file");
1290                 finish(EXIT_FAILURE);
1291         }
1292         PARA_NOTICE_LOG("config file reloaded");
1293         if (check_key_map_args() < 0)
1294                 finish(EXIT_FAILURE);
1295 }
1296
1297 static void com_help(void)
1298 {
1299         int i;
1300
1301         for (i = 0; i < conf.key_map_given; ++i) {
1302                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1303                 const char *handler_text = "???", *desc = NULL;
1304
1305                 if (!split_key_map(tmp, &handler, &arg)) {
1306                         free(tmp);
1307                         return;
1308                 }
1309                 switch (*handler) {
1310                         case 'i':
1311                                 handler_text = "internal";
1312                                 desc = command_list[find_cmd_byname(arg)].description;
1313                                 break;
1314                         case 'x': handler_text = "external"; break;
1315                         case 'd': handler_text = "display "; break;
1316                         case 'p': handler_text = "para    "; break;
1317                 }
1318                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1319                         strlen(arg) < 8? "\t" : "",
1320                         desc? desc : "");
1321                 free(tmp);
1322         }
1323         for (i = 0; command_list[i].handler; i++) {
1324                 struct gui_command gc = command_list[i];
1325
1326                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1327                         strlen(gc.name) < 8? "\t" : "",
1328                         gc.description);
1329         }
1330         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1331                 "for more info");
1332 }
1333
1334 static void com_shrink_top_win(void)
1335 {
1336         if (top.lines <= theme.top_lines_min) {
1337                 PARA_WARNING_LOG("can not decrease top window");
1338                 return;
1339         }
1340         init_wins(top.lines - 1);
1341         wclear(top.win);
1342         print_all_items();
1343         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1344 }
1345
1346 static void com_enlarge_top_win(void)
1347 {
1348         if (bot.lines < 3) {
1349                 PARA_WARNING_LOG("can not increase top window");
1350                 return;
1351         }
1352         init_wins(top.lines + 1);
1353         wclear(top.win);
1354         print_all_items();
1355         print_in_bar(COLOR_MSG, "increased top window");
1356 }
1357
1358 static void com_version(void)
1359 {
1360         print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1361                 CODENAME "\"");
1362 }
1363
1364 __noreturn static void com_quit(void)
1365 {
1366         finish(0);
1367 }
1368
1369 static void com_refresh(void)
1370 {
1371         shutdown_curses();
1372         init_curses();
1373 }
1374
1375 static void change_theme(int next)
1376 {
1377         if (next)
1378                 next_theme(&theme);
1379         else
1380                 prev_theme(&theme);
1381         /* This seems to be needed twice, why? */
1382         com_refresh();
1383         com_refresh();
1384         PARA_NOTICE_LOG("new theme: %s", theme.name);
1385 }
1386
1387 static void com_next_theme(void)
1388 {
1389         change_theme(1);
1390 }
1391
1392 static void com_prev_theme(void)
1393 {
1394         change_theme(0);
1395 }
1396
1397
1398 static void handle_command(int c)
1399 {
1400         int i;
1401
1402         /* first check user's key bindings */
1403         for (i = 0; i < conf.key_map_given; ++i) {
1404                 char *tmp, *handler, *arg;
1405
1406                 tmp = para_strdup(conf.key_map_arg[i]);
1407                 if (!split_key_map(tmp, &handler, &arg)) {
1408                         free(tmp);
1409                         return;
1410                 }
1411                 if (strcmp(tmp, km_keyname(c))) {
1412                         free(tmp);
1413                         continue;
1414                 }
1415                 if (*handler == 'd')
1416                         display_cmd(arg);
1417                 else if (*handler == 'x')
1418                         external_cmd(arg);
1419                 else if (*handler == 'p')
1420                         client_cmd_cmdline(arg);
1421                 else if (*handler == 'i') {
1422                         int num = find_cmd_byname(arg);
1423                         if (num >= 0)
1424                                 command_list[num].handler();
1425                 }
1426                 free(tmp);
1427                 return;
1428         }
1429         /* not found, check internal key bindings */
1430         for (i = 0; command_list[i].handler; i++) {
1431                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1432                         command_list[i].handler();
1433                         return;
1434                 }
1435         }
1436         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1437                 km_keyname(c));
1438 }
1439
1440 int main(int argc, char *argv[])
1441 {
1442         int ret;
1443         char *cf;
1444
1445         _argc = argc;
1446         _argv = argv;
1447
1448         if (gui_cmdline_parser(argc, argv, &conf) != 0)
1449                 exit(EXIT_FAILURE);
1450         HANDLE_VERSION_FLAG("gui", conf);
1451         cf = configfile_exists();
1452         if (!cf && conf.config_file_given) {
1453                 fprintf(stderr, "can not read config file %s\n",
1454                         conf.config_file_arg);
1455                 exit(EXIT_FAILURE);
1456         }
1457         if (cf) {
1458                 struct gui_cmdline_parser_params params = {
1459                         .override = 0,
1460                         .initialize = 0,
1461                         .check_required = 0,
1462                         .check_ambiguity = 0,
1463                         .print_errors = 1,
1464                 };
1465                 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
1466                         exit(EXIT_FAILURE);
1467         }
1468         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1469         if (check_key_map_args() < 0) {
1470                 fprintf(stderr, "invalid key map\n");
1471                 exit(EXIT_FAILURE);
1472         }
1473         init_theme_or_die(conf.theme_arg, &theme);
1474         top.lines = theme.top_lines_default;
1475         setup_signal_handling();
1476         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1477         initscr(); /* needed only once, always successful */
1478         init_curses();
1479         print_welcome();
1480         for (;;) {
1481                 print_status_bar();
1482                 ret = do_select(GETCH_MODE);
1483                 if (!ret)
1484                         continue;
1485                 print_in_bar(COLOR_MSG, " ");
1486                 handle_command(ret);
1487         }
1488 }