gui.c

   1 /*
   2  * Copyright (C) 1998-2014 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file gui.c Curses-based interface for paraslash. */
   8
   9 #include <regex.h>
  10 #include <signal.h>
  11 #include <sys/types.h>
  12 #include <curses.h>
  13 #include <locale.h>
  14 #include <sys/time.h>
  15
  16 #include "gui.cmdline.h"
  17 #include "para.h"
  18 #include "gui.h"
  19 #include "string.h"
  20 #include "ringbuffer.h"
  21 #include "fd.h"
  22 #include "error.h"
  23 #include "list.h"
  24 #include "sched.h"
  25 #include "signal.h"
  26 #include "ggo.h"
  27 #include "version.h"
  28
  29 /** define the array of error lists needed by para_gui */
  30 INIT_GUI_ERRLISTS;
  31 static char *stat_content[NUM_STAT_ITEMS];
  32
  33 static int signal_pipe;
  34
  35 static struct gui_window {
  36         WINDOW *win;
  37         size_t cols;
  38         size_t lines;
  39 } top, bot, sb, in, sep;
  40
  41 #define RINGBUFFER_SIZE 512
  42 struct rb_entry {
  43         char *msg;
  44         size_t len;
  45         int color;
  46 };
  47 static struct ringbuffer *bot_win_rb;
  48 #define NUM_LINES(len) (1 + (len) / bot.cols)
  49
  50 static unsigned scroll_position;
  51
  52 static bool curses_active;
  53 static pid_t cmd_pid;
  54
  55 static int command_fds[2] = {-1, -1};
  56 static int stat_pipe = -1;
  57 static struct gui_args_info conf;
  58
  59 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  60
  61
  62 /**
  63  * Codes for various colors.
  64  *
  65  * Each status item has its own color pair. The ones defined here start at a
  66  * higher number so that they do not overlap with these.
  67  */
  68 enum gui_color_pair {
  69         COLOR_STATUSBAR = NUM_STAT_ITEMS + 1,
  70         COLOR_COMMAND,
  71         COLOR_OUTPUT,
  72         COLOR_MSG,
  73         COLOR_ERRMSG,
  74         COLOR_SEPARATOR,
  75         COLOR_TOP,
  76         COLOR_BOT,
  77 };
  78
  79 struct gui_command {
  80         const char *key;
  81         const char *name;
  82         const char *description;
  83         void (*handler)(void);
  84 };
  85
  86 static struct gui_theme theme;
  87
  88 static int _argc;
  89 static char **_argv;
  90
  91 static void com_help(void);
  92 static void com_reread_conf(void);
  93 static void com_enlarge_top_win(void);
  94 static void com_shrink_top_win(void);
  95 static void com_version(void);
  96 __noreturn static void com_quit(void);
  97 static void com_refresh(void);
  98 static void com_ll_incr(void);
  99 static void com_ll_decr(void);
 100 static void com_prev_theme(void);
 101 static void com_next_theme(void);
 102 static void com_scroll_up(void);
 103 static void com_scroll_down(void);
 104 static void com_page_up(void);
 105 static void com_page_down(void);
 106 static void com_cancel_scrolling(void);
 107 static void com_scroll_top(void);
 108
 109 static struct gui_command command_list[] = {
 110         {
 111                 .key = "?",
 112                 .name = "help",
 113                 .description = "print help",
 114                 .handler = com_help
 115         }, {
 116                 .key = "+",
 117                 .name = "enlarge_win",
 118                 .description = "enlarge the top window",
 119                 .handler = com_enlarge_top_win
 120         }, {
 121                 .key = "-",
 122                 .name = "shrink_win",
 123                 .description = "shrink the top window",
 124                 .handler = com_shrink_top_win
 125         }, {
 126                 .key = "r",
 127                 .name = "reread_conf",
 128                 .description = "reread configuration file",
 129                 .handler = com_reread_conf
 130         }, {
 131                 .key = "q",
 132                 .name = "quit",
 133                 .description = "exit para_gui",
 134                 .handler = com_quit
 135         }, {
 136                 .key = "^L",
 137                 .name = "refresh",
 138                 .description = "redraw the screen",
 139                 .handler = com_refresh
 140         }, {
 141                 .key = ".",
 142                 .name = "next_theme",
 143                 .description = "switch to next theme",
 144                 .handler = com_next_theme
 145         }, {
 146                 .key = ",",
 147                 .name = "prev_theme",
 148                 .description = "switch to previous stream",
 149                 .handler = com_prev_theme
 150         }, {
 151                 .key = ">",
 152                 .name = "ll_incr",
 153                 .description = "increase loglevel (decreases verbosity)",
 154                 .handler = com_ll_incr
 155         }, {
 156                 .key = "<",
 157                 .name = "ll_decr",
 158                 .description = "decrease loglevel (increases verbosity)",
 159                 .handler = com_ll_decr
 160         }, {
 161                 .key = "V",
 162                 .name = "version",
 163                 .description = "show the para_gui version",
 164                 .handler = com_version
 165         }, {
 166                 .key = "<up>",
 167                 .name = "scroll_up",
 168                 .description = "scroll up one line",
 169                 .handler = com_scroll_up
 170         }, {
 171                 .key = "<down>",
 172                 .name = "scroll_down",
 173                 .description = "scroll down one line",
 174                 .handler = com_scroll_down
 175         }, {
 176                 .key = "<ppage>",
 177                 .name = "page_up",
 178                 .description = "scroll up one page",
 179                 .handler = com_page_up
 180         }, {
 181                 .key = "<npage>",
 182                 .name = "page_down",
 183                 .description = "scroll down one page",
 184                 .handler = com_page_down
 185         }, {
 186                 .key = "<home>",
 187                 .name = "scroll_top",
 188                 .description = "scroll to top of buffer",
 189                 .handler = com_scroll_top
 190         }, {
 191                 .key = "<end>",
 192                 .name = "cancel_scroll",
 193                 .description = "deactivate scroll mode",
 194                 .handler = com_cancel_scrolling
 195         }, {
 196                 .handler = NULL
 197         }
 198 };
 199
 200 static int find_cmd_byname(char *name)
 201 {
 202         int i;
 203
 204         for (i = 0; command_list[i].handler; i++)
 205                 if (!strcmp(command_list[i].name, name))
 206                         return i;
 207         return -1;
 208 }
 209
 210 /* taken from mutt */
 211 static char *km_keyname(int c)
 212 {
 213         static char buf[10];
 214
 215         if (c == KEY_UP) {
 216                 sprintf(buf, "<up>");
 217                 return buf;
 218         }
 219         if (c == KEY_DOWN) {
 220                 sprintf(buf, "<down>");
 221                 return buf;
 222         }
 223         if (c == KEY_LEFT) {
 224                 sprintf(buf, "<left>");
 225                 return buf;
 226         }
 227         if (c == KEY_RIGHT) {
 228                 sprintf(buf, "<right>");
 229                 return buf;
 230         }
 231         if (c == KEY_NPAGE) {
 232                 sprintf(buf, "<npage>");
 233                 return buf;
 234         }
 235         if (c == KEY_PPAGE) {
 236                 sprintf(buf, "<ppage>");
 237                 return buf;
 238         }
 239         if (c == KEY_HOME) {
 240                 sprintf(buf, "<home>");
 241                 return buf;
 242         }
 243         if (c == KEY_END) {
 244                 sprintf(buf, "<end>");
 245                 return buf;
 246         }
 247         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 248                 if (c < 0)
 249                         c += 256;
 250                 if (c < 128) {
 251                         buf[0] = '^';
 252                         buf[1] = (c + '@') & 0x7f;
 253                         buf[2] = 0;
 254                 } else
 255                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 256                                 (c >> 3) & 7, c & 7);
 257         } else if (c >= KEY_F0 && c < KEY_F(256))
 258                 sprintf(buf, "<F%d>", c - KEY_F0);
 259         else if (isprint(c))
 260                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 261         else
 262                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 263         return buf;
 264 }
 265
 266 static char *configfile_exists(void)
 267 {
 268         static char *config_file;
 269         char *tmp;
 270
 271         if (!conf.config_file_given) {
 272                 if (!config_file) {
 273                         char *home = para_homedir();
 274                         config_file = make_message("%s/.paraslash/gui.conf",
 275                                 home);
 276                         free(home);
 277                 }
 278                 tmp = config_file;
 279         } else
 280                 tmp = conf.config_file_arg;
 281         return file_exists(tmp)? tmp: NULL;
 282 }
 283
 284 /* Print given number of spaces to curses window. */
 285 static void add_spaces(WINDOW* win, unsigned int num)
 286 {
 287         char space[] = "                                ";
 288         unsigned sz = sizeof(space) - 1; /* number of spaces */
 289
 290         while (num >= sz)  {
 291                 waddstr(win, space);
 292                 num -= sz;
 293         }
 294         if (num > 0) {
 295                 assert(num < sz);
 296                 space[num] = '\0';
 297                 waddstr(win, space);
 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 ret, i, num; /* of spaces */
 309         size_t width;
 310
 311         if (!win || !str)
 312                 return 0;
 313         ret = strwidth(str, &width);
 314         if (ret < 0) {
 315                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 316                 width = 0;
 317                 str[0] = '\0';
 318         }
 319         num = len - width;
 320         if (num < 0) {
 321                 str[len] = '\0';
 322                 num = 0;
 323         }
 324         /* replace control characters by spaces */
 325         for (i = 0; i < len && str[i]; i++) {
 326                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 327                         str[i] = ' ';
 328         }
 329         if (align == LEFT) {
 330                 waddstr(win, str);
 331                 add_spaces(win, num);
 332         } else if (align == RIGHT) {
 333                 add_spaces(win, num);
 334                 waddstr(win, str);
 335         } else {
 336                 add_spaces(win, num / 2);
 337                 waddstr(win, str[0]? str: "");
 338                 add_spaces(win, num - num / 2);
 339         }
 340         return 1;
 341 }
 342
 343 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 344 {
 345         char *msg;
 346         va_list ap;
 347
 348         if (!curses_active)
 349                 return;
 350         wattron(in.win, COLOR_PAIR(color));
 351         va_start(ap, fmt);
 352         xvasprintf(&msg, fmt, ap);
 353         va_end(ap);
 354         wmove(in.win, 0, 0);
 355         align_str(in.win, msg, in.cols, LEFT);
 356         free(msg);
 357         wrefresh(in.win);
 358 }
 359
 360 static void print_status_bar(void)
 361 {
 362         char *tmp;
 363
 364         tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
 365         wmove(sb.win, 0, 0);
 366         align_str(sb.win, tmp, sb.cols, CENTER);
 367         free(tmp);
 368 }
 369
 370 /*
 371  * get the number of the oldest rbe that is (partially) visible. On return,
 372  * lines contains the sum of the number of lines of all visible entries. If the
 373  * first one is only partially visible, lines is greater than bot.lines.
 374  */
 375 static int first_visible_rbe(unsigned *lines)
 376 {
 377         int i;
 378         *lines = 0;
 379         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 380                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 381                 int rbe_lines;
 382                 if (!rbe)
 383                         return i - 1;
 384 //              fprintf(stderr, "found: %s\n", rbe->msg);
 385                 rbe_lines = NUM_LINES(rbe->len);
 386                 if (rbe_lines > bot.lines)
 387                         return -1;
 388                 *lines += rbe_lines;
 389                 if (*lines >= bot.lines)
 390                         return i;
 391         }
 392         return RINGBUFFER_SIZE - 1;
 393 }
 394
 395 /*
 396 returns number of first visible rbe, *lines is the number of lines drawn.
 397  */
 398 static int draw_top_rbe(unsigned *lines)
 399 {
 400         int ret, fvr = first_visible_rbe(lines);
 401         struct rb_entry *rbe;
 402         size_t bytes_to_skip, cells_to_skip, width;
 403
 404         if (fvr < 0)
 405                 return -1;
 406         wmove(bot.win, 0, 0);
 407         rbe = ringbuffer_get(bot_win_rb, fvr);
 408         if (!rbe)
 409                 return -1;
 410         if (*lines > bot.lines) {
 411                 /* rbe is partially visible multi-line */
 412                 cells_to_skip = (*lines - bot.lines) * bot.cols;
 413                 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
 414                 if (ret < 0)
 415                         return ret;
 416                 ret = strwidth(rbe->msg + bytes_to_skip, &width);
 417                 if (ret < 0)
 418                         return ret;
 419         } else {
 420                 bytes_to_skip = 0;
 421                 width = rbe->len;
 422         }
 423         wattron(bot.win, COLOR_PAIR(rbe->color));
 424         waddstr(bot.win, rbe->msg + bytes_to_skip);
 425         *lines = NUM_LINES(width);
 426         return fvr;
 427 }
 428
 429 static void redraw_bot_win(void)
 430 {
 431         unsigned lines;
 432         int i;
 433
 434         wmove(bot.win, 0, 0);
 435         wclear(bot.win);
 436         i = draw_top_rbe(&lines);
 437         if (i <= 0)
 438                 goto out;
 439         while (i > 0 && lines < bot.lines) {
 440                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 441                 if (!rbe) {
 442                         lines++;
 443                         waddstr(bot.win, "\n");
 444                         continue;
 445                 }
 446                 lines += NUM_LINES(rbe->len);
 447                 wattron(bot.win, COLOR_PAIR(rbe->color));
 448                 waddstr(bot.win, "\n");
 449                 waddstr(bot.win, rbe->msg);
 450         }
 451 out:
 452         wrefresh(bot.win);
 453 }
 454
 455 static void rb_add_entry(int color, char *msg)
 456 {
 457         struct rb_entry *old, *new;
 458         int x, y;
 459         size_t len;
 460
 461         if (strwidth(msg, &len) < 0)
 462                 return;
 463         new = para_malloc(sizeof(struct rb_entry));
 464         new->color = color;
 465         new->len = len;
 466         new->msg = msg;
 467         old = ringbuffer_add(bot_win_rb, new);
 468 //      fprintf(stderr, "added: %s\n", new->msg);
 469         if (old) {
 470                 free(old->msg);
 471                 free(old);
 472         }
 473         if (scroll_position) {
 474                 /* discard current scrolling, like xterm does */
 475                 scroll_position = 0;
 476                 redraw_bot_win();
 477                 return;
 478         }
 479         wattron(bot.win, COLOR_PAIR(color));
 480         getyx(bot.win, y, x);
 481         if (y || x)
 482                 waddstr(bot.win, "\n");
 483         waddstr(bot.win, msg);
 484 }
 485
 486 /*
 487  * print formated output to bot win and refresh
 488  */
 489 __printf_2_3 static void outputf(int color, const char* fmt,...)
 490 {
 491         char *msg;
 492         va_list ap;
 493
 494         if (!curses_active)
 495                 return;
 496         va_start(ap, fmt);
 497         xvasprintf(&msg, fmt, ap);
 498         va_end(ap);
 499         rb_add_entry(color, msg);
 500         wrefresh(bot.win);
 501 }
 502
 503 static int add_output_line(char *line, void *data)
 504 {
 505         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 506
 507         if (!curses_active)
 508                 return 1;
 509         rb_add_entry(color, para_strdup(line));
 510         return 1;
 511 }
 512
 513 static int loglevel;
 514
 515 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
 516 {
 517         int color;
 518         char *msg;
 519         va_list ap;
 520         unsigned bytes;
 521
 522         if (ll < loglevel || !curses_active)
 523                 return;
 524         switch (ll) {
 525                 case LL_DEBUG:
 526                 case LL_INFO:
 527                 case LL_NOTICE:
 528                         color = COLOR_MSG;
 529                         break;
 530                 default:
 531                         color = COLOR_ERRMSG;
 532         }
 533         va_start(ap, fmt);
 534         bytes = xvasprintf(&msg, fmt, ap);
 535         va_end(ap);
 536         if (bytes > 0 && msg[bytes - 1] == '\n')
 537                 msg[bytes - 1] = '\0'; /* cut trailing newline */
 538         rb_add_entry(color, msg);
 539         wrefresh(bot.win);
 540 }
 541 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 542
 543 static void setup_signal_handling(void)
 544 {
 545         signal_pipe = para_signal_init();
 546         para_install_sighandler(SIGINT);
 547         para_install_sighandler(SIGTERM);
 548         para_install_sighandler(SIGCHLD);
 549         para_install_sighandler(SIGWINCH);
 550         para_install_sighandler(SIGUSR1);
 551 }
 552
 553 /* kill every process in the process group and exit */
 554 __noreturn static void kill_pg_and_die(int ret)
 555 {
 556         para_sigaction(SIGTERM, SIG_IGN);
 557         kill(0, SIGTERM);
 558         exit(ret);
 559 }
 560
 561 static void shutdown_curses(void)
 562 {
 563         if (!curses_active)
 564                 return;
 565         def_prog_mode();
 566         curses_active = false;
 567         endwin();
 568 }
 569
 570 __noreturn static void finish(int ret)
 571 {
 572         shutdown_curses();
 573         kill_pg_and_die(ret);
 574 }
 575
 576 /*
 577  * exit curses and print given message to stdout/stderr
 578  */
 579 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 580 {
 581         va_list argp;
 582         FILE *outfd = ret? stderr: stdout;
 583
 584         shutdown_curses();
 585         va_start(argp, fmt);
 586         vfprintf(outfd, fmt, argp);
 587         va_end(argp);
 588         kill_pg_and_die(ret);
 589 }
 590
 591 /*
 592  * init all windows
 593  */
 594 static void init_wins(int top_lines)
 595 {
 596         int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
 597                 in_y = LINES - 1, sep_y = top_lines;
 598
 599         top.lines = top_lines;
 600         bot.lines = LINES - top.lines - 3;
 601         sb.lines = in.lines = sep.lines = 1;
 602
 603         top.cols = bot.cols = sb.cols = in.cols = sep.cols = COLS;
 604
 605         assume_default_colors(theme.default_fg, theme.default_bg);
 606         if (top.win) {
 607                 wresize(top.win, top.lines, top.cols);
 608                 mvwin(top.win, top_y, 0);
 609
 610                 wresize(sb.win, sb.lines, sb.cols);
 611                 mvwin(sb.win, sb_y, 0);
 612
 613                 wresize(sep.win, sep.lines, sep.cols);
 614                 mvwin(sep.win, sep_y, 0);
 615
 616                 wresize(bot.win, bot.lines, bot.cols);
 617                 mvwin(bot.win, bot_y, 0);
 618
 619                 wresize(in.win, in.lines, in.cols);
 620                 mvwin(in.win, in_y, 0);
 621         } else {
 622                 sep.win = newwin(sep.lines, sep.cols, sep_y, 0);
 623                 top.win = newwin(top.lines, top.cols, top_y, 0);
 624                 bot.win = newwin(bot.lines, bot.cols, bot_y, 0);
 625                 sb.win = newwin(sb.lines, sb.cols, sb_y, 0);
 626                 in.win = newwin(in.lines, in.cols, in_y, 0);
 627                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 628                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 629                 wclear(bot.win);
 630                 wclear(sb.win);
 631                 wclear(in.win);
 632                 scrollok(bot.win, 1);
 633                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 634                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 635                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 636                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 637                 nodelay(top.win, 1);
 638                 nodelay(bot.win, 1);
 639                 nodelay(sb.win, 1);
 640                 nodelay(in.win, 0);
 641
 642                 keypad(top.win, 1);
 643                 keypad(bot.win, 1);
 644                 keypad(sb.win, 1);
 645                 keypad(in.win, 1);
 646         }
 647         wmove(sep.win, 0, 0);
 648         whline(sep.win, theme.sep_char, COLS);
 649         wclear(top.win);
 650         //wclear(bot.win);
 651         wnoutrefresh(top.win);
 652         wnoutrefresh(bot.win);
 653         print_status_bar();
 654         wnoutrefresh(sb.win);
 655         wnoutrefresh(in.win);
 656         wnoutrefresh(sep.win);
 657         doupdate();
 658 }
 659
 660 /*
 661  * Print stat item #i to curses window
 662  */
 663 static void print_stat_item(int i)
 664 {
 665         char *tmp;
 666         struct stat_item_data d = theme.data[i];
 667         char *c = stat_content[i];
 668
 669         if (!curses_active || !d.len || !c)
 670                 return;
 671         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 672         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 673         wrefresh(top.win);
 674         wattron(top.win, COLOR_PAIR(i + 1));
 675         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 676         free(tmp);
 677         wrefresh(top.win);
 678 }
 679
 680 static int update_item(int item_num, char *buf)
 681 {
 682         char **c = stat_content + item_num;
 683
 684         free(*c);
 685         if (buf && buf[0])
 686                 goto dup;
 687         switch (item_num) {
 688         case SI_ARTIST:
 689                 *c = para_strdup("(artist tag not set)");
 690                 goto print;
 691         case SI_TITLE:
 692                 *c = para_strdup("(title tag not set)");
 693                 goto print;
 694         case SI_YEAR:
 695                 *c = para_strdup("????");
 696                 goto print;
 697         case SI_ALBUM:
 698                 *c = para_strdup("(album tag not set)");
 699                 goto print;
 700         case SI_COMMENT:
 701                 *c = para_strdup("(comment tag not set)");
 702                 goto print;
 703         }
 704 dup:
 705         *c = para_strdup(buf);
 706 print:
 707         print_stat_item(item_num);
 708         return 1;
 709 }
 710
 711 static int read_stat_pipe(fd_set *rfds)
 712 {
 713         static char *buf;
 714         static int bufsize, loaded;
 715         int ret, ret2;
 716         size_t sz;
 717
 718         if (stat_pipe < 0)
 719                 return 0;
 720         if (loaded >= bufsize) {
 721                 if (bufsize > 1000 * 1000) {
 722                         loaded = 0;
 723                         return 0;
 724                 }
 725                 bufsize += bufsize + 1000;
 726                 buf = para_realloc(buf, bufsize);
 727         }
 728         assert(loaded < bufsize);
 729         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 730                 rfds, &sz);
 731         loaded += sz;
 732         ret2 = for_each_stat_item(buf, loaded, update_item);
 733         if (ret < 0 || ret2 < 0) {
 734                 loaded = 0;
 735                 return ret2 < 0? ret2 : ret;
 736         }
 737         sz = ret2; /* what is left */
 738         if (sz > 0 && sz < loaded)
 739                 memmove(buf, buf + loaded - sz, sz);
 740         loaded = sz;
 741         return 1;
 742 }
 743
 744 static void print_all_items(void)
 745 {
 746         int i;
 747
 748         if (!curses_active)
 749                 return;
 750         FOR_EACH_STATUS_ITEM(i)
 751                 print_stat_item(i);
 752 }
 753
 754 static void clear_all_items(void)
 755 {
 756         int i;
 757
 758         FOR_EACH_STATUS_ITEM(i) {
 759                 free(stat_content[i]);
 760                 stat_content[i] = para_strdup("");
 761         }
 762 }
 763
 764 static void init_pair_or_die(short pair, short f, short b)
 765 {
 766         if (init_pair(pair, f, b) == ERR)
 767                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 768 }
 769
 770 static void init_colors_or_die(void)
 771 {
 772         int i;
 773
 774         if (!has_colors())
 775                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 776         if (start_color() == ERR)
 777                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 778         FOR_EACH_STATUS_ITEM(i)
 779                 if (theme.data[i].len)
 780                         init_pair_or_die(i + 1, theme.data[i].fg,
 781                                 theme.data[i].bg);
 782         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 783         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 784         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 785         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 786         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 787         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 788         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 789         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 790 }
 791
 792 /* (Re-)initialize the curses library. */
 793 static void init_curses(void)
 794 {
 795         curses_active = true;
 796         if (top.win && refresh() == ERR) /* refresh is really needed */
 797                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 798         if (LINES < theme.lines_min || COLS < theme.cols_min)
 799                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 800                         " (need at least %dx%d)\n", COLS, LINES,
 801                         theme.cols_min, theme.lines_min);
 802         curs_set(0); /* make cursor invisible, ignore errors */
 803         nonl(); /* do not NL->CR/NL on output, always returns OK */
 804         /* don't echo input */
 805         if (noecho() == ERR)
 806                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 807         /* take input chars one at a time, no wait for \n */
 808         if (cbreak() == ERR)
 809                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 810         init_colors_or_die();
 811         clear(); /* ignore non-fatal errors */
 812         init_wins(theme.top_lines_default);
 813         print_all_items();
 814         // noecho(); /* don't echo input */
 815 }
 816
 817 static void check_sigchld(void)
 818 {
 819         int ret;
 820         pid_t pid;
 821
 822 reap_next_child:
 823         ret = para_reap_child(&pid);
 824         if (ret <= 0)
 825                 return;
 826         if (pid == cmd_pid)
 827                 cmd_pid = 0;
 828         goto reap_next_child;
 829 }
 830
 831 /*
 832  * This sucker modifies its first argument. *handler and *arg are
 833  * pointers to 0-terminated strings (inside line). Crap.
 834  */
 835 static int split_key_map(char *line, char **handler, char **arg)
 836 {
 837         if (!(*handler = strchr(line + 1, ':')))
 838                 goto err_out;
 839         **handler = '\0';
 840         (*handler)++;
 841         if (!(*arg = strchr(*handler, ':')))
 842                 goto err_out;
 843         **arg = '\0';
 844         (*arg)++;
 845         return 1;
 846 err_out:
 847         return 0;
 848 }
 849
 850 static int check_key_map_args(void)
 851 {
 852         char *s;
 853         int i, ret = -1;
 854         char *tmp = NULL, *handler, *arg;
 855
 856         for (i = 0; i < conf.key_map_given; ++i) {
 857                 s = conf.key_map_arg[i];
 858                 if (!(*s))
 859                         goto out;
 860                 free(tmp);
 861                 tmp = para_strdup(s);
 862                 if (!split_key_map(tmp, &handler, &arg))
 863                         goto out;
 864                 if (strlen(handler) != 1)
 865                         goto out;
 866                 if (*handler != 'x'
 867                         && *handler != 'd'
 868                         && *handler != 'i'
 869                         && *handler != 'p')
 870                         goto out;
 871                 if (*handler != 'i')
 872                         continue;
 873                 if (find_cmd_byname(arg) < 0)
 874                         goto out;
 875         }
 876         ret = 0;
 877 out:
 878         free(tmp);
 879         return ret;
 880 }
 881
 882 /*
 883  * React to various signal-related events
 884  */
 885 static void handle_signal(int sig)
 886 {
 887         switch (sig) {
 888         case SIGTERM:
 889                 msg_n_exit(EXIT_FAILURE,
 890                         "only the good die young (caught SIGTERM))\n");
 891                 return;
 892         case SIGWINCH:
 893                 if (curses_active) {
 894                         shutdown_curses();
 895                         init_curses();
 896                         redraw_bot_win();
 897                 }
 898                 return;
 899         case SIGINT:
 900                 PARA_WARNING_LOG("caught SIGINT, reset\n");
 901                 /* Nothing to do. SIGINT killed our child which gets noticed
 902                  * by do_select and resets everything.
 903                  */
 904                 return;
 905         case SIGUSR1:
 906                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
 907                 com_reread_conf();
 908                 return;
 909         case SIGCHLD:
 910                 check_sigchld();
 911                 return;
 912         }
 913 }
 914
 915 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
 916 {
 917         static struct timeval next_exec, atm, diff;
 918         int ret, fds[3] = {0, 1, 0};
 919         pid_t pid;
 920
 921         if (stat_pipe >= 0)
 922                 goto success;
 923         /* Avoid busy loop */
 924         gettimeofday(&atm, NULL);
 925         if (tv_diff(&next_exec, &atm, &diff) > 0) {
 926                 if (tv_diff(&diff, tv, NULL) < 0)
 927                         *tv = diff;
 928                 return;
 929         }
 930         next_exec.tv_sec = atm.tv_sec + 2;
 931         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 932         if (ret < 0)
 933                 return;
 934         ret = mark_fd_nonblocking(fds[1]);
 935         if (ret < 0) {
 936                 close(fds[1]);
 937                 return;
 938         }
 939         stat_pipe = fds[1];
 940 success:
 941         para_fd_set(stat_pipe, rfds, max_fileno);
 942 }
 943
 944 #define COMMAND_BUF_SIZE 32768
 945
 946 /*
 947  * This is the core select loop. Besides the (internal) signal
 948  * pipe, the following other fds are checked according to the mode:
 949  *
 950  * GETCH_MODE: check stdin, return when key is pressed
 951  *
 952  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 953  * stdout and stderr or when any key is pressed.
 954  *
 955  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 956  * is running. During that time curses is disabled.  Returns when
 957  * cmd_pid == 0.
 958  */
 959 static int do_select(int mode)
 960 {
 961         fd_set rfds;
 962         int ret, i, max_fileno;
 963         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 964         int cbo[2] = {0, 0}; /* command buf offsets */
 965         struct timeval tv;
 966         unsigned flags[2] = {0, 0}; /* for for_each_line() */
 967
 968 repeat:
 969         tv.tv_sec = conf.timeout_arg  / 1000;
 970         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 971 //      ret = refresh_status();
 972         FD_ZERO(&rfds);
 973         max_fileno = 0;
 974         status_pre_select(&rfds, &max_fileno, &tv);
 975         /* signal pipe */
 976         para_fd_set(signal_pipe, &rfds, &max_fileno);
 977         /* command pipe only for COMMAND_MODE */
 978         if (mode == COMMAND_MODE) {
 979                 if (command_fds[0] >= 0)
 980                         para_fd_set(command_fds[0], &rfds, &max_fileno);
 981                 if (command_fds[1] >= 0)
 982                         para_fd_set(command_fds[1], &rfds, &max_fileno);
 983         }
 984         if (mode == GETCH_MODE || mode == COMMAND_MODE)
 985                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
 986         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 987         if (ret <= 0)
 988                 goto check_return; /* skip fd checks */
 989         /* signals */
 990         ret = para_next_signal(&rfds);
 991         if (ret > 0)
 992                 handle_signal(ret);
 993         /* read command pipe if ready */
 994         if (mode == COMMAND_MODE) {
 995                 for (i = 0; i < 2; i++) {
 996                         size_t sz;
 997                         if (command_fds[i] < 0)
 998                                 continue;
 999                         ret = read_nonblock(command_fds[i],
1000                                 command_buf[i] + cbo[i],
1001                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1002                         cbo[i] += sz;
1003                         sz = cbo[i];
1004                         cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1005                                 add_output_line, &i);
1006                         if (sz != cbo[i]) { /* at least one line found */
1007                                 wrefresh(bot.win);
1008                                 flags[i] = 0;
1009                         }
1010                         if (ret < 0) {
1011                                 PARA_NOTICE_LOG("closing command fd %d: %s\n",
1012                                         i, para_strerror(-ret));
1013                                 close(command_fds[i]);
1014                                 command_fds[i] = -1;
1015                                 flags[i] = 0;
1016                                 cbo[i] = 0;
1017                                 if (command_fds[!i] < 0) /* both fds closed */
1018                                         return 0;
1019                         }
1020                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1021                                 PARA_NOTICE_LOG("discarding overlong line\n");
1022                                 cbo[i] = 0;
1023                                 flags[i] = FELF_DISCARD_FIRST;
1024                         }
1025                 }
1026         }
1027         ret = read_stat_pipe(&rfds);
1028         if (ret < 0) {
1029                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1030                 close(stat_pipe);
1031                 stat_pipe = -1;
1032                 clear_all_items();
1033                 free(stat_content[SI_BASENAME]);
1034                 stat_content[SI_BASENAME] =
1035                         para_strdup("stat command terminated!?");
1036                 print_all_items();
1037         }
1038 check_return:
1039         switch (mode) {
1040         case COMMAND_MODE:
1041                 ret = wgetch(top.win);
1042                 if (ret != ERR && ret != KEY_RESIZE) {
1043                         if (cmd_pid)
1044                                 kill(cmd_pid, SIGTERM);
1045                         return -1;
1046                 }
1047                 break;
1048         case GETCH_MODE:
1049                 ret = wgetch(top.win);
1050                 if (ret != ERR && ret != KEY_RESIZE)
1051                         return ret;
1052                 break;
1053         case EXTERNAL_MODE:
1054                 if (cmd_pid == 0)
1055                         return 0;
1056         }
1057         goto repeat;
1058 }
1059
1060 /* read from command pipe and print data to bot window */
1061 static void exec_and_display_cmd(const char *cmd)
1062 {
1063         int ret, fds[3] = {0, 1, 1};
1064
1065         outputf(COLOR_COMMAND, "%s", cmd);
1066         ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1067         if (ret < 0)
1068                 return;
1069         ret = mark_fd_nonblocking(fds[1]);
1070         if (ret < 0)
1071                 goto fail;
1072         ret = mark_fd_nonblocking(fds[2]);
1073         if (ret < 0)
1074                 goto fail;
1075         command_fds[0] = fds[1];
1076         command_fds[1] = fds[2];
1077         if (do_select(COMMAND_MODE) >= 0)
1078                 PARA_INFO_LOG("command complete\n");
1079         else
1080                 PARA_NOTICE_LOG("command aborted\n");
1081         print_in_bar(COLOR_MSG, " ");
1082         return;
1083 fail:
1084         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1085         close(command_fds[0]);
1086         close(command_fds[1]);
1087 }
1088
1089 static void para_cmd(char *cmd)
1090 {
1091         char *c;
1092
1093         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1094         c = make_message(BINDIR "/para_client -- %s", cmd);
1095         exec_and_display_cmd(c);
1096         free(c);
1097 }
1098
1099 static void display_cmd(char *cmd)
1100 {
1101         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1102         exec_and_display_cmd(cmd);
1103 }
1104
1105 /*
1106  * shutdown curses and stat pipe before executing external commands
1107  */
1108 static void external_cmd(char *cmd)
1109 {
1110         int fds[3] = {-1, -1, -1};
1111
1112         if (cmd_pid)
1113                 return;
1114         shutdown_curses();
1115         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1116                 return;
1117         do_select(EXTERNAL_MODE);
1118         init_curses();
1119 }
1120
1121 static void print_scroll_msg(void)
1122 {
1123         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1124         int first_rbe = first_visible_rbe(&lines_total);
1125
1126         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1127                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1128 }
1129
1130 static void com_scroll_top(void)
1131 {
1132         int i = RINGBUFFER_SIZE - 1;
1133         unsigned lines = 0;
1134
1135         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1136                 i--;
1137         /* i is oldest entry */
1138         for (; lines < bot.lines && i >= 0; i--) {
1139                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1140                 if (!rbe)
1141                         break;
1142                 lines += NUM_LINES(rbe->len);
1143         }
1144         i++;
1145         if (lines > 0 && scroll_position != i) {
1146                 scroll_position = i;
1147                 redraw_bot_win();
1148                 print_scroll_msg();
1149                 return;
1150         }
1151         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1152 }
1153
1154 static void com_cancel_scrolling(void)
1155 {
1156
1157         if (scroll_position == 0) {
1158                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1159                 return;
1160         }
1161         scroll_position = 0;
1162         redraw_bot_win();
1163 }
1164
1165 static void com_page_down(void)
1166 {
1167         unsigned lines = 0;
1168         int i = scroll_position;
1169
1170         while (lines < bot.lines && --i > 0) {
1171                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1172                 if (!rbe)
1173                         break;
1174                 lines += NUM_LINES(rbe->len);
1175         }
1176         if (lines) {
1177                 scroll_position = i;
1178                 redraw_bot_win();
1179                 print_scroll_msg();
1180                 return;
1181         }
1182         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1183 }
1184
1185 static void com_page_up(void)
1186 {
1187         unsigned lines;
1188         int fvr = first_visible_rbe(&lines);
1189
1190         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1191                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1192                 return;
1193         }
1194         scroll_position = fvr + 1;
1195         for (; scroll_position > 0; scroll_position--) {
1196                 first_visible_rbe(&lines);
1197                 if (lines == bot.lines)
1198                         break;
1199         }
1200         redraw_bot_win();
1201         print_scroll_msg();
1202 }
1203
1204 static void com_scroll_down(void)
1205 {
1206         struct rb_entry *rbe;
1207         int rbe_lines;
1208
1209         if (!scroll_position) {
1210                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1211                 return;
1212         }
1213         scroll_position--;
1214         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1215         rbe_lines = NUM_LINES(rbe->len);
1216         wscrl(bot.win, rbe_lines);
1217         wmove(bot.win, bot.lines - rbe_lines, 0);
1218         wattron(bot.win, COLOR_PAIR(rbe->color));
1219         waddstr(bot.win, rbe->msg);
1220         wrefresh(bot.win);
1221         print_scroll_msg();
1222 }
1223
1224 static void com_scroll_up(void)
1225 {
1226         struct rb_entry *rbe = NULL;
1227         unsigned lines;
1228         int i, first_rbe, num_scroll;
1229
1230         /* the entry that is going to vanish */
1231         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1232         if (!rbe)
1233                 goto err_out;
1234         num_scroll = NUM_LINES(rbe->len);
1235         first_rbe = first_visible_rbe(&lines);
1236         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1237                 goto err_out;
1238         scroll_position++;
1239         wscrl(bot.win, -num_scroll);
1240         i = draw_top_rbe(&lines);
1241         if (i < 0)
1242                 goto err_out;
1243         while (i > 0 && lines < num_scroll) {
1244                 int rbe_lines;
1245                 rbe = ringbuffer_get(bot_win_rb, --i);
1246                 if (!rbe)
1247                         break;
1248                 rbe_lines = NUM_LINES(rbe->len);
1249                 lines += rbe_lines;
1250 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1251                 wattron(bot.win, COLOR_PAIR(rbe->color));
1252                 waddstr(bot.win, "\n");
1253                 waddstr(bot.win, rbe->msg);
1254                 if (!i)
1255                         break;
1256                 i--;
1257         }
1258         wrefresh(bot.win);
1259         print_scroll_msg();
1260         return;
1261 err_out:
1262         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1263 }
1264
1265 static void com_ll_decr(void)
1266 {
1267         if (loglevel <= LL_DEBUG) {
1268                 print_in_bar(COLOR_ERRMSG,
1269                         "loglevel already at maximal verbosity\n");
1270                 return;
1271         }
1272         loglevel--;
1273         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1274 }
1275
1276 static void com_ll_incr(void)
1277 {
1278         if (loglevel >= LL_EMERG) {
1279                 print_in_bar(COLOR_ERRMSG,
1280                         "loglevel already at minimal verbosity\n");
1281                 return;
1282         }
1283         loglevel++;
1284         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1285 }
1286
1287 /*
1288  * reread configuration, terminate on errors
1289  */
1290 static void com_reread_conf(void)
1291 {
1292         char *cf = configfile_exists();
1293         struct gui_cmdline_parser_params params = {
1294                 .override = 1,
1295                 .initialize = 1,
1296                 .check_required = 0,
1297                 .check_ambiguity = 0,
1298                 .print_errors = 0,
1299         };
1300
1301         if (!cf) {
1302                 PARA_WARNING_LOG("there is no configuration to read\n");
1303                 return;
1304         }
1305         PARA_INFO_LOG("rereading command line options and config file\n");
1306         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1307         /*
1308          * Despite .print_errors is set to 0, gengetopt will print to stderr
1309          * anyway, and exit on errors. So we have to shutdown curses first.
1310          */
1311         shutdown_curses();
1312         gui_cmdline_parser_config_file(cf, &conf, &params);
1313         init_curses();
1314         PARA_NOTICE_LOG("config file reloaded\n");
1315         if (check_key_map_args() < 0)
1316                 finish(EXIT_FAILURE);
1317 }
1318
1319 static void com_help(void)
1320 {
1321         int i;
1322
1323         for (i = 0; i < conf.key_map_given; ++i) {
1324                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1325                 const char *handler_text = "???", *desc = NULL;
1326
1327                 if (!split_key_map(tmp, &handler, &arg)) {
1328                         free(tmp);
1329                         return;
1330                 }
1331                 switch (*handler) {
1332                         case 'i':
1333                                 handler_text = "internal";
1334                                 desc = command_list[find_cmd_byname(arg)].description;
1335                                 break;
1336                         case 'x': handler_text = "external"; break;
1337                         case 'd': handler_text = "display "; break;
1338                         case 'p': handler_text = "para    "; break;
1339                 }
1340                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1341                         strlen(arg) < 8? "\t" : "",
1342                         desc? desc : "");
1343                 free(tmp);
1344         }
1345         for (i = 0; command_list[i].handler; i++) {
1346                 struct gui_command gc = command_list[i];
1347
1348                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1349                         strlen(gc.name) < 8? "\t" : "",
1350                         gc.description);
1351         }
1352         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1353                 "for more info");
1354 }
1355
1356 static void com_shrink_top_win(void)
1357 {
1358         if (top.lines <= theme.top_lines_min) {
1359                 PARA_WARNING_LOG("can not decrease top window\n");
1360                 return;
1361         }
1362         init_wins(top.lines - 1);
1363         wclear(top.win);
1364         print_all_items();
1365         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1366 }
1367
1368 static void com_enlarge_top_win(void)
1369 {
1370         if (bot.lines < 3) {
1371                 PARA_WARNING_LOG("can not increase top window\n");
1372                 return;
1373         }
1374         init_wins(top.lines + 1);
1375         wclear(top.win);
1376         print_all_items();
1377         print_in_bar(COLOR_MSG, "increased top window");
1378 }
1379
1380 static void com_version(void)
1381 {
1382         print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1383 }
1384
1385 __noreturn static void com_quit(void)
1386 {
1387         finish(0);
1388 }
1389
1390 static void com_refresh(void)
1391 {
1392         shutdown_curses();
1393         init_curses();
1394 }
1395
1396 static void com_next_theme(void)
1397 {
1398         theme_next(&theme);
1399         com_refresh();
1400 }
1401
1402 static void com_prev_theme(void)
1403 {
1404         theme_prev(&theme);
1405         com_refresh();
1406 }
1407
1408 static void handle_command(int c)
1409 {
1410         int i;
1411
1412         /* first check user-defined 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                         para_cmd(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 __noreturn static void print_help_and_die(void)
1451 {
1452         struct ggo_help h = DEFINE_GGO_HELP(gui);
1453         bool d = conf.detailed_help_given;
1454
1455         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1456         exit(0);
1457 }
1458
1459 int main(int argc, char *argv[])
1460 {
1461         int ret;
1462         char *cf;
1463
1464         _argc = argc;
1465         _argv = argv;
1466
1467         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1468         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1469         version_handle_flag("gui", conf.version_given);
1470         if (conf.help_given || conf.detailed_help_given)
1471                 print_help_and_die();
1472         cf = configfile_exists();
1473         if (!cf && conf.config_file_given) {
1474                 fprintf(stderr, "can not read config file %s\n",
1475                         conf.config_file_arg);
1476                 exit(EXIT_FAILURE);
1477         }
1478         if (cf) {
1479                 struct gui_cmdline_parser_params params = {
1480                         .override = 0,
1481                         .initialize = 0,
1482                         .check_required = 0,
1483                         .check_ambiguity = 0,
1484                         .print_errors = 1,
1485                 };
1486                 gui_cmdline_parser_config_file(cf, &conf, &params);
1487                 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1488         }
1489         if (check_key_map_args() < 0) {
1490                 fprintf(stderr, "invalid key map\n");
1491                 exit(EXIT_FAILURE);
1492         }
1493         theme_init(conf.theme_arg, &theme);
1494         setup_signal_handling();
1495         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1496         setlocale(LC_CTYPE, "");
1497         initscr(); /* needed only once, always successful */
1498         init_curses();
1499         for (;;) {
1500                 print_status_bar();
1501                 ret = do_select(GETCH_MODE);
1502                 if (!ret)
1503                         continue;
1504                 print_in_bar(COLOR_MSG, " ");
1505                 handle_command(ret);
1506         }
1507 }