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