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 static int loglevel;
  55
  56 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  57
  58
  59 /**
  60  * Codes for various colors.
  61  *
  62  * Each status item has its own color pair. The ones defined here start at a
  63  * higher number so that they do not overlap with these.
  64  */
  65 enum gui_color_pair {
  66         COLOR_STATUSBAR = NUM_STAT_ITEMS + 1,
  67         COLOR_COMMAND,
  68         COLOR_OUTPUT,
  69         COLOR_MSG,
  70         COLOR_ERRMSG,
  71         COLOR_SEPARATOR,
  72         COLOR_TOP,
  73         COLOR_BOT,
  74 };
  75
  76 struct gui_command {
  77         const char *key;
  78         const char *name;
  79         const char *description;
  80         void (*handler)(void);
  81 };
  82
  83 static struct gui_theme theme;
  84
  85 static void com_help(void);
  86 static void com_reread_conf(void);
  87 static void com_enlarge_top_win(void);
  88 static void com_shrink_top_win(void);
  89 static void com_version(void);
  90 __noreturn static void com_quit(void);
  91 static void com_refresh(void);
  92 static void com_ll_incr(void);
  93 static void com_ll_decr(void);
  94 static void com_prev_theme(void);
  95 static void com_next_theme(void);
  96 static void com_scroll_up(void);
  97 static void com_scroll_down(void);
  98 static void com_page_up(void);
  99 static void com_page_down(void);
 100 static void com_cancel_scrolling(void);
 101 static void com_scroll_top(void);
 102
 103 static struct gui_command command_list[] = {
 104         {
 105                 .key = "?",
 106                 .name = "help",
 107                 .description = "print help",
 108                 .handler = com_help
 109         }, {
 110                 .key = "+",
 111                 .name = "enlarge_win",
 112                 .description = "enlarge the top window",
 113                 .handler = com_enlarge_top_win
 114         }, {
 115                 .key = "-",
 116                 .name = "shrink_win",
 117                 .description = "shrink the top window",
 118                 .handler = com_shrink_top_win
 119         }, {
 120                 .key = "r",
 121                 .name = "reread_conf",
 122                 .description = "reread configuration file",
 123                 .handler = com_reread_conf
 124         }, {
 125                 .key = "q",
 126                 .name = "quit",
 127                 .description = "exit para_gui",
 128                 .handler = com_quit
 129         }, {
 130                 .key = "^L",
 131                 .name = "refresh",
 132                 .description = "redraw the screen",
 133                 .handler = com_refresh
 134         }, {
 135                 .key = ".",
 136                 .name = "next_theme",
 137                 .description = "switch to next theme",
 138                 .handler = com_next_theme
 139         }, {
 140                 .key = ",",
 141                 .name = "prev_theme",
 142                 .description = "switch to previous stream",
 143                 .handler = com_prev_theme
 144         }, {
 145                 .key = ">",
 146                 .name = "ll_incr",
 147                 .description = "increase loglevel (decreases verbosity)",
 148                 .handler = com_ll_incr
 149         }, {
 150                 .key = "<",
 151                 .name = "ll_decr",
 152                 .description = "decrease loglevel (increases verbosity)",
 153                 .handler = com_ll_decr
 154         }, {
 155                 .key = "V",
 156                 .name = "version",
 157                 .description = "show the para_gui version",
 158                 .handler = com_version
 159         }, {
 160                 .key = "<up>",
 161                 .name = "scroll_up",
 162                 .description = "scroll up one line",
 163                 .handler = com_scroll_up
 164         }, {
 165                 .key = "<down>",
 166                 .name = "scroll_down",
 167                 .description = "scroll down one line",
 168                 .handler = com_scroll_down
 169         }, {
 170                 .key = "<ppage>",
 171                 .name = "page_up",
 172                 .description = "scroll up one page",
 173                 .handler = com_page_up
 174         }, {
 175                 .key = "<npage>",
 176                 .name = "page_down",
 177                 .description = "scroll down one page",
 178                 .handler = com_page_down
 179         }, {
 180                 .key = "<home>",
 181                 .name = "scroll_top",
 182                 .description = "scroll to top of buffer",
 183                 .handler = com_scroll_top
 184         }, {
 185                 .key = "<end>",
 186                 .name = "cancel_scroll",
 187                 .description = "deactivate scroll mode",
 188                 .handler = com_cancel_scrolling
 189         }, {
 190                 .handler = NULL
 191         }
 192 };
 193
 194 static int find_cmd_byname(char *name)
 195 {
 196         int i;
 197
 198         for (i = 0; command_list[i].handler; i++)
 199                 if (!strcmp(command_list[i].name, name))
 200                         return i;
 201         return -1;
 202 }
 203
 204 /*
 205  * Even though ncurses provides getmaxx and getmaxy, these functions/macros are
 206  * not described in the XSI Curses standard.
 207  */
 208 static int get_num_lines(struct gui_window *w)
 209 {
 210         int lines;
 211         __a_unused int cols; /* avoid "set but not used" warnings */
 212
 213         getmaxyx(w->win, lines, cols);
 214         return lines;
 215 }
 216
 217 static int get_num_cols(struct gui_window *w)
 218 {
 219         __a_unused int lines; /* avoid "set but not used" warnings */
 220         int cols;
 221
 222         getmaxyx(w->win, lines, cols);
 223         return cols;
 224 }
 225
 226 /** Number of lines of the window are occupied by an output line. */
 227 #define NUM_LINES(len) (1 + (len) / get_num_cols(&bot))
 228
 229 /* isendwin() returns false before initscr() was called */
 230 static bool curses_active(void)
 231 {
 232         return top.win && !isendwin();
 233 }
 234
 235 /* taken from mutt */
 236 static char *km_keyname(int c)
 237 {
 238         static char buf[10];
 239
 240         if (c == KEY_UP) {
 241                 sprintf(buf, "<up>");
 242                 return buf;
 243         }
 244         if (c == KEY_DOWN) {
 245                 sprintf(buf, "<down>");
 246                 return buf;
 247         }
 248         if (c == KEY_LEFT) {
 249                 sprintf(buf, "<left>");
 250                 return buf;
 251         }
 252         if (c == KEY_RIGHT) {
 253                 sprintf(buf, "<right>");
 254                 return buf;
 255         }
 256         if (c == KEY_NPAGE) {
 257                 sprintf(buf, "<npage>");
 258                 return buf;
 259         }
 260         if (c == KEY_PPAGE) {
 261                 sprintf(buf, "<ppage>");
 262                 return buf;
 263         }
 264         if (c == KEY_HOME) {
 265                 sprintf(buf, "<home>");
 266                 return buf;
 267         }
 268         if (c == KEY_END) {
 269                 sprintf(buf, "<end>");
 270                 return buf;
 271         }
 272         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 273                 if (c < 0)
 274                         c += 256;
 275                 if (c < 128) {
 276                         buf[0] = '^';
 277                         buf[1] = (c + '@') & 0x7f;
 278                         buf[2] = 0;
 279                 } else
 280                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 281                                 (c >> 3) & 7, c & 7);
 282         } else if (c >= KEY_F0 && c < KEY_F(256))
 283                 sprintf(buf, "<F%d>", c - KEY_F0);
 284         else if (isprint(c))
 285                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 286         else
 287                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 288         return buf;
 289 }
 290
 291 /* Print given number of spaces to curses window. */
 292 static void add_spaces(WINDOW* win, unsigned int num)
 293 {
 294         char space[] = "                                ";
 295         unsigned sz = sizeof(space) - 1; /* number of spaces */
 296
 297         while (num >= sz)  {
 298                 waddstr(win, space);
 299                 num -= sz;
 300         }
 301         if (num > 0) {
 302                 assert(num < sz);
 303                 space[num] = '\0';
 304                 waddstr(win, space);
 305         }
 306 }
 307
 308 /*
 309  * print aligned string to curses window. This function always prints
 310  * exactly len chars.
 311  */
 312 static int align_str(WINDOW* win, char *str, unsigned int len,
 313                 unsigned int align)
 314 {
 315         int ret, i, num; /* of spaces */
 316         size_t width;
 317
 318         if (!win || !str)
 319                 return 0;
 320         ret = strwidth(str, &width);
 321         if (ret < 0) {
 322                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 323                 width = 0;
 324                 str[0] = '\0';
 325         }
 326         num = len - width;
 327         if (num < 0) {
 328                 str[len] = '\0';
 329                 num = 0;
 330         }
 331         /* replace control characters by spaces */
 332         for (i = 0; i < len && str[i]; i++) {
 333                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 334                         str[i] = ' ';
 335         }
 336         if (align == LEFT) {
 337                 waddstr(win, str);
 338                 add_spaces(win, num);
 339         } else if (align == RIGHT) {
 340                 add_spaces(win, num);
 341                 waddstr(win, str);
 342         } else {
 343                 add_spaces(win, num / 2);
 344                 waddstr(win, str[0]? str: "");
 345                 add_spaces(win, num - num / 2);
 346         }
 347         return 1;
 348 }
 349
 350 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 351 {
 352         char *msg;
 353         va_list ap;
 354
 355         if (!curses_active())
 356                 return;
 357         wattron(in.win, COLOR_PAIR(color));
 358         va_start(ap, fmt);
 359         xvasprintf(&msg, fmt, ap);
 360         va_end(ap);
 361         wmove(in.win, 0, 0);
 362         align_str(in.win, msg, get_num_cols(&in), LEFT);
 363         free(msg);
 364         wrefresh(in.win);
 365 }
 366
 367 static void print_status_bar(void)
 368 {
 369         char *tmp;
 370
 371         tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
 372         wmove(sb.win, 0, 0);
 373         align_str(sb.win, tmp, get_num_cols(&sb), CENTER);
 374         free(tmp);
 375 }
 376
 377 /*
 378  * get the number of the oldest rbe that is (partially) visible. On return,
 379  * lines contains the sum of the number of lines of all visible entries. If the
 380  * first one is only partially visible, lines is greater than bot.lines.
 381  */
 382 static int first_visible_rbe(unsigned *lines)
 383 {
 384         int i, bot_lines = get_num_lines(&bot);
 385
 386         *lines = 0;
 387         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 388                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 389                 int rbe_lines;
 390                 if (!rbe)
 391                         return i - 1;
 392                 rbe_lines = NUM_LINES(rbe->len);
 393                 if (rbe_lines > bot_lines)
 394                         return -1;
 395                 *lines += rbe_lines;
 396                 if (*lines >= bot_lines)
 397                         return i;
 398         }
 399         return RINGBUFFER_SIZE - 1;
 400 }
 401
 402 /*
 403 returns number of first visible rbe, *lines is the number of lines drawn.
 404  */
 405 static int draw_top_rbe(unsigned *lines)
 406 {
 407         int bot_cols, bot_lines, ret, fvr = first_visible_rbe(lines);
 408         struct rb_entry *rbe;
 409         size_t bytes_to_skip, cells_to_skip, width;
 410
 411         if (fvr < 0)
 412                 return -1;
 413         wmove(bot.win, 0, 0);
 414         rbe = ringbuffer_get(bot_win_rb, fvr);
 415         if (!rbe)
 416                 return -1;
 417         getmaxyx(bot.win, bot_lines, bot_cols);
 418         if (*lines > bot_lines) {
 419                 /* rbe is partially visible multi-line */
 420                 cells_to_skip = (*lines - bot_lines) * bot_cols;
 421                 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
 422                 if (ret < 0)
 423                         return ret;
 424                 ret = strwidth(rbe->msg + bytes_to_skip, &width);
 425                 if (ret < 0)
 426                         return ret;
 427         } else {
 428                 bytes_to_skip = 0;
 429                 width = rbe->len;
 430         }
 431         wattron(bot.win, COLOR_PAIR(rbe->color));
 432         waddstr(bot.win, rbe->msg + bytes_to_skip);
 433         *lines = NUM_LINES(width);
 434         return fvr;
 435 }
 436
 437 static void redraw_bot_win(void)
 438 {
 439         unsigned lines;
 440         int i, bot_lines = get_num_lines(&bot);
 441
 442         wmove(bot.win, 0, 0);
 443         wclear(bot.win);
 444         i = draw_top_rbe(&lines);
 445         if (i <= 0)
 446                 goto out;
 447         while (i > 0 && lines < bot_lines) {
 448                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 449                 if (!rbe) {
 450                         lines++;
 451                         waddstr(bot.win, "\n");
 452                         continue;
 453                 }
 454                 lines += NUM_LINES(rbe->len);
 455                 wattron(bot.win, COLOR_PAIR(rbe->color));
 456                 waddstr(bot.win, "\n");
 457                 waddstr(bot.win, rbe->msg);
 458         }
 459 out:
 460         wrefresh(bot.win);
 461 }
 462
 463 static void rb_add_entry(int color, char *msg)
 464 {
 465         struct rb_entry *old, *new;
 466         int x, y;
 467         size_t len;
 468
 469         if (strwidth(msg, &len) < 0)
 470                 return;
 471         new = para_malloc(sizeof(struct rb_entry));
 472         new->color = color;
 473         new->len = len;
 474         new->msg = msg;
 475         old = ringbuffer_add(bot_win_rb, new);
 476         if (old) {
 477                 free(old->msg);
 478                 free(old);
 479         }
 480         if (scroll_position) {
 481                 /* discard current scrolling, like xterm does */
 482                 scroll_position = 0;
 483                 redraw_bot_win();
 484                 return;
 485         }
 486         wattron(bot.win, COLOR_PAIR(color));
 487         getyx(bot.win, y, x);
 488         if (y || x)
 489                 waddstr(bot.win, "\n");
 490         waddstr(bot.win, msg);
 491 }
 492
 493 /*
 494  * print formated output to bot win and refresh
 495  */
 496 __printf_2_3 static void outputf(int color, const char* fmt,...)
 497 {
 498         char *msg;
 499         va_list ap;
 500
 501         if (!curses_active())
 502                 return;
 503         va_start(ap, fmt);
 504         xvasprintf(&msg, fmt, ap);
 505         va_end(ap);
 506         rb_add_entry(color, msg);
 507         wrefresh(bot.win);
 508 }
 509
 510 static int add_output_line(char *line, void *data)
 511 {
 512         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 513
 514         if (!curses_active())
 515                 return 1;
 516         rb_add_entry(color, para_strdup(line));
 517         return 1;
 518 }
 519
 520 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
 521 {
 522         va_list ap;
 523
 524         if (ll < loglevel)
 525                 return;
 526         va_start(ap, fmt);
 527         if (curses_active()) {
 528                 int color = ll <= LL_NOTICE? COLOR_MSG : COLOR_ERRMSG;
 529                 char *msg;
 530                 unsigned bytes = xvasprintf(&msg, fmt, ap);
 531                 if (bytes > 0 && msg[bytes - 1] == '\n')
 532                         msg[bytes - 1] = '\0'; /* cut trailing newline */
 533                 rb_add_entry(color, msg);
 534                 wrefresh(bot.win);
 535         } else if (cmd_pid <= 0) /* no external command running */
 536                 vfprintf(stderr, fmt, ap);
 537         va_end(ap);
 538 }
 539 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 540
 541 static void setup_signal_handling(void)
 542 {
 543         signal_pipe = para_signal_init();
 544         para_install_sighandler(SIGINT);
 545         para_install_sighandler(SIGTERM);
 546         para_install_sighandler(SIGCHLD);
 547         para_install_sighandler(SIGWINCH);
 548         para_install_sighandler(SIGUSR1);
 549 }
 550
 551 static void shutdown_curses(void)
 552 {
 553         def_prog_mode();
 554         endwin();
 555 }
 556
 557 /* disable curses, print a message, kill running processes and exit */
 558 __noreturn __printf_2_3 static void die(int exit_code, const char* fmt, ...)
 559 {
 560         va_list argp;
 561
 562         shutdown_curses();
 563         va_start(argp, fmt);
 564         vfprintf(stderr, fmt, argp);
 565         va_end(argp);
 566         /* kill every process in the process group and exit */
 567         para_sigaction(SIGTERM, SIG_IGN);
 568         kill(0, SIGTERM);
 569         exit(exit_code);
 570 }
 571
 572 /*
 573  * Print stat item #i to curses window
 574  */
 575 static void print_stat_item(int i)
 576 {
 577         char *tmp;
 578         struct stat_item_data d = theme.data[i];
 579         char *c = stat_content[i];
 580         int top_lines = get_num_lines(&top);
 581
 582         if (!curses_active() || !d.len || !c)
 583                 return;
 584         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 585         wmove(top.win, d.y * top_lines / 100, d.x * COLS / 100);
 586         wrefresh(top.win);
 587         wattron(top.win, COLOR_PAIR(i + 1));
 588         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 589         free(tmp);
 590         wrefresh(top.win);
 591 }
 592
 593 static int update_item(int item_num, char *buf)
 594 {
 595         char **c = stat_content + item_num;
 596
 597         free(*c);
 598         if (buf && buf[0])
 599                 goto dup;
 600         switch (item_num) {
 601         case SI_ARTIST:
 602                 *c = para_strdup("(artist tag not set)");
 603                 goto print;
 604         case SI_TITLE:
 605                 *c = para_strdup("(title tag not set)");
 606                 goto print;
 607         case SI_YEAR:
 608                 *c = para_strdup("????");
 609                 goto print;
 610         case SI_ALBUM:
 611                 *c = para_strdup("(album tag not set)");
 612                 goto print;
 613         case SI_COMMENT:
 614                 *c = para_strdup("(comment tag not set)");
 615                 goto print;
 616         }
 617 dup:
 618         *c = para_strdup(buf);
 619 print:
 620         print_stat_item(item_num);
 621         return 1;
 622 }
 623
 624 static void print_all_items(void)
 625 {
 626         int i;
 627
 628         if (!curses_active())
 629                 return;
 630         FOR_EACH_STATUS_ITEM(i)
 631                 print_stat_item(i);
 632 }
 633
 634 static void clear_all_items(void)
 635 {
 636         int i;
 637
 638         FOR_EACH_STATUS_ITEM(i) {
 639                 free(stat_content[i]);
 640                 stat_content[i] = para_strdup("");
 641         }
 642 }
 643
 644 static void status_post_select(fd_set *rfds)
 645 {
 646         static char *buf;
 647         static int bufsize, loaded;
 648         int ret, ret2;
 649         size_t sz;
 650
 651         if (stat_pipe < 0)
 652                 return;
 653         if (loaded >= bufsize) {
 654                 if (bufsize > 1000 * 1000) {
 655                         loaded = 0;
 656                         return;
 657                 }
 658                 bufsize += bufsize + 1000;
 659                 buf = para_realloc(buf, bufsize);
 660         }
 661         assert(loaded < bufsize);
 662         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 663                 rfds, &sz);
 664         loaded += sz;
 665         ret2 = for_each_stat_item(buf, loaded, update_item);
 666         if (ret < 0 || ret2 < 0) {
 667                 loaded = 0;
 668                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
 669                 close(stat_pipe);
 670                 stat_pipe = -1;
 671                 clear_all_items();
 672                 free(stat_content[SI_BASENAME]);
 673                 stat_content[SI_BASENAME] =
 674                         para_strdup("stat command terminated!?");
 675                 print_all_items();
 676                 return;
 677         }
 678         sz = ret2; /* what is left */
 679         if (sz > 0 && sz < loaded)
 680                 memmove(buf, buf + loaded - sz, sz);
 681         loaded = sz;
 682 }
 683
 684 /*
 685  * init all windows
 686  */
 687 static void init_wins(int top_lines)
 688 {
 689         int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
 690                 in_y = LINES - 1, sep_y = top_lines;
 691         int bot_lines = LINES - top_lines - 3, sb_lines = 1, in_lines = 1,
 692                 sep_lines = 1;
 693
 694         assume_default_colors(theme.default_fg, theme.default_bg);
 695         if (top.win) {
 696                 wresize(top.win, top_lines, COLS);
 697                 mvwin(top.win, top_y, 0);
 698
 699                 wresize(sb.win, sb_lines, COLS);
 700                 mvwin(sb.win, sb_y, 0);
 701
 702                 wresize(sep.win, sep_lines, COLS);
 703                 mvwin(sep.win, sep_y, 0);
 704
 705                 wresize(bot.win, bot_lines, COLS);
 706                 mvwin(bot.win, bot_y, 0);
 707
 708                 wresize(in.win, in_lines, COLS);
 709                 mvwin(in.win, in_y, 0);
 710         } else {
 711                 sep.win = newwin(sep_lines, COLS, sep_y, 0);
 712                 top.win = newwin(top_lines, COLS, top_y, 0);
 713                 bot.win = newwin(bot_lines, COLS, bot_y, 0);
 714                 sb.win = newwin(sb_lines, COLS, sb_y, 0);
 715                 in.win = newwin(in_lines, COLS, in_y, 0);
 716                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 717                         die(EXIT_FAILURE, "Error: Cannot create curses windows\n");
 718                 wclear(bot.win);
 719                 wclear(sb.win);
 720                 wclear(in.win);
 721                 scrollok(bot.win, 1);
 722                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 723                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 724                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 725                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 726                 nodelay(top.win, 1);
 727                 nodelay(bot.win, 1);
 728                 nodelay(sb.win, 1);
 729                 nodelay(in.win, 0);
 730
 731                 keypad(top.win, 1);
 732                 keypad(bot.win, 1);
 733                 keypad(sb.win, 1);
 734                 keypad(in.win, 1);
 735         }
 736         wmove(sep.win, 0, 0);
 737         whline(sep.win, theme.sep_char, COLS);
 738         wclear(top.win);
 739         print_all_items();
 740         //wclear(bot.win);
 741         wnoutrefresh(top.win);
 742         wnoutrefresh(bot.win);
 743         print_status_bar();
 744         wnoutrefresh(sb.win);
 745         wnoutrefresh(in.win);
 746         wnoutrefresh(sep.win);
 747         doupdate();
 748 }
 749
 750 static void init_pair_or_die(short pair, short f, short b)
 751 {
 752         if (init_pair(pair, f, b) == ERR)
 753                 die(EXIT_FAILURE, "fatal: init_pair() failed\n");
 754 }
 755
 756 static void init_colors_or_die(void)
 757 {
 758         int i;
 759
 760         if (!has_colors())
 761                 die(EXIT_FAILURE, "fatal: No color term\n");
 762         if (start_color() == ERR)
 763                 die(EXIT_FAILURE, "fatal: failed to start colors\n");
 764         FOR_EACH_STATUS_ITEM(i)
 765                 if (theme.data[i].len)
 766                         init_pair_or_die(i + 1, theme.data[i].fg,
 767                                 theme.data[i].bg);
 768         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 769         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 770         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 771         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 772         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 773         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 774         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 775         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 776 }
 777
 778 /* (Re-)initialize the curses library. */
 779 static void init_curses(void)
 780 {
 781         if (curses_active())
 782                 return;
 783         if (top.win && refresh() == ERR) /* refresh is really needed */
 784                 die(EXIT_FAILURE, "refresh() failed\n");
 785         if (LINES < theme.lines_min || COLS < theme.cols_min)
 786                 die(EXIT_FAILURE, "Terminal (%dx%d) too small"
 787                         " (need at least %dx%d)\n", COLS, LINES,
 788                         theme.cols_min, theme.lines_min);
 789         curs_set(0); /* make cursor invisible, ignore errors */
 790         nonl(); /* do not NL->CR/NL on output, always returns OK */
 791         /* don't echo input */
 792         if (noecho() == ERR)
 793                 die(EXIT_FAILURE, "fatal: noecho() failed\n");
 794         /* take input chars one at a time, no wait for \n */
 795         if (cbreak() == ERR)
 796                 die(EXIT_FAILURE, "fatal: cbreak() failed\n");
 797         init_colors_or_die();
 798         clear(); /* ignore non-fatal errors */
 799         init_wins(theme.top_lines_default);
 800         // noecho(); /* don't echo input */
 801 }
 802
 803 static void check_sigchld(void)
 804 {
 805         int ret;
 806         pid_t pid;
 807
 808 reap_next_child:
 809         ret = para_reap_child(&pid);
 810         if (ret <= 0)
 811                 return;
 812         if (pid == cmd_pid)
 813                 cmd_pid = 0;
 814         goto reap_next_child;
 815 }
 816
 817 /*
 818  * This sucker modifies its first argument. *handler and *arg are
 819  * pointers to 0-terminated strings (inside line). Crap.
 820  */
 821 static int split_key_map(char *line, char **handler, char **arg)
 822 {
 823         if (!(*handler = strchr(line + 1, ':')))
 824                 goto err_out;
 825         **handler = '\0';
 826         (*handler)++;
 827         if (!(*arg = strchr(*handler, ':')))
 828                 goto err_out;
 829         **arg = '\0';
 830         (*arg)++;
 831         return 1;
 832 err_out:
 833         return 0;
 834 }
 835
 836 static void check_key_map_args_or_die(void)
 837 {
 838         int i;
 839         char *tmp = NULL;
 840
 841         for (i = 0; i < conf.key_map_given; ++i) {
 842                 char *handler, *arg;
 843
 844                 free(tmp);
 845                 tmp = para_strdup(conf.key_map_arg[i]);
 846                 if (!split_key_map(tmp, &handler, &arg))
 847                         break;
 848                 if (strlen(handler) != 1)
 849                         break;
 850                 if (*handler != 'x' && *handler != 'd' && *handler != 'i'
 851                                 && *handler != 'p')
 852                         break;
 853                 if (*handler != 'i')
 854                         continue;
 855                 if (find_cmd_byname(arg) < 0)
 856                         break;
 857         }
 858         if (i != conf.key_map_given)
 859                 die(EXIT_FAILURE, "invalid key map: %s\n", conf.key_map_arg[i]);
 860         free(tmp);
 861 }
 862
 863 static void parse_config_file_or_die(bool override)
 864 {
 865         bool err;
 866         char *config_file;
 867         struct gui_cmdline_parser_params params = {
 868                 .override = override,
 869                 .initialize = 0,
 870                 .check_required = !override,
 871                 .check_ambiguity = 0,
 872                 .print_errors = 1,
 873         };
 874
 875         if (conf.config_file_given)
 876                 config_file = para_strdup(conf.config_file_arg);
 877         else {
 878                 char *home = para_homedir();
 879                 config_file = make_message("%s/.paraslash/gui.conf", home);
 880                 free(home);
 881         }
 882         if (!file_exists(config_file)) {
 883                 if (!conf.config_file_given)
 884                         err = false;
 885                 else {
 886                         PARA_EMERG_LOG("config file %s does not exist\n",
 887                                 config_file);
 888                         err = true;
 889                 }
 890                 goto out;
 891         }
 892         gui_cmdline_parser_config_file(config_file, &conf, &params);
 893         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 894         check_key_map_args_or_die();
 895         theme_init(conf.theme_arg, &theme);
 896         err = false;
 897 out:
 898         free(config_file);
 899         if (err)
 900                 exit(EXIT_FAILURE);
 901 }
 902
 903 /* reread configuration, terminate on errors */
 904 static void reread_conf(void)
 905 {
 906         /*
 907          * gengetopt might print to stderr and exit on errors. So we have to
 908          * shutdown curses first.
 909          */
 910         shutdown_curses();
 911         parse_config_file_or_die(true /* override */);
 912         init_curses();
 913         print_in_bar(COLOR_MSG, "config file reloaded\n");
 914 }
 915
 916 /*
 917  * React to various signal-related events
 918  */
 919 static void handle_signal(int sig)
 920 {
 921         switch (sig) {
 922         case SIGTERM:
 923                 die(EXIT_FAILURE, "only the good die young (caught SIGTERM)\n");
 924                 return;
 925         case SIGWINCH:
 926                 if (curses_active()) {
 927                         shutdown_curses();
 928                         init_curses();
 929                         redraw_bot_win();
 930                 }
 931                 return;
 932         case SIGINT:
 933                 PARA_WARNING_LOG("caught SIGINT, reset\n");
 934                 /* Nothing to do. SIGINT killed our child which gets noticed
 935                  * by do_select and resets everything.
 936                  */
 937                 return;
 938         case SIGUSR1:
 939                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
 940                 reread_conf();
 941                 return;
 942         case SIGCHLD:
 943                 check_sigchld();
 944                 return;
 945         }
 946 }
 947
 948 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
 949 {
 950         static struct timeval next_exec, atm, diff;
 951         int ret, fds[3] = {0, 1, 0};
 952         pid_t pid;
 953
 954         if (stat_pipe >= 0)
 955                 goto success;
 956         /* Avoid busy loop */
 957         gettimeofday(&atm, NULL);
 958         if (tv_diff(&next_exec, &atm, &diff) > 0) {
 959                 if (tv_diff(&diff, tv, NULL) < 0)
 960                         *tv = diff;
 961                 return;
 962         }
 963         next_exec.tv_sec = atm.tv_sec + 2;
 964         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 965         if (ret < 0)
 966                 return;
 967         ret = mark_fd_nonblocking(fds[1]);
 968         if (ret < 0) {
 969                 close(fds[1]);
 970                 return;
 971         }
 972         stat_pipe = fds[1];
 973 success:
 974         para_fd_set(stat_pipe, rfds, max_fileno);
 975 }
 976
 977 #define COMMAND_BUF_SIZE 32768
 978
 979 /*
 980  * This is the core select loop. Besides the (internal) signal
 981  * pipe, the following other fds are checked according to the mode:
 982  *
 983  * GETCH_MODE: check stdin, return when key is pressed
 984  *
 985  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 986  * stdout and stderr or when any key is pressed.
 987  *
 988  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 989  * is running. During that time curses is disabled.  Returns when
 990  * cmd_pid == 0.
 991  */
 992 static int do_select(int mode)
 993 {
 994         fd_set rfds;
 995         int ret, i, max_fileno;
 996         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 997         int cbo[2] = {0, 0}; /* command buf offsets */
 998         struct timeval tv;
 999         unsigned flags[2] = {0, 0}; /* for for_each_line() */
1000
1001 repeat:
1002         tv.tv_sec = conf.timeout_arg  / 1000;
1003         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
1004 //      ret = refresh_status();
1005         FD_ZERO(&rfds);
1006         max_fileno = 0;
1007         status_pre_select(&rfds, &max_fileno, &tv);
1008         /* signal pipe */
1009         para_fd_set(signal_pipe, &rfds, &max_fileno);
1010         /* command pipe only for COMMAND_MODE */
1011         if (mode == COMMAND_MODE) {
1012                 if (command_fds[0] >= 0)
1013                         para_fd_set(command_fds[0], &rfds, &max_fileno);
1014                 if (command_fds[1] >= 0)
1015                         para_fd_set(command_fds[1], &rfds, &max_fileno);
1016         }
1017         if (mode == GETCH_MODE || mode == COMMAND_MODE)
1018                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
1019         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
1020         if (ret <= 0)
1021                 goto check_return; /* skip fd checks */
1022         /* signals */
1023         ret = para_next_signal(&rfds);
1024         if (ret > 0)
1025                 handle_signal(ret);
1026         /* read command pipe if ready */
1027         if (mode == COMMAND_MODE) {
1028                 for (i = 0; i < 2; i++) {
1029                         size_t sz;
1030                         if (command_fds[i] < 0)
1031                                 continue;
1032                         ret = read_nonblock(command_fds[i],
1033                                 command_buf[i] + cbo[i],
1034                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1035                         cbo[i] += sz;
1036                         sz = cbo[i];
1037                         cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1038                                 add_output_line, &i);
1039                         if (sz != cbo[i]) { /* at least one line found */
1040                                 wrefresh(bot.win);
1041                                 flags[i] = 0;
1042                         }
1043                         if (ret < 0) {
1044                                 PARA_NOTICE_LOG("closing command fd %d: %s\n",
1045                                         i, para_strerror(-ret));
1046                                 close(command_fds[i]);
1047                                 command_fds[i] = -1;
1048                                 flags[i] = 0;
1049                                 cbo[i] = 0;
1050                                 if (command_fds[!i] < 0) /* both fds closed */
1051                                         return 0;
1052                         }
1053                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1054                                 PARA_NOTICE_LOG("discarding overlong line\n");
1055                                 cbo[i] = 0;
1056                                 flags[i] = FELF_DISCARD_FIRST;
1057                         }
1058                 }
1059         }
1060         status_post_select(&rfds);
1061 check_return:
1062         switch (mode) {
1063         case COMMAND_MODE:
1064                 ret = wgetch(top.win);
1065                 if (ret != ERR && ret != KEY_RESIZE) {
1066                         if (cmd_pid)
1067                                 kill(cmd_pid, SIGTERM);
1068                         return -1;
1069                 }
1070                 break;
1071         case GETCH_MODE:
1072                 ret = wgetch(top.win);
1073                 if (ret != ERR && ret != KEY_RESIZE)
1074                         return ret;
1075                 break;
1076         case EXTERNAL_MODE:
1077                 if (cmd_pid == 0)
1078                         return 0;
1079         }
1080         goto repeat;
1081 }
1082
1083 /* read from command pipe and print data to bot window */
1084 static void exec_and_display_cmd(const char *cmd)
1085 {
1086         int ret, fds[3] = {0, 1, 1};
1087
1088         outputf(COLOR_COMMAND, "%s", cmd);
1089         ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1090         if (ret < 0)
1091                 return;
1092         ret = mark_fd_nonblocking(fds[1]);
1093         if (ret < 0)
1094                 goto fail;
1095         ret = mark_fd_nonblocking(fds[2]);
1096         if (ret < 0)
1097                 goto fail;
1098         command_fds[0] = fds[1];
1099         command_fds[1] = fds[2];
1100         if (do_select(COMMAND_MODE) >= 0)
1101                 PARA_INFO_LOG("command complete\n");
1102         else
1103                 PARA_NOTICE_LOG("command aborted\n");
1104         print_in_bar(COLOR_MSG, " ");
1105         return;
1106 fail:
1107         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1108         close(command_fds[0]);
1109         close(command_fds[1]);
1110 }
1111
1112 static void para_cmd(char *cmd)
1113 {
1114         char *c;
1115
1116         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1117         c = make_message(BINDIR "/para_client -- %s", cmd);
1118         exec_and_display_cmd(c);
1119         free(c);
1120 }
1121
1122 static void display_cmd(char *cmd)
1123 {
1124         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1125         exec_and_display_cmd(cmd);
1126 }
1127
1128 /*
1129  * shutdown curses and stat pipe before executing external commands
1130  */
1131 static void external_cmd(char *cmd)
1132 {
1133         int fds[3] = {-1, -1, -1};
1134
1135         if (cmd_pid)
1136                 return;
1137         shutdown_curses();
1138         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1139                 return;
1140         do_select(EXTERNAL_MODE);
1141         init_curses();
1142 }
1143
1144 static void print_scroll_msg(void)
1145 {
1146         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1147         int first_rbe = first_visible_rbe(&lines_total);
1148
1149         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1150                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1151 }
1152
1153 static void com_scroll_top(void)
1154 {
1155         int i = RINGBUFFER_SIZE - 1, bot_lines = get_num_lines(&bot);
1156         unsigned lines = 0;
1157
1158         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1159                 i--;
1160         /* i is oldest entry */
1161         for (; lines < bot_lines && i >= 0; i--) {
1162                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1163                 if (!rbe)
1164                         break;
1165                 lines += NUM_LINES(rbe->len);
1166         }
1167         i++;
1168         if (lines > 0 && scroll_position != i) {
1169                 scroll_position = i;
1170                 redraw_bot_win();
1171                 print_scroll_msg();
1172                 return;
1173         }
1174         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1175 }
1176
1177 static void com_cancel_scrolling(void)
1178 {
1179
1180         if (scroll_position == 0) {
1181                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1182                 return;
1183         }
1184         scroll_position = 0;
1185         redraw_bot_win();
1186 }
1187
1188 static void com_page_down(void)
1189 {
1190         unsigned lines = 0;
1191         int i = scroll_position, bot_lines = get_num_lines(&bot);
1192
1193         while (lines < bot_lines && --i > 0) {
1194                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1195                 if (!rbe)
1196                         break;
1197                 lines += NUM_LINES(rbe->len);
1198         }
1199         if (lines) {
1200                 scroll_position = i;
1201                 redraw_bot_win();
1202                 print_scroll_msg();
1203                 return;
1204         }
1205         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1206 }
1207
1208 static void com_page_up(void)
1209 {
1210         unsigned lines;
1211         int fvr = first_visible_rbe(&lines), bot_lines = get_num_lines(&bot);
1212
1213         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1214                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1215                 return;
1216         }
1217         scroll_position = fvr + 1;
1218         for (; scroll_position > 0; scroll_position--) {
1219                 first_visible_rbe(&lines);
1220                 if (lines == bot_lines)
1221                         break;
1222         }
1223         redraw_bot_win();
1224         print_scroll_msg();
1225 }
1226
1227 static void com_scroll_down(void)
1228 {
1229         struct rb_entry *rbe;
1230         int rbe_lines, bot_lines = get_num_lines(&bot);
1231
1232         if (!scroll_position) {
1233                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1234                 return;
1235         }
1236         scroll_position--;
1237         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1238         rbe_lines = NUM_LINES(rbe->len);
1239         wscrl(bot.win, rbe_lines);
1240         wmove(bot.win, bot_lines - rbe_lines, 0);
1241         wattron(bot.win, COLOR_PAIR(rbe->color));
1242         waddstr(bot.win, rbe->msg);
1243         wrefresh(bot.win);
1244         print_scroll_msg();
1245 }
1246
1247 static void com_scroll_up(void)
1248 {
1249         struct rb_entry *rbe = NULL;
1250         unsigned lines;
1251         int i, first_rbe, num_scroll;
1252
1253         /* the entry that is going to vanish */
1254         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1255         if (!rbe)
1256                 goto err_out;
1257         num_scroll = NUM_LINES(rbe->len);
1258         first_rbe = first_visible_rbe(&lines);
1259         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1260                 goto err_out;
1261         scroll_position++;
1262         wscrl(bot.win, -num_scroll);
1263         i = draw_top_rbe(&lines);
1264         if (i < 0)
1265                 goto err_out;
1266         while (i > 0 && lines < num_scroll) {
1267                 int rbe_lines;
1268                 rbe = ringbuffer_get(bot_win_rb, --i);
1269                 if (!rbe)
1270                         break;
1271                 rbe_lines = NUM_LINES(rbe->len);
1272                 lines += rbe_lines;
1273                 wattron(bot.win, COLOR_PAIR(rbe->color));
1274                 waddstr(bot.win, "\n");
1275                 waddstr(bot.win, rbe->msg);
1276                 if (!i)
1277                         break;
1278                 i--;
1279         }
1280         wrefresh(bot.win);
1281         print_scroll_msg();
1282         return;
1283 err_out:
1284         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1285 }
1286
1287 static void com_ll_decr(void)
1288 {
1289         if (loglevel <= LL_DEBUG) {
1290                 print_in_bar(COLOR_ERRMSG,
1291                         "loglevel already at maximal verbosity\n");
1292                 return;
1293         }
1294         loglevel--;
1295         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1296 }
1297
1298 static void com_ll_incr(void)
1299 {
1300         if (loglevel >= LL_EMERG) {
1301                 print_in_bar(COLOR_ERRMSG,
1302                         "loglevel already at minimal verbosity\n");
1303                 return;
1304         }
1305         loglevel++;
1306         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1307 }
1308
1309 static void com_reread_conf(void)
1310 {
1311         reread_conf();
1312 }
1313
1314 static void com_help(void)
1315 {
1316         int i;
1317
1318         for (i = 0; i < conf.key_map_given; ++i) {
1319                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1320                 const char *handler_text = "???", *desc = NULL;
1321
1322                 if (!split_key_map(tmp, &handler, &arg)) {
1323                         free(tmp);
1324                         return;
1325                 }
1326                 switch (*handler) {
1327                         case 'i':
1328                                 handler_text = "internal";
1329                                 desc = command_list[find_cmd_byname(arg)].description;
1330                                 break;
1331                         case 'x': handler_text = "external"; break;
1332                         case 'd': handler_text = "display "; break;
1333                         case 'p': handler_text = "para    "; break;
1334                 }
1335                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1336                         strlen(arg) < 8? "\t" : "",
1337                         desc? desc : "");
1338                 free(tmp);
1339         }
1340         for (i = 0; command_list[i].handler; i++) {
1341                 struct gui_command gc = command_list[i];
1342
1343                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1344                         strlen(gc.name) < 8? "\t" : "",
1345                         gc.description);
1346         }
1347         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1348                 "for more info");
1349 }
1350
1351 static void com_shrink_top_win(void)
1352 {
1353         int top_lines = get_num_lines(&top);
1354
1355         if (top_lines <= theme.top_lines_min) {
1356                 PARA_WARNING_LOG("can not decrease top window\n");
1357                 return;
1358         }
1359         init_wins(top_lines - 1);
1360         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1361 }
1362
1363 static void com_enlarge_top_win(void)
1364 {
1365         int top_lines = get_num_lines(&top), bot_lines = get_num_lines(&bot);
1366
1367         if (bot_lines < 3) {
1368                 PARA_WARNING_LOG("can not increase top window\n");
1369                 return;
1370         }
1371         init_wins(top_lines + 1);
1372         print_in_bar(COLOR_MSG, "increased top window");
1373 }
1374
1375 static void com_version(void)
1376 {
1377         print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1378 }
1379
1380 __noreturn static void com_quit(void)
1381 {
1382         die(EXIT_SUCCESS, "%s", "");
1383 }
1384
1385 static void com_refresh(void)
1386 {
1387         shutdown_curses();
1388         init_curses();
1389 }
1390
1391 static void com_next_theme(void)
1392 {
1393         theme_next(&theme);
1394         com_refresh();
1395 }
1396
1397 static void com_prev_theme(void)
1398 {
1399         theme_prev(&theme);
1400         com_refresh();
1401 }
1402
1403 static void handle_command(int c)
1404 {
1405         int i;
1406
1407         /* first check user-defined key bindings */
1408         for (i = 0; i < conf.key_map_given; ++i) {
1409                 char *tmp, *handler, *arg;
1410
1411                 tmp = para_strdup(conf.key_map_arg[i]);
1412                 if (!split_key_map(tmp, &handler, &arg)) {
1413                         free(tmp);
1414                         return;
1415                 }
1416                 if (strcmp(tmp, km_keyname(c))) {
1417                         free(tmp);
1418                         continue;
1419                 }
1420                 if (*handler == 'd')
1421                         display_cmd(arg);
1422                 else if (*handler == 'x')
1423                         external_cmd(arg);
1424                 else if (*handler == 'p')
1425                         para_cmd(arg);
1426                 else if (*handler == 'i') {
1427                         int num = find_cmd_byname(arg);
1428                         if (num >= 0)
1429                                 command_list[num].handler();
1430                 }
1431                 free(tmp);
1432                 return;
1433         }
1434         /* not found, check internal key bindings */
1435         for (i = 0; command_list[i].handler; i++) {
1436                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1437                         command_list[i].handler();
1438                         return;
1439                 }
1440         }
1441         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1442                 km_keyname(c));
1443 }
1444
1445 __noreturn static void print_help_and_die(void)
1446 {
1447         struct ggo_help h = DEFINE_GGO_HELP(gui);
1448         bool d = conf.detailed_help_given;
1449
1450         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1451         exit(0);
1452 }
1453
1454 int main(int argc, char *argv[])
1455 {
1456         int ret;
1457
1458         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1459         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1460         version_handle_flag("gui", conf.version_given);
1461         if (conf.help_given || conf.detailed_help_given)
1462                 print_help_and_die();
1463         parse_config_file_or_die(false /* override */);
1464         setup_signal_handling();
1465         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1466         setlocale(LC_CTYPE, "");
1467         initscr(); /* needed only once, always successful */
1468         init_curses();
1469         for (;;) {
1470                 print_status_bar();
1471                 ret = do_select(GETCH_MODE);
1472                 if (!ret)
1473                         continue;
1474                 print_in_bar(COLOR_MSG, " ");
1475                 handle_command(ret);
1476         }
1477 }