gui.c

   1 /*
   2  * Copyright (C) 1998-2014 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file gui.c Curses-based interface for paraslash. */
   8
   9 #include <regex.h>
  10 #include <signal.h>
  11 #include <sys/types.h>
  12 #include <curses.h>
  13 #include <locale.h>
  14 #include <sys/time.h>
  15
  16 #include "gui.cmdline.h"
  17 #include "para.h"
  18 #include "gui.h"
  19 #include "string.h"
  20 #include "ringbuffer.h"
  21 #include "fd.h"
  22 #include "error.h"
  23 #include "list.h"
  24 #include "sched.h"
  25 #include "signal.h"
  26 #include "ggo.h"
  27 #include "version.h"
  28
  29 /** define the array of error lists needed by para_gui */
  30 INIT_GUI_ERRLISTS;
  31 static char *stat_content[NUM_STAT_ITEMS];
  32
  33 static int signal_pipe;
  34
  35 static struct gui_window {
  36         WINDOW *win;
  37         size_t cols;
  38         size_t lines;
  39 } top, bot, sb, in, sep;
  40
  41 #define RINGBUFFER_SIZE 512
  42 struct rb_entry {
  43         char *msg;
  44         size_t len;
  45         int color;
  46 };
  47 static struct ringbuffer *bot_win_rb;
  48 #define NUM_LINES(len) (1 + (len) / bot.cols)
  49
  50 static unsigned scroll_position;
  51
  52 static pid_t cmd_pid;
  53
  54 static int command_fds[2] = {-1, -1};
  55 static int stat_pipe = -1;
  56 static struct gui_args_info conf;
  57
  58 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  59
  60
  61 /**
  62  * Codes for various colors.
  63  *
  64  * Each status item has its own color pair. The ones defined here start at a
  65  * higher number so that they do not overlap with these.
  66  */
  67 enum gui_color_pair {
  68         COLOR_STATUSBAR = NUM_STAT_ITEMS + 1,
  69         COLOR_COMMAND,
  70         COLOR_OUTPUT,
  71         COLOR_MSG,
  72         COLOR_ERRMSG,
  73         COLOR_SEPARATOR,
  74         COLOR_TOP,
  75         COLOR_BOT,
  76 };
  77
  78 struct gui_command {
  79         const char *key;
  80         const char *name;
  81         const char *description;
  82         void (*handler)(void);
  83 };
  84
  85 static struct gui_theme theme;
  86
  87 static void com_help(void);
  88 static void com_reread_conf(void);
  89 static void com_enlarge_top_win(void);
  90 static void com_shrink_top_win(void);
  91 static void com_version(void);
  92 __noreturn static void com_quit(void);
  93 static void com_refresh(void);
  94 static void com_ll_incr(void);
  95 static void com_ll_decr(void);
  96 static void com_prev_theme(void);
  97 static void com_next_theme(void);
  98 static void com_scroll_up(void);
  99 static void com_scroll_down(void);
 100 static void com_page_up(void);
 101 static void com_page_down(void);
 102 static void com_cancel_scrolling(void);
 103 static void com_scroll_top(void);
 104
 105 static struct gui_command command_list[] = {
 106         {
 107                 .key = "?",
 108                 .name = "help",
 109                 .description = "print help",
 110                 .handler = com_help
 111         }, {
 112                 .key = "+",
 113                 .name = "enlarge_win",
 114                 .description = "enlarge the top window",
 115                 .handler = com_enlarge_top_win
 116         }, {
 117                 .key = "-",
 118                 .name = "shrink_win",
 119                 .description = "shrink the top window",
 120                 .handler = com_shrink_top_win
 121         }, {
 122                 .key = "r",
 123                 .name = "reread_conf",
 124                 .description = "reread configuration file",
 125                 .handler = com_reread_conf
 126         }, {
 127                 .key = "q",
 128                 .name = "quit",
 129                 .description = "exit para_gui",
 130                 .handler = com_quit
 131         }, {
 132                 .key = "^L",
 133                 .name = "refresh",
 134                 .description = "redraw the screen",
 135                 .handler = com_refresh
 136         }, {
 137                 .key = ".",
 138                 .name = "next_theme",
 139                 .description = "switch to next theme",
 140                 .handler = com_next_theme
 141         }, {
 142                 .key = ",",
 143                 .name = "prev_theme",
 144                 .description = "switch to previous stream",
 145                 .handler = com_prev_theme
 146         }, {
 147                 .key = ">",
 148                 .name = "ll_incr",
 149                 .description = "increase loglevel (decreases verbosity)",
 150                 .handler = com_ll_incr
 151         }, {
 152                 .key = "<",
 153                 .name = "ll_decr",
 154                 .description = "decrease loglevel (increases verbosity)",
 155                 .handler = com_ll_decr
 156         }, {
 157                 .key = "V",
 158                 .name = "version",
 159                 .description = "show the para_gui version",
 160                 .handler = com_version
 161         }, {
 162                 .key = "<up>",
 163                 .name = "scroll_up",
 164                 .description = "scroll up one line",
 165                 .handler = com_scroll_up
 166         }, {
 167                 .key = "<down>",
 168                 .name = "scroll_down",
 169                 .description = "scroll down one line",
 170                 .handler = com_scroll_down
 171         }, {
 172                 .key = "<ppage>",
 173                 .name = "page_up",
 174                 .description = "scroll up one page",
 175                 .handler = com_page_up
 176         }, {
 177                 .key = "<npage>",
 178                 .name = "page_down",
 179                 .description = "scroll down one page",
 180                 .handler = com_page_down
 181         }, {
 182                 .key = "<home>",
 183                 .name = "scroll_top",
 184                 .description = "scroll to top of buffer",
 185                 .handler = com_scroll_top
 186         }, {
 187                 .key = "<end>",
 188                 .name = "cancel_scroll",
 189                 .description = "deactivate scroll mode",
 190                 .handler = com_cancel_scrolling
 191         }, {
 192                 .handler = NULL
 193         }
 194 };
 195
 196 static int find_cmd_byname(char *name)
 197 {
 198         int i;
 199
 200         for (i = 0; command_list[i].handler; i++)
 201                 if (!strcmp(command_list[i].name, name))
 202                         return i;
 203         return -1;
 204 }
 205
 206 /* isendwin() returns false before initscr() was called */
 207 static bool curses_active(void)
 208 {
 209         return top.win && !isendwin();
 210 }
 211
 212 /* taken from mutt */
 213 static char *km_keyname(int c)
 214 {
 215         static char buf[10];
 216
 217         if (c == KEY_UP) {
 218                 sprintf(buf, "<up>");
 219                 return buf;
 220         }
 221         if (c == KEY_DOWN) {
 222                 sprintf(buf, "<down>");
 223                 return buf;
 224         }
 225         if (c == KEY_LEFT) {
 226                 sprintf(buf, "<left>");
 227                 return buf;
 228         }
 229         if (c == KEY_RIGHT) {
 230                 sprintf(buf, "<right>");
 231                 return buf;
 232         }
 233         if (c == KEY_NPAGE) {
 234                 sprintf(buf, "<npage>");
 235                 return buf;
 236         }
 237         if (c == KEY_PPAGE) {
 238                 sprintf(buf, "<ppage>");
 239                 return buf;
 240         }
 241         if (c == KEY_HOME) {
 242                 sprintf(buf, "<home>");
 243                 return buf;
 244         }
 245         if (c == KEY_END) {
 246                 sprintf(buf, "<end>");
 247                 return buf;
 248         }
 249         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 250                 if (c < 0)
 251                         c += 256;
 252                 if (c < 128) {
 253                         buf[0] = '^';
 254                         buf[1] = (c + '@') & 0x7f;
 255                         buf[2] = 0;
 256                 } else
 257                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 258                                 (c >> 3) & 7, c & 7);
 259         } else if (c >= KEY_F0 && c < KEY_F(256))
 260                 sprintf(buf, "<F%d>", c - KEY_F0);
 261         else if (isprint(c))
 262                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 263         else
 264                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 265         return buf;
 266 }
 267
 268 static char *configfile_exists(void)
 269 {
 270         static char *config_file;
 271         char *tmp;
 272
 273         if (!conf.config_file_given) {
 274                 if (!config_file) {
 275                         char *home = para_homedir();
 276                         config_file = make_message("%s/.paraslash/gui.conf",
 277                                 home);
 278                         free(home);
 279                 }
 280                 tmp = config_file;
 281         } else
 282                 tmp = conf.config_file_arg;
 283         return file_exists(tmp)? tmp: NULL;
 284 }
 285
 286 /* Print given number of spaces to curses window. */
 287 static void add_spaces(WINDOW* win, unsigned int num)
 288 {
 289         char space[] = "                                ";
 290         unsigned sz = sizeof(space) - 1; /* number of spaces */
 291
 292         while (num >= sz)  {
 293                 waddstr(win, space);
 294                 num -= sz;
 295         }
 296         if (num > 0) {
 297                 assert(num < sz);
 298                 space[num] = '\0';
 299                 waddstr(win, space);
 300         }
 301 }
 302
 303 /*
 304  * print aligned string to curses window. This function always prints
 305  * exactly len chars.
 306  */
 307 static int align_str(WINDOW* win, char *str, unsigned int len,
 308                 unsigned int align)
 309 {
 310         int ret, i, num; /* of spaces */
 311         size_t width;
 312
 313         if (!win || !str)
 314                 return 0;
 315         ret = strwidth(str, &width);
 316         if (ret < 0) {
 317                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 318                 width = 0;
 319                 str[0] = '\0';
 320         }
 321         num = len - width;
 322         if (num < 0) {
 323                 str[len] = '\0';
 324                 num = 0;
 325         }
 326         /* replace control characters by spaces */
 327         for (i = 0; i < len && str[i]; i++) {
 328                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 329                         str[i] = ' ';
 330         }
 331         if (align == LEFT) {
 332                 waddstr(win, str);
 333                 add_spaces(win, num);
 334         } else if (align == RIGHT) {
 335                 add_spaces(win, num);
 336                 waddstr(win, str);
 337         } else {
 338                 add_spaces(win, num / 2);
 339                 waddstr(win, str[0]? str: "");
 340                 add_spaces(win, num - num / 2);
 341         }
 342         return 1;
 343 }
 344
 345 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 346 {
 347         char *msg;
 348         va_list ap;
 349
 350         if (!curses_active())
 351                 return;
 352         wattron(in.win, COLOR_PAIR(color));
 353         va_start(ap, fmt);
 354         xvasprintf(&msg, fmt, ap);
 355         va_end(ap);
 356         wmove(in.win, 0, 0);
 357         align_str(in.win, msg, in.cols, LEFT);
 358         free(msg);
 359         wrefresh(in.win);
 360 }
 361
 362 static void print_status_bar(void)
 363 {
 364         char *tmp;
 365
 366         tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
 367         wmove(sb.win, 0, 0);
 368         align_str(sb.win, tmp, sb.cols, CENTER);
 369         free(tmp);
 370 }
 371
 372 /*
 373  * get the number of the oldest rbe that is (partially) visible. On return,
 374  * lines contains the sum of the number of lines of all visible entries. If the
 375  * first one is only partially visible, lines is greater than bot.lines.
 376  */
 377 static int first_visible_rbe(unsigned *lines)
 378 {
 379         int i;
 380         *lines = 0;
 381         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 382                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 383                 int rbe_lines;
 384                 if (!rbe)
 385                         return i - 1;
 386 //              fprintf(stderr, "found: %s\n", rbe->msg);
 387                 rbe_lines = NUM_LINES(rbe->len);
 388                 if (rbe_lines > bot.lines)
 389                         return -1;
 390                 *lines += rbe_lines;
 391                 if (*lines >= bot.lines)
 392                         return i;
 393         }
 394         return RINGBUFFER_SIZE - 1;
 395 }
 396
 397 /*
 398 returns number of first visible rbe, *lines is the number of lines drawn.
 399  */
 400 static int draw_top_rbe(unsigned *lines)
 401 {
 402         int ret, fvr = first_visible_rbe(lines);
 403         struct rb_entry *rbe;
 404         size_t bytes_to_skip, cells_to_skip, width;
 405
 406         if (fvr < 0)
 407                 return -1;
 408         wmove(bot.win, 0, 0);
 409         rbe = ringbuffer_get(bot_win_rb, fvr);
 410         if (!rbe)
 411                 return -1;
 412         if (*lines > bot.lines) {
 413                 /* rbe is partially visible multi-line */
 414                 cells_to_skip = (*lines - bot.lines) * bot.cols;
 415                 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
 416                 if (ret < 0)
 417                         return ret;
 418                 ret = strwidth(rbe->msg + bytes_to_skip, &width);
 419                 if (ret < 0)
 420                         return ret;
 421         } else {
 422                 bytes_to_skip = 0;
 423                 width = rbe->len;
 424         }
 425         wattron(bot.win, COLOR_PAIR(rbe->color));
 426         waddstr(bot.win, rbe->msg + bytes_to_skip);
 427         *lines = NUM_LINES(width);
 428         return fvr;
 429 }
 430
 431 static void redraw_bot_win(void)
 432 {
 433         unsigned lines;
 434         int i;
 435
 436         wmove(bot.win, 0, 0);
 437         wclear(bot.win);
 438         i = draw_top_rbe(&lines);
 439         if (i <= 0)
 440                 goto out;
 441         while (i > 0 && lines < bot.lines) {
 442                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 443                 if (!rbe) {
 444                         lines++;
 445                         waddstr(bot.win, "\n");
 446                         continue;
 447                 }
 448                 lines += NUM_LINES(rbe->len);
 449                 wattron(bot.win, COLOR_PAIR(rbe->color));
 450                 waddstr(bot.win, "\n");
 451                 waddstr(bot.win, rbe->msg);
 452         }
 453 out:
 454         wrefresh(bot.win);
 455 }
 456
 457 static void rb_add_entry(int color, char *msg)
 458 {
 459         struct rb_entry *old, *new;
 460         int x, y;
 461         size_t len;
 462
 463         if (strwidth(msg, &len) < 0)
 464                 return;
 465         new = para_malloc(sizeof(struct rb_entry));
 466         new->color = color;
 467         new->len = len;
 468         new->msg = msg;
 469         old = ringbuffer_add(bot_win_rb, new);
 470 //      fprintf(stderr, "added: %s\n", new->msg);
 471         if (old) {
 472                 free(old->msg);
 473                 free(old);
 474         }
 475         if (scroll_position) {
 476                 /* discard current scrolling, like xterm does */
 477                 scroll_position = 0;
 478                 redraw_bot_win();
 479                 return;
 480         }
 481         wattron(bot.win, COLOR_PAIR(color));
 482         getyx(bot.win, y, x);
 483         if (y || x)
 484                 waddstr(bot.win, "\n");
 485         waddstr(bot.win, msg);
 486 }
 487
 488 /*
 489  * print formated output to bot win and refresh
 490  */
 491 __printf_2_3 static void outputf(int color, const char* fmt,...)
 492 {
 493         char *msg;
 494         va_list ap;
 495
 496         if (!curses_active())
 497                 return;
 498         va_start(ap, fmt);
 499         xvasprintf(&msg, fmt, ap);
 500         va_end(ap);
 501         rb_add_entry(color, msg);
 502         wrefresh(bot.win);
 503 }
 504
 505 static int add_output_line(char *line, void *data)
 506 {
 507         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 508
 509         if (!curses_active())
 510                 return 1;
 511         rb_add_entry(color, para_strdup(line));
 512         return 1;
 513 }
 514
 515 static int loglevel;
 516
 517 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
 518 {
 519         int color;
 520         char *msg;
 521         va_list ap;
 522         unsigned bytes;
 523
 524         if (ll < loglevel || !curses_active())
 525                 return;
 526         switch (ll) {
 527                 case LL_DEBUG:
 528                 case LL_INFO:
 529                 case LL_NOTICE:
 530                         color = COLOR_MSG;
 531                         break;
 532                 default:
 533                         color = COLOR_ERRMSG;
 534         }
 535         va_start(ap, fmt);
 536         bytes = xvasprintf(&msg, fmt, ap);
 537         va_end(ap);
 538         if (bytes > 0 && msg[bytes - 1] == '\n')
 539                 msg[bytes - 1] = '\0'; /* cut trailing newline */
 540         rb_add_entry(color, msg);
 541         wrefresh(bot.win);
 542 }
 543 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 544
 545 static void setup_signal_handling(void)
 546 {
 547         signal_pipe = para_signal_init();
 548         para_install_sighandler(SIGINT);
 549         para_install_sighandler(SIGTERM);
 550         para_install_sighandler(SIGCHLD);
 551         para_install_sighandler(SIGWINCH);
 552         para_install_sighandler(SIGUSR1);
 553 }
 554
 555 /* kill every process in the process group and exit */
 556 __noreturn static void kill_pg_and_die(int ret)
 557 {
 558         para_sigaction(SIGTERM, SIG_IGN);
 559         kill(0, SIGTERM);
 560         exit(ret);
 561 }
 562
 563 static void shutdown_curses(void)
 564 {
 565         def_prog_mode();
 566         endwin();
 567 }
 568
 569 __noreturn static void finish(int ret)
 570 {
 571         shutdown_curses();
 572         kill_pg_and_die(ret);
 573 }
 574
 575 /*
 576  * exit curses and print given message to stdout/stderr
 577  */
 578 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 579 {
 580         va_list argp;
 581         FILE *outfd = ret? stderr: stdout;
 582
 583         shutdown_curses();
 584         va_start(argp, fmt);
 585         vfprintf(outfd, fmt, argp);
 586         va_end(argp);
 587         kill_pg_and_die(ret);
 588 }
 589
 590 /*
 591  * init all windows
 592  */
 593 static void init_wins(int top_lines)
 594 {
 595         int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
 596                 in_y = LINES - 1, sep_y = top_lines;
 597
 598         top.lines = top_lines;
 599         bot.lines = LINES - top.lines - 3;
 600         sb.lines = in.lines = sep.lines = 1;
 601
 602         top.cols = bot.cols = sb.cols = in.cols = sep.cols = COLS;
 603
 604         assume_default_colors(theme.default_fg, theme.default_bg);
 605         if (top.win) {
 606                 wresize(top.win, top.lines, top.cols);
 607                 mvwin(top.win, top_y, 0);
 608
 609                 wresize(sb.win, sb.lines, sb.cols);
 610                 mvwin(sb.win, sb_y, 0);
 611
 612                 wresize(sep.win, sep.lines, sep.cols);
 613                 mvwin(sep.win, sep_y, 0);
 614
 615                 wresize(bot.win, bot.lines, bot.cols);
 616                 mvwin(bot.win, bot_y, 0);
 617
 618                 wresize(in.win, in.lines, in.cols);
 619                 mvwin(in.win, in_y, 0);
 620         } else {
 621                 sep.win = newwin(sep.lines, sep.cols, sep_y, 0);
 622                 top.win = newwin(top.lines, top.cols, top_y, 0);
 623                 bot.win = newwin(bot.lines, bot.cols, bot_y, 0);
 624                 sb.win = newwin(sb.lines, sb.cols, sb_y, 0);
 625                 in.win = newwin(in.lines, in.cols, in_y, 0);
 626                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 627                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 628                 wclear(bot.win);
 629                 wclear(sb.win);
 630                 wclear(in.win);
 631                 scrollok(bot.win, 1);
 632                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 633                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 634                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 635                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 636                 nodelay(top.win, 1);
 637                 nodelay(bot.win, 1);
 638                 nodelay(sb.win, 1);
 639                 nodelay(in.win, 0);
 640
 641                 keypad(top.win, 1);
 642                 keypad(bot.win, 1);
 643                 keypad(sb.win, 1);
 644                 keypad(in.win, 1);
 645         }
 646         wmove(sep.win, 0, 0);
 647         whline(sep.win, theme.sep_char, COLS);
 648         wclear(top.win);
 649         //wclear(bot.win);
 650         wnoutrefresh(top.win);
 651         wnoutrefresh(bot.win);
 652         print_status_bar();
 653         wnoutrefresh(sb.win);
 654         wnoutrefresh(in.win);
 655         wnoutrefresh(sep.win);
 656         doupdate();
 657 }
 658
 659 /*
 660  * Print stat item #i to curses window
 661  */
 662 static void print_stat_item(int i)
 663 {
 664         char *tmp;
 665         struct stat_item_data d = theme.data[i];
 666         char *c = stat_content[i];
 667
 668         if (!curses_active() || !d.len || !c)
 669                 return;
 670         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 671         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 672         wrefresh(top.win);
 673         wattron(top.win, COLOR_PAIR(i + 1));
 674         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 675         free(tmp);
 676         wrefresh(top.win);
 677 }
 678
 679 static int update_item(int item_num, char *buf)
 680 {
 681         char **c = stat_content + item_num;
 682
 683         free(*c);
 684         if (buf && buf[0])
 685                 goto dup;
 686         switch (item_num) {
 687         case SI_ARTIST:
 688                 *c = para_strdup("(artist tag not set)");
 689                 goto print;
 690         case SI_TITLE:
 691                 *c = para_strdup("(title tag not set)");
 692                 goto print;
 693         case SI_YEAR:
 694                 *c = para_strdup("????");
 695                 goto print;
 696         case SI_ALBUM:
 697                 *c = para_strdup("(album tag not set)");
 698                 goto print;
 699         case SI_COMMENT:
 700                 *c = para_strdup("(comment tag not set)");
 701                 goto print;
 702         }
 703 dup:
 704         *c = para_strdup(buf);
 705 print:
 706         print_stat_item(item_num);
 707         return 1;
 708 }
 709
 710 static int read_stat_pipe(fd_set *rfds)
 711 {
 712         static char *buf;
 713         static int bufsize, loaded;
 714         int ret, ret2;
 715         size_t sz;
 716
 717         if (stat_pipe < 0)
 718                 return 0;
 719         if (loaded >= bufsize) {
 720                 if (bufsize > 1000 * 1000) {
 721                         loaded = 0;
 722                         return 0;
 723                 }
 724                 bufsize += bufsize + 1000;
 725                 buf = para_realloc(buf, bufsize);
 726         }
 727         assert(loaded < bufsize);
 728         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 729                 rfds, &sz);
 730         loaded += sz;
 731         ret2 = for_each_stat_item(buf, loaded, update_item);
 732         if (ret < 0 || ret2 < 0) {
 733                 loaded = 0;
 734                 return ret2 < 0? ret2 : ret;
 735         }
 736         sz = ret2; /* what is left */
 737         if (sz > 0 && sz < loaded)
 738                 memmove(buf, buf + loaded - sz, sz);
 739         loaded = sz;
 740         return 1;
 741 }
 742
 743 static void print_all_items(void)
 744 {
 745         int i;
 746
 747         if (!curses_active())
 748                 return;
 749         FOR_EACH_STATUS_ITEM(i)
 750                 print_stat_item(i);
 751 }
 752
 753 static void clear_all_items(void)
 754 {
 755         int i;
 756
 757         FOR_EACH_STATUS_ITEM(i) {
 758                 free(stat_content[i]);
 759                 stat_content[i] = para_strdup("");
 760         }
 761 }
 762
 763 static void init_pair_or_die(short pair, short f, short b)
 764 {
 765         if (init_pair(pair, f, b) == ERR)
 766                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 767 }
 768
 769 static void init_colors_or_die(void)
 770 {
 771         int i;
 772
 773         if (!has_colors())
 774                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 775         if (start_color() == ERR)
 776                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 777         FOR_EACH_STATUS_ITEM(i)
 778                 if (theme.data[i].len)
 779                         init_pair_or_die(i + 1, theme.data[i].fg,
 780                                 theme.data[i].bg);
 781         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 782         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 783         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 784         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 785         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 786         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 787         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 788         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 789 }
 790
 791 /* (Re-)initialize the curses library. */
 792 static void init_curses(void)
 793 {
 794         if (curses_active())
 795                 return;
 796         if (top.win && refresh() == ERR) /* refresh is really needed */
 797                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 798         if (LINES < theme.lines_min || COLS < theme.cols_min)
 799                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 800                         " (need at least %dx%d)\n", COLS, LINES,
 801                         theme.cols_min, theme.lines_min);
 802         curs_set(0); /* make cursor invisible, ignore errors */
 803         nonl(); /* do not NL->CR/NL on output, always returns OK */
 804         /* don't echo input */
 805         if (noecho() == ERR)
 806                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 807         /* take input chars one at a time, no wait for \n */
 808         if (cbreak() == ERR)
 809                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 810         init_colors_or_die();
 811         clear(); /* ignore non-fatal errors */
 812         init_wins(theme.top_lines_default);
 813         print_all_items();
 814         // noecho(); /* don't echo input */
 815 }
 816
 817 static void check_sigchld(void)
 818 {
 819         int ret;
 820         pid_t pid;
 821
 822 reap_next_child:
 823         ret = para_reap_child(&pid);
 824         if (ret <= 0)
 825                 return;
 826         if (pid == cmd_pid)
 827                 cmd_pid = 0;
 828         goto reap_next_child;
 829 }
 830
 831 /*
 832  * This sucker modifies its first argument. *handler and *arg are
 833  * pointers to 0-terminated strings (inside line). Crap.
 834  */
 835 static int split_key_map(char *line, char **handler, char **arg)
 836 {
 837         if (!(*handler = strchr(line + 1, ':')))
 838                 goto err_out;
 839         **handler = '\0';
 840         (*handler)++;
 841         if (!(*arg = strchr(*handler, ':')))
 842                 goto err_out;
 843         **arg = '\0';
 844         (*arg)++;
 845         return 1;
 846 err_out:
 847         return 0;
 848 }
 849
 850 static int check_key_map_args(void)
 851 {
 852         char *s;
 853         int i, ret = -1;
 854         char *tmp = NULL, *handler, *arg;
 855
 856         for (i = 0; i < conf.key_map_given; ++i) {
 857                 s = conf.key_map_arg[i];
 858                 if (!(*s))
 859                         goto out;
 860                 free(tmp);
 861                 tmp = para_strdup(s);
 862                 if (!split_key_map(tmp, &handler, &arg))
 863                         goto out;
 864                 if (strlen(handler) != 1)
 865                         goto out;
 866                 if (*handler != 'x'
 867                         && *handler != 'd'
 868                         && *handler != 'i'
 869                         && *handler != 'p')
 870                         goto out;
 871                 if (*handler != 'i')
 872                         continue;
 873                 if (find_cmd_byname(arg) < 0)
 874                         goto out;
 875         }
 876         ret = 0;
 877 out:
 878         free(tmp);
 879         return ret;
 880 }
 881
 882 /*
 883  * React to various signal-related events
 884  */
 885 static void handle_signal(int sig)
 886 {
 887         switch (sig) {
 888         case SIGTERM:
 889                 msg_n_exit(EXIT_FAILURE,
 890                         "only the good die young (caught SIGTERM))\n");
 891                 return;
 892         case SIGWINCH:
 893                 if (curses_active()) {
 894                         shutdown_curses();
 895                         init_curses();
 896                         redraw_bot_win();
 897                 }
 898                 return;
 899         case SIGINT:
 900                 PARA_WARNING_LOG("caught SIGINT, reset\n");
 901                 /* Nothing to do. SIGINT killed our child which gets noticed
 902                  * by do_select and resets everything.
 903                  */
 904                 return;
 905         case SIGUSR1:
 906                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
 907                 com_reread_conf();
 908                 return;
 909         case SIGCHLD:
 910                 check_sigchld();
 911                 return;
 912         }
 913 }
 914
 915 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
 916 {
 917         static struct timeval next_exec, atm, diff;
 918         int ret, fds[3] = {0, 1, 0};
 919         pid_t pid;
 920
 921         if (stat_pipe >= 0)
 922                 goto success;
 923         /* Avoid busy loop */
 924         gettimeofday(&atm, NULL);
 925         if (tv_diff(&next_exec, &atm, &diff) > 0) {
 926                 if (tv_diff(&diff, tv, NULL) < 0)
 927                         *tv = diff;
 928                 return;
 929         }
 930         next_exec.tv_sec = atm.tv_sec + 2;
 931         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 932         if (ret < 0)
 933                 return;
 934         ret = mark_fd_nonblocking(fds[1]);
 935         if (ret < 0) {
 936                 close(fds[1]);
 937                 return;
 938         }
 939         stat_pipe = fds[1];
 940 success:
 941         para_fd_set(stat_pipe, rfds, max_fileno);
 942 }
 943
 944 #define COMMAND_BUF_SIZE 32768
 945
 946 /*
 947  * This is the core select loop. Besides the (internal) signal
 948  * pipe, the following other fds are checked according to the mode:
 949  *
 950  * GETCH_MODE: check stdin, return when key is pressed
 951  *
 952  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 953  * stdout and stderr or when any key is pressed.
 954  *
 955  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 956  * is running. During that time curses is disabled.  Returns when
 957  * cmd_pid == 0.
 958  */
 959 static int do_select(int mode)
 960 {
 961         fd_set rfds;
 962         int ret, i, max_fileno;
 963         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 964         int cbo[2] = {0, 0}; /* command buf offsets */
 965         struct timeval tv;
 966         unsigned flags[2] = {0, 0}; /* for for_each_line() */
 967
 968 repeat:
 969         tv.tv_sec = conf.timeout_arg  / 1000;
 970         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 971 //      ret = refresh_status();
 972         FD_ZERO(&rfds);
 973         max_fileno = 0;
 974         status_pre_select(&rfds, &max_fileno, &tv);
 975         /* signal pipe */
 976         para_fd_set(signal_pipe, &rfds, &max_fileno);
 977         /* command pipe only for COMMAND_MODE */
 978         if (mode == COMMAND_MODE) {
 979                 if (command_fds[0] >= 0)
 980                         para_fd_set(command_fds[0], &rfds, &max_fileno);
 981                 if (command_fds[1] >= 0)
 982                         para_fd_set(command_fds[1], &rfds, &max_fileno);
 983         }
 984         if (mode == GETCH_MODE || mode == COMMAND_MODE)
 985                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
 986         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 987         if (ret <= 0)
 988                 goto check_return; /* skip fd checks */
 989         /* signals */
 990         ret = para_next_signal(&rfds);
 991         if (ret > 0)
 992                 handle_signal(ret);
 993         /* read command pipe if ready */
 994         if (mode == COMMAND_MODE) {
 995                 for (i = 0; i < 2; i++) {
 996                         size_t sz;
 997                         if (command_fds[i] < 0)
 998                                 continue;
 999                         ret = read_nonblock(command_fds[i],
1000                                 command_buf[i] + cbo[i],
1001                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1002                         cbo[i] += sz;
1003                         sz = cbo[i];
1004                         cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1005                                 add_output_line, &i);
1006                         if (sz != cbo[i]) { /* at least one line found */
1007                                 wrefresh(bot.win);
1008                                 flags[i] = 0;
1009                         }
1010                         if (ret < 0) {
1011                                 PARA_NOTICE_LOG("closing command fd %d: %s\n",
1012                                         i, para_strerror(-ret));
1013                                 close(command_fds[i]);
1014                                 command_fds[i] = -1;
1015                                 flags[i] = 0;
1016                                 cbo[i] = 0;
1017                                 if (command_fds[!i] < 0) /* both fds closed */
1018                                         return 0;
1019                         }
1020                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1021                                 PARA_NOTICE_LOG("discarding overlong line\n");
1022                                 cbo[i] = 0;
1023                                 flags[i] = FELF_DISCARD_FIRST;
1024                         }
1025                 }
1026         }
1027         ret = read_stat_pipe(&rfds);
1028         if (ret < 0) {
1029                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1030                 close(stat_pipe);
1031                 stat_pipe = -1;
1032                 clear_all_items();
1033                 free(stat_content[SI_BASENAME]);
1034                 stat_content[SI_BASENAME] =
1035                         para_strdup("stat command terminated!?");
1036                 print_all_items();
1037         }
1038 check_return:
1039         switch (mode) {
1040         case COMMAND_MODE:
1041                 ret = wgetch(top.win);
1042                 if (ret != ERR && ret != KEY_RESIZE) {
1043                         if (cmd_pid)
1044                                 kill(cmd_pid, SIGTERM);
1045                         return -1;
1046                 }
1047                 break;
1048         case GETCH_MODE:
1049                 ret = wgetch(top.win);
1050                 if (ret != ERR && ret != KEY_RESIZE)
1051                         return ret;
1052                 break;
1053         case EXTERNAL_MODE:
1054                 if (cmd_pid == 0)
1055                         return 0;
1056         }
1057         goto repeat;
1058 }
1059
1060 /* read from command pipe and print data to bot window */
1061 static void exec_and_display_cmd(const char *cmd)
1062 {
1063         int ret, fds[3] = {0, 1, 1};
1064
1065         outputf(COLOR_COMMAND, "%s", cmd);
1066         ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1067         if (ret < 0)
1068                 return;
1069         ret = mark_fd_nonblocking(fds[1]);
1070         if (ret < 0)
1071                 goto fail;
1072         ret = mark_fd_nonblocking(fds[2]);
1073         if (ret < 0)
1074                 goto fail;
1075         command_fds[0] = fds[1];
1076         command_fds[1] = fds[2];
1077         if (do_select(COMMAND_MODE) >= 0)
1078                 PARA_INFO_LOG("command complete\n");
1079         else
1080                 PARA_NOTICE_LOG("command aborted\n");
1081         print_in_bar(COLOR_MSG, " ");
1082         return;
1083 fail:
1084         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1085         close(command_fds[0]);
1086         close(command_fds[1]);
1087 }
1088
1089 static void para_cmd(char *cmd)
1090 {
1091         char *c;
1092
1093         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1094         c = make_message(BINDIR "/para_client -- %s", cmd);
1095         exec_and_display_cmd(c);
1096         free(c);
1097 }
1098
1099 static void display_cmd(char *cmd)
1100 {
1101         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1102         exec_and_display_cmd(cmd);
1103 }
1104
1105 /*
1106  * shutdown curses and stat pipe before executing external commands
1107  */
1108 static void external_cmd(char *cmd)
1109 {
1110         int fds[3] = {-1, -1, -1};
1111
1112         if (cmd_pid)
1113                 return;
1114         shutdown_curses();
1115         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1116                 return;
1117         do_select(EXTERNAL_MODE);
1118         init_curses();
1119 }
1120
1121 static void print_scroll_msg(void)
1122 {
1123         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1124         int first_rbe = first_visible_rbe(&lines_total);
1125
1126         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1127                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1128 }
1129
1130 static void com_scroll_top(void)
1131 {
1132         int i = RINGBUFFER_SIZE - 1;
1133         unsigned lines = 0;
1134
1135         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1136                 i--;
1137         /* i is oldest entry */
1138         for (; lines < bot.lines && i >= 0; i--) {
1139                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1140                 if (!rbe)
1141                         break;
1142                 lines += NUM_LINES(rbe->len);
1143         }
1144         i++;
1145         if (lines > 0 && scroll_position != i) {
1146                 scroll_position = i;
1147                 redraw_bot_win();
1148                 print_scroll_msg();
1149                 return;
1150         }
1151         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1152 }
1153
1154 static void com_cancel_scrolling(void)
1155 {
1156
1157         if (scroll_position == 0) {
1158                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1159                 return;
1160         }
1161         scroll_position = 0;
1162         redraw_bot_win();
1163 }
1164
1165 static void com_page_down(void)
1166 {
1167         unsigned lines = 0;
1168         int i = scroll_position;
1169
1170         while (lines < bot.lines && --i > 0) {
1171                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1172                 if (!rbe)
1173                         break;
1174                 lines += NUM_LINES(rbe->len);
1175         }
1176         if (lines) {
1177                 scroll_position = i;
1178                 redraw_bot_win();
1179                 print_scroll_msg();
1180                 return;
1181         }
1182         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1183 }
1184
1185 static void com_page_up(void)
1186 {
1187         unsigned lines;
1188         int fvr = first_visible_rbe(&lines);
1189
1190         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1191                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1192                 return;
1193         }
1194         scroll_position = fvr + 1;
1195         for (; scroll_position > 0; scroll_position--) {
1196                 first_visible_rbe(&lines);
1197                 if (lines == bot.lines)
1198                         break;
1199         }
1200         redraw_bot_win();
1201         print_scroll_msg();
1202 }
1203
1204 static void com_scroll_down(void)
1205 {
1206         struct rb_entry *rbe;
1207         int rbe_lines;
1208
1209         if (!scroll_position) {
1210                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1211                 return;
1212         }
1213         scroll_position--;
1214         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1215         rbe_lines = NUM_LINES(rbe->len);
1216         wscrl(bot.win, rbe_lines);
1217         wmove(bot.win, bot.lines - rbe_lines, 0);
1218         wattron(bot.win, COLOR_PAIR(rbe->color));
1219         waddstr(bot.win, rbe->msg);
1220         wrefresh(bot.win);
1221         print_scroll_msg();
1222 }
1223
1224 static void com_scroll_up(void)
1225 {
1226         struct rb_entry *rbe = NULL;
1227         unsigned lines;
1228         int i, first_rbe, num_scroll;
1229
1230         /* the entry that is going to vanish */
1231         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1232         if (!rbe)
1233                 goto err_out;
1234         num_scroll = NUM_LINES(rbe->len);
1235         first_rbe = first_visible_rbe(&lines);
1236         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1237                 goto err_out;
1238         scroll_position++;
1239         wscrl(bot.win, -num_scroll);
1240         i = draw_top_rbe(&lines);
1241         if (i < 0)
1242                 goto err_out;
1243         while (i > 0 && lines < num_scroll) {
1244                 int rbe_lines;
1245                 rbe = ringbuffer_get(bot_win_rb, --i);
1246                 if (!rbe)
1247                         break;
1248                 rbe_lines = NUM_LINES(rbe->len);
1249                 lines += rbe_lines;
1250 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1251                 wattron(bot.win, COLOR_PAIR(rbe->color));
1252                 waddstr(bot.win, "\n");
1253                 waddstr(bot.win, rbe->msg);
1254                 if (!i)
1255                         break;
1256                 i--;
1257         }
1258         wrefresh(bot.win);
1259         print_scroll_msg();
1260         return;
1261 err_out:
1262         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1263 }
1264
1265 static void com_ll_decr(void)
1266 {
1267         if (loglevel <= LL_DEBUG) {
1268                 print_in_bar(COLOR_ERRMSG,
1269                         "loglevel already at maximal verbosity\n");
1270                 return;
1271         }
1272         loglevel--;
1273         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1274 }
1275
1276 static void com_ll_incr(void)
1277 {
1278         if (loglevel >= LL_EMERG) {
1279                 print_in_bar(COLOR_ERRMSG,
1280                         "loglevel already at minimal verbosity\n");
1281                 return;
1282         }
1283         loglevel++;
1284         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1285 }
1286
1287 /*
1288  * reread configuration, terminate on errors
1289  */
1290 static void com_reread_conf(void)
1291 {
1292         char *cf = configfile_exists();
1293         struct gui_cmdline_parser_params params = {
1294                 .override = 1,
1295                 .initialize = 1,
1296                 .check_required = 0,
1297                 .check_ambiguity = 0,
1298                 .print_errors = 0,
1299         };
1300
1301         if (!cf) {
1302                 PARA_WARNING_LOG("there is no configuration to read\n");
1303                 return;
1304         }
1305         PARA_INFO_LOG("rereading command line options and config file\n");
1306         /*
1307          * Despite .print_errors is set to 0, gengetopt will print to stderr
1308          * anyway, and exit on errors. So we have to shutdown curses first.
1309          */
1310         shutdown_curses();
1311         gui_cmdline_parser_config_file(cf, &conf, &params);
1312         init_curses();
1313         PARA_NOTICE_LOG("config file reloaded\n");
1314         if (check_key_map_args() < 0)
1315                 finish(EXIT_FAILURE);
1316 }
1317
1318 static void com_help(void)
1319 {
1320         int i;
1321
1322         for (i = 0; i < conf.key_map_given; ++i) {
1323                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1324                 const char *handler_text = "???", *desc = NULL;
1325
1326                 if (!split_key_map(tmp, &handler, &arg)) {
1327                         free(tmp);
1328                         return;
1329                 }
1330                 switch (*handler) {
1331                         case 'i':
1332                                 handler_text = "internal";
1333                                 desc = command_list[find_cmd_byname(arg)].description;
1334                                 break;
1335                         case 'x': handler_text = "external"; break;
1336                         case 'd': handler_text = "display "; break;
1337                         case 'p': handler_text = "para    "; break;
1338                 }
1339                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1340                         strlen(arg) < 8? "\t" : "",
1341                         desc? desc : "");
1342                 free(tmp);
1343         }
1344         for (i = 0; command_list[i].handler; i++) {
1345                 struct gui_command gc = command_list[i];
1346
1347                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1348                         strlen(gc.name) < 8? "\t" : "",
1349                         gc.description);
1350         }
1351         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1352                 "for more info");
1353 }
1354
1355 static void com_shrink_top_win(void)
1356 {
1357         if (top.lines <= theme.top_lines_min) {
1358                 PARA_WARNING_LOG("can not decrease top window\n");
1359                 return;
1360         }
1361         init_wins(top.lines - 1);
1362         print_all_items();
1363         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1364 }
1365
1366 static void com_enlarge_top_win(void)
1367 {
1368         if (bot.lines < 3) {
1369                 PARA_WARNING_LOG("can not increase top window\n");
1370                 return;
1371         }
1372         init_wins(top.lines + 1);
1373         print_all_items();
1374         print_in_bar(COLOR_MSG, "increased top window");
1375 }
1376
1377 static void com_version(void)
1378 {
1379         print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1380 }
1381
1382 __noreturn static void com_quit(void)
1383 {
1384         finish(0);
1385 }
1386
1387 static void com_refresh(void)
1388 {
1389         shutdown_curses();
1390         init_curses();
1391 }
1392
1393 static void com_next_theme(void)
1394 {
1395         theme_next(&theme);
1396         com_refresh();
1397 }
1398
1399 static void com_prev_theme(void)
1400 {
1401         theme_prev(&theme);
1402         com_refresh();
1403 }
1404
1405 static void handle_command(int c)
1406 {
1407         int i;
1408
1409         /* first check user-defined key bindings */
1410         for (i = 0; i < conf.key_map_given; ++i) {
1411                 char *tmp, *handler, *arg;
1412
1413                 tmp = para_strdup(conf.key_map_arg[i]);
1414                 if (!split_key_map(tmp, &handler, &arg)) {
1415                         free(tmp);
1416                         return;
1417                 }
1418                 if (strcmp(tmp, km_keyname(c))) {
1419                         free(tmp);
1420                         continue;
1421                 }
1422                 if (*handler == 'd')
1423                         display_cmd(arg);
1424                 else if (*handler == 'x')
1425                         external_cmd(arg);
1426                 else if (*handler == 'p')
1427                         para_cmd(arg);
1428                 else if (*handler == 'i') {
1429                         int num = find_cmd_byname(arg);
1430                         if (num >= 0)
1431                                 command_list[num].handler();
1432                 }
1433                 free(tmp);
1434                 return;
1435         }
1436         /* not found, check internal key bindings */
1437         for (i = 0; command_list[i].handler; i++) {
1438                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1439                         command_list[i].handler();
1440                         return;
1441                 }
1442         }
1443         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1444                 km_keyname(c));
1445 }
1446
1447 __noreturn static void print_help_and_die(void)
1448 {
1449         struct ggo_help h = DEFINE_GGO_HELP(gui);
1450         bool d = conf.detailed_help_given;
1451
1452         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1453         exit(0);
1454 }
1455
1456 int main(int argc, char *argv[])
1457 {
1458         int ret;
1459         char *cf;
1460
1461         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1462         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1463         version_handle_flag("gui", conf.version_given);
1464         if (conf.help_given || conf.detailed_help_given)
1465                 print_help_and_die();
1466         cf = configfile_exists();
1467         if (!cf && conf.config_file_given) {
1468                 fprintf(stderr, "can not read config file %s\n",
1469                         conf.config_file_arg);
1470                 exit(EXIT_FAILURE);
1471         }
1472         if (cf) {
1473                 struct gui_cmdline_parser_params params = {
1474                         .override = 0,
1475                         .initialize = 0,
1476                         .check_required = 0,
1477                         .check_ambiguity = 0,
1478                         .print_errors = 1,
1479                 };
1480                 gui_cmdline_parser_config_file(cf, &conf, &params);
1481                 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1482         }
1483         if (check_key_map_args() < 0) {
1484                 fprintf(stderr, "invalid key map\n");
1485                 exit(EXIT_FAILURE);
1486         }
1487         theme_init(conf.theme_arg, &theme);
1488         setup_signal_handling();
1489         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1490         setlocale(LC_CTYPE, "");
1491         initscr(); /* needed only once, always successful */
1492         init_curses();
1493         for (;;) {
1494                 print_status_bar();
1495                 ret = do_select(GETCH_MODE);
1496                 if (!ret)
1497                         continue;
1498                 print_in_bar(COLOR_MSG, " ");
1499                 handle_command(ret);
1500         }
1501 }