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                 rbe_lines = NUM_LINES(rbe->len);
 387                 if (rbe_lines > bot.lines)
 388                         return -1;
 389                 *lines += rbe_lines;
 390                 if (*lines >= bot.lines)
 391                         return i;
 392         }
 393         return RINGBUFFER_SIZE - 1;
 394 }
 395
 396 /*
 397 returns number of first visible rbe, *lines is the number of lines drawn.
 398  */
 399 static int draw_top_rbe(unsigned *lines)
 400 {
 401         int ret, fvr = first_visible_rbe(lines);
 402         struct rb_entry *rbe;
 403         size_t bytes_to_skip, cells_to_skip, width;
 404
 405         if (fvr < 0)
 406                 return -1;
 407         wmove(bot.win, 0, 0);
 408         rbe = ringbuffer_get(bot_win_rb, fvr);
 409         if (!rbe)
 410                 return -1;
 411         if (*lines > bot.lines) {
 412                 /* rbe is partially visible multi-line */
 413                 cells_to_skip = (*lines - bot.lines) * bot.cols;
 414                 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
 415                 if (ret < 0)
 416                         return ret;
 417                 ret = strwidth(rbe->msg + bytes_to_skip, &width);
 418                 if (ret < 0)
 419                         return ret;
 420         } else {
 421                 bytes_to_skip = 0;
 422                 width = rbe->len;
 423         }
 424         wattron(bot.win, COLOR_PAIR(rbe->color));
 425         waddstr(bot.win, rbe->msg + bytes_to_skip);
 426         *lines = NUM_LINES(width);
 427         return fvr;
 428 }
 429
 430 static void redraw_bot_win(void)
 431 {
 432         unsigned lines;
 433         int i;
 434
 435         wmove(bot.win, 0, 0);
 436         wclear(bot.win);
 437         i = draw_top_rbe(&lines);
 438         if (i <= 0)
 439                 goto out;
 440         while (i > 0 && lines < bot.lines) {
 441                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 442                 if (!rbe) {
 443                         lines++;
 444                         waddstr(bot.win, "\n");
 445                         continue;
 446                 }
 447                 lines += NUM_LINES(rbe->len);
 448                 wattron(bot.win, COLOR_PAIR(rbe->color));
 449                 waddstr(bot.win, "\n");
 450                 waddstr(bot.win, rbe->msg);
 451         }
 452 out:
 453         wrefresh(bot.win);
 454 }
 455
 456 static void rb_add_entry(int color, char *msg)
 457 {
 458         struct rb_entry *old, *new;
 459         int x, y;
 460         size_t len;
 461
 462         if (strwidth(msg, &len) < 0)
 463                 return;
 464         new = para_malloc(sizeof(struct rb_entry));
 465         new->color = color;
 466         new->len = len;
 467         new->msg = msg;
 468         old = ringbuffer_add(bot_win_rb, new);
 469         if (old) {
 470                 free(old->msg);
 471                 free(old);
 472         }
 473         if (scroll_position) {
 474                 /* discard current scrolling, like xterm does */
 475                 scroll_position = 0;
 476                 redraw_bot_win();
 477                 return;
 478         }
 479         wattron(bot.win, COLOR_PAIR(color));
 480         getyx(bot.win, y, x);
 481         if (y || x)
 482                 waddstr(bot.win, "\n");
 483         waddstr(bot.win, msg);
 484 }
 485
 486 /*
 487  * print formated output to bot win and refresh
 488  */
 489 __printf_2_3 static void outputf(int color, const char* fmt,...)
 490 {
 491         char *msg;
 492         va_list ap;
 493
 494         if (!curses_active())
 495                 return;
 496         va_start(ap, fmt);
 497         xvasprintf(&msg, fmt, ap);
 498         va_end(ap);
 499         rb_add_entry(color, msg);
 500         wrefresh(bot.win);
 501 }
 502
 503 static int add_output_line(char *line, void *data)
 504 {
 505         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 506
 507         if (!curses_active())
 508                 return 1;
 509         rb_add_entry(color, para_strdup(line));
 510         return 1;
 511 }
 512
 513 static int loglevel;
 514
 515 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
 516 {
 517         va_list ap;
 518
 519         if (ll < loglevel)
 520                 return;
 521         va_start(ap, fmt);
 522         if (curses_active()) {
 523                 int color = ll <= LL_NOTICE? COLOR_MSG : COLOR_ERRMSG;
 524                 char *msg;
 525                 unsigned bytes = xvasprintf(&msg, fmt, ap);
 526                 if (bytes > 0 && msg[bytes - 1] == '\n')
 527                         msg[bytes - 1] = '\0'; /* cut trailing newline */
 528                 rb_add_entry(color, msg);
 529                 wrefresh(bot.win);
 530         } else if (cmd_pid <= 0) /* no external command running */
 531                 vfprintf(stderr, fmt, ap);
 532         va_end(ap);
 533 }
 534 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 535
 536 static void setup_signal_handling(void)
 537 {
 538         signal_pipe = para_signal_init();
 539         para_install_sighandler(SIGINT);
 540         para_install_sighandler(SIGTERM);
 541         para_install_sighandler(SIGCHLD);
 542         para_install_sighandler(SIGWINCH);
 543         para_install_sighandler(SIGUSR1);
 544 }
 545
 546 /* kill every process in the process group and exit */
 547 __noreturn static void kill_pg_and_die(int ret)
 548 {
 549         para_sigaction(SIGTERM, SIG_IGN);
 550         kill(0, SIGTERM);
 551         exit(ret);
 552 }
 553
 554 static void shutdown_curses(void)
 555 {
 556         def_prog_mode();
 557         endwin();
 558 }
 559
 560 __noreturn static void finish(int ret)
 561 {
 562         shutdown_curses();
 563         kill_pg_and_die(ret);
 564 }
 565
 566 /*
 567  * exit curses and print given message to stdout/stderr
 568  */
 569 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 570 {
 571         va_list argp;
 572         FILE *outfd = ret? stderr: stdout;
 573
 574         shutdown_curses();
 575         va_start(argp, fmt);
 576         vfprintf(outfd, fmt, argp);
 577         va_end(argp);
 578         kill_pg_and_die(ret);
 579 }
 580
 581 /*
 582  * init all windows
 583  */
 584 static void init_wins(int top_lines)
 585 {
 586         int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
 587                 in_y = LINES - 1, sep_y = top_lines;
 588
 589         top.lines = top_lines;
 590         bot.lines = LINES - top.lines - 3;
 591         sb.lines = in.lines = sep.lines = 1;
 592
 593         top.cols = bot.cols = sb.cols = in.cols = sep.cols = COLS;
 594
 595         assume_default_colors(theme.default_fg, theme.default_bg);
 596         if (top.win) {
 597                 wresize(top.win, top.lines, top.cols);
 598                 mvwin(top.win, top_y, 0);
 599
 600                 wresize(sb.win, sb.lines, sb.cols);
 601                 mvwin(sb.win, sb_y, 0);
 602
 603                 wresize(sep.win, sep.lines, sep.cols);
 604                 mvwin(sep.win, sep_y, 0);
 605
 606                 wresize(bot.win, bot.lines, bot.cols);
 607                 mvwin(bot.win, bot_y, 0);
 608
 609                 wresize(in.win, in.lines, in.cols);
 610                 mvwin(in.win, in_y, 0);
 611         } else {
 612                 sep.win = newwin(sep.lines, sep.cols, sep_y, 0);
 613                 top.win = newwin(top.lines, top.cols, top_y, 0);
 614                 bot.win = newwin(bot.lines, bot.cols, bot_y, 0);
 615                 sb.win = newwin(sb.lines, sb.cols, sb_y, 0);
 616                 in.win = newwin(in.lines, in.cols, in_y, 0);
 617                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 618                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 619                 wclear(bot.win);
 620                 wclear(sb.win);
 621                 wclear(in.win);
 622                 scrollok(bot.win, 1);
 623                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 624                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 625                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 626                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 627                 nodelay(top.win, 1);
 628                 nodelay(bot.win, 1);
 629                 nodelay(sb.win, 1);
 630                 nodelay(in.win, 0);
 631
 632                 keypad(top.win, 1);
 633                 keypad(bot.win, 1);
 634                 keypad(sb.win, 1);
 635                 keypad(in.win, 1);
 636         }
 637         wmove(sep.win, 0, 0);
 638         whline(sep.win, theme.sep_char, COLS);
 639         wclear(top.win);
 640         //wclear(bot.win);
 641         wnoutrefresh(top.win);
 642         wnoutrefresh(bot.win);
 643         print_status_bar();
 644         wnoutrefresh(sb.win);
 645         wnoutrefresh(in.win);
 646         wnoutrefresh(sep.win);
 647         doupdate();
 648 }
 649
 650 /*
 651  * Print stat item #i to curses window
 652  */
 653 static void print_stat_item(int i)
 654 {
 655         char *tmp;
 656         struct stat_item_data d = theme.data[i];
 657         char *c = stat_content[i];
 658
 659         if (!curses_active() || !d.len || !c)
 660                 return;
 661         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 662         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 663         wrefresh(top.win);
 664         wattron(top.win, COLOR_PAIR(i + 1));
 665         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 666         free(tmp);
 667         wrefresh(top.win);
 668 }
 669
 670 static int update_item(int item_num, char *buf)
 671 {
 672         char **c = stat_content + item_num;
 673
 674         free(*c);
 675         if (buf && buf[0])
 676                 goto dup;
 677         switch (item_num) {
 678         case SI_ARTIST:
 679                 *c = para_strdup("(artist tag not set)");
 680                 goto print;
 681         case SI_TITLE:
 682                 *c = para_strdup("(title tag not set)");
 683                 goto print;
 684         case SI_YEAR:
 685                 *c = para_strdup("????");
 686                 goto print;
 687         case SI_ALBUM:
 688                 *c = para_strdup("(album tag not set)");
 689                 goto print;
 690         case SI_COMMENT:
 691                 *c = para_strdup("(comment tag not set)");
 692                 goto print;
 693         }
 694 dup:
 695         *c = para_strdup(buf);
 696 print:
 697         print_stat_item(item_num);
 698         return 1;
 699 }
 700
 701 static int read_stat_pipe(fd_set *rfds)
 702 {
 703         static char *buf;
 704         static int bufsize, loaded;
 705         int ret, ret2;
 706         size_t sz;
 707
 708         if (stat_pipe < 0)
 709                 return 0;
 710         if (loaded >= bufsize) {
 711                 if (bufsize > 1000 * 1000) {
 712                         loaded = 0;
 713                         return 0;
 714                 }
 715                 bufsize += bufsize + 1000;
 716                 buf = para_realloc(buf, bufsize);
 717         }
 718         assert(loaded < bufsize);
 719         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 720                 rfds, &sz);
 721         loaded += sz;
 722         ret2 = for_each_stat_item(buf, loaded, update_item);
 723         if (ret < 0 || ret2 < 0) {
 724                 loaded = 0;
 725                 return ret2 < 0? ret2 : ret;
 726         }
 727         sz = ret2; /* what is left */
 728         if (sz > 0 && sz < loaded)
 729                 memmove(buf, buf + loaded - sz, sz);
 730         loaded = sz;
 731         return 1;
 732 }
 733
 734 static void print_all_items(void)
 735 {
 736         int i;
 737
 738         if (!curses_active())
 739                 return;
 740         FOR_EACH_STATUS_ITEM(i)
 741                 print_stat_item(i);
 742 }
 743
 744 static void clear_all_items(void)
 745 {
 746         int i;
 747
 748         FOR_EACH_STATUS_ITEM(i) {
 749                 free(stat_content[i]);
 750                 stat_content[i] = para_strdup("");
 751         }
 752 }
 753
 754 static void init_pair_or_die(short pair, short f, short b)
 755 {
 756         if (init_pair(pair, f, b) == ERR)
 757                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 758 }
 759
 760 static void init_colors_or_die(void)
 761 {
 762         int i;
 763
 764         if (!has_colors())
 765                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 766         if (start_color() == ERR)
 767                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 768         FOR_EACH_STATUS_ITEM(i)
 769                 if (theme.data[i].len)
 770                         init_pair_or_die(i + 1, theme.data[i].fg,
 771                                 theme.data[i].bg);
 772         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 773         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 774         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 775         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 776         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 777         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 778         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 779         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 780 }
 781
 782 /* (Re-)initialize the curses library. */
 783 static void init_curses(void)
 784 {
 785         if (curses_active())
 786                 return;
 787         if (top.win && refresh() == ERR) /* refresh is really needed */
 788                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 789         if (LINES < theme.lines_min || COLS < theme.cols_min)
 790                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 791                         " (need at least %dx%d)\n", COLS, LINES,
 792                         theme.cols_min, theme.lines_min);
 793         curs_set(0); /* make cursor invisible, ignore errors */
 794         nonl(); /* do not NL->CR/NL on output, always returns OK */
 795         /* don't echo input */
 796         if (noecho() == ERR)
 797                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 798         /* take input chars one at a time, no wait for \n */
 799         if (cbreak() == ERR)
 800                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 801         init_colors_or_die();
 802         clear(); /* ignore non-fatal errors */
 803         init_wins(theme.top_lines_default);
 804         print_all_items();
 805         // noecho(); /* don't echo input */
 806 }
 807
 808 static void check_sigchld(void)
 809 {
 810         int ret;
 811         pid_t pid;
 812
 813 reap_next_child:
 814         ret = para_reap_child(&pid);
 815         if (ret <= 0)
 816                 return;
 817         if (pid == cmd_pid)
 818                 cmd_pid = 0;
 819         goto reap_next_child;
 820 }
 821
 822 /*
 823  * This sucker modifies its first argument. *handler and *arg are
 824  * pointers to 0-terminated strings (inside line). Crap.
 825  */
 826 static int split_key_map(char *line, char **handler, char **arg)
 827 {
 828         if (!(*handler = strchr(line + 1, ':')))
 829                 goto err_out;
 830         **handler = '\0';
 831         (*handler)++;
 832         if (!(*arg = strchr(*handler, ':')))
 833                 goto err_out;
 834         **arg = '\0';
 835         (*arg)++;
 836         return 1;
 837 err_out:
 838         return 0;
 839 }
 840
 841 static int check_key_map_args(void)
 842 {
 843         char *s;
 844         int i, ret = -1;
 845         char *tmp = NULL, *handler, *arg;
 846
 847         for (i = 0; i < conf.key_map_given; ++i) {
 848                 s = conf.key_map_arg[i];
 849                 if (!(*s))
 850                         goto out;
 851                 free(tmp);
 852                 tmp = para_strdup(s);
 853                 if (!split_key_map(tmp, &handler, &arg))
 854                         goto out;
 855                 if (strlen(handler) != 1)
 856                         goto out;
 857                 if (*handler != 'x'
 858                         && *handler != 'd'
 859                         && *handler != 'i'
 860                         && *handler != 'p')
 861                         goto out;
 862                 if (*handler != 'i')
 863                         continue;
 864                 if (find_cmd_byname(arg) < 0)
 865                         goto out;
 866         }
 867         ret = 0;
 868 out:
 869         free(tmp);
 870         return ret;
 871 }
 872
 873 /*
 874  * React to various signal-related events
 875  */
 876 static void handle_signal(int sig)
 877 {
 878         switch (sig) {
 879         case SIGTERM:
 880                 msg_n_exit(EXIT_FAILURE,
 881                         "only the good die young (caught SIGTERM))\n");
 882                 return;
 883         case SIGWINCH:
 884                 if (curses_active()) {
 885                         shutdown_curses();
 886                         init_curses();
 887                         redraw_bot_win();
 888                 }
 889                 return;
 890         case SIGINT:
 891                 PARA_WARNING_LOG("caught SIGINT, reset\n");
 892                 /* Nothing to do. SIGINT killed our child which gets noticed
 893                  * by do_select and resets everything.
 894                  */
 895                 return;
 896         case SIGUSR1:
 897                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
 898                 com_reread_conf();
 899                 return;
 900         case SIGCHLD:
 901                 check_sigchld();
 902                 return;
 903         }
 904 }
 905
 906 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
 907 {
 908         static struct timeval next_exec, atm, diff;
 909         int ret, fds[3] = {0, 1, 0};
 910         pid_t pid;
 911
 912         if (stat_pipe >= 0)
 913                 goto success;
 914         /* Avoid busy loop */
 915         gettimeofday(&atm, NULL);
 916         if (tv_diff(&next_exec, &atm, &diff) > 0) {
 917                 if (tv_diff(&diff, tv, NULL) < 0)
 918                         *tv = diff;
 919                 return;
 920         }
 921         next_exec.tv_sec = atm.tv_sec + 2;
 922         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 923         if (ret < 0)
 924                 return;
 925         ret = mark_fd_nonblocking(fds[1]);
 926         if (ret < 0) {
 927                 close(fds[1]);
 928                 return;
 929         }
 930         stat_pipe = fds[1];
 931 success:
 932         para_fd_set(stat_pipe, rfds, max_fileno);
 933 }
 934
 935 #define COMMAND_BUF_SIZE 32768
 936
 937 /*
 938  * This is the core select loop. Besides the (internal) signal
 939  * pipe, the following other fds are checked according to the mode:
 940  *
 941  * GETCH_MODE: check stdin, return when key is pressed
 942  *
 943  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 944  * stdout and stderr or when any key is pressed.
 945  *
 946  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 947  * is running. During that time curses is disabled.  Returns when
 948  * cmd_pid == 0.
 949  */
 950 static int do_select(int mode)
 951 {
 952         fd_set rfds;
 953         int ret, i, max_fileno;
 954         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 955         int cbo[2] = {0, 0}; /* command buf offsets */
 956         struct timeval tv;
 957         unsigned flags[2] = {0, 0}; /* for for_each_line() */
 958
 959 repeat:
 960         tv.tv_sec = conf.timeout_arg  / 1000;
 961         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 962 //      ret = refresh_status();
 963         FD_ZERO(&rfds);
 964         max_fileno = 0;
 965         status_pre_select(&rfds, &max_fileno, &tv);
 966         /* signal pipe */
 967         para_fd_set(signal_pipe, &rfds, &max_fileno);
 968         /* command pipe only for COMMAND_MODE */
 969         if (mode == COMMAND_MODE) {
 970                 if (command_fds[0] >= 0)
 971                         para_fd_set(command_fds[0], &rfds, &max_fileno);
 972                 if (command_fds[1] >= 0)
 973                         para_fd_set(command_fds[1], &rfds, &max_fileno);
 974         }
 975         if (mode == GETCH_MODE || mode == COMMAND_MODE)
 976                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
 977         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 978         if (ret <= 0)
 979                 goto check_return; /* skip fd checks */
 980         /* signals */
 981         ret = para_next_signal(&rfds);
 982         if (ret > 0)
 983                 handle_signal(ret);
 984         /* read command pipe if ready */
 985         if (mode == COMMAND_MODE) {
 986                 for (i = 0; i < 2; i++) {
 987                         size_t sz;
 988                         if (command_fds[i] < 0)
 989                                 continue;
 990                         ret = read_nonblock(command_fds[i],
 991                                 command_buf[i] + cbo[i],
 992                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
 993                         cbo[i] += sz;
 994                         sz = cbo[i];
 995                         cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
 996                                 add_output_line, &i);
 997                         if (sz != cbo[i]) { /* at least one line found */
 998                                 wrefresh(bot.win);
 999                                 flags[i] = 0;
1000                         }
1001                         if (ret < 0) {
1002                                 PARA_NOTICE_LOG("closing command fd %d: %s\n",
1003                                         i, para_strerror(-ret));
1004                                 close(command_fds[i]);
1005                                 command_fds[i] = -1;
1006                                 flags[i] = 0;
1007                                 cbo[i] = 0;
1008                                 if (command_fds[!i] < 0) /* both fds closed */
1009                                         return 0;
1010                         }
1011                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1012                                 PARA_NOTICE_LOG("discarding overlong line\n");
1013                                 cbo[i] = 0;
1014                                 flags[i] = FELF_DISCARD_FIRST;
1015                         }
1016                 }
1017         }
1018         ret = read_stat_pipe(&rfds);
1019         if (ret < 0) {
1020                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1021                 close(stat_pipe);
1022                 stat_pipe = -1;
1023                 clear_all_items();
1024                 free(stat_content[SI_BASENAME]);
1025                 stat_content[SI_BASENAME] =
1026                         para_strdup("stat command terminated!?");
1027                 print_all_items();
1028         }
1029 check_return:
1030         switch (mode) {
1031         case COMMAND_MODE:
1032                 ret = wgetch(top.win);
1033                 if (ret != ERR && ret != KEY_RESIZE) {
1034                         if (cmd_pid)
1035                                 kill(cmd_pid, SIGTERM);
1036                         return -1;
1037                 }
1038                 break;
1039         case GETCH_MODE:
1040                 ret = wgetch(top.win);
1041                 if (ret != ERR && ret != KEY_RESIZE)
1042                         return ret;
1043                 break;
1044         case EXTERNAL_MODE:
1045                 if (cmd_pid == 0)
1046                         return 0;
1047         }
1048         goto repeat;
1049 }
1050
1051 /* read from command pipe and print data to bot window */
1052 static void exec_and_display_cmd(const char *cmd)
1053 {
1054         int ret, fds[3] = {0, 1, 1};
1055
1056         outputf(COLOR_COMMAND, "%s", cmd);
1057         ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1058         if (ret < 0)
1059                 return;
1060         ret = mark_fd_nonblocking(fds[1]);
1061         if (ret < 0)
1062                 goto fail;
1063         ret = mark_fd_nonblocking(fds[2]);
1064         if (ret < 0)
1065                 goto fail;
1066         command_fds[0] = fds[1];
1067         command_fds[1] = fds[2];
1068         if (do_select(COMMAND_MODE) >= 0)
1069                 PARA_INFO_LOG("command complete\n");
1070         else
1071                 PARA_NOTICE_LOG("command aborted\n");
1072         print_in_bar(COLOR_MSG, " ");
1073         return;
1074 fail:
1075         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1076         close(command_fds[0]);
1077         close(command_fds[1]);
1078 }
1079
1080 static void para_cmd(char *cmd)
1081 {
1082         char *c;
1083
1084         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1085         c = make_message(BINDIR "/para_client -- %s", cmd);
1086         exec_and_display_cmd(c);
1087         free(c);
1088 }
1089
1090 static void display_cmd(char *cmd)
1091 {
1092         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1093         exec_and_display_cmd(cmd);
1094 }
1095
1096 /*
1097  * shutdown curses and stat pipe before executing external commands
1098  */
1099 static void external_cmd(char *cmd)
1100 {
1101         int fds[3] = {-1, -1, -1};
1102
1103         if (cmd_pid)
1104                 return;
1105         shutdown_curses();
1106         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1107                 return;
1108         do_select(EXTERNAL_MODE);
1109         init_curses();
1110 }
1111
1112 static void print_scroll_msg(void)
1113 {
1114         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1115         int first_rbe = first_visible_rbe(&lines_total);
1116
1117         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1118                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1119 }
1120
1121 static void com_scroll_top(void)
1122 {
1123         int i = RINGBUFFER_SIZE - 1;
1124         unsigned lines = 0;
1125
1126         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1127                 i--;
1128         /* i is oldest entry */
1129         for (; lines < bot.lines && i >= 0; i--) {
1130                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1131                 if (!rbe)
1132                         break;
1133                 lines += NUM_LINES(rbe->len);
1134         }
1135         i++;
1136         if (lines > 0 && scroll_position != i) {
1137                 scroll_position = i;
1138                 redraw_bot_win();
1139                 print_scroll_msg();
1140                 return;
1141         }
1142         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1143 }
1144
1145 static void com_cancel_scrolling(void)
1146 {
1147
1148         if (scroll_position == 0) {
1149                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1150                 return;
1151         }
1152         scroll_position = 0;
1153         redraw_bot_win();
1154 }
1155
1156 static void com_page_down(void)
1157 {
1158         unsigned lines = 0;
1159         int i = scroll_position;
1160
1161         while (lines < bot.lines && --i > 0) {
1162                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1163                 if (!rbe)
1164                         break;
1165                 lines += NUM_LINES(rbe->len);
1166         }
1167         if (lines) {
1168                 scroll_position = i;
1169                 redraw_bot_win();
1170                 print_scroll_msg();
1171                 return;
1172         }
1173         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1174 }
1175
1176 static void com_page_up(void)
1177 {
1178         unsigned lines;
1179         int fvr = first_visible_rbe(&lines);
1180
1181         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1182                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1183                 return;
1184         }
1185         scroll_position = fvr + 1;
1186         for (; scroll_position > 0; scroll_position--) {
1187                 first_visible_rbe(&lines);
1188                 if (lines == bot.lines)
1189                         break;
1190         }
1191         redraw_bot_win();
1192         print_scroll_msg();
1193 }
1194
1195 static void com_scroll_down(void)
1196 {
1197         struct rb_entry *rbe;
1198         int rbe_lines;
1199
1200         if (!scroll_position) {
1201                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1202                 return;
1203         }
1204         scroll_position--;
1205         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1206         rbe_lines = NUM_LINES(rbe->len);
1207         wscrl(bot.win, rbe_lines);
1208         wmove(bot.win, bot.lines - rbe_lines, 0);
1209         wattron(bot.win, COLOR_PAIR(rbe->color));
1210         waddstr(bot.win, rbe->msg);
1211         wrefresh(bot.win);
1212         print_scroll_msg();
1213 }
1214
1215 static void com_scroll_up(void)
1216 {
1217         struct rb_entry *rbe = NULL;
1218         unsigned lines;
1219         int i, first_rbe, num_scroll;
1220
1221         /* the entry that is going to vanish */
1222         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1223         if (!rbe)
1224                 goto err_out;
1225         num_scroll = NUM_LINES(rbe->len);
1226         first_rbe = first_visible_rbe(&lines);
1227         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1228                 goto err_out;
1229         scroll_position++;
1230         wscrl(bot.win, -num_scroll);
1231         i = draw_top_rbe(&lines);
1232         if (i < 0)
1233                 goto err_out;
1234         while (i > 0 && lines < num_scroll) {
1235                 int rbe_lines;
1236                 rbe = ringbuffer_get(bot_win_rb, --i);
1237                 if (!rbe)
1238                         break;
1239                 rbe_lines = NUM_LINES(rbe->len);
1240                 lines += rbe_lines;
1241                 wattron(bot.win, COLOR_PAIR(rbe->color));
1242                 waddstr(bot.win, "\n");
1243                 waddstr(bot.win, rbe->msg);
1244                 if (!i)
1245                         break;
1246                 i--;
1247         }
1248         wrefresh(bot.win);
1249         print_scroll_msg();
1250         return;
1251 err_out:
1252         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1253 }
1254
1255 static void com_ll_decr(void)
1256 {
1257         if (loglevel <= LL_DEBUG) {
1258                 print_in_bar(COLOR_ERRMSG,
1259                         "loglevel already at maximal verbosity\n");
1260                 return;
1261         }
1262         loglevel--;
1263         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1264 }
1265
1266 static void com_ll_incr(void)
1267 {
1268         if (loglevel >= LL_EMERG) {
1269                 print_in_bar(COLOR_ERRMSG,
1270                         "loglevel already at minimal verbosity\n");
1271                 return;
1272         }
1273         loglevel++;
1274         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1275 }
1276
1277 /*
1278  * reread configuration, terminate on errors
1279  */
1280 static void com_reread_conf(void)
1281 {
1282         char *cf = configfile_exists();
1283         struct gui_cmdline_parser_params params = {
1284                 .override = 1,
1285                 .initialize = 1,
1286                 .check_required = 0,
1287                 .check_ambiguity = 0,
1288                 .print_errors = 0,
1289         };
1290
1291         if (!cf) {
1292                 PARA_WARNING_LOG("there is no configuration to read\n");
1293                 return;
1294         }
1295         PARA_INFO_LOG("rereading command line options and config file\n");
1296         /*
1297          * Despite .print_errors is set to 0, gengetopt will print to stderr
1298          * anyway, and exit on errors. So we have to shutdown curses first.
1299          */
1300         shutdown_curses();
1301         gui_cmdline_parser_config_file(cf, &conf, &params);
1302         init_curses();
1303         PARA_NOTICE_LOG("config file reloaded\n");
1304         if (check_key_map_args() < 0)
1305                 finish(EXIT_FAILURE);
1306 }
1307
1308 static void com_help(void)
1309 {
1310         int i;
1311
1312         for (i = 0; i < conf.key_map_given; ++i) {
1313                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1314                 const char *handler_text = "???", *desc = NULL;
1315
1316                 if (!split_key_map(tmp, &handler, &arg)) {
1317                         free(tmp);
1318                         return;
1319                 }
1320                 switch (*handler) {
1321                         case 'i':
1322                                 handler_text = "internal";
1323                                 desc = command_list[find_cmd_byname(arg)].description;
1324                                 break;
1325                         case 'x': handler_text = "external"; break;
1326                         case 'd': handler_text = "display "; break;
1327                         case 'p': handler_text = "para    "; break;
1328                 }
1329                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1330                         strlen(arg) < 8? "\t" : "",
1331                         desc? desc : "");
1332                 free(tmp);
1333         }
1334         for (i = 0; command_list[i].handler; i++) {
1335                 struct gui_command gc = command_list[i];
1336
1337                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1338                         strlen(gc.name) < 8? "\t" : "",
1339                         gc.description);
1340         }
1341         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1342                 "for more info");
1343 }
1344
1345 static void com_shrink_top_win(void)
1346 {
1347         if (top.lines <= theme.top_lines_min) {
1348                 PARA_WARNING_LOG("can not decrease top window\n");
1349                 return;
1350         }
1351         init_wins(top.lines - 1);
1352         print_all_items();
1353         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1354 }
1355
1356 static void com_enlarge_top_win(void)
1357 {
1358         if (bot.lines < 3) {
1359                 PARA_WARNING_LOG("can not increase top window\n");
1360                 return;
1361         }
1362         init_wins(top.lines + 1);
1363         print_all_items();
1364         print_in_bar(COLOR_MSG, "increased top window");
1365 }
1366
1367 static void com_version(void)
1368 {
1369         print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1370 }
1371
1372 __noreturn static void com_quit(void)
1373 {
1374         finish(0);
1375 }
1376
1377 static void com_refresh(void)
1378 {
1379         shutdown_curses();
1380         init_curses();
1381 }
1382
1383 static void com_next_theme(void)
1384 {
1385         theme_next(&theme);
1386         com_refresh();
1387 }
1388
1389 static void com_prev_theme(void)
1390 {
1391         theme_prev(&theme);
1392         com_refresh();
1393 }
1394
1395 static void handle_command(int c)
1396 {
1397         int i;
1398
1399         /* first check user-defined key bindings */
1400         for (i = 0; i < conf.key_map_given; ++i) {
1401                 char *tmp, *handler, *arg;
1402
1403                 tmp = para_strdup(conf.key_map_arg[i]);
1404                 if (!split_key_map(tmp, &handler, &arg)) {
1405                         free(tmp);
1406                         return;
1407                 }
1408                 if (strcmp(tmp, km_keyname(c))) {
1409                         free(tmp);
1410                         continue;
1411                 }
1412                 if (*handler == 'd')
1413                         display_cmd(arg);
1414                 else if (*handler == 'x')
1415                         external_cmd(arg);
1416                 else if (*handler == 'p')
1417                         para_cmd(arg);
1418                 else if (*handler == 'i') {
1419                         int num = find_cmd_byname(arg);
1420                         if (num >= 0)
1421                                 command_list[num].handler();
1422                 }
1423                 free(tmp);
1424                 return;
1425         }
1426         /* not found, check internal key bindings */
1427         for (i = 0; command_list[i].handler; i++) {
1428                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1429                         command_list[i].handler();
1430                         return;
1431                 }
1432         }
1433         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1434                 km_keyname(c));
1435 }
1436
1437 __noreturn static void print_help_and_die(void)
1438 {
1439         struct ggo_help h = DEFINE_GGO_HELP(gui);
1440         bool d = conf.detailed_help_given;
1441
1442         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1443         exit(0);
1444 }
1445
1446 int main(int argc, char *argv[])
1447 {
1448         int ret;
1449         char *cf;
1450
1451         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1452         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1453         version_handle_flag("gui", conf.version_given);
1454         if (conf.help_given || conf.detailed_help_given)
1455                 print_help_and_die();
1456         cf = configfile_exists();
1457         if (!cf && conf.config_file_given)
1458                 msg_n_exit(EXIT_FAILURE, "can not read config file %s\n",
1459                         conf.config_file_arg);
1460         if (cf) {
1461                 struct gui_cmdline_parser_params params = {
1462                         .override = 0,
1463                         .initialize = 0,
1464                         .check_required = 0,
1465                         .check_ambiguity = 0,
1466                         .print_errors = 1,
1467                 };
1468                 gui_cmdline_parser_config_file(cf, &conf, &params);
1469                 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1470         }
1471         if (check_key_map_args() < 0)
1472                 msg_n_exit(EXIT_FAILURE, "invalid key map\n");
1473         theme_init(conf.theme_arg, &theme);
1474         setup_signal_handling();
1475         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1476         setlocale(LC_CTYPE, "");
1477         initscr(); /* needed only once, always successful */
1478         init_curses();
1479         for (;;) {
1480                 print_status_bar();
1481                 ret = do_select(GETCH_MODE);
1482                 if (!ret)
1483                         continue;
1484                 print_in_bar(COLOR_MSG, " ");
1485                 handle_command(ret);
1486         }
1487 }