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 int _argc;
  88 static char **_argv;
  89
  90 static void com_help(void);
  91 static void com_reread_conf(void);
  92 static void com_enlarge_top_win(void);
  93 static void com_shrink_top_win(void);
  94 static void com_version(void);
  95 __noreturn static void com_quit(void);
  96 static void com_refresh(void);
  97 static void com_ll_incr(void);
  98 static void com_ll_decr(void);
  99 static void com_prev_theme(void);
 100 static void com_next_theme(void);
 101 static void com_scroll_up(void);
 102 static void com_scroll_down(void);
 103 static void com_page_up(void);
 104 static void com_page_down(void);
 105 static void com_cancel_scrolling(void);
 106 static void com_scroll_top(void);
 107
 108 static struct gui_command command_list[] = {
 109         {
 110                 .key = "?",
 111                 .name = "help",
 112                 .description = "print help",
 113                 .handler = com_help
 114         }, {
 115                 .key = "+",
 116                 .name = "enlarge_win",
 117                 .description = "enlarge the top window",
 118                 .handler = com_enlarge_top_win
 119         }, {
 120                 .key = "-",
 121                 .name = "shrink_win",
 122                 .description = "shrink the top window",
 123                 .handler = com_shrink_top_win
 124         }, {
 125                 .key = "r",
 126                 .name = "reread_conf",
 127                 .description = "reread configuration file",
 128                 .handler = com_reread_conf
 129         }, {
 130                 .key = "q",
 131                 .name = "quit",
 132                 .description = "exit para_gui",
 133                 .handler = com_quit
 134         }, {
 135                 .key = "^L",
 136                 .name = "refresh",
 137                 .description = "redraw the screen",
 138                 .handler = com_refresh
 139         }, {
 140                 .key = ".",
 141                 .name = "next_theme",
 142                 .description = "switch to next theme",
 143                 .handler = com_next_theme
 144         }, {
 145                 .key = ",",
 146                 .name = "prev_theme",
 147                 .description = "switch to previous stream",
 148                 .handler = com_prev_theme
 149         }, {
 150                 .key = ">",
 151                 .name = "ll_incr",
 152                 .description = "increase loglevel (decreases verbosity)",
 153                 .handler = com_ll_incr
 154         }, {
 155                 .key = "<",
 156                 .name = "ll_decr",
 157                 .description = "decrease loglevel (increases verbosity)",
 158                 .handler = com_ll_decr
 159         }, {
 160                 .key = "V",
 161                 .name = "version",
 162                 .description = "show the para_gui version",
 163                 .handler = com_version
 164         }, {
 165                 .key = "<up>",
 166                 .name = "scroll_up",
 167                 .description = "scroll up one line",
 168                 .handler = com_scroll_up
 169         }, {
 170                 .key = "<down>",
 171                 .name = "scroll_down",
 172                 .description = "scroll down one line",
 173                 .handler = com_scroll_down
 174         }, {
 175                 .key = "<ppage>",
 176                 .name = "page_up",
 177                 .description = "scroll up one page",
 178                 .handler = com_page_up
 179         }, {
 180                 .key = "<npage>",
 181                 .name = "page_down",
 182                 .description = "scroll down one page",
 183                 .handler = com_page_down
 184         }, {
 185                 .key = "<home>",
 186                 .name = "scroll_top",
 187                 .description = "scroll to top of buffer",
 188                 .handler = com_scroll_top
 189         }, {
 190                 .key = "<end>",
 191                 .name = "cancel_scroll",
 192                 .description = "deactivate scroll mode",
 193                 .handler = com_cancel_scrolling
 194         }, {
 195                 .handler = NULL
 196         }
 197 };
 198
 199 static int find_cmd_byname(char *name)
 200 {
 201         int i;
 202
 203         for (i = 0; command_list[i].handler; i++)
 204                 if (!strcmp(command_list[i].name, name))
 205                         return i;
 206         return -1;
 207 }
 208
 209 /* isendwin() returns false before initscr() was called */
 210 static bool curses_active(void)
 211 {
 212         return top.win && !isendwin();
 213 }
 214
 215 /* taken from mutt */
 216 static char *km_keyname(int c)
 217 {
 218         static char buf[10];
 219
 220         if (c == KEY_UP) {
 221                 sprintf(buf, "<up>");
 222                 return buf;
 223         }
 224         if (c == KEY_DOWN) {
 225                 sprintf(buf, "<down>");
 226                 return buf;
 227         }
 228         if (c == KEY_LEFT) {
 229                 sprintf(buf, "<left>");
 230                 return buf;
 231         }
 232         if (c == KEY_RIGHT) {
 233                 sprintf(buf, "<right>");
 234                 return buf;
 235         }
 236         if (c == KEY_NPAGE) {
 237                 sprintf(buf, "<npage>");
 238                 return buf;
 239         }
 240         if (c == KEY_PPAGE) {
 241                 sprintf(buf, "<ppage>");
 242                 return buf;
 243         }
 244         if (c == KEY_HOME) {
 245                 sprintf(buf, "<home>");
 246                 return buf;
 247         }
 248         if (c == KEY_END) {
 249                 sprintf(buf, "<end>");
 250                 return buf;
 251         }
 252         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 253                 if (c < 0)
 254                         c += 256;
 255                 if (c < 128) {
 256                         buf[0] = '^';
 257                         buf[1] = (c + '@') & 0x7f;
 258                         buf[2] = 0;
 259                 } else
 260                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 261                                 (c >> 3) & 7, c & 7);
 262         } else if (c >= KEY_F0 && c < KEY_F(256))
 263                 sprintf(buf, "<F%d>", c - KEY_F0);
 264         else if (isprint(c))
 265                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 266         else
 267                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 268         return buf;
 269 }
 270
 271 static char *configfile_exists(void)
 272 {
 273         static char *config_file;
 274         char *tmp;
 275
 276         if (!conf.config_file_given) {
 277                 if (!config_file) {
 278                         char *home = para_homedir();
 279                         config_file = make_message("%s/.paraslash/gui.conf",
 280                                 home);
 281                         free(home);
 282                 }
 283                 tmp = config_file;
 284         } else
 285                 tmp = conf.config_file_arg;
 286         return file_exists(tmp)? tmp: NULL;
 287 }
 288
 289 /* Print given number of spaces to curses window. */
 290 static void add_spaces(WINDOW* win, unsigned int num)
 291 {
 292         char space[] = "                                ";
 293         unsigned sz = sizeof(space) - 1; /* number of spaces */
 294
 295         while (num >= sz)  {
 296                 waddstr(win, space);
 297                 num -= sz;
 298         }
 299         if (num > 0) {
 300                 assert(num < sz);
 301                 space[num] = '\0';
 302                 waddstr(win, space);
 303         }
 304 }
 305
 306 /*
 307  * print aligned string to curses window. This function always prints
 308  * exactly len chars.
 309  */
 310 static int align_str(WINDOW* win, char *str, unsigned int len,
 311                 unsigned int align)
 312 {
 313         int ret, i, num; /* of spaces */
 314         size_t width;
 315
 316         if (!win || !str)
 317                 return 0;
 318         ret = strwidth(str, &width);
 319         if (ret < 0) {
 320                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 321                 width = 0;
 322                 str[0] = '\0';
 323         }
 324         num = len - width;
 325         if (num < 0) {
 326                 str[len] = '\0';
 327                 num = 0;
 328         }
 329         /* replace control characters by spaces */
 330         for (i = 0; i < len && str[i]; i++) {
 331                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 332                         str[i] = ' ';
 333         }
 334         if (align == LEFT) {
 335                 waddstr(win, str);
 336                 add_spaces(win, num);
 337         } else if (align == RIGHT) {
 338                 add_spaces(win, num);
 339                 waddstr(win, str);
 340         } else {
 341                 add_spaces(win, num / 2);
 342                 waddstr(win, str[0]? str: "");
 343                 add_spaces(win, num - num / 2);
 344         }
 345         return 1;
 346 }
 347
 348 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 349 {
 350         char *msg;
 351         va_list ap;
 352
 353         if (!curses_active())
 354                 return;
 355         wattron(in.win, COLOR_PAIR(color));
 356         va_start(ap, fmt);
 357         xvasprintf(&msg, fmt, ap);
 358         va_end(ap);
 359         wmove(in.win, 0, 0);
 360         align_str(in.win, msg, in.cols, LEFT);
 361         free(msg);
 362         wrefresh(in.win);
 363 }
 364
 365 static void print_status_bar(void)
 366 {
 367         char *tmp;
 368
 369         tmp = para_strdup("para_gui " PACKAGE_VERSION " (hit ? for help)");
 370         wmove(sb.win, 0, 0);
 371         align_str(sb.win, tmp, sb.cols, CENTER);
 372         free(tmp);
 373 }
 374
 375 /*
 376  * get the number of the oldest rbe that is (partially) visible. On return,
 377  * lines contains the sum of the number of lines of all visible entries. If the
 378  * first one is only partially visible, lines is greater than bot.lines.
 379  */
 380 static int first_visible_rbe(unsigned *lines)
 381 {
 382         int i;
 383         *lines = 0;
 384         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 385                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 386                 int rbe_lines;
 387                 if (!rbe)
 388                         return i - 1;
 389 //              fprintf(stderr, "found: %s\n", rbe->msg);
 390                 rbe_lines = NUM_LINES(rbe->len);
 391                 if (rbe_lines > bot.lines)
 392                         return -1;
 393                 *lines += rbe_lines;
 394                 if (*lines >= bot.lines)
 395                         return i;
 396         }
 397         return RINGBUFFER_SIZE - 1;
 398 }
 399
 400 /*
 401 returns number of first visible rbe, *lines is the number of lines drawn.
 402  */
 403 static int draw_top_rbe(unsigned *lines)
 404 {
 405         int ret, fvr = first_visible_rbe(lines);
 406         struct rb_entry *rbe;
 407         size_t bytes_to_skip, cells_to_skip, width;
 408
 409         if (fvr < 0)
 410                 return -1;
 411         wmove(bot.win, 0, 0);
 412         rbe = ringbuffer_get(bot_win_rb, fvr);
 413         if (!rbe)
 414                 return -1;
 415         if (*lines > bot.lines) {
 416                 /* rbe is partially visible multi-line */
 417                 cells_to_skip = (*lines - bot.lines) * bot.cols;
 418                 ret = skip_cells(rbe->msg, cells_to_skip, &bytes_to_skip);
 419                 if (ret < 0)
 420                         return ret;
 421                 ret = strwidth(rbe->msg + bytes_to_skip, &width);
 422                 if (ret < 0)
 423                         return ret;
 424         } else {
 425                 bytes_to_skip = 0;
 426                 width = rbe->len;
 427         }
 428         wattron(bot.win, COLOR_PAIR(rbe->color));
 429         waddstr(bot.win, rbe->msg + bytes_to_skip);
 430         *lines = NUM_LINES(width);
 431         return fvr;
 432 }
 433
 434 static void redraw_bot_win(void)
 435 {
 436         unsigned lines;
 437         int i;
 438
 439         wmove(bot.win, 0, 0);
 440         wclear(bot.win);
 441         i = draw_top_rbe(&lines);
 442         if (i <= 0)
 443                 goto out;
 444         while (i > 0 && lines < bot.lines) {
 445                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 446                 if (!rbe) {
 447                         lines++;
 448                         waddstr(bot.win, "\n");
 449                         continue;
 450                 }
 451                 lines += NUM_LINES(rbe->len);
 452                 wattron(bot.win, COLOR_PAIR(rbe->color));
 453                 waddstr(bot.win, "\n");
 454                 waddstr(bot.win, rbe->msg);
 455         }
 456 out:
 457         wrefresh(bot.win);
 458 }
 459
 460 static void rb_add_entry(int color, char *msg)
 461 {
 462         struct rb_entry *old, *new;
 463         int x, y;
 464         size_t len;
 465
 466         if (strwidth(msg, &len) < 0)
 467                 return;
 468         new = para_malloc(sizeof(struct rb_entry));
 469         new->color = color;
 470         new->len = len;
 471         new->msg = msg;
 472         old = ringbuffer_add(bot_win_rb, new);
 473 //      fprintf(stderr, "added: %s\n", new->msg);
 474         if (old) {
 475                 free(old->msg);
 476                 free(old);
 477         }
 478         if (scroll_position) {
 479                 /* discard current scrolling, like xterm does */
 480                 scroll_position = 0;
 481                 redraw_bot_win();
 482                 return;
 483         }
 484         wattron(bot.win, COLOR_PAIR(color));
 485         getyx(bot.win, y, x);
 486         if (y || x)
 487                 waddstr(bot.win, "\n");
 488         waddstr(bot.win, msg);
 489 }
 490
 491 /*
 492  * print formated output to bot win and refresh
 493  */
 494 __printf_2_3 static void outputf(int color, const char* fmt,...)
 495 {
 496         char *msg;
 497         va_list ap;
 498
 499         if (!curses_active())
 500                 return;
 501         va_start(ap, fmt);
 502         xvasprintf(&msg, fmt, ap);
 503         va_end(ap);
 504         rb_add_entry(color, msg);
 505         wrefresh(bot.win);
 506 }
 507
 508 static int add_output_line(char *line, void *data)
 509 {
 510         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 511
 512         if (!curses_active())
 513                 return 1;
 514         rb_add_entry(color, para_strdup(line));
 515         return 1;
 516 }
 517
 518 static int loglevel;
 519
 520 static __printf_2_3 void curses_log(int ll, const char *fmt,...)
 521 {
 522         int color;
 523         char *msg;
 524         va_list ap;
 525         unsigned bytes;
 526
 527         if (ll < loglevel || !curses_active())
 528                 return;
 529         switch (ll) {
 530                 case LL_DEBUG:
 531                 case LL_INFO:
 532                 case LL_NOTICE:
 533                         color = COLOR_MSG;
 534                         break;
 535                 default:
 536                         color = COLOR_ERRMSG;
 537         }
 538         va_start(ap, fmt);
 539         bytes = xvasprintf(&msg, fmt, ap);
 540         va_end(ap);
 541         if (bytes > 0 && msg[bytes - 1] == '\n')
 542                 msg[bytes - 1] = '\0'; /* cut trailing newline */
 543         rb_add_entry(color, msg);
 544         wrefresh(bot.win);
 545 }
 546 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 547
 548 static void setup_signal_handling(void)
 549 {
 550         signal_pipe = para_signal_init();
 551         para_install_sighandler(SIGINT);
 552         para_install_sighandler(SIGTERM);
 553         para_install_sighandler(SIGCHLD);
 554         para_install_sighandler(SIGWINCH);
 555         para_install_sighandler(SIGUSR1);
 556 }
 557
 558 /* kill every process in the process group and exit */
 559 __noreturn static void kill_pg_and_die(int ret)
 560 {
 561         para_sigaction(SIGTERM, SIG_IGN);
 562         kill(0, SIGTERM);
 563         exit(ret);
 564 }
 565
 566 static void shutdown_curses(void)
 567 {
 568         def_prog_mode();
 569         endwin();
 570 }
 571
 572 __noreturn static void finish(int ret)
 573 {
 574         shutdown_curses();
 575         kill_pg_and_die(ret);
 576 }
 577
 578 /*
 579  * exit curses and print given message to stdout/stderr
 580  */
 581 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 582 {
 583         va_list argp;
 584         FILE *outfd = ret? stderr: stdout;
 585
 586         shutdown_curses();
 587         va_start(argp, fmt);
 588         vfprintf(outfd, fmt, argp);
 589         va_end(argp);
 590         kill_pg_and_die(ret);
 591 }
 592
 593 /*
 594  * init all windows
 595  */
 596 static void init_wins(int top_lines)
 597 {
 598         int top_y = 0, bot_y = top_lines + 1, sb_y = LINES - 2,
 599                 in_y = LINES - 1, sep_y = top_lines;
 600
 601         top.lines = top_lines;
 602         bot.lines = LINES - top.lines - 3;
 603         sb.lines = in.lines = sep.lines = 1;
 604
 605         top.cols = bot.cols = sb.cols = in.cols = sep.cols = COLS;
 606
 607         assume_default_colors(theme.default_fg, theme.default_bg);
 608         if (top.win) {
 609                 wresize(top.win, top.lines, top.cols);
 610                 mvwin(top.win, top_y, 0);
 611
 612                 wresize(sb.win, sb.lines, sb.cols);
 613                 mvwin(sb.win, sb_y, 0);
 614
 615                 wresize(sep.win, sep.lines, sep.cols);
 616                 mvwin(sep.win, sep_y, 0);
 617
 618                 wresize(bot.win, bot.lines, bot.cols);
 619                 mvwin(bot.win, bot_y, 0);
 620
 621                 wresize(in.win, in.lines, in.cols);
 622                 mvwin(in.win, in_y, 0);
 623         } else {
 624                 sep.win = newwin(sep.lines, sep.cols, sep_y, 0);
 625                 top.win = newwin(top.lines, top.cols, top_y, 0);
 626                 bot.win = newwin(bot.lines, bot.cols, bot_y, 0);
 627                 sb.win = newwin(sb.lines, sb.cols, sb_y, 0);
 628                 in.win = newwin(in.lines, in.cols, in_y, 0);
 629                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 630                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 631                 wclear(bot.win);
 632                 wclear(sb.win);
 633                 wclear(in.win);
 634                 scrollok(bot.win, 1);
 635                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 636                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 637                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 638                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 639                 nodelay(top.win, 1);
 640                 nodelay(bot.win, 1);
 641                 nodelay(sb.win, 1);
 642                 nodelay(in.win, 0);
 643
 644                 keypad(top.win, 1);
 645                 keypad(bot.win, 1);
 646                 keypad(sb.win, 1);
 647                 keypad(in.win, 1);
 648         }
 649         wmove(sep.win, 0, 0);
 650         whline(sep.win, theme.sep_char, COLS);
 651         wclear(top.win);
 652         //wclear(bot.win);
 653         wnoutrefresh(top.win);
 654         wnoutrefresh(bot.win);
 655         print_status_bar();
 656         wnoutrefresh(sb.win);
 657         wnoutrefresh(in.win);
 658         wnoutrefresh(sep.win);
 659         doupdate();
 660 }
 661
 662 /*
 663  * Print stat item #i to curses window
 664  */
 665 static void print_stat_item(int i)
 666 {
 667         char *tmp;
 668         struct stat_item_data d = theme.data[i];
 669         char *c = stat_content[i];
 670
 671         if (!curses_active() || !d.len || !c)
 672                 return;
 673         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 674         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 675         wrefresh(top.win);
 676         wattron(top.win, COLOR_PAIR(i + 1));
 677         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 678         free(tmp);
 679         wrefresh(top.win);
 680 }
 681
 682 static int update_item(int item_num, char *buf)
 683 {
 684         char **c = stat_content + item_num;
 685
 686         free(*c);
 687         if (buf && buf[0])
 688                 goto dup;
 689         switch (item_num) {
 690         case SI_ARTIST:
 691                 *c = para_strdup("(artist tag not set)");
 692                 goto print;
 693         case SI_TITLE:
 694                 *c = para_strdup("(title tag not set)");
 695                 goto print;
 696         case SI_YEAR:
 697                 *c = para_strdup("????");
 698                 goto print;
 699         case SI_ALBUM:
 700                 *c = para_strdup("(album tag not set)");
 701                 goto print;
 702         case SI_COMMENT:
 703                 *c = para_strdup("(comment tag not set)");
 704                 goto print;
 705         }
 706 dup:
 707         *c = para_strdup(buf);
 708 print:
 709         print_stat_item(item_num);
 710         return 1;
 711 }
 712
 713 static int read_stat_pipe(fd_set *rfds)
 714 {
 715         static char *buf;
 716         static int bufsize, loaded;
 717         int ret, ret2;
 718         size_t sz;
 719
 720         if (stat_pipe < 0)
 721                 return 0;
 722         if (loaded >= bufsize) {
 723                 if (bufsize > 1000 * 1000) {
 724                         loaded = 0;
 725                         return 0;
 726                 }
 727                 bufsize += bufsize + 1000;
 728                 buf = para_realloc(buf, bufsize);
 729         }
 730         assert(loaded < bufsize);
 731         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 732                 rfds, &sz);
 733         loaded += sz;
 734         ret2 = for_each_stat_item(buf, loaded, update_item);
 735         if (ret < 0 || ret2 < 0) {
 736                 loaded = 0;
 737                 return ret2 < 0? ret2 : ret;
 738         }
 739         sz = ret2; /* what is left */
 740         if (sz > 0 && sz < loaded)
 741                 memmove(buf, buf + loaded - sz, sz);
 742         loaded = sz;
 743         return 1;
 744 }
 745
 746 static void print_all_items(void)
 747 {
 748         int i;
 749
 750         if (!curses_active())
 751                 return;
 752         FOR_EACH_STATUS_ITEM(i)
 753                 print_stat_item(i);
 754 }
 755
 756 static void clear_all_items(void)
 757 {
 758         int i;
 759
 760         FOR_EACH_STATUS_ITEM(i) {
 761                 free(stat_content[i]);
 762                 stat_content[i] = para_strdup("");
 763         }
 764 }
 765
 766 static void init_pair_or_die(short pair, short f, short b)
 767 {
 768         if (init_pair(pair, f, b) == ERR)
 769                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 770 }
 771
 772 static void init_colors_or_die(void)
 773 {
 774         int i;
 775
 776         if (!has_colors())
 777                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 778         if (start_color() == ERR)
 779                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 780         FOR_EACH_STATUS_ITEM(i)
 781                 if (theme.data[i].len)
 782                         init_pair_or_die(i + 1, theme.data[i].fg,
 783                                 theme.data[i].bg);
 784         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 785         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 786         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 787         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 788         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 789         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 790         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 791         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 792 }
 793
 794 /* (Re-)initialize the curses library. */
 795 static void init_curses(void)
 796 {
 797         if (curses_active())
 798                 return;
 799         if (top.win && refresh() == ERR) /* refresh is really needed */
 800                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 801         if (LINES < theme.lines_min || COLS < theme.cols_min)
 802                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 803                         " (need at least %dx%d)\n", COLS, LINES,
 804                         theme.cols_min, theme.lines_min);
 805         curs_set(0); /* make cursor invisible, ignore errors */
 806         nonl(); /* do not NL->CR/NL on output, always returns OK */
 807         /* don't echo input */
 808         if (noecho() == ERR)
 809                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 810         /* take input chars one at a time, no wait for \n */
 811         if (cbreak() == ERR)
 812                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 813         init_colors_or_die();
 814         clear(); /* ignore non-fatal errors */
 815         init_wins(theme.top_lines_default);
 816         print_all_items();
 817         // noecho(); /* don't echo input */
 818 }
 819
 820 static void check_sigchld(void)
 821 {
 822         int ret;
 823         pid_t pid;
 824
 825 reap_next_child:
 826         ret = para_reap_child(&pid);
 827         if (ret <= 0)
 828                 return;
 829         if (pid == cmd_pid)
 830                 cmd_pid = 0;
 831         goto reap_next_child;
 832 }
 833
 834 /*
 835  * This sucker modifies its first argument. *handler and *arg are
 836  * pointers to 0-terminated strings (inside line). Crap.
 837  */
 838 static int split_key_map(char *line, char **handler, char **arg)
 839 {
 840         if (!(*handler = strchr(line + 1, ':')))
 841                 goto err_out;
 842         **handler = '\0';
 843         (*handler)++;
 844         if (!(*arg = strchr(*handler, ':')))
 845                 goto err_out;
 846         **arg = '\0';
 847         (*arg)++;
 848         return 1;
 849 err_out:
 850         return 0;
 851 }
 852
 853 static int check_key_map_args(void)
 854 {
 855         char *s;
 856         int i, ret = -1;
 857         char *tmp = NULL, *handler, *arg;
 858
 859         for (i = 0; i < conf.key_map_given; ++i) {
 860                 s = conf.key_map_arg[i];
 861                 if (!(*s))
 862                         goto out;
 863                 free(tmp);
 864                 tmp = para_strdup(s);
 865                 if (!split_key_map(tmp, &handler, &arg))
 866                         goto out;
 867                 if (strlen(handler) != 1)
 868                         goto out;
 869                 if (*handler != 'x'
 870                         && *handler != 'd'
 871                         && *handler != 'i'
 872                         && *handler != 'p')
 873                         goto out;
 874                 if (*handler != 'i')
 875                         continue;
 876                 if (find_cmd_byname(arg) < 0)
 877                         goto out;
 878         }
 879         ret = 0;
 880 out:
 881         free(tmp);
 882         return ret;
 883 }
 884
 885 /*
 886  * React to various signal-related events
 887  */
 888 static void handle_signal(int sig)
 889 {
 890         switch (sig) {
 891         case SIGTERM:
 892                 msg_n_exit(EXIT_FAILURE,
 893                         "only the good die young (caught SIGTERM))\n");
 894                 return;
 895         case SIGWINCH:
 896                 if (curses_active()) {
 897                         shutdown_curses();
 898                         init_curses();
 899                         redraw_bot_win();
 900                 }
 901                 return;
 902         case SIGINT:
 903                 PARA_WARNING_LOG("caught SIGINT, reset\n");
 904                 /* Nothing to do. SIGINT killed our child which gets noticed
 905                  * by do_select and resets everything.
 906                  */
 907                 return;
 908         case SIGUSR1:
 909                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration\n");
 910                 com_reread_conf();
 911                 return;
 912         case SIGCHLD:
 913                 check_sigchld();
 914                 return;
 915         }
 916 }
 917
 918 static void status_pre_select(fd_set *rfds, int *max_fileno, struct timeval *tv)
 919 {
 920         static struct timeval next_exec, atm, diff;
 921         int ret, fds[3] = {0, 1, 0};
 922         pid_t pid;
 923
 924         if (stat_pipe >= 0)
 925                 goto success;
 926         /* Avoid busy loop */
 927         gettimeofday(&atm, NULL);
 928         if (tv_diff(&next_exec, &atm, &diff) > 0) {
 929                 if (tv_diff(&diff, tv, NULL) < 0)
 930                         *tv = diff;
 931                 return;
 932         }
 933         next_exec.tv_sec = atm.tv_sec + 2;
 934         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 935         if (ret < 0)
 936                 return;
 937         ret = mark_fd_nonblocking(fds[1]);
 938         if (ret < 0) {
 939                 close(fds[1]);
 940                 return;
 941         }
 942         stat_pipe = fds[1];
 943 success:
 944         para_fd_set(stat_pipe, rfds, max_fileno);
 945 }
 946
 947 #define COMMAND_BUF_SIZE 32768
 948
 949 /*
 950  * This is the core select loop. Besides the (internal) signal
 951  * pipe, the following other fds are checked according to the mode:
 952  *
 953  * GETCH_MODE: check stdin, return when key is pressed
 954  *
 955  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 956  * stdout and stderr or when any key is pressed.
 957  *
 958  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 959  * is running. During that time curses is disabled.  Returns when
 960  * cmd_pid == 0.
 961  */
 962 static int do_select(int mode)
 963 {
 964         fd_set rfds;
 965         int ret, i, max_fileno;
 966         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 967         int cbo[2] = {0, 0}; /* command buf offsets */
 968         struct timeval tv;
 969         unsigned flags[2] = {0, 0}; /* for for_each_line() */
 970
 971 repeat:
 972         tv.tv_sec = conf.timeout_arg  / 1000;
 973         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 974 //      ret = refresh_status();
 975         FD_ZERO(&rfds);
 976         max_fileno = 0;
 977         status_pre_select(&rfds, &max_fileno, &tv);
 978         /* signal pipe */
 979         para_fd_set(signal_pipe, &rfds, &max_fileno);
 980         /* command pipe only for COMMAND_MODE */
 981         if (mode == COMMAND_MODE) {
 982                 if (command_fds[0] >= 0)
 983                         para_fd_set(command_fds[0], &rfds, &max_fileno);
 984                 if (command_fds[1] >= 0)
 985                         para_fd_set(command_fds[1], &rfds, &max_fileno);
 986         }
 987         if (mode == GETCH_MODE || mode == COMMAND_MODE)
 988                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
 989         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 990         if (ret <= 0)
 991                 goto check_return; /* skip fd checks */
 992         /* signals */
 993         ret = para_next_signal(&rfds);
 994         if (ret > 0)
 995                 handle_signal(ret);
 996         /* read command pipe if ready */
 997         if (mode == COMMAND_MODE) {
 998                 for (i = 0; i < 2; i++) {
 999                         size_t sz;
1000                         if (command_fds[i] < 0)
1001                                 continue;
1002                         ret = read_nonblock(command_fds[i],
1003                                 command_buf[i] + cbo[i],
1004                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1005                         cbo[i] += sz;
1006                         sz = cbo[i];
1007                         cbo[i] = for_each_line(flags[i], command_buf[i], cbo[i],
1008                                 add_output_line, &i);
1009                         if (sz != cbo[i]) { /* at least one line found */
1010                                 wrefresh(bot.win);
1011                                 flags[i] = 0;
1012                         }
1013                         if (ret < 0) {
1014                                 PARA_NOTICE_LOG("closing command fd %d: %s\n",
1015                                         i, para_strerror(-ret));
1016                                 close(command_fds[i]);
1017                                 command_fds[i] = -1;
1018                                 flags[i] = 0;
1019                                 cbo[i] = 0;
1020                                 if (command_fds[!i] < 0) /* both fds closed */
1021                                         return 0;
1022                         }
1023                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1024                                 PARA_NOTICE_LOG("discarding overlong line\n");
1025                                 cbo[i] = 0;
1026                                 flags[i] = FELF_DISCARD_FIRST;
1027                         }
1028                 }
1029         }
1030         ret = read_stat_pipe(&rfds);
1031         if (ret < 0) {
1032                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1033                 close(stat_pipe);
1034                 stat_pipe = -1;
1035                 clear_all_items();
1036                 free(stat_content[SI_BASENAME]);
1037                 stat_content[SI_BASENAME] =
1038                         para_strdup("stat command terminated!?");
1039                 print_all_items();
1040         }
1041 check_return:
1042         switch (mode) {
1043         case COMMAND_MODE:
1044                 ret = wgetch(top.win);
1045                 if (ret != ERR && ret != KEY_RESIZE) {
1046                         if (cmd_pid)
1047                                 kill(cmd_pid, SIGTERM);
1048                         return -1;
1049                 }
1050                 break;
1051         case GETCH_MODE:
1052                 ret = wgetch(top.win);
1053                 if (ret != ERR && ret != KEY_RESIZE)
1054                         return ret;
1055                 break;
1056         case EXTERNAL_MODE:
1057                 if (cmd_pid == 0)
1058                         return 0;
1059         }
1060         goto repeat;
1061 }
1062
1063 /* read from command pipe and print data to bot window */
1064 static void exec_and_display_cmd(const char *cmd)
1065 {
1066         int ret, fds[3] = {0, 1, 1};
1067
1068         outputf(COLOR_COMMAND, "%s", cmd);
1069         ret = para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1070         if (ret < 0)
1071                 return;
1072         ret = mark_fd_nonblocking(fds[1]);
1073         if (ret < 0)
1074                 goto fail;
1075         ret = mark_fd_nonblocking(fds[2]);
1076         if (ret < 0)
1077                 goto fail;
1078         command_fds[0] = fds[1];
1079         command_fds[1] = fds[2];
1080         if (do_select(COMMAND_MODE) >= 0)
1081                 PARA_INFO_LOG("command complete\n");
1082         else
1083                 PARA_NOTICE_LOG("command aborted\n");
1084         print_in_bar(COLOR_MSG, " ");
1085         return;
1086 fail:
1087         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1088         close(command_fds[0]);
1089         close(command_fds[1]);
1090 }
1091
1092 static void para_cmd(char *cmd)
1093 {
1094         char *c;
1095
1096         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1097         c = make_message(BINDIR "/para_client -- %s", cmd);
1098         exec_and_display_cmd(c);
1099         free(c);
1100 }
1101
1102 static void display_cmd(char *cmd)
1103 {
1104         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1105         exec_and_display_cmd(cmd);
1106 }
1107
1108 /*
1109  * shutdown curses and stat pipe before executing external commands
1110  */
1111 static void external_cmd(char *cmd)
1112 {
1113         int fds[3] = {-1, -1, -1};
1114
1115         if (cmd_pid)
1116                 return;
1117         shutdown_curses();
1118         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1119                 return;
1120         do_select(EXTERNAL_MODE);
1121         init_curses();
1122 }
1123
1124 static void print_scroll_msg(void)
1125 {
1126         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1127         int first_rbe = first_visible_rbe(&lines_total);
1128
1129         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1130                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1131 }
1132
1133 static void com_scroll_top(void)
1134 {
1135         int i = RINGBUFFER_SIZE - 1;
1136         unsigned lines = 0;
1137
1138         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1139                 i--;
1140         /* i is oldest entry */
1141         for (; lines < bot.lines && i >= 0; i--) {
1142                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1143                 if (!rbe)
1144                         break;
1145                 lines += NUM_LINES(rbe->len);
1146         }
1147         i++;
1148         if (lines > 0 && scroll_position != i) {
1149                 scroll_position = i;
1150                 redraw_bot_win();
1151                 print_scroll_msg();
1152                 return;
1153         }
1154         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1155 }
1156
1157 static void com_cancel_scrolling(void)
1158 {
1159
1160         if (scroll_position == 0) {
1161                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1162                 return;
1163         }
1164         scroll_position = 0;
1165         redraw_bot_win();
1166 }
1167
1168 static void com_page_down(void)
1169 {
1170         unsigned lines = 0;
1171         int i = scroll_position;
1172
1173         while (lines < bot.lines && --i > 0) {
1174                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1175                 if (!rbe)
1176                         break;
1177                 lines += NUM_LINES(rbe->len);
1178         }
1179         if (lines) {
1180                 scroll_position = i;
1181                 redraw_bot_win();
1182                 print_scroll_msg();
1183                 return;
1184         }
1185         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1186 }
1187
1188 static void com_page_up(void)
1189 {
1190         unsigned lines;
1191         int fvr = first_visible_rbe(&lines);
1192
1193         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1194                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1195                 return;
1196         }
1197         scroll_position = fvr + 1;
1198         for (; scroll_position > 0; scroll_position--) {
1199                 first_visible_rbe(&lines);
1200                 if (lines == bot.lines)
1201                         break;
1202         }
1203         redraw_bot_win();
1204         print_scroll_msg();
1205 }
1206
1207 static void com_scroll_down(void)
1208 {
1209         struct rb_entry *rbe;
1210         int rbe_lines;
1211
1212         if (!scroll_position) {
1213                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1214                 return;
1215         }
1216         scroll_position--;
1217         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1218         rbe_lines = NUM_LINES(rbe->len);
1219         wscrl(bot.win, rbe_lines);
1220         wmove(bot.win, bot.lines - rbe_lines, 0);
1221         wattron(bot.win, COLOR_PAIR(rbe->color));
1222         waddstr(bot.win, rbe->msg);
1223         wrefresh(bot.win);
1224         print_scroll_msg();
1225 }
1226
1227 static void com_scroll_up(void)
1228 {
1229         struct rb_entry *rbe = NULL;
1230         unsigned lines;
1231         int i, first_rbe, num_scroll;
1232
1233         /* the entry that is going to vanish */
1234         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1235         if (!rbe)
1236                 goto err_out;
1237         num_scroll = NUM_LINES(rbe->len);
1238         first_rbe = first_visible_rbe(&lines);
1239         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1240                 goto err_out;
1241         scroll_position++;
1242         wscrl(bot.win, -num_scroll);
1243         i = draw_top_rbe(&lines);
1244         if (i < 0)
1245                 goto err_out;
1246         while (i > 0 && lines < num_scroll) {
1247                 int rbe_lines;
1248                 rbe = ringbuffer_get(bot_win_rb, --i);
1249                 if (!rbe)
1250                         break;
1251                 rbe_lines = NUM_LINES(rbe->len);
1252                 lines += rbe_lines;
1253 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1254                 wattron(bot.win, COLOR_PAIR(rbe->color));
1255                 waddstr(bot.win, "\n");
1256                 waddstr(bot.win, rbe->msg);
1257                 if (!i)
1258                         break;
1259                 i--;
1260         }
1261         wrefresh(bot.win);
1262         print_scroll_msg();
1263         return;
1264 err_out:
1265         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1266 }
1267
1268 static void com_ll_decr(void)
1269 {
1270         if (loglevel <= LL_DEBUG) {
1271                 print_in_bar(COLOR_ERRMSG,
1272                         "loglevel already at maximal verbosity\n");
1273                 return;
1274         }
1275         loglevel--;
1276         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1277 }
1278
1279 static void com_ll_incr(void)
1280 {
1281         if (loglevel >= LL_EMERG) {
1282                 print_in_bar(COLOR_ERRMSG,
1283                         "loglevel already at minimal verbosity\n");
1284                 return;
1285         }
1286         loglevel++;
1287         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1288 }
1289
1290 /*
1291  * reread configuration, terminate on errors
1292  */
1293 static void com_reread_conf(void)
1294 {
1295         char *cf = configfile_exists();
1296         struct gui_cmdline_parser_params params = {
1297                 .override = 1,
1298                 .initialize = 1,
1299                 .check_required = 0,
1300                 .check_ambiguity = 0,
1301                 .print_errors = 0,
1302         };
1303
1304         if (!cf) {
1305                 PARA_WARNING_LOG("there is no configuration to read\n");
1306                 return;
1307         }
1308         PARA_INFO_LOG("rereading command line options and config file\n");
1309         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1310         /*
1311          * Despite .print_errors is set to 0, gengetopt will print to stderr
1312          * anyway, and exit on errors. So we have to shutdown curses first.
1313          */
1314         shutdown_curses();
1315         gui_cmdline_parser_config_file(cf, &conf, &params);
1316         init_curses();
1317         PARA_NOTICE_LOG("config file reloaded\n");
1318         if (check_key_map_args() < 0)
1319                 finish(EXIT_FAILURE);
1320 }
1321
1322 static void com_help(void)
1323 {
1324         int i;
1325
1326         for (i = 0; i < conf.key_map_given; ++i) {
1327                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1328                 const char *handler_text = "???", *desc = NULL;
1329
1330                 if (!split_key_map(tmp, &handler, &arg)) {
1331                         free(tmp);
1332                         return;
1333                 }
1334                 switch (*handler) {
1335                         case 'i':
1336                                 handler_text = "internal";
1337                                 desc = command_list[find_cmd_byname(arg)].description;
1338                                 break;
1339                         case 'x': handler_text = "external"; break;
1340                         case 'd': handler_text = "display "; break;
1341                         case 'p': handler_text = "para    "; break;
1342                 }
1343                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1344                         strlen(arg) < 8? "\t" : "",
1345                         desc? desc : "");
1346                 free(tmp);
1347         }
1348         for (i = 0; command_list[i].handler; i++) {
1349                 struct gui_command gc = command_list[i];
1350
1351                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1352                         strlen(gc.name) < 8? "\t" : "",
1353                         gc.description);
1354         }
1355         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1356                 "for more info");
1357 }
1358
1359 static void com_shrink_top_win(void)
1360 {
1361         if (top.lines <= theme.top_lines_min) {
1362                 PARA_WARNING_LOG("can not decrease top window\n");
1363                 return;
1364         }
1365         init_wins(top.lines - 1);
1366         wclear(top.win);
1367         print_all_items();
1368         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1369 }
1370
1371 static void com_enlarge_top_win(void)
1372 {
1373         if (bot.lines < 3) {
1374                 PARA_WARNING_LOG("can not increase top window\n");
1375                 return;
1376         }
1377         init_wins(top.lines + 1);
1378         wclear(top.win);
1379         print_all_items();
1380         print_in_bar(COLOR_MSG, "increased top window");
1381 }
1382
1383 static void com_version(void)
1384 {
1385         print_in_bar(COLOR_MSG, "%s", version_single_line("gui"));
1386 }
1387
1388 __noreturn static void com_quit(void)
1389 {
1390         finish(0);
1391 }
1392
1393 static void com_refresh(void)
1394 {
1395         shutdown_curses();
1396         init_curses();
1397 }
1398
1399 static void com_next_theme(void)
1400 {
1401         theme_next(&theme);
1402         com_refresh();
1403 }
1404
1405 static void com_prev_theme(void)
1406 {
1407         theme_prev(&theme);
1408         com_refresh();
1409 }
1410
1411 static void handle_command(int c)
1412 {
1413         int i;
1414
1415         /* first check user-defined key bindings */
1416         for (i = 0; i < conf.key_map_given; ++i) {
1417                 char *tmp, *handler, *arg;
1418
1419                 tmp = para_strdup(conf.key_map_arg[i]);
1420                 if (!split_key_map(tmp, &handler, &arg)) {
1421                         free(tmp);
1422                         return;
1423                 }
1424                 if (strcmp(tmp, km_keyname(c))) {
1425                         free(tmp);
1426                         continue;
1427                 }
1428                 if (*handler == 'd')
1429                         display_cmd(arg);
1430                 else if (*handler == 'x')
1431                         external_cmd(arg);
1432                 else if (*handler == 'p')
1433                         para_cmd(arg);
1434                 else if (*handler == 'i') {
1435                         int num = find_cmd_byname(arg);
1436                         if (num >= 0)
1437                                 command_list[num].handler();
1438                 }
1439                 free(tmp);
1440                 return;
1441         }
1442         /* not found, check internal key bindings */
1443         for (i = 0; command_list[i].handler; i++) {
1444                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1445                         command_list[i].handler();
1446                         return;
1447                 }
1448         }
1449         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1450                 km_keyname(c));
1451 }
1452
1453 __noreturn static void print_help_and_die(void)
1454 {
1455         struct ggo_help h = DEFINE_GGO_HELP(gui);
1456         bool d = conf.detailed_help_given;
1457
1458         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
1459         exit(0);
1460 }
1461
1462 int main(int argc, char *argv[])
1463 {
1464         int ret;
1465         char *cf;
1466
1467         _argc = argc;
1468         _argv = argv;
1469
1470         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1471         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1472         version_handle_flag("gui", conf.version_given);
1473         if (conf.help_given || conf.detailed_help_given)
1474                 print_help_and_die();
1475         cf = configfile_exists();
1476         if (!cf && conf.config_file_given) {
1477                 fprintf(stderr, "can not read config file %s\n",
1478                         conf.config_file_arg);
1479                 exit(EXIT_FAILURE);
1480         }
1481         if (cf) {
1482                 struct gui_cmdline_parser_params params = {
1483                         .override = 0,
1484                         .initialize = 0,
1485                         .check_required = 0,
1486                         .check_ambiguity = 0,
1487                         .print_errors = 1,
1488                 };
1489                 gui_cmdline_parser_config_file(cf, &conf, &params);
1490                 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1491         }
1492         if (check_key_map_args() < 0) {
1493                 fprintf(stderr, "invalid key map\n");
1494                 exit(EXIT_FAILURE);
1495         }
1496         theme_init(conf.theme_arg, &theme);
1497         setup_signal_handling();
1498         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1499         setlocale(LC_CTYPE, "");
1500         initscr(); /* needed only once, always successful */
1501         init_curses();
1502         for (;;) {
1503                 print_status_bar();
1504                 ret = do_select(GETCH_MODE);
1505                 if (!ret)
1506                         continue;
1507                 print_in_bar(COLOR_MSG, " ");
1508                 handle_command(ret);
1509         }
1510 }