gui.c

   1 /*
   2  * Copyright (C) 1998-2013 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
  14 #include "gui.cmdline.h"
  15 #include "para.h"
  16 #include "gui.h"
  17 #include "string.h"
  18 #include "ringbuffer.h"
  19 #include "fd.h"
  20 #include "error.h"
  21 #include "list.h"
  22 #include "sched.h"
  23 #include "signal.h"
  24 #include "version.h"
  25
  26 /** define the array of error lists needed by para_gui */
  27 INIT_GUI_ERRLISTS;
  28 static char *stat_content[NUM_STAT_ITEMS];
  29
  30 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
  31
  32 static int signal_pipe;
  33
  34 static struct win_data {
  35         WINDOW *win;
  36         size_t begx;
  37         size_t begy;
  38         size_t cols;
  39         size_t lines;
  40 } top, bot, sb, in, sep;
  41
  42 #define RINGBUFFER_SIZE 512
  43 struct rb_entry {
  44         char *msg;
  45         size_t len;
  46         int color;
  47 };
  48 static struct ringbuffer *bot_win_rb;
  49 #define NUM_LINES(len) (1 + (len) / bot.cols)
  50
  51 static unsigned scroll_position;
  52
  53 static int curses_active;
  54 static pid_t cmd_pid;
  55
  56 static int command_fds[2];
  57 static int stat_pipe = -1;
  58 static struct gui_args_info conf;
  59
  60 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
  61
  62
  63 #define COLOR_STATUSBAR 52
  64 #define COLOR_COMMAND 53
  65 #define COLOR_OUTPUT 54
  66 #define COLOR_MSG 55
  67 #define COLOR_ERRMSG 56
  68 #define COLOR_WELCOME 57
  69 #define COLOR_SEPARATOR 58
  70 #define COLOR_TOP 59
  71 #define COLOR_BOT 60
  72
  73 struct gui_command {
  74         const char *key;
  75         const char *name;
  76         const char *description;
  77         void (*handler)(void);
  78 };
  79
  80 struct stat_item {
  81         char name[MAXLINE];
  82         char prefix[MAXLINE];
  83         char postfix[MAXLINE];
  84         unsigned y;
  85         unsigned x;
  86         unsigned len;
  87         int fg, bg;
  88         int align;
  89         char content[MAXLINE];
  90 };
  91
  92 static struct gui_theme theme;
  93
  94 static int _argc;
  95 static char **_argv;
  96
  97 static void com_help(void);
  98 static void com_reread_conf(void);
  99 static void com_enlarge_top_win(void);
 100 static void com_shrink_top_win(void);
 101 static void com_version(void);
 102 __noreturn static void com_quit(void);
 103 static void com_refresh(void);
 104 static void com_ll_incr(void);
 105 static void com_ll_decr(void);
 106 static void com_prev_theme(void);
 107 static void com_next_theme(void);
 108 static void com_scroll_up(void);
 109 static void com_scroll_down(void);
 110 static void com_page_up(void);
 111 static void com_page_down(void);
 112 static void com_cancel_scrolling(void);
 113 static void com_scroll_top(void);
 114
 115 static struct gui_command command_list[] = {
 116         {
 117                 .key = "?",
 118                 .name = "help",
 119                 .description = "print help",
 120                 .handler = com_help
 121         }, {
 122                 .key = "+",
 123                 .name = "enlarge_win",
 124                 .description = "enlarge the top window",
 125                 .handler = com_enlarge_top_win
 126         }, {
 127                 .key = "-",
 128                 .name = "shrink_win",
 129                 .description = "shrink the top window",
 130                 .handler = com_shrink_top_win
 131         }, {
 132                 .key = "r",
 133                 .name = "reread_conf",
 134                 .description = "reread configuration file",
 135                 .handler = com_reread_conf
 136         }, {
 137                 .key = "q",
 138                 .name = "quit",
 139                 .description = "exit para_gui",
 140                 .handler = com_quit
 141         }, {
 142                 .key = "^L",
 143                 .name = "refresh",
 144                 .description = "redraw the screen",
 145                 .handler = com_refresh
 146         }, {
 147                 .key = ".",
 148                 .name = "next_theme",
 149                 .description = "switch to next theme",
 150                 .handler = com_next_theme
 151         }, {
 152                 .key = ",",
 153                 .name = "prev_theme",
 154                 .description = "switch to previous stream",
 155                 .handler = com_prev_theme
 156         }, {
 157                 .key = ">",
 158                 .name = "ll_incr",
 159                 .description = "increase loglevel (decreases verbosity)",
 160                 .handler = com_ll_incr
 161         }, {
 162                 .key = "<",
 163                 .name = "ll_decr",
 164                 .description = "decrease loglevel (increases verbosity)",
 165                 .handler = com_ll_decr
 166         }, {
 167                 .key = "V",
 168                 .name = "version",
 169                 .description = "show the para_gui version",
 170                 .handler = com_version
 171         }, {
 172                 .key = "<up>",
 173                 .name = "scroll_up",
 174                 .description = "scroll up one line",
 175                 .handler = com_scroll_up
 176         }, {
 177                 .key = "<down>",
 178                 .name = "scroll_down",
 179                 .description = "scroll down one line",
 180                 .handler = com_scroll_down
 181         }, {
 182                 .key = "<ppage>",
 183                 .name = "page_up",
 184                 .description = "scroll up one page",
 185                 .handler = com_page_up
 186         }, {
 187                 .key = "<npage>",
 188                 .name = "page_down",
 189                 .description = "scroll down one page",
 190                 .handler = com_page_down
 191         }, {
 192                 .key = "<home>",
 193                 .name = "scroll_top",
 194                 .description = "scroll to top of buffer",
 195                 .handler = com_scroll_top
 196         }, {
 197                 .key = "<end>",
 198                 .name = "cancel_scroll",
 199                 .description = "deactivate scroll mode",
 200                 .handler = com_cancel_scrolling
 201         }, {
 202                 .handler = NULL
 203         }
 204 };
 205
 206 static int find_cmd_byname(char *name)
 207 {
 208         int i;
 209
 210         for (i = 0; command_list[i].handler; i++)
 211                 if (!strcmp(command_list[i].name, name))
 212                         return i;
 213         return -1;
 214 }
 215
 216 /* taken from mutt */
 217 static char *km_keyname(int c)
 218 {
 219         static char buf[10];
 220
 221         if (c == KEY_UP) {
 222                 sprintf(buf, "<up>");
 223                 return buf;
 224         }
 225         if (c == KEY_DOWN) {
 226                 sprintf(buf, "<down>");
 227                 return buf;
 228         }
 229         if (c == KEY_LEFT) {
 230                 sprintf(buf, "<left>");
 231                 return buf;
 232         }
 233         if (c == KEY_RIGHT) {
 234                 sprintf(buf, "<right>");
 235                 return buf;
 236         }
 237         if (c == KEY_NPAGE) {
 238                 sprintf(buf, "<npage>");
 239                 return buf;
 240         }
 241         if (c == KEY_PPAGE) {
 242                 sprintf(buf, "<ppage>");
 243                 return buf;
 244         }
 245         if (c == KEY_HOME) {
 246                 sprintf(buf, "<home>");
 247                 return buf;
 248         }
 249         if (c == KEY_END) {
 250                 sprintf(buf, "<end>");
 251                 return buf;
 252         }
 253         if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
 254                 if (c < 0)
 255                         c += 256;
 256                 if (c < 128) {
 257                         buf[0] = '^';
 258                         buf[1] = (c + '@') & 0x7f;
 259                         buf[2] = 0;
 260                 } else
 261                         snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
 262                                 (c >> 3) & 7, c & 7);
 263         } else if (c >= KEY_F0 && c < KEY_F(256))
 264                 sprintf(buf, "<F%d>", c - KEY_F0);
 265         else if (isprint(c))
 266                 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
 267         else
 268                 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
 269         return buf;
 270 }
 271
 272 static char *configfile_exists(void)
 273 {
 274         static char *config_file;
 275         char *tmp;
 276
 277         if (!conf.config_file_given) {
 278                 if (!config_file) {
 279                         char *home = para_homedir();
 280                         config_file = make_message("%s/.paraslash/gui.conf",
 281                                 home);
 282                         free(home);
 283                 }
 284                 tmp = config_file;
 285         } else
 286                 tmp = conf.config_file_arg;
 287         return file_exists(tmp)? tmp: NULL;
 288 }
 289
 290 /*
 291  * print num spaces to curses window
 292  */
 293 static void add_spaces(WINDOW* win, unsigned int num)
 294 {
 295         while (num > 0) {
 296                 num--;
 297                 waddstr(win, " ");
 298         }
 299 }
 300
 301 /*
 302  * print aligned string to curses window. This function always prints
 303  * exactly len chars.
 304  */
 305 static int align_str(WINDOW* win, char *str, unsigned int len,
 306                 unsigned int align)
 307 {
 308         int i, num; /* of spaces */
 309
 310         if (!win || !str)
 311                 return -1;
 312         num = len - strlen(str);
 313         if (num < 0) {
 314                 str[len] = '\0';
 315                 num = 0;
 316         }
 317         /* replace control characters by spaces */
 318         for (i = 0; i < len && str[i]; i++) {
 319                 if (str[i] == '\n' || str[i] == '\r' || str[i] == '\f')
 320                         str[i] = ' ';
 321         }
 322         if (align == LEFT) {
 323                 waddstr(win, str);
 324                 add_spaces(win, num);
 325         } else if (align == RIGHT) {
 326                 add_spaces(win, num);
 327                 waddstr(win, str);
 328         } else {
 329                 add_spaces(win, num / 2);
 330                 waddstr(win, str[0]? str: "");
 331                 add_spaces(win, num - num / 2);
 332         }
 333         return 1;
 334 }
 335
 336 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
 337 {
 338         char *msg;
 339         va_list ap;
 340
 341         if (!curses_active)
 342                 return;
 343         wattron(in.win, COLOR_PAIR(color));
 344         va_start(ap, fmt);
 345         xvasprintf(&msg, fmt, ap);
 346         va_end(ap);
 347         wmove(in.win, 0, 0);
 348         align_str(in.win, msg, sb.cols, LEFT);
 349         free(msg);
 350         wrefresh(in.win);
 351 }
 352
 353 /*
 354  * update the status bar
 355  */
 356 static void print_status_bar(void)
 357 {
 358         char *tmp;
 359
 360         if (!curses_active)
 361                 return;
 362         tmp = para_strdup(STANDARD_STATUS_BAR);
 363         wmove(sb.win, 0, 0);
 364         align_str(sb.win, tmp, sb.cols, CENTER);
 365         free(tmp);
 366         wrefresh(sb.win);
 367 }
 368
 369 /*
 370  * get the number of the oldest rbe that is (partially) visible. On return,
 371  * lines contains the sum of the number of lines of all visable entries. If the
 372  * first one is only partially visible, lines is greater than bot.lines.
 373  */
 374 static int first_visible_rbe(unsigned *lines)
 375 {
 376         int i;
 377         *lines = 0;
 378         for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
 379                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
 380                 int rbe_lines;
 381                 if (!rbe)
 382                         return i - 1;
 383 //              fprintf(stderr, "found: %s\n", rbe->msg);
 384                 rbe_lines = NUM_LINES(rbe->len);
 385                 if (rbe_lines > bot.lines)
 386                         return -1;
 387                 *lines += rbe_lines;
 388                 if (*lines >= bot.lines)
 389                         return i;
 390         }
 391         return RINGBUFFER_SIZE - 1;
 392 }
 393
 394 static int draw_top_rbe(unsigned *lines)
 395 {
 396         unsigned len;
 397         int offset, fvr = first_visible_rbe(lines);
 398         struct rb_entry *rbe;
 399
 400         if (fvr < 0)
 401                 return -1;
 402         wmove(bot.win, 0, 0);
 403         rbe = ringbuffer_get(bot_win_rb, fvr);
 404         if (!rbe)
 405                 return -1;
 406         len = strlen(rbe->msg);
 407         if (*lines > bot.lines) {
 408                 /* first rbe is only partially visible */
 409                 offset = (*lines - bot.lines) * bot.cols;
 410                 assert(offset <= len);
 411         } else
 412                 offset = 0;
 413         wattron(bot.win, COLOR_PAIR(rbe->color));
 414         waddstr(bot.win, rbe->msg + offset);
 415         *lines = NUM_LINES(len - offset);
 416         return fvr;
 417 }
 418
 419 static void redraw_bot_win(void)
 420 {
 421         unsigned lines;
 422         int i;
 423
 424         wmove(bot.win, 0, 0);
 425         wclear(bot.win);
 426         i = draw_top_rbe(&lines);
 427         if (i <= 0)
 428                 goto out;
 429         while (i > 0 && lines < bot.lines) {
 430                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
 431                 if (!rbe) {
 432                         lines++;
 433                         waddstr(bot.win, "\n");
 434                         continue;
 435                 }
 436                 lines += NUM_LINES(rbe->len);
 437                 wattron(bot.win, COLOR_PAIR(rbe->color));
 438                 waddstr(bot.win, "\n");
 439                 waddstr(bot.win, rbe->msg);
 440         }
 441 out:
 442         wrefresh(bot.win);
 443 }
 444
 445 static void rb_add_entry(int color, char *msg)
 446 {
 447         struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
 448         int x, y;
 449         new->color = color;
 450         new->len = strlen(msg);
 451         new->msg = msg;
 452         old = ringbuffer_add(bot_win_rb, new);
 453 //      fprintf(stderr, "added: %s\n", new->msg);
 454         if (old) {
 455                 free(old->msg);
 456                 free(old);
 457         }
 458         if (scroll_position) {
 459                 /* discard current scrolling, like xterm does */
 460                 scroll_position = 0;
 461                 redraw_bot_win();
 462                 return;
 463         }
 464         wattron(bot.win, COLOR_PAIR(color));
 465         getyx(bot.win, y, x);
 466         if (y || x)
 467                 waddstr(bot.win, "\n");
 468         waddstr(bot.win, msg);
 469 }
 470
 471 /*
 472  * print formated output to bot win and refresh
 473  */
 474 __printf_2_3 static void outputf(int color, const char* fmt,...)
 475 {
 476         char *msg;
 477         va_list ap;
 478
 479         if (!curses_active)
 480                 return;
 481         va_start(ap, fmt);
 482         xvasprintf(&msg, fmt, ap);
 483         va_end(ap);
 484         rb_add_entry(color, msg);
 485         wrefresh(bot.win);
 486 }
 487
 488 static int add_output_line(char *line, void *data)
 489 {
 490         int color = *(int *)data? COLOR_ERRMSG : COLOR_OUTPUT;
 491         if (!curses_active)
 492                 return 1;
 493         rb_add_entry(color, para_strdup(line));
 494         return 1;
 495 }
 496
 497 static int loglevel;
 498
 499 __printf_2_3 void curses_log(int ll, const char *fmt,...)
 500 {
 501         int color;
 502         char *msg;
 503         va_list ap;
 504
 505         if (ll < loglevel || !curses_active)
 506                 return;
 507         switch (ll) {
 508                 case LL_DEBUG:
 509                 case LL_INFO:
 510                 case LL_NOTICE:
 511                         color = COLOR_MSG;
 512                         break;
 513                 default:
 514                         color = COLOR_ERRMSG;
 515         }
 516         va_start(ap, fmt);
 517         xvasprintf(&msg, fmt, ap);
 518         va_end(ap);
 519         chop(msg);
 520         rb_add_entry(color, msg);
 521         wrefresh(bot.win);
 522 }
 523 __printf_2_3 void (*para_log)(int, const char*, ...) = curses_log;
 524
 525 static void setup_signal_handling(void)
 526 {
 527         signal_pipe = para_signal_init();
 528         para_install_sighandler(SIGINT);
 529         para_install_sighandler(SIGTERM);
 530         para_install_sighandler(SIGCHLD);
 531         para_install_sighandler(SIGWINCH);
 532         para_install_sighandler(SIGUSR1);
 533         para_sigaction(SIGHUP, SIG_IGN);
 534 }
 535
 536 /* kill every process in the process group and exit */
 537 __noreturn static void kill_pg_and_die(int ret)
 538 {
 539         para_sigaction(SIGTERM, SIG_IGN);
 540         kill(0, SIGTERM);
 541         exit(ret);
 542 }
 543
 544 static void shutdown_curses(void)
 545 {
 546         if (!curses_active)
 547                 return;
 548         def_prog_mode();
 549         curses_active = 0;
 550         endwin();
 551 }
 552
 553 __noreturn static void finish(int ret)
 554 {
 555         shutdown_curses();
 556         kill_pg_and_die(ret);
 557 }
 558
 559 /*
 560  * exit curses and print given message to stdout/stderr
 561  */
 562 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
 563 {
 564         va_list argp;
 565         FILE *outfd = ret? stderr: stdout;
 566
 567         shutdown_curses();
 568         va_start(argp, fmt);
 569         vfprintf(outfd, fmt, argp);
 570         va_end(argp);
 571         kill_pg_and_die(ret);
 572 }
 573
 574 static void print_welcome(void)
 575 {
 576         if (loglevel > LL_NOTICE)
 577                 return;
 578         outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
 579                 " \"" CODENAME "\". Theme: %s", theme.name);
 580         wclrtoeol(bot.win);
 581 }
 582
 583 /*
 584  * init all windows
 585  */
 586 static void init_wins(int top_lines)
 587 {
 588         int i;
 589
 590         top.lines = top_lines;
 591         top.cols = COLS;
 592         top.begy = 0;
 593         top.begx = 0;
 594
 595         bot.lines = LINES - top.lines - 3;
 596         bot.cols = COLS;
 597         bot.begy = top.lines + 1;
 598         bot.begx = 0;
 599
 600         sb.lines = 1;
 601         sb.cols = COLS;
 602         sb.begy = LINES - 2;
 603         sb.begx = 0;
 604
 605         in.lines = 1;
 606         in.cols = COLS;
 607         in.begy = LINES - 1;
 608         in.begx = 0;
 609
 610         sep.lines = 1;
 611         sep.cols = COLS;
 612         sep.begy = top.lines;
 613         sep.begx = 0;
 614
 615         assume_default_colors(theme.default_fg, theme.default_bg);
 616         if (top.win) {
 617                 mvwin(top.win, top.begy, top.begx);
 618                 wresize(top.win, top.lines, top.cols);
 619
 620                 mvwin(sb.win, sb.begy, sb.begx);
 621                 wresize(sb.win, sb.lines, sb.cols);
 622
 623                 mvwin(sep.win, sep.begy, sep.begx);
 624                 wresize(sep.win, sep.lines, sep.cols);
 625
 626                 mvwin(bot.win, bot.begy, bot.begx);
 627                 wresize(bot.win, bot.lines, bot.cols);
 628
 629                 mvwin(in.win, in.begy, in.begx);
 630                 wresize(in.win, in.lines, in.cols);
 631         } else {
 632                 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
 633                 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
 634                 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
 635                 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
 636                 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
 637                 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
 638                         msg_n_exit(1, "Error: Cannot create curses windows\n");
 639                 wclear(bot.win);
 640                 wclear(sb.win);
 641                 wclear(in.win);
 642                 scrollok(bot.win, 1);
 643                 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
 644                 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
 645                 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
 646                 wattron(top.win, COLOR_PAIR(COLOR_TOP));
 647                 nodelay(top.win, 1);
 648                 nodelay(bot.win, 1);
 649                 nodelay(sb.win, 1);
 650                 nodelay(in.win, 0);
 651
 652                 keypad(top.win, 1);
 653                 keypad(bot.win, 1);
 654                 keypad(sb.win, 1);
 655                 keypad(in.win, 1);
 656                 print_status_bar();
 657         }
 658         wmove(sep.win, 0, 0);
 659         for (i = 1; i <= COLS; i++)
 660                 waddstr(sep.win, theme.sep_str);
 661         wclear(top.win);
 662         //wclear(bot.win);
 663         wnoutrefresh(top.win);
 664         wnoutrefresh(bot.win);
 665         //wnoutrefresh(sb.win);
 666         print_status_bar();
 667         wnoutrefresh(in.win);
 668         wnoutrefresh(sep.win);
 669         doupdate();
 670 }
 671
 672 /*
 673  * Print stat item #i to curses window
 674  */
 675 static void print_stat_item(int i)
 676 {
 677         char *tmp;
 678         struct stat_item_data d = theme.data[i];
 679         char *c = stat_content[i];
 680
 681         if (!curses_active || !d.len || !c)
 682                 return;
 683         tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
 684         wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
 685         wrefresh(top.win);
 686         wattron(top.win, COLOR_PAIR(i + 1));
 687         align_str(top.win, tmp, d.len * COLS / 100, d.align);
 688         free(tmp);
 689         wrefresh(top.win);
 690 }
 691
 692 static int update_item(int item_num, char *buf)
 693 {
 694         char **c = stat_content + item_num;
 695
 696         free(*c);
 697         if (buf && buf[0])
 698                 goto dup;
 699         switch (item_num) {
 700         case SI_ARTIST:
 701                 *c = para_strdup("(artist tag not set)");
 702                 goto print;
 703         case SI_TITLE:
 704                 *c = para_strdup("(title tag not set)");
 705                 goto print;
 706         case SI_YEAR:
 707                 *c = para_strdup("????");
 708                 goto print;
 709         case SI_ALBUM:
 710                 *c = para_strdup("(album tag not set)");
 711                 goto print;
 712         case SI_COMMENT:
 713                 *c = para_strdup("(comment tag not set)");
 714                 goto print;
 715         }
 716 dup:
 717         *c = para_strdup(buf);
 718 print:
 719         print_stat_item(item_num);
 720         return 1;
 721 }
 722
 723 static int read_stat_pipe(fd_set *rfds)
 724 {
 725         static char *buf;
 726         static int bufsize, loaded;
 727         int ret, ret2;
 728         size_t sz;
 729
 730         if (stat_pipe < 0)
 731                 return 0;
 732         if (loaded >= bufsize) {
 733                 if (bufsize > 1000 * 1000) {
 734                         loaded = 0;
 735                         return 0;
 736                 }
 737                 bufsize += bufsize + 1000;
 738                 buf = para_realloc(buf, bufsize);
 739         }
 740         assert(loaded < bufsize);
 741         ret = read_nonblock(stat_pipe, buf + loaded, bufsize - loaded,
 742                 rfds, &sz);
 743         loaded += sz;
 744         ret2 = for_each_stat_item(buf, loaded, update_item);
 745         if (ret < 0 || ret2 < 0) {
 746                 loaded = 0;
 747                 return ret2 < 0? ret2 : ret;
 748         }
 749         sz = ret2; /* what is left */
 750         if (sz > 0 && sz < loaded)
 751                 memmove(buf, buf + loaded - sz, sz);
 752         loaded = sz;
 753         return 1;
 754 }
 755
 756 static void print_all_items(void)
 757 {
 758         int i;
 759
 760         if (!curses_active)
 761                 return;
 762         FOR_EACH_STATUS_ITEM(i)
 763                 print_stat_item(i);
 764 }
 765
 766 static void clear_all_items(void)
 767 {
 768         int i;
 769
 770         FOR_EACH_STATUS_ITEM(i) {
 771                 free(stat_content[i]);
 772                 stat_content[i] = para_strdup("");
 773         }
 774 }
 775
 776 static void init_pair_or_die(short pair, short f, short b)
 777 {
 778         if (init_pair(pair, f, b) == ERR)
 779                 msg_n_exit(EXIT_FAILURE, "fatal: init_pair() failed\n");
 780 }
 781
 782 static void init_colors_or_die(void)
 783 {
 784         int i;
 785
 786         if (!has_colors())
 787                 msg_n_exit(EXIT_FAILURE, "fatal: No color term\n");
 788         if (start_color() == ERR)
 789                 msg_n_exit(EXIT_FAILURE, "fatal: failed to start colors\n");
 790         FOR_EACH_STATUS_ITEM(i)
 791                 if (theme.data[i].len)
 792                         init_pair_or_die(i + 1, theme.data[i].fg,
 793                                 theme.data[i].bg);
 794         init_pair_or_die(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
 795         init_pair_or_die(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
 796         init_pair_or_die(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
 797         init_pair_or_die(COLOR_MSG, theme.msg_fg, theme.msg_bg);
 798         init_pair_or_die(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
 799         init_pair_or_die(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
 800         init_pair_or_die(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
 801         init_pair_or_die(COLOR_TOP, theme.default_fg, theme.default_bg);
 802         init_pair_or_die(COLOR_BOT, theme.default_fg, theme.default_bg);
 803 }
 804
 805 /* (Re-)initialize the curses library. */
 806 static void init_curses(void)
 807 {
 808         curses_active = 1;
 809         if (top.win && refresh() == ERR) /* refesh is really needed */
 810                 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
 811         if (LINES < theme.lines_min || COLS < theme.cols_min)
 812                 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
 813                         " (need at least %dx%d)\n", COLS, LINES,
 814                         theme.cols_min, theme.lines_min);
 815         curs_set(0); /* make cursor invisible, ignore errors */
 816         nonl(); /* do not NL->CR/NL on output, always returns OK */
 817         /* don't echo input */
 818         if (noecho() == ERR)
 819                 msg_n_exit(EXIT_FAILURE, "fatal: noecho() failed\n");
 820         /* take input chars one at a time, no wait for \n */
 821         if (cbreak() == ERR)
 822                 msg_n_exit(EXIT_FAILURE, "fatal: cbreak() failed\n");
 823         init_colors_or_die();
 824         clear(); /* ignore non-fatal errors */
 825         init_wins(theme.top_lines_default);
 826         print_all_items();
 827         // noecho(); /* don't echo input */
 828 }
 829
 830 static void check_sigchld(void)
 831 {
 832         int ret;
 833         pid_t pid;
 834 reap_next_child:
 835         ret = para_reap_child(&pid);
 836         if (ret <= 0)
 837                 return;
 838         if (pid == cmd_pid)
 839                 cmd_pid = 0;
 840         goto reap_next_child;
 841 }
 842
 843 /*
 844  * This sucker modifies its first argument. *handler and *arg are
 845  * pointers to 0-terminated strings (inside line). Crap.
 846  */
 847 static int split_key_map(char *line, char **handler, char **arg)
 848 {
 849         if (!(*handler = strchr(line + 1, ':')))
 850                 goto err_out;
 851         **handler = '\0';
 852         (*handler)++;
 853         if (!(*arg = strchr(*handler, ':')))
 854                 goto err_out;
 855         **arg = '\0';
 856         (*arg)++;
 857         return 1;
 858 err_out:
 859         return 0;
 860 }
 861
 862 static int check_key_map_args(void)
 863 {
 864         char *s;
 865         int i, ret = -1;
 866         char *tmp = NULL, *handler, *arg;
 867
 868         for (i = 0; i < conf.key_map_given; ++i) {
 869                 s = conf.key_map_arg[i];
 870                 if (!(*s))
 871                         goto err_out;
 872                 free(tmp);
 873                 tmp = para_strdup(s);
 874                 if (!split_key_map(tmp, &handler, &arg))
 875                         goto err_out;
 876                 if (strlen(handler) != 1)
 877                         goto err_out;
 878                 if (*handler != 'x'
 879                         && *handler != 'd'
 880                         && *handler != 'i'
 881                         && *handler != 'p')
 882                         goto err_out;
 883                 if (*handler != 'i')
 884                         continue;
 885                 if (find_cmd_byname(arg) < 0)
 886                         goto err_out;
 887         }
 888         ret = 0;
 889 err_out:
 890         free(tmp);
 891         return ret;
 892 }
 893
 894 /*
 895  * React to various signal-related events
 896  */
 897 static void handle_signal(int sig)
 898 {
 899         switch (sig) {
 900         case SIGTERM:
 901                 msg_n_exit(EXIT_FAILURE,
 902                         "only the good die young (caught SIGTERM))\n");
 903                 return;
 904         case SIGWINCH:
 905                 if (curses_active) {
 906                         shutdown_curses();
 907                         init_curses();
 908                         redraw_bot_win();
 909                 }
 910                 return;
 911         case SIGINT:
 912                 PARA_WARNING_LOG("caught SIGINT, reset");
 913                 /* Nothing to do. SIGINT killed our child which gets noticed
 914                  * by do_select and resets everything.
 915                  */
 916                 return;
 917         case SIGUSR1:
 918                 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
 919                 com_reread_conf();
 920                 return;
 921         case SIGCHLD:
 922                 check_sigchld();
 923                 return;
 924         }
 925 }
 926
 927 static int open_stat_pipe(void)
 928 {
 929         static int init = 1;
 930         int ret, fds[3] = {0, 1, 0};
 931         pid_t pid;
 932
 933         if (init)
 934                 init = 0;
 935         else
 936                 /*
 937                  * Sleep a bit to avoid a busy loop. As the call to sleep() may
 938                  * be interrupted by SIGCHLD, we simply wait until the call
 939                  * succeeds.
 940                  */
 941                 while (sleep(2))
 942                         ; /* nothing */
 943         ret = para_exec_cmdline_pid(&pid, conf.stat_cmd_arg, fds);
 944         if (ret < 0)
 945                 return ret;
 946         ret = mark_fd_nonblocking(fds[1]);
 947         if (ret >= 0)
 948                 return fds[1];
 949         close(fds[1]);
 950         return ret;
 951 }
 952
 953 #define COMMAND_BUF_SIZE 32768
 954
 955 /*
 956  * This is the core select loop. Besides the (internal) signal
 957  * pipe, the following other fds are checked according to the mode:
 958  *
 959  * GETCH_MODE: check stdin, return when key is pressed
 960  *
 961  * COMMAND_MODE: check command fds and stdin. Return when peer has closed both
 962  * stdout and stderr or when any key is pressed.
 963  *
 964  * EXTERNAL_MODE: Check only signal pipe. Used when an external command
 965  * is running. During that time curses is disabled.  Returns when
 966  * cmd_pid == 0.
 967  */
 968 static int do_select(int mode)
 969 {
 970         fd_set rfds;
 971         int ret, i, max_fileno;
 972         char command_buf[2][COMMAND_BUF_SIZE] = {"", ""};
 973         int cbo[2] = {0, 0}; /* command buf offsets */
 974         struct timeval tv;
 975
 976 repeat:
 977         tv.tv_sec = conf.timeout_arg  / 1000;
 978         tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
 979 //      ret = refresh_status();
 980         FD_ZERO(&rfds);
 981         max_fileno = 0;
 982         if (stat_pipe < 0)
 983                 stat_pipe = open_stat_pipe();
 984         if (stat_pipe >= 0)
 985                 para_fd_set(stat_pipe, &rfds, &max_fileno);
 986         /* signal pipe */
 987         para_fd_set(signal_pipe, &rfds, &max_fileno);
 988         /* command pipe only for COMMAND_MODE */
 989         if (mode == COMMAND_MODE) {
 990                 if (command_fds[0] >= 0)
 991                         para_fd_set(command_fds[0], &rfds, &max_fileno);
 992                 if (command_fds[1] >= 0)
 993                         para_fd_set(command_fds[1], &rfds, &max_fileno);
 994         }
 995         if (mode == GETCH_MODE || mode == COMMAND_MODE)
 996                 para_fd_set(STDIN_FILENO, &rfds, &max_fileno);
 997         ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
 998         if (ret <= 0)
 999                 goto check_return; /* skip fd checks */
1000         /* signals */
1001         ret = para_next_signal(&rfds);
1002         if (ret > 0)
1003                 handle_signal(ret);
1004         /* read command pipe if ready */
1005         if (mode == COMMAND_MODE) {
1006                 for (i = 0; i < 2; i++) {
1007                         size_t sz;
1008                         if (command_fds[i] < 0)
1009                                 continue;
1010                         ret = read_nonblock(command_fds[i],
1011                                 command_buf[i] + cbo[i],
1012                                 COMMAND_BUF_SIZE - 1 - cbo[i], &rfds, &sz);
1013                         cbo[i] += sz;
1014                         sz = cbo[i];
1015                         cbo[i] = for_each_line(command_buf[i], cbo[i],
1016                                 add_output_line, &i);
1017                         if (sz != cbo[i])
1018                                 wrefresh(bot.win);
1019                         if (ret < 0) {
1020                                 PARA_NOTICE_LOG("closing command fd %d: %s",
1021                                         i, para_strerror(-ret));
1022                                 close(command_fds[i]);
1023                                 command_fds[i] = -1;
1024                                 if (command_fds[!i] < 0) /* both fds closed */
1025                                         return 0;
1026                         }
1027                         if (cbo[i] == COMMAND_BUF_SIZE - 1) {
1028                                 PARA_NOTICE_LOG("discarding overlong line");
1029                                 cbo[i] = 0;
1030                         }
1031                 }
1032         }
1033         ret = read_stat_pipe(&rfds);
1034         if (ret < 0) {
1035                 PARA_NOTICE_LOG("closing stat pipe: %s\n", para_strerror(-ret));
1036                 close(stat_pipe);
1037                 stat_pipe = -1;
1038                 clear_all_items();
1039                 free(stat_content[SI_BASENAME]);
1040                 stat_content[SI_BASENAME] =
1041                         para_strdup("stat command terminated!?");
1042                 print_all_items();
1043         }
1044 check_return:
1045         switch (mode) {
1046         case COMMAND_MODE:
1047                 ret = wgetch(top.win);
1048                 if (ret != ERR && ret != KEY_RESIZE) {
1049                         if (command_fds[0] >= 0) {
1050                                 close(command_fds[0]);
1051                                 command_fds[0] = -1;
1052                         }
1053                         if (command_fds[1] >= 0) {
1054                                 close(command_fds[1]);
1055                                 command_fds[1] = -1;
1056                         }
1057                         if (cmd_pid)
1058                                 kill(cmd_pid, SIGTERM);
1059                         return -1;
1060                 }
1061                 break;
1062         case GETCH_MODE:
1063                 ret = wgetch(top.win);
1064                 if (ret != ERR && ret != KEY_RESIZE)
1065                         return ret;
1066                 break;
1067         case EXTERNAL_MODE:
1068                 if (cmd_pid == 0)
1069                         return 0;
1070         }
1071         goto repeat;
1072 }
1073
1074 /*
1075  * read from command pipe and print data to bot window
1076  */
1077 static void send_output(void)
1078 {
1079         int ret;
1080
1081         ret = mark_fd_nonblocking(command_fds[0]);
1082         if (ret < 0)
1083                 goto fail;
1084         ret = mark_fd_nonblocking(command_fds[1]);
1085         if (ret < 0)
1086                 goto fail;
1087         if (do_select(COMMAND_MODE) >= 0)
1088                 PARA_INFO_LOG("command complete");
1089         else
1090                 PARA_NOTICE_LOG("command aborted");
1091         print_in_bar(COLOR_MSG, " ");
1092         return;
1093 fail:
1094         PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1095         close(command_fds[0]);
1096         close(command_fds[1]);
1097 }
1098
1099 static void para_cmd(char *cmd)
1100 {
1101         int ret, fds[3] = {0, 1, 1};
1102         char *c = make_message(BINDIR "/para_client -- %s", cmd);
1103
1104         outputf(COLOR_COMMAND, "%s", c);
1105         print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1106         ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1107         free(c);
1108         if (ret < 0)
1109                 return;
1110         command_fds[0] = fds[1];
1111         command_fds[1] = fds[2];
1112         send_output();
1113 }
1114
1115 /*
1116  * exec command and print output to bot win
1117  */
1118 static void display_cmd(char *cmd)
1119 {
1120         int fds[3] = {0, 1, 1};
1121
1122         print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1123         outputf(COLOR_COMMAND, "%s", cmd);
1124         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1125                 return;
1126         command_fds[0] = fds[1];
1127         command_fds[1] = fds[2];
1128         send_output();
1129 }
1130
1131 /*
1132  * shutdown curses and stat pipe before executing external commands
1133  */
1134 static void external_cmd(char *cmd)
1135 {
1136         int fds[3] = {-1, -1, -1};
1137
1138         if (cmd_pid)
1139                 return;
1140         shutdown_curses();
1141         if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1142                 return;
1143         do_select(EXTERNAL_MODE);
1144         init_curses();
1145 }
1146
1147 static void print_scroll_msg(void)
1148 {
1149         unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1150         int first_rbe = first_visible_rbe(&lines_total);
1151         print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1152                 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1153 }
1154
1155 static void com_scroll_top(void)
1156 {
1157         int i = RINGBUFFER_SIZE - 1;
1158         unsigned lines = 0;
1159
1160         while (i > 0 && !ringbuffer_get(bot_win_rb, i))
1161                 i--;
1162         /* i is oldest entry */
1163         for (; lines < bot.lines && i >= 0; i--) {
1164                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1165                 if (!rbe)
1166                         break;
1167                 lines += NUM_LINES(strlen(rbe->msg));
1168         }
1169         i++;
1170         if (lines > 0 && scroll_position != i) {
1171                 scroll_position = i;
1172                 redraw_bot_win();
1173                 print_scroll_msg();
1174                 return;
1175         }
1176         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1177 }
1178
1179 static void com_cancel_scrolling(void)
1180 {
1181
1182         if (scroll_position == 0) {
1183                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1184                 return;
1185         }
1186         scroll_position = 0;
1187         redraw_bot_win();
1188 }
1189
1190 static void com_page_down(void)
1191 {
1192         unsigned lines = 0;
1193         int i = scroll_position;
1194         while (lines < bot.lines && --i > 0) {
1195                 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1196                 if (!rbe)
1197                         break;
1198                 lines += NUM_LINES(strlen(rbe->msg));
1199         }
1200         if (lines) {
1201                 scroll_position = i;
1202                 redraw_bot_win();
1203                 print_scroll_msg();
1204                 return;
1205         }
1206         print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1207 }
1208
1209 static void com_page_up(void)
1210 {
1211         unsigned lines;
1212         int fvr = first_visible_rbe(&lines);
1213
1214         if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1215                 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1216                 return;
1217         }
1218         scroll_position = fvr + 1;
1219         for (; scroll_position > 0; scroll_position--) {
1220                 first_visible_rbe(&lines);
1221                 if (lines == bot.lines)
1222                         break;
1223         }
1224         redraw_bot_win();
1225         print_scroll_msg();
1226 }
1227
1228 static void com_scroll_down(void)
1229 {
1230         struct rb_entry *rbe;
1231         int rbe_lines;
1232
1233         if (!scroll_position) {
1234                 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1235                 return;
1236         }
1237         scroll_position--;
1238         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1239         rbe_lines = NUM_LINES(rbe->len);
1240         wscrl(bot.win, rbe_lines);
1241         wmove(bot.win, bot.lines - rbe_lines, 0);
1242         wattron(bot.win, COLOR_PAIR(rbe->color));
1243         waddstr(bot.win, rbe->msg);
1244         wrefresh(bot.win);
1245         print_scroll_msg();
1246 }
1247
1248 static void com_scroll_up(void)
1249 {
1250         struct rb_entry *rbe = NULL;
1251         unsigned lines;
1252         int i, first_rbe, num_scroll;
1253
1254         /* the entry that is going to vanish */
1255         rbe = ringbuffer_get(bot_win_rb, scroll_position);
1256         if (!rbe)
1257                 goto err_out;
1258         num_scroll = NUM_LINES(rbe->len);
1259         first_rbe = first_visible_rbe(&lines);
1260         if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1261                 goto err_out;
1262         scroll_position++;
1263         wscrl(bot.win, -num_scroll);
1264         i = draw_top_rbe(&lines);
1265         if (i < 0)
1266                 goto err_out;
1267         while (i > 0 && lines < num_scroll) {
1268                 int rbe_lines;
1269                 rbe = ringbuffer_get(bot_win_rb, --i);
1270                 if (!rbe)
1271                         break;
1272                 rbe_lines = NUM_LINES(rbe->len);
1273                 lines += rbe_lines;
1274 //              fprintf(stderr, "msg: %s\n", rbe->msg);
1275                 wattron(bot.win, COLOR_PAIR(rbe->color));
1276                 waddstr(bot.win, "\n");
1277                 waddstr(bot.win, rbe->msg);
1278                 if (!i)
1279                         break;
1280                 i--;
1281         }
1282         wrefresh(bot.win);
1283         print_scroll_msg();
1284         return;
1285 err_out:
1286         print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1287 }
1288
1289 static void com_ll_decr(void)
1290 {
1291         if (loglevel <= LL_DEBUG) {
1292                 print_in_bar(COLOR_ERRMSG,
1293                         "loglevel already at maximal verbosity\n");
1294                 return;
1295         }
1296         loglevel--;
1297         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1298 }
1299
1300 static void com_ll_incr(void)
1301 {
1302         if (loglevel >= LL_EMERG) {
1303                 print_in_bar(COLOR_ERRMSG,
1304                         "loglevel already at minimal verbosity\n");
1305                 return;
1306         }
1307         loglevel++;
1308         print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1309 }
1310
1311 /*
1312  * reread configuration, terminate on errors
1313  */
1314 static void com_reread_conf(void)
1315 {
1316         char *cf =configfile_exists();
1317         struct gui_cmdline_parser_params params = {
1318                 .override = 1,
1319                 .initialize = 1,
1320                 .check_required = 0,
1321                 .check_ambiguity = 0,
1322                 .print_errors = 0,
1323         };
1324
1325         if (!cf) {
1326                 PARA_WARNING_LOG("there is no configuration to read");
1327                 return;
1328         }
1329         PARA_INFO_LOG("rereading command line options and config file");
1330         gui_cmdline_parser_ext(_argc, _argv, &conf, &params);
1331         if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0) {
1332                 PARA_EMERG_LOG("errors in config file");
1333                 finish(EXIT_FAILURE);
1334         }
1335         PARA_NOTICE_LOG("config file reloaded");
1336         if (check_key_map_args() < 0)
1337                 finish(EXIT_FAILURE);
1338 }
1339
1340 static void com_help(void)
1341 {
1342         int i;
1343
1344         for (i = 0; i < conf.key_map_given; ++i) {
1345                 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1346                 const char *handler_text = "???", *desc = NULL;
1347
1348                 if (!split_key_map(tmp, &handler, &arg)) {
1349                         free(tmp);
1350                         return;
1351                 }
1352                 switch (*handler) {
1353                         case 'i':
1354                                 handler_text = "internal";
1355                                 desc = command_list[find_cmd_byname(arg)].description;
1356                                 break;
1357                         case 'x': handler_text = "external"; break;
1358                         case 'd': handler_text = "display "; break;
1359                         case 'p': handler_text = "para    "; break;
1360                 }
1361                 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1362                         strlen(arg) < 8? "\t" : "",
1363                         desc? desc : "");
1364                 free(tmp);
1365         }
1366         for (i = 0; command_list[i].handler; i++) {
1367                 struct gui_command gc = command_list[i];
1368
1369                 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1370                         strlen(gc.name) < 8? "\t" : "",
1371                         gc.description);
1372         }
1373         print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1374                 "for more info");
1375 }
1376
1377 static void com_shrink_top_win(void)
1378 {
1379         if (top.lines <= theme.top_lines_min) {
1380                 PARA_WARNING_LOG("can not decrease top window");
1381                 return;
1382         }
1383         init_wins(top.lines - 1);
1384         wclear(top.win);
1385         print_all_items();
1386         print_in_bar(COLOR_MSG, "%s", "decreased top window");
1387 }
1388
1389 static void com_enlarge_top_win(void)
1390 {
1391         if (bot.lines < 3) {
1392                 PARA_WARNING_LOG("can not increase top window");
1393                 return;
1394         }
1395         init_wins(top.lines + 1);
1396         wclear(top.win);
1397         print_all_items();
1398         print_in_bar(COLOR_MSG, "increased top window");
1399 }
1400
1401 static void com_version(void)
1402 {
1403         print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1404                 CODENAME "\"");
1405 }
1406
1407 __noreturn static void com_quit(void)
1408 {
1409         finish(0);
1410 }
1411
1412 static void com_refresh(void)
1413 {
1414         shutdown_curses();
1415         init_curses();
1416 }
1417
1418 static void change_theme(int next)
1419 {
1420         if (next)
1421                 next_theme(&theme);
1422         else
1423                 prev_theme(&theme);
1424         /* This seems to be needed twice, why? */
1425         com_refresh();
1426         com_refresh();
1427         PARA_NOTICE_LOG("new theme: %s", theme.name);
1428 }
1429
1430 static void com_next_theme(void)
1431 {
1432         change_theme(1);
1433 }
1434
1435 static void com_prev_theme(void)
1436 {
1437         change_theme(0);
1438 }
1439
1440
1441 static void handle_command(int c)
1442 {
1443         int i;
1444
1445         /* first check user's key bindings */
1446         for (i = 0; i < conf.key_map_given; ++i) {
1447                 char *tmp, *handler, *arg;
1448
1449                 tmp = para_strdup(conf.key_map_arg[i]);
1450                 if (!split_key_map(tmp, &handler, &arg)) {
1451                         free(tmp);
1452                         return;
1453                 }
1454                 if (strcmp(tmp, km_keyname(c))) {
1455                         free(tmp);
1456                         continue;
1457                 }
1458                 if (*handler == 'd')
1459                         display_cmd(arg);
1460                 else if (*handler == 'x')
1461                         external_cmd(arg);
1462                 else if (*handler == 'p')
1463                         para_cmd(arg);
1464                 else if (*handler == 'i') {
1465                         int num = find_cmd_byname(arg);
1466                         if (num >= 0)
1467                                 command_list[num].handler();
1468                 }
1469                 free(tmp);
1470                 return;
1471         }
1472         /* not found, check internal key bindings */
1473         for (i = 0; command_list[i].handler; i++) {
1474                 if (!strcmp(km_keyname(c), command_list[i].key)) {
1475                         command_list[i].handler();
1476                         return;
1477                 }
1478         }
1479         print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1480                 km_keyname(c));
1481 }
1482
1483 int main(int argc, char *argv[])
1484 {
1485         int ret;
1486         char *cf;
1487
1488         _argc = argc;
1489         _argv = argv;
1490
1491         gui_cmdline_parser(argc, argv, &conf); /* exits on errors */
1492         HANDLE_VERSION_FLAG("gui", conf);
1493         cf = configfile_exists();
1494         if (!cf && conf.config_file_given) {
1495                 fprintf(stderr, "can not read config file %s\n",
1496                         conf.config_file_arg);
1497                 exit(EXIT_FAILURE);
1498         }
1499         if (cf) {
1500                 struct gui_cmdline_parser_params params = {
1501                         .override = 0,
1502                         .initialize = 0,
1503                         .check_required = 0,
1504                         .check_ambiguity = 0,
1505                         .print_errors = 1,
1506                 };
1507                 if (gui_cmdline_parser_config_file(cf, &conf, &params) != 0)
1508                         exit(EXIT_FAILURE);
1509         }
1510         loglevel = get_loglevel_by_name(conf.loglevel_arg);
1511         if (check_key_map_args() < 0) {
1512                 fprintf(stderr, "invalid key map\n");
1513                 exit(EXIT_FAILURE);
1514         }
1515         init_theme_or_die(conf.theme_arg, &theme);
1516         top.lines = theme.top_lines_default;
1517         setup_signal_handling();
1518         bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1519         initscr(); /* needed only once, always successful */
1520         init_curses();
1521         print_welcome();
1522         for (;;) {
1523                 print_status_bar();
1524                 ret = do_select(GETCH_MODE);
1525                 if (!ret)
1526                         continue;
1527                 print_in_bar(COLOR_MSG, " ");
1528                 handle_command(ret);
1529         }
1530 }