cmdedit.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Termios command line History and Editting.
   4  *
   5  * Copyright (c) 1986-2001 may safely be consumed by a BSD or GPL license.
   6  * Written by:   Vladimir Oleynik <vodz@usa.net>
   7  *
   8  * Used ideas:
   9  *      Adam Rogoyski    <rogoyski@cs.utexas.edu>
  10  *      Dave Cinege      <dcinege@psychosis.com>
  11  *      Jakub Jelinek (c) 1995
  12  *      Erik Andersen    <andersee@debian.org> (Majorly adjusted for busybox)
  13  *
  14  * This code is 'as is' with no warranty.
  15  *
  16  *
  17  */
  18
  19 /*
  20    Usage and Known bugs:
  21    Terminal key codes are not extensive, and more will probably
  22    need to be added. This version was created on Debian GNU/Linux 2.x.
  23    Delete, Backspace, Home, End, and the arrow keys were tested
  24    to work in an Xterm and console. Ctrl-A also works as Home.
  25    Ctrl-E also works as End.
  26
  27    Small bugs (simple effect):
  28    - not true viewing if terminal size (x*y symbols) less
  29      size (prompt + editor`s line + 2 symbols)
  30    - not true viewing if length prompt less terminal width
  31  */
  32
  33
  34 #include <stdio.h>
  35 #include <errno.h>
  36 #include <unistd.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <sys/ioctl.h>
  40 #include <ctype.h>
  41 #include <signal.h>
  42 #include <limits.h>
  43
  44 #include "busybox.h"
  45
  46 #ifdef BB_LOCALE_SUPPORT
  47 #define Isprint(c) isprint((c))
  48 #else
  49 #define Isprint(c) ( (c) >= ' ' && (c) != ((unsigned char)'\233') )
  50 #endif
  51
  52 #ifndef TEST
  53
  54 #define D(x)
  55
  56 #else
  57
  58 #define BB_FEATURE_COMMAND_EDITING
  59 #define BB_FEATURE_COMMAND_TAB_COMPLETION
  60 #define BB_FEATURE_COMMAND_USERNAME_COMPLETION
  61 #define BB_FEATURE_NONPRINTABLE_INVERSE_PUT
  62 #define BB_FEATURE_CLEAN_UP
  63
  64 #define D(x)  x
  65
  66 #endif                                                  /* TEST */
  67
  68 #ifdef BB_FEATURE_COMMAND_TAB_COMPLETION
  69 #include <dirent.h>
  70 #include <sys/stat.h>
  71 #endif
  72
  73 #ifdef BB_FEATURE_COMMAND_EDITING
  74
  75 #ifndef BB_FEATURE_COMMAND_TAB_COMPLETION
  76 #undef  BB_FEATURE_COMMAND_USERNAME_COMPLETION
  77 #endif
  78
  79 #if defined(BB_FEATURE_COMMAND_USERNAME_COMPLETION) || defined(BB_FEATURE_SH_FANCY_PROMPT)
  80 #define BB_FEATURE_GETUSERNAME_AND_HOMEDIR
  81 #endif
  82
  83 #ifdef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
  84 #       ifndef TEST
  85 #               include "pwd_grp/pwd.h"
  86 #       else
  87 #               include <pwd.h>
  88 #       endif  /* TEST */
  89 #endif                                                  /* advanced FEATURES */
  90
  91
  92
  93 struct history {
  94         char *s;
  95         struct history *p;
  96         struct history *n;
  97 };
  98
  99 /* Maximum length of the linked list for the command line history */
 100 static const int MAX_HISTORY = 15;
 101
 102 /* First element in command line list */
 103 static struct history *his_front = NULL;
 104
 105 /* Last element in command line list */
 106 static struct history *his_end = NULL;
 107
 108
 109 #include <termios.h>
 110 #define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
 111 #define getTermSettings(fd,argp) tcgetattr(fd, argp);
 112
 113 /* Current termio and the previous termio before starting sh */
 114 static struct termios initial_settings, new_settings;
 115
 116
 117 static
 118 volatile int cmdedit_termw = 80;        /* actual terminal width */
 119 static int history_counter = 0; /* Number of commands in history list */
 120 static
 121 volatile int handlers_sets = 0; /* Set next bites: */
 122
 123 enum {
 124         SET_ATEXIT = 1,         /* when atexit() has been called
 125                                    and get euid,uid,gid to fast compare */
 126         SET_TERM_HANDLERS = 2,  /* set many terminates signal handlers */
 127         SET_WCHG_HANDLERS = 4,  /* winchg signal handler */
 128         SET_RESET_TERM = 8,     /* if the terminal needs to be reset upon exit */
 129 };
 130
 131
 132 static int cmdedit_x;           /* real x terminal position */
 133 static int cmdedit_y;           /* pseudoreal y terminal position */
 134 static int cmdedit_prmt_len;    /* lenght prompt without colores string */
 135
 136 static int cursor;              /* required global for signal handler */
 137 static int len;                 /* --- "" - - "" - -"- --""-- --""--- */
 138 static char *command_ps;        /* --- "" - - "" - -"- --""-- --""--- */
 139 static
 140 #ifndef BB_FEATURE_SH_FANCY_PROMPT
 141         const
 142 #endif
 143 char *cmdedit_prompt;           /* --- "" - - "" - -"- --""-- --""--- */
 144
 145 /* Link into lash to reset context to 0 on ^C and such */
 146 extern unsigned int shell_context;
 147
 148
 149 #ifdef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
 150 static char *user_buf = "";
 151 static char *home_pwd_buf = "";
 152 static int my_euid;
 153 #endif
 154
 155 #ifdef BB_FEATURE_SH_FANCY_PROMPT
 156 static char *hostname_buf = "";
 157 static int num_ok_lines = 1;
 158 #endif
 159
 160
 161 #ifdef  BB_FEATURE_COMMAND_TAB_COMPLETION
 162
 163 #ifndef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
 164 static int my_euid;
 165 #endif
 166
 167 static int my_uid;
 168 static int my_gid;
 169
 170 #endif  /* BB_FEATURE_COMMAND_TAB_COMPLETION */
 171
 172
 173 static void cmdedit_setwidth(int w, int redraw_flg);
 174
 175 static void win_changed(int nsig)
 176 {
 177         struct winsize win = { 0, 0, 0, 0 };
 178         static __sighandler_t previous_SIGWINCH_handler;        /* for reset */
 179
 180         /*   emulate      || signal call */
 181         if (nsig == -SIGWINCH || nsig == SIGWINCH) {
 182                 ioctl(0, TIOCGWINSZ, &win);
 183                 if (win.ws_col > 0) {
 184                         cmdedit_setwidth(win.ws_col, nsig == SIGWINCH);
 185                 }
 186         }
 187         /* Unix not all standart in recall signal */
 188
 189         if (nsig == -SIGWINCH)          /* save previous handler   */
 190                 previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
 191         else if (nsig == SIGWINCH)      /* signaled called handler */
 192                 signal(SIGWINCH, win_changed);  /* set for next call       */
 193         else                                            /* nsig == 0 */
 194                 /* set previous handler    */
 195                 signal(SIGWINCH, previous_SIGWINCH_handler);    /* reset    */
 196 }
 197
 198 static void cmdedit_reset_term(void)
 199 {
 200         if ((handlers_sets & SET_RESET_TERM) != 0) {
 201 /* sparc and other have broken termios support: use old termio handling. */
 202                 setTermSettings(fileno(stdin), (void *) &initial_settings);
 203                 handlers_sets &= ~SET_RESET_TERM;
 204         }
 205         if ((handlers_sets & SET_WCHG_HANDLERS) != 0) {
 206                 /* reset SIGWINCH handler to previous (default) */
 207                 win_changed(0);
 208                 handlers_sets &= ~SET_WCHG_HANDLERS;
 209         }
 210         fflush(stdout);
 211 #ifdef BB_FEATURE_CLEAN_UP
 212         if (his_front) {
 213                 struct history *n;
 214
 215                 while (his_front != his_end) {
 216                         n = his_front->n;
 217                         free(his_front->s);
 218                         free(his_front);
 219                         his_front = n;
 220                 }
 221         }
 222 #endif
 223 }
 224
 225
 226 /* special for recount position for scroll and remove terminal margin effect */
 227 static void cmdedit_set_out_char(int next_char)
 228 {
 229
 230         int c = (int)((unsigned char) command_ps[cursor]);
 231
 232         if (c == 0)
 233                 c = ' ';        /* destroy end char? */
 234 #ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
 235         if (!Isprint(c)) {      /* Inverse put non-printable characters */
 236                 if (c >= 128)
 237                         c -= 128;
 238                 if (c < ' ')
 239                         c += '@';
 240                 if (c == 127)
 241                         c = '?';
 242                 printf("\033[7m%c\033[0m", c);
 243         } else
 244 #endif
 245                 putchar(c);
 246         if (++cmdedit_x >= cmdedit_termw) {
 247                 /* terminal is scrolled down */
 248                 cmdedit_y++;
 249                 cmdedit_x = 0;
 250
 251                 if (!next_char)
 252                         next_char = ' ';
 253                 /* destroy "(auto)margin" */
 254                 putchar(next_char);
 255                 putchar('\b');
 256         }
 257         cursor++;
 258 }
 259
 260 /* Move to end line. Bonus: rewrite line from cursor */
 261 static void input_end(void)
 262 {
 263         while (cursor < len)
 264                 cmdedit_set_out_char(0);
 265 }
 266
 267 /* Go to the next line */
 268 static void goto_new_line(void)
 269 {
 270         input_end();
 271         if (cmdedit_x)
 272                 putchar('\n');
 273 }
 274
 275
 276 static inline void out1str(const char *s)
 277 {
 278         fputs(s, stdout);
 279 }
 280 static inline void beep(void)
 281 {
 282         putchar('\007');
 283 }
 284
 285 /* Move back one charactor */
 286 /* special for slow terminal */
 287 static void input_backward(int num)
 288 {
 289         if (num > cursor)
 290                 num = cursor;
 291         cursor -= num;          /* new cursor (in command, not terminal) */
 292
 293         if (cmdedit_x >= num) {         /* no to up line */
 294                 cmdedit_x -= num;
 295                 if (num < 4)
 296                         while (num-- > 0)
 297                                 putchar('\b');
 298
 299                 else
 300                         printf("\033[%dD", num);
 301         } else {
 302                 int count_y;
 303
 304                 if (cmdedit_x) {
 305                         putchar('\r');          /* back to first terminal pos.  */
 306                         num -= cmdedit_x;       /* set previous backward        */
 307                 }
 308                 count_y = 1 + num / cmdedit_termw;
 309                 printf("\033[%dA", count_y);
 310                 cmdedit_y -= count_y;
 311                 /*  require  forward  after  uping   */
 312                 cmdedit_x = cmdedit_termw * count_y - num;
 313                 printf("\033[%dC", cmdedit_x);  /* set term cursor   */
 314         }
 315 }
 316
 317 static void put_prompt(void)
 318 {
 319         out1str(cmdedit_prompt);
 320         cmdedit_x = cmdedit_prmt_len;   /* count real x terminal position */
 321         cursor = 0;
 322 }
 323
 324 #ifndef BB_FEATURE_SH_FANCY_PROMPT
 325 static void parse_prompt(const char *prmt_ptr)
 326 {
 327         cmdedit_prompt = prmt_ptr;
 328         cmdedit_prmt_len = strlen(prmt_ptr);
 329         put_prompt();
 330 }
 331 #else
 332 static void parse_prompt(const char *prmt_ptr)
 333 {
 334         int prmt_len = 0;
 335         int sub_len = 0;
 336         char  flg_not_length = '[';
 337         char *prmt_mem_ptr = xcalloc(1, 1);
 338         char *pwd_buf = xgetcwd(0);
 339         char  buf2[PATH_MAX + 1];
 340         char  buf[2];
 341         char  c;
 342         char *pbuf;
 343
 344         if (!pwd_buf) {
 345                 pwd_buf=(char *)unknown;
 346         }
 347
 348         while (*prmt_ptr) {
 349                 pbuf    = buf;
 350                 pbuf[1] = 0;
 351                 c = *prmt_ptr++;
 352                 if (c == '\\') {
 353                         const char *cp = prmt_ptr;
 354                         int l;
 355
 356                         c = process_escape_sequence(&prmt_ptr);
 357                         if(prmt_ptr==cp) {
 358                           if (*cp == 0)
 359                                 break;
 360                           c = *prmt_ptr++;
 361                           switch (c) {
 362 #ifdef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
 363                           case 'u':
 364                                 pbuf = user_buf;
 365                                 break;
 366 #endif
 367                           case 'h':
 368                                 pbuf = hostname_buf;
 369                                 if (*pbuf == 0) {
 370                                         pbuf = xcalloc(256, 1);
 371                                         if (gethostname(pbuf, 255) < 0) {
 372                                                 strcpy(pbuf, "?");
 373                                         } else {
 374                                                 char *s = strchr(pbuf, '.');
 375
 376                                                 if (s)
 377                                                         *s = 0;
 378                                         }
 379                                         hostname_buf = pbuf;
 380                                 }
 381                                 break;
 382                           case '$':
 383                                 c = my_euid == 0 ? '#' : '$';
 384                                 break;
 385 #ifdef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
 386                           case 'w':
 387                                 pbuf = pwd_buf;
 388                                 l = strlen(home_pwd_buf);
 389                                 if (home_pwd_buf[0] != 0 &&
 390                                     strncmp(home_pwd_buf, pbuf, l) == 0 &&
 391                                     (pbuf[l]=='/' || pbuf[l]=='\0') &&
 392                                     strlen(pwd_buf+l)<PATH_MAX) {
 393                                         pbuf = buf2;
 394                                         *pbuf = '~';
 395                                         strcpy(pbuf+1, pwd_buf+l);
 396                                         }
 397                                 break;
 398 #endif
 399                           case 'W':
 400                                 pbuf = pwd_buf;
 401                                 cp = strrchr(pbuf,'/');
 402                                 if ( (cp != NULL) && (cp != pbuf) )
 403                                         pbuf += (cp-pbuf)+1;
 404                                 break;
 405                           case '!':
 406                                 snprintf(pbuf = buf2, sizeof(buf2), "%d", num_ok_lines);
 407                                 break;
 408                           case 'e': case 'E':     /* \e \E = \033 */
 409                                 c = '\033';
 410                                 break;
 411                           case 'x': case 'X':
 412                                 for (l = 0; l < 3;) {
 413                                         int h;
 414                                         buf2[l++] = *prmt_ptr;
 415                                         buf2[l] = 0;
 416                                         h = strtol(buf2, &pbuf, 16);
 417                                         if (h > UCHAR_MAX || (pbuf - buf2) < l) {
 418                                                 l--;
 419                                                 break;
 420                                         }
 421                                         prmt_ptr++;
 422                                 }
 423                                 buf2[l] = 0;
 424                                 c = (char)strtol(buf2, 0, 16);
 425                                 if(c==0)
 426                                         c = '?';
 427                                 pbuf = buf;
 428                                 break;
 429                           case '[': case ']':
 430                                 if (c == flg_not_length) {
 431                                         flg_not_length = flg_not_length == '[' ? ']' : '[';
 432                                         continue;
 433                                 }
 434                                 break;
 435                           }
 436                         }
 437                 }
 438                 if(pbuf == buf)
 439                         *pbuf = c;
 440                 prmt_len += strlen(pbuf);
 441                 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
 442                 if (flg_not_length == ']')
 443                         sub_len++;
 444         }
 445         free(pwd_buf);
 446         cmdedit_prompt = prmt_mem_ptr;
 447         cmdedit_prmt_len = prmt_len - sub_len;
 448         put_prompt();
 449 }
 450 #endif
 451
 452
 453 /* draw promt, editor line, and clear tail */
 454 static void redraw(int y, int back_cursor)
 455 {
 456         if (y > 0)                              /* up to start y */
 457                 printf("\033[%dA", y);
 458         cmdedit_y = 0;                          /* new quasireal y */
 459         putchar('\r');
 460         put_prompt();
 461         input_end();                            /* rewrite */
 462         printf("\033[J");                       /* destroy tail after cursor */
 463         input_backward(back_cursor);
 464 }
 465
 466 /* Delete the char in front of the cursor */
 467 static void input_delete(void)
 468 {
 469         int j = cursor;
 470
 471         if (j == len)
 472                 return;
 473
 474         strcpy(command_ps + j, command_ps + j + 1);
 475         len--;
 476         input_end();                    /* rewtite new line */
 477         cmdedit_set_out_char(0);        /* destroy end char */
 478         input_backward(cursor - j);     /* back to old pos cursor */
 479 }
 480
 481 /* Delete the char in back of the cursor */
 482 static void input_backspace(void)
 483 {
 484         if (cursor > 0) {
 485                 input_backward(1);
 486                 input_delete();
 487         }
 488 }
 489
 490
 491 /* Move forward one charactor */
 492 static void input_forward(void)
 493 {
 494         if (cursor < len)
 495                 cmdedit_set_out_char(command_ps[cursor + 1]);
 496 }
 497
 498
 499 static void clean_up_and_die(int sig)
 500 {
 501         goto_new_line();
 502         if (sig != SIGINT)
 503                 exit(EXIT_SUCCESS);     /* cmdedit_reset_term() called in atexit */
 504         cmdedit_reset_term();
 505 }
 506
 507 static void cmdedit_setwidth(int w, int redraw_flg)
 508 {
 509         cmdedit_termw = cmdedit_prmt_len + 2;
 510         if (w <= cmdedit_termw) {
 511                 cmdedit_termw = cmdedit_termw % w;
 512         }
 513         if (w > cmdedit_termw) {
 514                 cmdedit_termw = w;
 515
 516                 if (redraw_flg) {
 517                         /* new y for current cursor */
 518                         int new_y = (cursor + cmdedit_prmt_len) / w;
 519
 520                         /* redraw */
 521                         redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), len - cursor);
 522                         fflush(stdout);
 523                 }
 524         }
 525 }
 526
 527 extern void cmdedit_init(void)
 528 {
 529         cmdedit_prmt_len = 0;
 530         if ((handlers_sets & SET_WCHG_HANDLERS) == 0) {
 531                 /* emulate usage handler to set handler and call yours work */
 532                 win_changed(-SIGWINCH);
 533                 handlers_sets |= SET_WCHG_HANDLERS;
 534         }
 535
 536         if ((handlers_sets & SET_ATEXIT) == 0) {
 537 #ifdef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
 538                 struct passwd *entry;
 539
 540                 my_euid = geteuid();
 541                 entry = getpwuid(my_euid);
 542                 if (entry) {
 543                         user_buf = xstrdup(entry->pw_name);
 544                         home_pwd_buf = xstrdup(entry->pw_dir);
 545                 }
 546 #endif
 547
 548 #ifdef  BB_FEATURE_COMMAND_TAB_COMPLETION
 549
 550 #ifndef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
 551                 my_euid = geteuid();
 552 #endif
 553                 my_uid = getuid();
 554                 my_gid = getgid();
 555 #endif  /* BB_FEATURE_COMMAND_TAB_COMPLETION */
 556                 handlers_sets |= SET_ATEXIT;
 557                 atexit(cmdedit_reset_term);     /* be sure to do this only once */
 558         }
 559
 560         if ((handlers_sets & SET_TERM_HANDLERS) == 0) {
 561                 signal(SIGKILL, clean_up_and_die);
 562                 signal(SIGINT, clean_up_and_die);
 563                 signal(SIGQUIT, clean_up_and_die);
 564                 signal(SIGTERM, clean_up_and_die);
 565                 handlers_sets |= SET_TERM_HANDLERS;
 566         }
 567 }
 568
 569 #ifdef BB_FEATURE_COMMAND_TAB_COMPLETION
 570
 571 static int is_execute(const struct stat *st)
 572 {
 573         if ((!my_euid && (st->st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) ||
 574                 (my_uid == st->st_uid && (st->st_mode & S_IXUSR)) ||
 575                 (my_gid == st->st_gid && (st->st_mode & S_IXGRP)) ||
 576                 (st->st_mode & S_IXOTH)) return TRUE;
 577         return FALSE;
 578 }
 579
 580 #ifdef BB_FEATURE_COMMAND_USERNAME_COMPLETION
 581
 582 static char **username_tab_completion(char *ud, int *num_matches)
 583 {
 584         struct passwd *entry;
 585         int userlen;
 586         char *temp;
 587
 588
 589         ud++;                           /* ~user/... to user/... */
 590         userlen = strlen(ud);
 591
 592         if (num_matches == 0) {         /* "~/..." or "~user/..." */
 593                 char *sav_ud = ud - 1;
 594                 char *home = 0;
 595
 596                 if (*ud == '/') {       /* "~/..."     */
 597                         home = home_pwd_buf;
 598                 } else {
 599                         /* "~user/..." */
 600                         temp = strchr(ud, '/');
 601                         *temp = 0;              /* ~user\0 */
 602                         entry = getpwnam(ud);
 603                         *temp = '/';            /* restore ~user/... */
 604                         ud = temp;
 605                         if (entry)
 606                                 home = entry->pw_dir;
 607                 }
 608                 if (home) {
 609                         if ((userlen + strlen(home) + 1) < BUFSIZ) {
 610                                 char temp2[BUFSIZ];     /* argument size */
 611
 612                                 /* /home/user/... */
 613                                 sprintf(temp2, "%s%s", home, ud);
 614                                 strcpy(sav_ud, temp2);
 615                         }
 616                 }
 617                 return 0;       /* void, result save to argument :-) */
 618         } else {
 619                 /* "~[^/]*" */
 620                 char **matches = (char **) NULL;
 621                 int nm = 0;
 622
 623                 setpwent();
 624
 625                 while ((entry = getpwent()) != NULL) {
 626                         /* Null usernames should result in all users as possible completions. */
 627                         if ( /*!userlen || */ !strncmp(ud, entry->pw_name, userlen)) {
 628
 629                                 temp = xmalloc(3 + strlen(entry->pw_name));
 630                                 sprintf(temp, "~%s/", entry->pw_name);
 631                                 matches = xrealloc(matches, (nm + 1) * sizeof(char *));
 632
 633                                 matches[nm++] = temp;
 634                         }
 635                 }
 636
 637                 endpwent();
 638                 (*num_matches) = nm;
 639                 return (matches);
 640         }
 641 }
 642 #endif  /* BB_FEATURE_COMMAND_USERNAME_COMPLETION */
 643
 644 enum {
 645         FIND_EXE_ONLY = 0,
 646         FIND_DIR_ONLY = 1,
 647         FIND_FILE_ONLY = 2,
 648 };
 649
 650 static int path_parse(char ***p, int flags)
 651 {
 652         int npth;
 653         char *tmp;
 654         char *pth;
 655
 656         /* if not setenv PATH variable, to search cur dir "." */
 657         if (flags != FIND_EXE_ONLY || (pth = getenv("PATH")) == 0 ||
 658                 /* PATH=<empty> or PATH=:<empty> */
 659                 *pth == 0 || (*pth == ':' && *(pth + 1) == 0)) {
 660                 return 1;
 661         }
 662
 663         tmp = pth;
 664         npth = 0;
 665
 666         for (;;) {
 667                 npth++;                 /* count words is + 1 count ':' */
 668                 tmp = strchr(tmp, ':');
 669                 if (tmp) {
 670                         if (*++tmp == 0)
 671                                 break;  /* :<empty> */
 672                 } else
 673                         break;
 674         }
 675
 676         *p = xmalloc(npth * sizeof(char *));
 677
 678         tmp = pth;
 679         (*p)[0] = xstrdup(tmp);
 680         npth = 1;                       /* count words is + 1 count ':' */
 681
 682         for (;;) {
 683                 tmp = strchr(tmp, ':');
 684                 if (tmp) {
 685                         (*p)[0][(tmp - pth)] = 0;       /* ':' -> '\0' */
 686                         if (*++tmp == 0)
 687                                 break;                  /* :<empty> */
 688                 } else
 689                         break;
 690                 (*p)[npth++] = &(*p)[0][(tmp - pth)];   /* p[next]=p[0][&'\0'+1] */
 691         }
 692
 693         return npth;
 694 }
 695
 696 static char *add_quote_for_spec_chars(char *found)
 697 {
 698         int l = 0;
 699         char *s = xmalloc((strlen(found) + 1) * 2);
 700
 701         while (*found) {
 702                 if (strchr(" `\"#$%^&*()=+{}[]:;\'|\\<>", *found))
 703                         s[l++] = '\\';
 704                 s[l++] = *found++;
 705         }
 706         s[l] = 0;
 707         return s;
 708 }
 709
 710 static char **exe_n_cwd_tab_completion(char *command, int *num_matches,
 711                                         int type)
 712 {
 713
 714         char **matches = 0;
 715         DIR *dir;
 716         struct dirent *next;
 717         char dirbuf[BUFSIZ];
 718         int nm = *num_matches;
 719         struct stat st;
 720         char *path1[1];
 721         char **paths = path1;
 722         int npaths;
 723         int i;
 724         char *found;
 725         char *pfind = strrchr(command, '/');
 726
 727         path1[0] = ".";
 728
 729         if (pfind == NULL) {
 730                 /* no dir, if flags==EXE_ONLY - get paths, else "." */
 731                 npaths = path_parse(&paths, type);
 732                 pfind = command;
 733         } else {
 734                 /* with dir */
 735                 /* save for change */
 736                 strcpy(dirbuf, command);
 737                 /* set dir only */
 738                 dirbuf[(pfind - command) + 1] = 0;
 739 #ifdef BB_FEATURE_COMMAND_USERNAME_COMPLETION
 740                 if (dirbuf[0] == '~')   /* ~/... or ~user/... */
 741                         username_tab_completion(dirbuf, 0);
 742 #endif
 743                 /* "strip" dirname in command */
 744                 pfind++;
 745
 746                 paths[0] = dirbuf;
 747                 npaths = 1;                             /* only 1 dir */
 748         }
 749
 750         for (i = 0; i < npaths; i++) {
 751
 752                 dir = opendir(paths[i]);
 753                 if (!dir)                       /* Don't print an error */
 754                         continue;
 755
 756                 while ((next = readdir(dir)) != NULL) {
 757                         char *str_found = next->d_name;
 758
 759                         /* matched ? */
 760                         if (strncmp(str_found, pfind, strlen(pfind)))
 761                                 continue;
 762                         /* not see .name without .match */
 763                         if (*str_found == '.' && *pfind == 0) {
 764                                 if (*paths[i] == '/' && paths[i][1] == 0
 765                                         && str_found[1] == 0) str_found = "";   /* only "/" */
 766                                 else
 767                                         continue;
 768                         }
 769                         found = concat_path_file(paths[i], str_found);
 770                         /* hmm, remover in progress? */
 771                         if (stat(found, &st) < 0)
 772                                 goto cont;
 773                         /* find with dirs ? */
 774                         if (paths[i] != dirbuf)
 775                                 strcpy(found, next->d_name);    /* only name */
 776                         if (S_ISDIR(st.st_mode)) {
 777                                 /* name is directory      */
 778                                 str_found = found;
 779                                 found = concat_path_file(found, "");
 780                                 free(str_found);
 781                                 str_found = add_quote_for_spec_chars(found);
 782                         } else {
 783                                 /* not put found file if search only dirs for cd */
 784                                 if (type == FIND_DIR_ONLY)
 785                                         goto cont;
 786                                 str_found = add_quote_for_spec_chars(found);
 787                                 if (type == FIND_FILE_ONLY ||
 788                                         (type == FIND_EXE_ONLY && is_execute(&st) == TRUE))
 789                                         strcat(str_found, " ");
 790                         }
 791                         /* Add it to the list */
 792                         matches = xrealloc(matches, (nm + 1) * sizeof(char *));
 793
 794                         matches[nm++] = str_found;
 795 cont:
 796                         free(found);
 797                 }
 798                 closedir(dir);
 799         }
 800         if (paths != path1) {
 801                 free(paths[0]);                 /* allocated memory only in first member */
 802                 free(paths);
 803         }
 804         *num_matches = nm;
 805         return (matches);
 806 }
 807
 808 static int match_compare(const void *a, const void *b)
 809 {
 810         return strcmp(*(char **) a, *(char **) b);
 811 }
 812
 813
 814
 815 #define QUOT    (UCHAR_MAX+1)
 816
 817 #define collapse_pos(is, in) { \
 818         memcpy(int_buf+is, int_buf+in, (BUFSIZ+1-is-in)*sizeof(int)); \
 819         memcpy(pos_buf+is, pos_buf+in, (BUFSIZ+1-is-in)*sizeof(int)); }
 820
 821 static int find_match(char *matchBuf, int *len_with_quotes)
 822 {
 823         int i, j;
 824         int command_mode;
 825         int c, c2;
 826         int int_buf[BUFSIZ + 1];
 827         int pos_buf[BUFSIZ + 1];
 828
 829         /* set to integer dimension characters and own positions */
 830         for (i = 0;; i++) {
 831                 int_buf[i] = (int) ((unsigned char) matchBuf[i]);
 832                 if (int_buf[i] == 0) {
 833                         pos_buf[i] = -1;        /* indicator end line */
 834                         break;
 835                 } else
 836                         pos_buf[i] = i;
 837         }
 838
 839         /* mask \+symbol and convert '\t' to ' ' */
 840         for (i = j = 0; matchBuf[i]; i++, j++)
 841                 if (matchBuf[i] == '\\') {
 842                         collapse_pos(j, j + 1);
 843                         int_buf[j] |= QUOT;
 844                         i++;
 845 #ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
 846                         if (matchBuf[i] == '\t')        /* algorithm equivalent */
 847                                 int_buf[j] = ' ' | QUOT;
 848 #endif
 849                 }
 850 #ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
 851                 else if (matchBuf[i] == '\t')
 852                         int_buf[j] = ' ';
 853 #endif
 854
 855         /* mask "symbols" or 'symbols' */
 856         c2 = 0;
 857         for (i = 0; int_buf[i]; i++) {
 858                 c = int_buf[i];
 859                 if (c == '\'' || c == '"') {
 860                         if (c2 == 0)
 861                                 c2 = c;
 862                         else {
 863                                 if (c == c2)
 864                                         c2 = 0;
 865                                 else
 866                                         int_buf[i] |= QUOT;
 867                         }
 868                 } else if (c2 != 0 && c != '$')
 869                         int_buf[i] |= QUOT;
 870         }
 871
 872         /* skip commands with arguments if line have commands delimiters */
 873         /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */
 874         for (i = 0; int_buf[i]; i++) {
 875                 c = int_buf[i];
 876                 c2 = int_buf[i + 1];
 877                 j = i ? int_buf[i - 1] : -1;
 878                 command_mode = 0;
 879                 if (c == ';' || c == '&' || c == '|') {
 880                         command_mode = 1 + (c == c2);
 881                         if (c == '&') {
 882                                 if (j == '>' || j == '<')
 883                                         command_mode = 0;
 884                         } else if (c == '|' && j == '>')
 885                                 command_mode = 0;
 886                 }
 887                 if (command_mode) {
 888                         collapse_pos(0, i + command_mode);
 889                         i = -1;                         /* hack incremet */
 890                 }
 891         }
 892         /* collapse `command...` */
 893         for (i = 0; int_buf[i]; i++)
 894                 if (int_buf[i] == '`') {
 895                         for (j = i + 1; int_buf[j]; j++)
 896                                 if (int_buf[j] == '`') {
 897                                         collapse_pos(i, j + 1);
 898                                         j = 0;
 899                                         break;
 900                                 }
 901                         if (j) {
 902                                 /* not found close ` - command mode, collapse all previous */
 903                                 collapse_pos(0, i + 1);
 904                                 break;
 905                         } else
 906                                 i--;                    /* hack incremet */
 907                 }
 908
 909         /* collapse (command...(command...)...) or {command...{command...}...} */
 910         c = 0;                                          /* "recursive" level */
 911         c2 = 0;
 912         for (i = 0; int_buf[i]; i++)
 913                 if (int_buf[i] == '(' || int_buf[i] == '{') {
 914                         if (int_buf[i] == '(')
 915                                 c++;
 916                         else
 917                                 c2++;
 918                         collapse_pos(0, i + 1);
 919                         i = -1;                         /* hack incremet */
 920                 }
 921         for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++)
 922                 if ((int_buf[i] == ')' && c > 0) || (int_buf[i] == '}' && c2 > 0)) {
 923                         if (int_buf[i] == ')')
 924                                 c--;
 925                         else
 926                                 c2--;
 927                         collapse_pos(0, i + 1);
 928                         i = -1;                         /* hack incremet */
 929                 }
 930
 931         /* skip first not quote space */
 932         for (i = 0; int_buf[i]; i++)
 933                 if (int_buf[i] != ' ')
 934                         break;
 935         if (i)
 936                 collapse_pos(0, i);
 937
 938         /* set find mode for completion */
 939         command_mode = FIND_EXE_ONLY;
 940         for (i = 0; int_buf[i]; i++)
 941                 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
 942                         if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
 943                                 && matchBuf[pos_buf[0]]=='c'
 944                                 && matchBuf[pos_buf[1]]=='d' )
 945                                 command_mode = FIND_DIR_ONLY;
 946                         else {
 947                                 command_mode = FIND_FILE_ONLY;
 948                                 break;
 949                         }
 950                 }
 951         /* "strlen" */
 952         for (i = 0; int_buf[i]; i++);
 953         /* find last word */
 954         for (--i; i >= 0; i--) {
 955                 c = int_buf[i];
 956                 if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
 957                         collapse_pos(0, i + 1);
 958                         break;
 959                 }
 960         }
 961         /* skip first not quoted '\'' or '"' */
 962         for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++);
 963         /* collapse quote or unquote // or /~ */
 964         while ((int_buf[i] & ~QUOT) == '/' &&
 965                         ((int_buf[i + 1] & ~QUOT) == '/'
 966                          || (int_buf[i + 1] & ~QUOT) == '~')) {
 967                 i++;
 968         }
 969
 970         /* set only match and destroy quotes */
 971         j = 0;
 972         for (c = 0; pos_buf[i] >= 0; i++) {
 973                 matchBuf[c++] = matchBuf[pos_buf[i]];
 974                 j = pos_buf[i] + 1;
 975         }
 976         matchBuf[c] = 0;
 977         /* old lenght matchBuf with quotes symbols */
 978         *len_with_quotes = j ? j - pos_buf[0] : 0;
 979
 980         return command_mode;
 981 }
 982
 983
 984 static void input_tab(int *lastWasTab)
 985 {
 986         /* Do TAB completion */
 987         static int num_matches;
 988         static char **matches;
 989
 990         if (lastWasTab == 0) {          /* free all memory */
 991                 if (matches) {
 992                         while (num_matches > 0)
 993                                 free(matches[--num_matches]);
 994                         free(matches);
 995                         matches = (char **) NULL;
 996                 }
 997                 return;
 998         }
 999         if (*lastWasTab == FALSE) {
1000
1001                 char *tmp;
1002                 int len_found;
1003                 char matchBuf[BUFSIZ];
1004                 int find_type;
1005                 int recalc_pos;
1006
1007                 *lastWasTab = TRUE;             /* flop trigger */
1008
1009                 /* Make a local copy of the string -- up
1010                  * to the position of the cursor */
1011                 tmp = strncpy(matchBuf, command_ps, cursor);
1012                 tmp[cursor] = 0;
1013
1014                 find_type = find_match(matchBuf, &recalc_pos);
1015
1016                 /* Free up any memory already allocated */
1017                 input_tab(0);
1018
1019 #ifdef BB_FEATURE_COMMAND_USERNAME_COMPLETION
1020                 /* If the word starts with `~' and there is no slash in the word,
1021                  * then try completing this word as a username. */
1022
1023                 if (matchBuf[0] == '~' && strchr(matchBuf, '/') == 0)
1024                         matches = username_tab_completion(matchBuf, &num_matches);
1025 #endif
1026                 /* Try to match any executable in our path and everything
1027                  * in the current working directory that matches.  */
1028                 if (!matches)
1029                         matches =
1030                                 exe_n_cwd_tab_completion(matchBuf,
1031                                         &num_matches, find_type);
1032                 /* Remove duplicate found */
1033                 if(matches) {
1034                         int i, j;
1035                         /* bubble */
1036                         for(i=0; i<(num_matches-1); i++)
1037                                 for(j=i+1; j<num_matches; j++)
1038                                         if(matches[i]!=0 && matches[j]!=0 &&
1039                                                 strcmp(matches[i], matches[j])==0) {
1040                                                         free(matches[j]);
1041                                                         matches[j]=0;
1042                                         }
1043                         j=num_matches;
1044                         num_matches = 0;
1045                         for(i=0; i<j; i++)
1046                                 if(matches[i]) {
1047                                         if(!strcmp(matches[i], "./"))
1048                                                 matches[i][1]=0;
1049                                         else if(!strcmp(matches[i], "../"))
1050                                                 matches[i][2]=0;
1051                                         matches[num_matches++]=matches[i];
1052                                 }
1053                 }
1054                 /* Did we find exactly one match? */
1055                 if (!matches || num_matches > 1) {
1056                         char *tmp1;
1057
1058                         beep();
1059                         if (!matches)
1060                                 return;         /* not found */
1061                         /* sort */
1062                         qsort(matches, num_matches, sizeof(char *), match_compare);
1063
1064                         /* find minimal match */
1065                         tmp = xstrdup(matches[0]);
1066                         for (tmp1 = tmp; *tmp1; tmp1++)
1067                                 for (len_found = 1; len_found < num_matches; len_found++)
1068                                         if (matches[len_found][(tmp1 - tmp)] != *tmp1) {
1069                                                 *tmp1 = 0;
1070                                                 break;
1071                                         }
1072                         if (*tmp == 0) {        /* have unique */
1073                                 free(tmp);
1074                                 return;
1075                         }
1076                 } else {                        /* one match */
1077                         tmp = matches[0];
1078                         /* for next completion current found */
1079                         *lastWasTab = FALSE;
1080                 }
1081
1082                 len_found = strlen(tmp);
1083                 /* have space to placed match? */
1084                 if ((len_found - strlen(matchBuf) + len) < BUFSIZ) {
1085
1086                         /* before word for match   */
1087                         command_ps[cursor - recalc_pos] = 0;
1088                         /* save   tail line        */
1089                         strcpy(matchBuf, command_ps + cursor);
1090                         /* add    match            */
1091                         strcat(command_ps, tmp);
1092                         /* add    tail             */
1093                         strcat(command_ps, matchBuf);
1094                         /* back to begin word for match    */
1095                         input_backward(recalc_pos);
1096                         /* new pos                         */
1097                         recalc_pos = cursor + len_found;
1098                         /* new len                         */
1099                         len = strlen(command_ps);
1100                         /* write out the matched command   */
1101                         redraw(cmdedit_y, len - recalc_pos);
1102                 }
1103                 if (tmp != matches[0])
1104                         free(tmp);
1105         } else {
1106                 /* Ok -- the last char was a TAB.  Since they
1107                  * just hit TAB again, print a list of all the
1108                  * available choices... */
1109                 if (matches && num_matches > 0) {
1110                         int i, col, l;
1111                         int sav_cursor = cursor;        /* change goto_new_line() */
1112
1113                         /* Go to the next line */
1114                         goto_new_line();
1115                         for (i = 0, col = 0; i < num_matches; i++) {
1116                                 l = strlen(matches[i]);
1117                                 if (l < 14)
1118                                         l = 14;
1119                                 printf("%-14s  ", matches[i]);
1120                                 if ((l += 2) > 16)
1121                                         while (l % 16) {
1122                                                 putchar(' ');
1123                                                 l++;
1124                                         }
1125                                 col += l;
1126                                 col -= (col / cmdedit_termw) * cmdedit_termw;
1127                                 if (col > 60 && matches[i + 1] != NULL) {
1128                                         putchar('\n');
1129                                         col = 0;
1130                                 }
1131                         }
1132                         /* Go to the next line and rewrite */
1133                         putchar('\n');
1134                         redraw(0, len - sav_cursor);
1135                 }
1136         }
1137 }
1138 #endif  /* BB_FEATURE_COMMAND_TAB_COMPLETION */
1139
1140 static void get_previous_history(struct history **hp, struct history *p)
1141 {
1142         if ((*hp)->s)
1143                 free((*hp)->s);
1144         (*hp)->s = xstrdup(command_ps);
1145         *hp = p;
1146 }
1147
1148 static inline void get_next_history(struct history **hp)
1149 {
1150         get_previous_history(hp, (*hp)->n);
1151 }
1152
1153 enum {
1154         ESC = 27,
1155         DEL = 127,
1156 };
1157
1158
1159 /*
1160  * This function is used to grab a character buffer
1161  * from the input file descriptor and allows you to
1162  * a string with full command editing (sortof like
1163  * a mini readline).
1164  *
1165  * The following standard commands are not implemented:
1166  * ESC-b -- Move back one word
1167  * ESC-f -- Move forward one word
1168  * ESC-d -- Delete back one word
1169  * ESC-h -- Delete forward one word
1170  * CTL-t -- Transpose two characters
1171  *
1172  * Furthermore, the "vi" command editing keys are not implemented.
1173  *
1174  */
1175
1176 extern void cmdedit_read_input(char *prompt, char command[BUFSIZ])
1177 {
1178
1179         int break_out = 0;
1180         int lastWasTab = FALSE;
1181         unsigned char c = 0;
1182         struct history *hp = his_end;
1183
1184         /* prepare before init handlers */
1185         cmdedit_y = 0;  /* quasireal y, not true work if line > xt*yt */
1186         len = 0;
1187         command_ps = command;
1188
1189         if (new_settings.c_cc[VERASE] == 0) {     /* first call */
1190
1191                 getTermSettings(0, (void *) &initial_settings);
1192                 memcpy(&new_settings, &initial_settings, sizeof(struct termios));
1193                 new_settings.c_lflag &= ~ICANON;        /* unbuffered input */
1194                 /* Turn off echoing and CTRL-C, so we can trap it */
1195                 new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
1196 #ifndef linux
1197                 /* Hmm, in linux c_cc[] not parsed if set ~ICANON */
1198                 new_settings.c_cc[VMIN] = 1;
1199                 new_settings.c_cc[VTIME] = 0;
1200                 /* Turn off CTRL-C, so we can trap it */
1201 #       ifndef _POSIX_VDISABLE
1202 #               define _POSIX_VDISABLE '\0'
1203 #       endif
1204                 new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
1205 #endif
1206         }
1207
1208         command[0] = 0;
1209
1210         setTermSettings(0, (void *) &new_settings);
1211         handlers_sets |= SET_RESET_TERM;
1212
1213         /* Now initialize things */
1214         cmdedit_init();
1215         /* Print out the command prompt */
1216         parse_prompt(prompt);
1217
1218         while (1) {
1219
1220                 fflush(stdout);                 /* buffered out to fast */
1221
1222                 if (read(0, &c, 1) < 1)
1223                         /* if we can't read input then exit */
1224                         goto prepare_to_die;
1225
1226                 switch (c) {
1227                 case '\n':
1228                 case '\r':
1229                         /* Enter */
1230                         goto_new_line();
1231                         break_out = 1;
1232                         break;
1233                 case 1:
1234                         /* Control-a -- Beginning of line */
1235                         input_backward(cursor);
1236                         break;
1237                 case 2:
1238                         /* Control-b -- Move back one character */
1239                         input_backward(1);
1240                         break;
1241                 case 3:
1242                         /* Control-c -- stop gathering input */
1243
1244                         /* Link into lash to reset context to 0 on ^C and such */
1245                         shell_context = 0;
1246
1247                         /* Go to the next line */
1248                         goto_new_line();
1249                         command[0] = 0;
1250
1251                         return;
1252                 case 4:
1253                         /* Control-d -- Delete one character, or exit
1254                          * if the len=0 and no chars to delete */
1255                         if (len == 0) {
1256 prepare_to_die:
1257                                 printf("exit");
1258                                 clean_up_and_die(0);
1259                         } else {
1260                                 input_delete();
1261                         }
1262                         break;
1263                 case 5:
1264                         /* Control-e -- End of line */
1265                         input_end();
1266                         break;
1267                 case 6:
1268                         /* Control-f -- Move forward one character */
1269                         input_forward();
1270                         break;
1271                 case '\b':
1272                 case DEL:
1273                         /* Control-h and DEL */
1274                         input_backspace();
1275                         break;
1276                 case '\t':
1277 #ifdef BB_FEATURE_COMMAND_TAB_COMPLETION
1278                         input_tab(&lastWasTab);
1279 #endif
1280                         break;
1281                 case 14:
1282                         /* Control-n -- Get next command in history */
1283                         if (hp && hp->n && hp->n->s) {
1284                                 get_next_history(&hp);
1285                                 goto rewrite_line;
1286                         } else {
1287                                 beep();
1288                         }
1289                         break;
1290                 case 16:
1291                         /* Control-p -- Get previous command from history */
1292                         if (hp && hp->p) {
1293                                 get_previous_history(&hp, hp->p);
1294                                 goto rewrite_line;
1295                         } else {
1296                                 beep();
1297                         }
1298                         break;
1299                 case 21:
1300                         /* Control-U -- Clear line before cursor */
1301                         if (cursor) {
1302                                 strcpy(command, command + cursor);
1303                                 redraw(cmdedit_y, len -= cursor);
1304                         }
1305                         break;
1306
1307                 case ESC:{
1308                         /* escape sequence follows */
1309                         if (read(0, &c, 1) < 1)
1310                                 return;
1311                         /* different vt100 emulations */
1312                         if (c == '[' || c == 'O') {
1313                                 if (read(0, &c, 1) < 1)
1314                                         return;
1315                         }
1316                         switch (c) {
1317 #ifdef BB_FEATURE_COMMAND_TAB_COMPLETION
1318                         case '\t':                      /* Alt-Tab */
1319
1320                                 input_tab(&lastWasTab);
1321                                 break;
1322 #endif
1323                         case 'A':
1324                                 /* Up Arrow -- Get previous command from history */
1325                                 if (hp && hp->p) {
1326                                         get_previous_history(&hp, hp->p);
1327                                         goto rewrite_line;
1328                                 } else {
1329                                         beep();
1330                                 }
1331                                 break;
1332                         case 'B':
1333                                 /* Down Arrow -- Get next command in history */
1334                                 if (hp && hp->n && hp->n->s) {
1335                                         get_next_history(&hp);
1336                                         goto rewrite_line;
1337                                 } else {
1338                                         beep();
1339                                 }
1340                                 break;
1341
1342                                 /* Rewrite the line with the selected history item */
1343                           rewrite_line:
1344                                 /* change command */
1345                                 len = strlen(strcpy(command, hp->s));
1346                                 /* redraw and go to end line */
1347                                 redraw(cmdedit_y, 0);
1348                                 break;
1349                         case 'C':
1350                                 /* Right Arrow -- Move forward one character */
1351                                 input_forward();
1352                                 break;
1353                         case 'D':
1354                                 /* Left Arrow -- Move back one character */
1355                                 input_backward(1);
1356                                 break;
1357                         case '3':
1358                                 /* Delete */
1359                                 input_delete();
1360                                 break;
1361                         case '1':
1362                         case 'H':
1363                                 /* Home (Ctrl-A) */
1364                                 input_backward(cursor);
1365                                 break;
1366                         case '4':
1367                         case 'F':
1368                                 /* End (Ctrl-E) */
1369                                 input_end();
1370                                 break;
1371                         default:
1372                                 if (!(c >= '1' && c <= '9'))
1373                                         c = 0;
1374                                 beep();
1375                         }
1376                         if (c >= '1' && c <= '9')
1377                                 do
1378                                         if (read(0, &c, 1) < 1)
1379                                                 return;
1380                                 while (c != '~');
1381                         break;
1382                 }
1383
1384                 default:        /* If it's regular input, do the normal thing */
1385 #ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
1386                         /* Control-V -- Add non-printable symbol */
1387                         if (c == 22) {
1388                                 if (read(0, &c, 1) < 1)
1389                                         return;
1390                                 if (c == 0) {
1391                                         beep();
1392                                         break;
1393                                 }
1394                         } else
1395 #endif
1396                         if (!Isprint(c))        /* Skip non-printable characters */
1397                                 break;
1398
1399                         if (len >= (BUFSIZ - 2))        /* Need to leave space for enter */
1400                                 break;
1401
1402                         len++;
1403
1404                         if (cursor == (len - 1)) {      /* Append if at the end of the line */
1405                                 *(command + cursor) = c;
1406                                 *(command + cursor + 1) = 0;
1407                                 cmdedit_set_out_char(0);
1408                         } else {                        /* Insert otherwise */
1409                                 int sc = cursor;
1410
1411                                 memmove(command + sc + 1, command + sc, len - sc);
1412                                 *(command + sc) = c;
1413                                 sc++;
1414                                 /* rewrite from cursor */
1415                                 input_end();
1416                                 /* to prev x pos + 1 */
1417                                 input_backward(cursor - sc);
1418                         }
1419
1420                         break;
1421                 }
1422                 if (break_out)                  /* Enter is the command terminator, no more input. */
1423                         break;
1424
1425                 if (c != '\t')
1426                         lastWasTab = FALSE;
1427         }
1428
1429         setTermSettings(0, (void *) &initial_settings);
1430         handlers_sets &= ~SET_RESET_TERM;
1431
1432         /* Handle command history log */
1433         if (len) {                                      /* no put empty line */
1434
1435                 struct history *h = his_end;
1436                 char *ss;
1437
1438                 ss = xstrdup(command);  /* duplicate */
1439
1440                 if (h == 0) {
1441                         /* No previous history -- this memory is never freed */
1442                         h = his_front = xmalloc(sizeof(struct history));
1443                         h->n = xmalloc(sizeof(struct history));
1444
1445                         h->p = NULL;
1446                         h->s = ss;
1447                         h->n->p = h;
1448                         h->n->n = NULL;
1449                         h->n->s = NULL;
1450                         his_end = h->n;
1451                         history_counter++;
1452                 } else {
1453                         /* Add a new history command -- this memory is never freed */
1454                         h->n = xmalloc(sizeof(struct history));
1455
1456                         h->n->p = h;
1457                         h->n->n = NULL;
1458                         h->n->s = NULL;
1459                         h->s = ss;
1460                         his_end = h->n;
1461
1462                         /* After max history, remove the oldest command */
1463                         if (history_counter >= MAX_HISTORY) {
1464
1465                                 struct history *p = his_front->n;
1466
1467                                 p->p = NULL;
1468                                 free(his_front->s);
1469                                 free(his_front);
1470                                 his_front = p;
1471                         } else {
1472                                 history_counter++;
1473                         }
1474                 }
1475 #if defined(BB_FEATURE_SH_FANCY_PROMPT)
1476                 num_ok_lines++;
1477 #endif
1478         }
1479         command[len++] = '\n';          /* set '\n' */
1480         command[len] = 0;
1481 #if defined(BB_FEATURE_CLEAN_UP) && defined(BB_FEATURE_COMMAND_TAB_COMPLETION)
1482         input_tab(0);                           /* strong free */
1483 #endif
1484 #if defined(BB_FEATURE_SH_FANCY_PROMPT)
1485         free(cmdedit_prompt);
1486 #endif
1487         return;
1488 }
1489
1490
1491 /* Undo the effects of cmdedit_init(). */
1492 extern void cmdedit_terminate(void)
1493 {
1494         cmdedit_reset_term();
1495         if ((handlers_sets & SET_TERM_HANDLERS) != 0) {
1496                 signal(SIGKILL, SIG_DFL);
1497                 signal(SIGINT, SIG_DFL);
1498                 signal(SIGQUIT, SIG_DFL);
1499                 signal(SIGTERM, SIG_DFL);
1500                 signal(SIGWINCH, SIG_DFL);
1501                 handlers_sets &= ~SET_TERM_HANDLERS;
1502         }
1503 }
1504
1505 #endif  /* BB_FEATURE_COMMAND_EDITING */
1506
1507
1508 #ifdef TEST
1509
1510 const char *applet_name = "debug stuff usage";
1511 const char *memory_exhausted = "Memory exhausted";
1512
1513 #ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
1514 #include <locale.h>
1515 #endif
1516
1517 unsigned int shell_context;
1518
1519 int main(int argc, char **argv)
1520 {
1521         char buff[BUFSIZ];
1522         char *prompt =
1523 #if defined(BB_FEATURE_SH_FANCY_PROMPT)
1524                 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:\
1525 \\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] \
1526 \\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
1527 #else
1528                 "% ";
1529 #endif
1530
1531 #ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
1532         setlocale(LC_ALL, "");
1533 #endif
1534         shell_context = 1;
1535         do {
1536                 int l;
1537                 cmdedit_read_input(prompt, buff);
1538                 l = strlen(buff);
1539                 if(l > 0 && buff[l-1] == '\n')
1540                         buff[l-1] = 0;
1541                 printf("*** cmdedit_read_input() returned line =%s=\n", buff);
1542         } while (shell_context);
1543         printf("*** cmdedit_read_input() detect ^C\n");
1544         return 0;
1545 }
1546
1547 #endif  /* TEST */