shell/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 <dzo@simtreas.ru>
   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    <andersen@codepoet.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 CONFIG_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 CONFIG_FEATURE_COMMAND_EDITING
  59 #define CONFIG_FEATURE_COMMAND_TAB_COMPLETION
  60 #define CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
  61 #define CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
  62 #define CONFIG_FEATURE_CLEAN_UP
  63
  64 #define D(x)  x
  65
  66 #endif                                                  /* TEST */
  67
  68 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
  69 #include <dirent.h>
  70 #include <sys/stat.h>
  71 #endif
  72
  73 #ifdef CONFIG_FEATURE_COMMAND_EDITING
  74
  75 #ifndef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
  76 #undef  CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
  77 #endif
  78
  79 #if defined(CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION) || defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
  80 #define CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
  81 #endif
  82
  83 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
  84 #       ifndef TEST
  85 #               include "pwd_.h"
  86 #       else
  87 #               include <pwd.h>
  88 #       endif  /* TEST */
  89 #endif                                                  /* advanced FEATURES */
  90
  91
  92 /* Maximum length of the linked list for the command line history */
  93 #ifndef CONFIG_FEATURE_COMMAND_HISTORY
  94 #define MAX_HISTORY   15
  95 #else
  96 #define MAX_HISTORY   CONFIG_FEATURE_COMMAND_HISTORY
  97 #endif
  98
  99 #if MAX_HISTORY < 1
 100 #warning cmdedit: You set MAX_HISTORY < 1. The history algorithm switched off.
 101 #else
 102 static char *history[MAX_HISTORY+1]; /* history + current */
 103 /* saved history lines */
 104 static int n_history;
 105 /* current pointer to history line */
 106 static int cur_history;
 107 #endif
 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
 120 volatile int handlers_sets = 0; /* Set next bites: */
 121
 122 enum {
 123         SET_ATEXIT = 1,         /* when atexit() has been called
 124                                    and get euid,uid,gid to fast compare */
 125         SET_WCHG_HANDLERS = 2,  /* winchg signal handler */
 126         SET_RESET_TERM = 4,     /* if the terminal needs to be reset upon exit */
 127 };
 128
 129
 130 static int cmdedit_x;           /* real x terminal position */
 131 static int cmdedit_y;           /* pseudoreal y terminal position */
 132 static int cmdedit_prmt_len;    /* lenght prompt without colores string */
 133
 134 static int cursor;              /* required global for signal handler */
 135 static int len;                 /* --- "" - - "" - -"- --""-- --""--- */
 136 static char *command_ps;        /* --- "" - - "" - -"- --""-- --""--- */
 137 static
 138 #ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
 139         const
 140 #endif
 141 char *cmdedit_prompt;           /* --- "" - - "" - -"- --""-- --""--- */
 142
 143 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 144 static char *user_buf = "";
 145 static char *home_pwd_buf = "";
 146 static int my_euid;
 147 #endif
 148
 149 #ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
 150 static char *hostname_buf;
 151 static int num_ok_lines = 1;
 152 #endif
 153
 154
 155 #ifdef  CONFIG_FEATURE_COMMAND_TAB_COMPLETION
 156
 157 #ifndef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 158 static int my_euid;
 159 #endif
 160
 161 static int my_uid;
 162 static int my_gid;
 163
 164 #endif  /* CONFIG_FEATURE_COMMAND_TAB_COMPLETION */
 165
 166 /* It seems that libc5 doesn't know what a sighandler_t is... */
 167 #if (__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1)
 168 typedef void (*sighandler_t) (int);
 169 #endif
 170
 171 static void cmdedit_setwidth(int w, int redraw_flg);
 172
 173 static void win_changed(int nsig)
 174 {
 175         struct winsize win = { 0, 0, 0, 0 };
 176         static sighandler_t previous_SIGWINCH_handler;  /* for reset */
 177
 178         /*   emulate      || signal call */
 179         if (nsig == -SIGWINCH || nsig == SIGWINCH) {
 180                 ioctl(0, TIOCGWINSZ, &win);
 181                 if (win.ws_col > 0) {
 182                         cmdedit_setwidth(win.ws_col, nsig == SIGWINCH);
 183                 }
 184         }
 185         /* Unix not all standart in recall signal */
 186
 187         if (nsig == -SIGWINCH)          /* save previous handler   */
 188                 previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
 189         else if (nsig == SIGWINCH)      /* signaled called handler */
 190                 signal(SIGWINCH, win_changed);  /* set for next call       */
 191         else                                            /* nsig == 0 */
 192                 /* set previous handler    */
 193                 signal(SIGWINCH, previous_SIGWINCH_handler);    /* reset    */
 194 }
 195
 196 static void cmdedit_reset_term(void)
 197 {
 198         if ((handlers_sets & SET_RESET_TERM) != 0) {
 199 /* sparc and other have broken termios support: use old termio handling. */
 200                 setTermSettings(fileno(stdin), (void *) &initial_settings);
 201                 handlers_sets &= ~SET_RESET_TERM;
 202         }
 203         if ((handlers_sets & SET_WCHG_HANDLERS) != 0) {
 204                 /* reset SIGWINCH handler to previous (default) */
 205                 win_changed(0);
 206                 handlers_sets &= ~SET_WCHG_HANDLERS;
 207         }
 208         fflush(stdout);
 209 }
 210
 211
 212 /* special for recount position for scroll and remove terminal margin effect */
 213 static void cmdedit_set_out_char(int next_char)
 214 {
 215
 216         int c = (int)((unsigned char) command_ps[cursor]);
 217
 218         if (c == 0)
 219                 c = ' ';        /* destroy end char? */
 220 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 221         if (!Isprint(c)) {      /* Inverse put non-printable characters */
 222                 if (c >= 128)
 223                         c -= 128;
 224                 if (c < ' ')
 225                         c += '@';
 226                 if (c == 127)
 227                         c = '?';
 228                 printf("\033[7m%c\033[0m", c);
 229         } else
 230 #endif
 231                 putchar(c);
 232         if (++cmdedit_x >= cmdedit_termw) {
 233                 /* terminal is scrolled down */
 234                 cmdedit_y++;
 235                 cmdedit_x = 0;
 236
 237                 if (!next_char)
 238                         next_char = ' ';
 239                 /* destroy "(auto)margin" */
 240                 putchar(next_char);
 241                 putchar('\b');
 242         }
 243         cursor++;
 244 }
 245
 246 /* Move to end line. Bonus: rewrite line from cursor */
 247 static void input_end(void)
 248 {
 249         while (cursor < len)
 250                 cmdedit_set_out_char(0);
 251 }
 252
 253 /* Go to the next line */
 254 static void goto_new_line(void)
 255 {
 256         input_end();
 257         if (cmdedit_x)
 258                 putchar('\n');
 259 }
 260
 261
 262 static inline void out1str(const char *s)
 263 {
 264         if ( s )
 265                 fputs(s, stdout);
 266 }
 267 static inline void beep(void)
 268 {
 269         putchar('\007');
 270 }
 271
 272 /* Move back one charactor */
 273 /* special for slow terminal */
 274 static void input_backward(int num)
 275 {
 276         if (num > cursor)
 277                 num = cursor;
 278         cursor -= num;          /* new cursor (in command, not terminal) */
 279
 280         if (cmdedit_x >= num) {         /* no to up line */
 281                 cmdedit_x -= num;
 282                 if (num < 4)
 283                         while (num-- > 0)
 284                                 putchar('\b');
 285
 286                 else
 287                         printf("\033[%dD", num);
 288         } else {
 289                 int count_y;
 290
 291                 if (cmdedit_x) {
 292                         putchar('\r');          /* back to first terminal pos.  */
 293                         num -= cmdedit_x;       /* set previous backward        */
 294                 }
 295                 count_y = 1 + num / cmdedit_termw;
 296                 printf("\033[%dA", count_y);
 297                 cmdedit_y -= count_y;
 298                 /*  require  forward  after  uping   */
 299                 cmdedit_x = cmdedit_termw * count_y - num;
 300                 printf("\033[%dC", cmdedit_x);  /* set term cursor   */
 301         }
 302 }
 303
 304 static void put_prompt(void)
 305 {
 306         out1str(cmdedit_prompt);
 307         cmdedit_x = cmdedit_prmt_len;   /* count real x terminal position */
 308         cursor = 0;
 309         cmdedit_y = 0;                  /* new quasireal y */
 310 }
 311
 312 #ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
 313 static void parse_prompt(const char *prmt_ptr)
 314 {
 315         cmdedit_prompt = prmt_ptr;
 316         cmdedit_prmt_len = strlen(prmt_ptr);
 317         put_prompt();
 318 }
 319 #else
 320 static void parse_prompt(const char *prmt_ptr)
 321 {
 322         int prmt_len = 0;
 323         int sub_len = 0;
 324         char  flg_not_length = '[';
 325         char *prmt_mem_ptr = xcalloc(1, 1);
 326         char *pwd_buf = xgetcwd(0);
 327         char  buf2[PATH_MAX + 1];
 328         char  buf[2];
 329         char  c;
 330         char *pbuf;
 331
 332         if (!pwd_buf) {
 333                 pwd_buf=(char *)bb_msg_unknown;
 334         }
 335
 336         while (*prmt_ptr) {
 337                 pbuf    = buf;
 338                 pbuf[1] = 0;
 339                 c = *prmt_ptr++;
 340                 if (c == '\\') {
 341                         const char *cp = prmt_ptr;
 342                         int l;
 343
 344                         c = bb_process_escape_sequence(&prmt_ptr);
 345                         if(prmt_ptr==cp) {
 346                           if (*cp == 0)
 347                                 break;
 348                           c = *prmt_ptr++;
 349                           switch (c) {
 350 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 351                           case 'u':
 352                                 pbuf = user_buf;
 353                                 break;
 354 #endif
 355                           case 'h':
 356                                 pbuf = hostname_buf;
 357                                 if (pbuf == 0) {
 358                                         pbuf = xcalloc(256, 1);
 359                                         if (gethostname(pbuf, 255) < 0) {
 360                                                 strcpy(pbuf, "?");
 361                                         } else {
 362                                                 char *s = strchr(pbuf, '.');
 363
 364                                                 if (s)
 365                                                         *s = 0;
 366                                         }
 367                                         hostname_buf = pbuf;
 368                                 }
 369                                 break;
 370                           case '$':
 371                                 c = my_euid == 0 ? '#' : '$';
 372                                 break;
 373 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 374                           case 'w':
 375                                 pbuf = pwd_buf;
 376                                 l = strlen(home_pwd_buf);
 377                                 if (home_pwd_buf[0] != 0 &&
 378                                     strncmp(home_pwd_buf, pbuf, l) == 0 &&
 379                                     (pbuf[l]=='/' || pbuf[l]=='\0') &&
 380                                     strlen(pwd_buf+l)<PATH_MAX) {
 381                                         pbuf = buf2;
 382                                         *pbuf = '~';
 383                                         strcpy(pbuf+1, pwd_buf+l);
 384                                         }
 385                                 break;
 386 #endif
 387                           case 'W':
 388                                 pbuf = pwd_buf;
 389                                 cp = strrchr(pbuf,'/');
 390                                 if ( (cp != NULL) && (cp != pbuf) )
 391                                         pbuf += (cp-pbuf)+1;
 392                                 break;
 393                           case '!':
 394                                 snprintf(pbuf = buf2, sizeof(buf2), "%d", num_ok_lines);
 395                                 break;
 396                           case 'e': case 'E':     /* \e \E = \033 */
 397                                 c = '\033';
 398                                 break;
 399                           case 'x': case 'X':
 400                                 for (l = 0; l < 3;) {
 401                                         int h;
 402                                         buf2[l++] = *prmt_ptr;
 403                                         buf2[l] = 0;
 404                                         h = strtol(buf2, &pbuf, 16);
 405                                         if (h > UCHAR_MAX || (pbuf - buf2) < l) {
 406                                                 l--;
 407                                                 break;
 408                                         }
 409                                         prmt_ptr++;
 410                                 }
 411                                 buf2[l] = 0;
 412                                 c = (char)strtol(buf2, 0, 16);
 413                                 if(c==0)
 414                                         c = '?';
 415                                 pbuf = buf;
 416                                 break;
 417                           case '[': case ']':
 418                                 if (c == flg_not_length) {
 419                                         flg_not_length = flg_not_length == '[' ? ']' : '[';
 420                                         continue;
 421                                 }
 422                                 break;
 423                           }
 424                         }
 425                 }
 426                 if(pbuf == buf)
 427                         *pbuf = c;
 428                 prmt_len += strlen(pbuf);
 429                 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
 430                 if (flg_not_length == ']')
 431                         sub_len++;
 432         }
 433         if(pwd_buf!=(char *)bb_msg_unknown)
 434                 free(pwd_buf);
 435         cmdedit_prompt = prmt_mem_ptr;
 436         cmdedit_prmt_len = prmt_len - sub_len;
 437         put_prompt();
 438 }
 439 #endif
 440
 441
 442 /* draw promt, editor line, and clear tail */
 443 static void redraw(int y, int back_cursor)
 444 {
 445         if (y > 0)                              /* up to start y */
 446                 printf("\033[%dA", y);
 447         putchar('\r');
 448         put_prompt();
 449         input_end();                            /* rewrite */
 450         printf("\033[J");                       /* destroy tail after cursor */
 451         input_backward(back_cursor);
 452 }
 453
 454 /* Delete the char in front of the cursor */
 455 static void input_delete(void)
 456 {
 457         int j = cursor;
 458
 459         if (j == len)
 460                 return;
 461
 462         strcpy(command_ps + j, command_ps + j + 1);
 463         len--;
 464         input_end();                    /* rewtite new line */
 465         cmdedit_set_out_char(0);        /* destroy end char */
 466         input_backward(cursor - j);     /* back to old pos cursor */
 467 }
 468
 469 /* Delete the char in back of the cursor */
 470 static void input_backspace(void)
 471 {
 472         if (cursor > 0) {
 473                 input_backward(1);
 474                 input_delete();
 475         }
 476 }
 477
 478
 479 /* Move forward one charactor */
 480 static void input_forward(void)
 481 {
 482         if (cursor < len)
 483                 cmdedit_set_out_char(command_ps[cursor + 1]);
 484 }
 485
 486
 487 static void cmdedit_setwidth(int w, int redraw_flg)
 488 {
 489         cmdedit_termw = cmdedit_prmt_len + 2;
 490         if (w <= cmdedit_termw) {
 491                 cmdedit_termw = cmdedit_termw % w;
 492         }
 493         if (w > cmdedit_termw) {
 494                 cmdedit_termw = w;
 495
 496                 if (redraw_flg) {
 497                         /* new y for current cursor */
 498                         int new_y = (cursor + cmdedit_prmt_len) / w;
 499
 500                         /* redraw */
 501                         redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), len - cursor);
 502                         fflush(stdout);
 503                 }
 504         }
 505 }
 506
 507 static void cmdedit_init(void)
 508 {
 509         cmdedit_prmt_len = 0;
 510         if ((handlers_sets & SET_WCHG_HANDLERS) == 0) {
 511                 /* emulate usage handler to set handler and call yours work */
 512                 win_changed(-SIGWINCH);
 513                 handlers_sets |= SET_WCHG_HANDLERS;
 514         }
 515
 516         if ((handlers_sets & SET_ATEXIT) == 0) {
 517 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 518                 struct passwd *entry;
 519
 520                 my_euid = geteuid();
 521                 entry = getpwuid(my_euid);
 522                 if (entry) {
 523                         user_buf = bb_xstrdup(entry->pw_name);
 524                         home_pwd_buf = bb_xstrdup(entry->pw_dir);
 525                 }
 526 #endif
 527
 528 #ifdef  CONFIG_FEATURE_COMMAND_TAB_COMPLETION
 529
 530 #ifndef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 531                 my_euid = geteuid();
 532 #endif
 533                 my_uid = getuid();
 534                 my_gid = getgid();
 535 #endif  /* CONFIG_FEATURE_COMMAND_TAB_COMPLETION */
 536                 handlers_sets |= SET_ATEXIT;
 537                 atexit(cmdedit_reset_term);     /* be sure to do this only once */
 538         }
 539 }
 540
 541 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
 542
 543 static int is_execute(const struct stat *st)
 544 {
 545         if ((!my_euid && (st->st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) ||
 546                 (my_uid == st->st_uid && (st->st_mode & S_IXUSR)) ||
 547                 (my_gid == st->st_gid && (st->st_mode & S_IXGRP)) ||
 548                 (st->st_mode & S_IXOTH)) return TRUE;
 549         return FALSE;
 550 }
 551
 552 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
 553
 554 static char **username_tab_completion(char *ud, int *num_matches)
 555 {
 556         struct passwd *entry;
 557         int userlen;
 558         char *temp;
 559
 560
 561         ud++;                           /* ~user/... to user/... */
 562         userlen = strlen(ud);
 563
 564         if (num_matches == 0) {         /* "~/..." or "~user/..." */
 565                 char *sav_ud = ud - 1;
 566                 char *home = 0;
 567
 568                 if (*ud == '/') {       /* "~/..."     */
 569                         home = home_pwd_buf;
 570                 } else {
 571                         /* "~user/..." */
 572                         temp = strchr(ud, '/');
 573                         *temp = 0;              /* ~user\0 */
 574                         entry = getpwnam(ud);
 575                         *temp = '/';            /* restore ~user/... */
 576                         ud = temp;
 577                         if (entry)
 578                                 home = entry->pw_dir;
 579                 }
 580                 if (home) {
 581                         if ((userlen + strlen(home) + 1) < BUFSIZ) {
 582                                 char temp2[BUFSIZ];     /* argument size */
 583
 584                                 /* /home/user/... */
 585                                 sprintf(temp2, "%s%s", home, ud);
 586                                 strcpy(sav_ud, temp2);
 587                         }
 588                 }
 589                 return 0;       /* void, result save to argument :-) */
 590         } else {
 591                 /* "~[^/]*" */
 592                 char **matches = (char **) NULL;
 593                 int nm = 0;
 594
 595                 setpwent();
 596
 597                 while ((entry = getpwent()) != NULL) {
 598                         /* Null usernames should result in all users as possible completions. */
 599                         if ( /*!userlen || */ !strncmp(ud, entry->pw_name, userlen)) {
 600
 601                                bb_xasprintf(&temp, "~%s/", entry->pw_name);
 602                                 matches = xrealloc(matches, (nm + 1) * sizeof(char *));
 603
 604                                 matches[nm++] = temp;
 605                         }
 606                 }
 607
 608                 endpwent();
 609                 (*num_matches) = nm;
 610                 return (matches);
 611         }
 612 }
 613 #endif  /* CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION */
 614
 615 enum {
 616         FIND_EXE_ONLY = 0,
 617         FIND_DIR_ONLY = 1,
 618         FIND_FILE_ONLY = 2,
 619 };
 620
 621 static int path_parse(char ***p, int flags)
 622 {
 623         int npth;
 624         char *tmp;
 625         char *pth;
 626
 627         /* if not setenv PATH variable, to search cur dir "." */
 628         if (flags != FIND_EXE_ONLY || (pth = getenv("PATH")) == 0 ||
 629                 /* PATH=<empty> or PATH=:<empty> */
 630                 *pth == 0 || (*pth == ':' && *(pth + 1) == 0)) {
 631                 return 1;
 632         }
 633
 634         tmp = pth;
 635         npth = 0;
 636
 637         for (;;) {
 638                 npth++;                 /* count words is + 1 count ':' */
 639                 tmp = strchr(tmp, ':');
 640                 if (tmp) {
 641                         if (*++tmp == 0)
 642                                 break;  /* :<empty> */
 643                 } else
 644                         break;
 645         }
 646
 647         *p = xmalloc(npth * sizeof(char *));
 648
 649         tmp = pth;
 650         (*p)[0] = bb_xstrdup(tmp);
 651         npth = 1;                       /* count words is + 1 count ':' */
 652
 653         for (;;) {
 654                 tmp = strchr(tmp, ':');
 655                 if (tmp) {
 656                         (*p)[0][(tmp - pth)] = 0;       /* ':' -> '\0' */
 657                         if (*++tmp == 0)
 658                                 break;                  /* :<empty> */
 659                 } else
 660                         break;
 661                 (*p)[npth++] = &(*p)[0][(tmp - pth)];   /* p[next]=p[0][&'\0'+1] */
 662         }
 663
 664         return npth;
 665 }
 666
 667 static char *add_quote_for_spec_chars(char *found)
 668 {
 669         int l = 0;
 670         char *s = xmalloc((strlen(found) + 1) * 2);
 671
 672         while (*found) {
 673                 if (strchr(" `\"#$%^&*()=+{}[]:;\'|\\<>", *found))
 674                         s[l++] = '\\';
 675                 s[l++] = *found++;
 676         }
 677         s[l] = 0;
 678         return s;
 679 }
 680
 681 static char **exe_n_cwd_tab_completion(char *command, int *num_matches,
 682                                         int type)
 683 {
 684
 685         char **matches = 0;
 686         DIR *dir;
 687         struct dirent *next;
 688         char dirbuf[BUFSIZ];
 689         int nm = *num_matches;
 690         struct stat st;
 691         char *path1[1];
 692         char **paths = path1;
 693         int npaths;
 694         int i;
 695         char *found;
 696         char *pfind = strrchr(command, '/');
 697
 698         path1[0] = ".";
 699
 700         if (pfind == NULL) {
 701                 /* no dir, if flags==EXE_ONLY - get paths, else "." */
 702                 npaths = path_parse(&paths, type);
 703                 pfind = command;
 704         } else {
 705                 /* with dir */
 706                 /* save for change */
 707                 strcpy(dirbuf, command);
 708                 /* set dir only */
 709                 dirbuf[(pfind - command) + 1] = 0;
 710 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
 711                 if (dirbuf[0] == '~')   /* ~/... or ~user/... */
 712                         username_tab_completion(dirbuf, 0);
 713 #endif
 714                 /* "strip" dirname in command */
 715                 pfind++;
 716
 717                 paths[0] = dirbuf;
 718                 npaths = 1;                             /* only 1 dir */
 719         }
 720
 721         for (i = 0; i < npaths; i++) {
 722
 723                 dir = opendir(paths[i]);
 724                 if (!dir)                       /* Don't print an error */
 725                         continue;
 726
 727                 while ((next = readdir(dir)) != NULL) {
 728                         char *str_found = next->d_name;
 729
 730                         /* matched ? */
 731                         if (strncmp(str_found, pfind, strlen(pfind)))
 732                                 continue;
 733                         /* not see .name without .match */
 734                         if (*str_found == '.' && *pfind == 0) {
 735                                 if (*paths[i] == '/' && paths[i][1] == 0
 736                                         && str_found[1] == 0) str_found = "";   /* only "/" */
 737                                 else
 738                                         continue;
 739                         }
 740                         found = concat_path_file(paths[i], str_found);
 741                         /* hmm, remover in progress? */
 742                         if (stat(found, &st) < 0)
 743                                 goto cont;
 744                         /* find with dirs ? */
 745                         if (paths[i] != dirbuf)
 746                                 strcpy(found, next->d_name);    /* only name */
 747                         if (S_ISDIR(st.st_mode)) {
 748                                 /* name is directory      */
 749                                 str_found = found;
 750                                 found = concat_path_file(found, "");
 751                                 free(str_found);
 752                                 str_found = add_quote_for_spec_chars(found);
 753                         } else {
 754                                 /* not put found file if search only dirs for cd */
 755                                 if (type == FIND_DIR_ONLY)
 756                                         goto cont;
 757                                 str_found = add_quote_for_spec_chars(found);
 758                                 if (type == FIND_FILE_ONLY ||
 759                                         (type == FIND_EXE_ONLY && is_execute(&st)))
 760                                         strcat(str_found, " ");
 761                         }
 762                         /* Add it to the list */
 763                         matches = xrealloc(matches, (nm + 1) * sizeof(char *));
 764
 765                         matches[nm++] = str_found;
 766 cont:
 767                         free(found);
 768                 }
 769                 closedir(dir);
 770         }
 771         if (paths != path1) {
 772                 free(paths[0]);                 /* allocated memory only in first member */
 773                 free(paths);
 774         }
 775         *num_matches = nm;
 776         return (matches);
 777 }
 778
 779 static int match_compare(const void *a, const void *b)
 780 {
 781         return strcmp(*(char **) a, *(char **) b);
 782 }
 783
 784
 785
 786 #define QUOT    (UCHAR_MAX+1)
 787
 788 #define collapse_pos(is, in) { \
 789         memcpy(int_buf+(is), int_buf+(in), (BUFSIZ+1-(is)-(in))*sizeof(int)); \
 790         memcpy(pos_buf+(is), pos_buf+(in), (BUFSIZ+1-(is)-(in))*sizeof(int)); }
 791
 792 static int find_match(char *matchBuf, int *len_with_quotes)
 793 {
 794         int i, j;
 795         int command_mode;
 796         int c, c2;
 797         int int_buf[BUFSIZ + 1];
 798         int pos_buf[BUFSIZ + 1];
 799
 800         /* set to integer dimension characters and own positions */
 801         for (i = 0;; i++) {
 802                 int_buf[i] = (int) ((unsigned char) matchBuf[i]);
 803                 if (int_buf[i] == 0) {
 804                         pos_buf[i] = -1;        /* indicator end line */
 805                         break;
 806                 } else
 807                         pos_buf[i] = i;
 808         }
 809
 810         /* mask \+symbol and convert '\t' to ' ' */
 811         for (i = j = 0; matchBuf[i]; i++, j++)
 812                 if (matchBuf[i] == '\\') {
 813                         collapse_pos(j, j + 1);
 814                         int_buf[j] |= QUOT;
 815                         i++;
 816 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 817                         if (matchBuf[i] == '\t')        /* algorithm equivalent */
 818                                 int_buf[j] = ' ' | QUOT;
 819 #endif
 820                 }
 821 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 822                 else if (matchBuf[i] == '\t')
 823                         int_buf[j] = ' ';
 824 #endif
 825
 826         /* mask "symbols" or 'symbols' */
 827         c2 = 0;
 828         for (i = 0; int_buf[i]; i++) {
 829                 c = int_buf[i];
 830                 if (c == '\'' || c == '"') {
 831                         if (c2 == 0)
 832                                 c2 = c;
 833                         else {
 834                                 if (c == c2)
 835                                         c2 = 0;
 836                                 else
 837                                         int_buf[i] |= QUOT;
 838                         }
 839                 } else if (c2 != 0 && c != '$')
 840                         int_buf[i] |= QUOT;
 841         }
 842
 843         /* skip commands with arguments if line have commands delimiters */
 844         /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */
 845         for (i = 0; int_buf[i]; i++) {
 846                 c = int_buf[i];
 847                 c2 = int_buf[i + 1];
 848                 j = i ? int_buf[i - 1] : -1;
 849                 command_mode = 0;
 850                 if (c == ';' || c == '&' || c == '|') {
 851                         command_mode = 1 + (c == c2);
 852                         if (c == '&') {
 853                                 if (j == '>' || j == '<')
 854                                         command_mode = 0;
 855                         } else if (c == '|' && j == '>')
 856                                 command_mode = 0;
 857                 }
 858                 if (command_mode) {
 859                         collapse_pos(0, i + command_mode);
 860                         i = -1;                         /* hack incremet */
 861                 }
 862         }
 863         /* collapse `command...` */
 864         for (i = 0; int_buf[i]; i++)
 865                 if (int_buf[i] == '`') {
 866                         for (j = i + 1; int_buf[j]; j++)
 867                                 if (int_buf[j] == '`') {
 868                                         collapse_pos(i, j + 1);
 869                                         j = 0;
 870                                         break;
 871                                 }
 872                         if (j) {
 873                                 /* not found close ` - command mode, collapse all previous */
 874                                 collapse_pos(0, i + 1);
 875                                 break;
 876                         } else
 877                                 i--;                    /* hack incremet */
 878                 }
 879
 880         /* collapse (command...(command...)...) or {command...{command...}...} */
 881         c = 0;                                          /* "recursive" level */
 882         c2 = 0;
 883         for (i = 0; int_buf[i]; i++)
 884                 if (int_buf[i] == '(' || int_buf[i] == '{') {
 885                         if (int_buf[i] == '(')
 886                                 c++;
 887                         else
 888                                 c2++;
 889                         collapse_pos(0, i + 1);
 890                         i = -1;                         /* hack incremet */
 891                 }
 892         for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++)
 893                 if ((int_buf[i] == ')' && c > 0) || (int_buf[i] == '}' && c2 > 0)) {
 894                         if (int_buf[i] == ')')
 895                                 c--;
 896                         else
 897                                 c2--;
 898                         collapse_pos(0, i + 1);
 899                         i = -1;                         /* hack incremet */
 900                 }
 901
 902         /* skip first not quote space */
 903         for (i = 0; int_buf[i]; i++)
 904                 if (int_buf[i] != ' ')
 905                         break;
 906         if (i)
 907                 collapse_pos(0, i);
 908
 909         /* set find mode for completion */
 910         command_mode = FIND_EXE_ONLY;
 911         for (i = 0; int_buf[i]; i++)
 912                 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
 913                         if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
 914                                 && matchBuf[pos_buf[0]]=='c'
 915                                 && matchBuf[pos_buf[1]]=='d' )
 916                                 command_mode = FIND_DIR_ONLY;
 917                         else {
 918                                 command_mode = FIND_FILE_ONLY;
 919                                 break;
 920                         }
 921                 }
 922         /* "strlen" */
 923         for (i = 0; int_buf[i]; i++);
 924         /* find last word */
 925         for (--i; i >= 0; i--) {
 926                 c = int_buf[i];
 927                 if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
 928                         collapse_pos(0, i + 1);
 929                         break;
 930                 }
 931         }
 932         /* skip first not quoted '\'' or '"' */
 933         for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++);
 934         /* collapse quote or unquote // or /~ */
 935         while ((int_buf[i] & ~QUOT) == '/' &&
 936                         ((int_buf[i + 1] & ~QUOT) == '/'
 937                          || (int_buf[i + 1] & ~QUOT) == '~')) {
 938                 i++;
 939         }
 940
 941         /* set only match and destroy quotes */
 942         j = 0;
 943         for (c = 0; pos_buf[i] >= 0; i++) {
 944                 matchBuf[c++] = matchBuf[pos_buf[i]];
 945                 j = pos_buf[i] + 1;
 946         }
 947         matchBuf[c] = 0;
 948         /* old lenght matchBuf with quotes symbols */
 949         *len_with_quotes = j ? j - pos_buf[0] : 0;
 950
 951         return command_mode;
 952 }
 953
 954 /*
 955    display by column original ideas from ls applet,
 956    very optimize by my :)
 957 */
 958 static void showfiles(char **matches, int nfiles)
 959 {
 960         int ncols, row;
 961         int column_width = 0;
 962         int nrows = nfiles;
 963
 964         /* find the longest file name-  use that as the column width */
 965         for (row = 0; row < nrows; row++) {
 966                 int l = strlen(matches[row]);
 967
 968                 if (column_width < l)
 969                         column_width = l;
 970         }
 971         column_width += 2;              /* min space for columns */
 972         ncols = cmdedit_termw / column_width;
 973
 974         if (ncols > 1) {
 975                 nrows /= ncols;
 976                 if(nfiles % ncols)
 977                         nrows++;        /* round up fractionals */
 978                 column_width = -column_width;   /* for printf("%-Ns", ...); */
 979         } else {
 980                 ncols = 1;
 981         }
 982         for (row = 0; row < nrows; row++) {
 983                 int n = row;
 984                 int nc;
 985
 986                 for(nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++)
 987                         printf("%*s", column_width, matches[n]);
 988                 printf("%s\n", matches[n]);
 989         }
 990 }
 991
 992
 993 static void input_tab(int *lastWasTab)
 994 {
 995         /* Do TAB completion */
 996         static int num_matches;
 997         static char **matches;
 998
 999         if (lastWasTab == 0) {          /* free all memory */
1000                 if (matches) {
1001                         while (num_matches > 0)
1002                                 free(matches[--num_matches]);
1003                         free(matches);
1004                         matches = (char **) NULL;
1005                 }
1006                 return;
1007         }
1008         if (! *lastWasTab) {
1009
1010                 char *tmp;
1011                 int len_found;
1012                 char matchBuf[BUFSIZ];
1013                 int find_type;
1014                 int recalc_pos;
1015
1016                 *lastWasTab = TRUE;             /* flop trigger */
1017
1018                 /* Make a local copy of the string -- up
1019                  * to the position of the cursor */
1020                 tmp = strncpy(matchBuf, command_ps, cursor);
1021                 tmp[cursor] = 0;
1022
1023                 find_type = find_match(matchBuf, &recalc_pos);
1024
1025                 /* Free up any memory already allocated */
1026                 input_tab(0);
1027
1028 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
1029                 /* If the word starts with `~' and there is no slash in the word,
1030                  * then try completing this word as a username. */
1031
1032                 if (matchBuf[0] == '~' && strchr(matchBuf, '/') == 0)
1033                         matches = username_tab_completion(matchBuf, &num_matches);
1034 #endif
1035                 /* Try to match any executable in our path and everything
1036                  * in the current working directory that matches.  */
1037                 if (!matches)
1038                         matches =
1039                                 exe_n_cwd_tab_completion(matchBuf,
1040                                         &num_matches, find_type);
1041                 /* Remove duplicate found */
1042                 if(matches) {
1043                         int i, j;
1044                         /* bubble */
1045                         for(i=0; i<(num_matches-1); i++)
1046                                 for(j=i+1; j<num_matches; j++)
1047                                         if(matches[i]!=0 && matches[j]!=0 &&
1048                                                 strcmp(matches[i], matches[j])==0) {
1049                                                         free(matches[j]);
1050                                                         matches[j]=0;
1051                                         }
1052                         j=num_matches;
1053                         num_matches = 0;
1054                         for(i=0; i<j; i++)
1055                                 if(matches[i]) {
1056                                         if(!strcmp(matches[i], "./"))
1057                                                 matches[i][1]=0;
1058                                         else if(!strcmp(matches[i], "../"))
1059                                                 matches[i][2]=0;
1060                                         matches[num_matches++]=matches[i];
1061                                 }
1062                 }
1063                 /* Did we find exactly one match? */
1064                 if (!matches || num_matches > 1) {
1065                         char *tmp1;
1066
1067                         beep();
1068                         if (!matches)
1069                                 return;         /* not found */
1070                         /* sort */
1071                         qsort(matches, num_matches, sizeof(char *), match_compare);
1072
1073                         /* find minimal match */
1074                         tmp = bb_xstrdup(matches[0]);
1075                         for (tmp1 = tmp; *tmp1; tmp1++)
1076                                 for (len_found = 1; len_found < num_matches; len_found++)
1077                                         if (matches[len_found][(tmp1 - tmp)] != *tmp1) {
1078                                                 *tmp1 = 0;
1079                                                 break;
1080                                         }
1081                         if (*tmp == 0) {        /* have unique */
1082                                 free(tmp);
1083                                 return;
1084                         }
1085                 } else {                        /* one match */
1086                         tmp = matches[0];
1087                         /* for next completion current found */
1088                         *lastWasTab = FALSE;
1089                 }
1090
1091                 len_found = strlen(tmp);
1092                 /* have space to placed match? */
1093                 if ((len_found - strlen(matchBuf) + len) < BUFSIZ) {
1094
1095                         /* before word for match   */
1096                         command_ps[cursor - recalc_pos] = 0;
1097                         /* save   tail line        */
1098                         strcpy(matchBuf, command_ps + cursor);
1099                         /* add    match            */
1100                         strcat(command_ps, tmp);
1101                         /* add    tail             */
1102                         strcat(command_ps, matchBuf);
1103                         /* back to begin word for match    */
1104                         input_backward(recalc_pos);
1105                         /* new pos                         */
1106                         recalc_pos = cursor + len_found;
1107                         /* new len                         */
1108                         len = strlen(command_ps);
1109                         /* write out the matched command   */
1110                         redraw(cmdedit_y, len - recalc_pos);
1111                 }
1112                 if (tmp != matches[0])
1113                         free(tmp);
1114         } else {
1115                 /* Ok -- the last char was a TAB.  Since they
1116                  * just hit TAB again, print a list of all the
1117                  * available choices... */
1118                 if (matches && num_matches > 0) {
1119                         int sav_cursor = cursor;        /* change goto_new_line() */
1120
1121                         /* Go to the next line */
1122                         goto_new_line();
1123                         showfiles(matches, num_matches);
1124                         redraw(0, len - sav_cursor);
1125                 }
1126         }
1127 }
1128 #endif  /* CONFIG_FEATURE_COMMAND_TAB_COMPLETION */
1129
1130 #if MAX_HISTORY >= 1
1131 static void get_previous_history(void)
1132 {
1133         if(command_ps[0] != 0 || history[cur_history] == 0) {
1134                 free(history[cur_history]);
1135                 history[cur_history] = bb_xstrdup(command_ps);
1136         }
1137         cur_history--;
1138 }
1139
1140 static int get_next_history(void)
1141 {
1142         int ch = cur_history;
1143
1144         if (ch < n_history) {
1145                 get_previous_history(); /* save the current history line */
1146                 return (cur_history = ch+1);
1147         } else {
1148                 beep();
1149                 return 0;
1150         }
1151 }
1152
1153 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
1154 extern void load_history ( const char *fromfile )
1155 {
1156         FILE *fp;
1157         int hi;
1158
1159         /* cleanup old */
1160
1161         for(hi = n_history; hi > 0; ) {
1162                 hi--;
1163                 free ( history [hi] );
1164         }
1165
1166         if (( fp = fopen ( fromfile, "r" ))) {
1167
1168                 for ( hi = 0; hi < MAX_HISTORY; ) {
1169                         char * hl = bb_get_chomped_line_from_file(fp);
1170                         int l;
1171
1172                         if(!hl)
1173                                 break;
1174                         l = strlen(hl);
1175                         if(l >= BUFSIZ)
1176                                 hl[BUFSIZ-1] = 0;
1177                         if(l == 0 || hl[0] == ' ') {
1178                                 free(hl);
1179                                 continue;
1180                         }
1181                         history [hi++] = hl;
1182                 }
1183                 fclose ( fp );
1184         }
1185         cur_history = n_history = hi;
1186 }
1187
1188 extern void save_history ( const char *tofile )
1189 {
1190         FILE *fp = fopen ( tofile, "w" );
1191
1192         if ( fp ) {
1193                 int i;
1194
1195                 for ( i = 0; i < n_history; i++ ) {
1196                         fputs ( history [i], fp );
1197                         fputc ( '\n', fp );
1198                 }
1199                 fclose ( fp );
1200         }
1201 }
1202 #endif
1203
1204 #endif
1205
1206 enum {
1207         ESC = 27,
1208         DEL = 127,
1209 };
1210
1211
1212 /*
1213  * This function is used to grab a character buffer
1214  * from the input file descriptor and allows you to
1215  * a string with full command editing (sortof like
1216  * a mini readline).
1217  *
1218  * The following standard commands are not implemented:
1219  * ESC-b -- Move back one word
1220  * ESC-f -- Move forward one word
1221  * ESC-d -- Delete back one word
1222  * ESC-h -- Delete forward one word
1223  * CTL-t -- Transpose two characters
1224  *
1225  * Furthermore, the "vi" command editing keys are not implemented.
1226  *
1227  */
1228
1229
1230 int cmdedit_read_input(char *prompt, char command[BUFSIZ])
1231 {
1232
1233         int break_out = 0;
1234         int lastWasTab = FALSE;
1235         unsigned char c = 0;
1236
1237         /* prepare before init handlers */
1238         cmdedit_y = 0;  /* quasireal y, not true work if line > xt*yt */
1239         len = 0;
1240         command_ps = command;
1241
1242         getTermSettings(0, (void *) &initial_settings);
1243         memcpy(&new_settings, &initial_settings, sizeof(struct termios));
1244         new_settings.c_lflag &= ~ICANON;        /* unbuffered input */
1245         /* Turn off echoing and CTRL-C, so we can trap it */
1246         new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
1247 #ifndef linux
1248         /* Hmm, in linux c_cc[] not parsed if set ~ICANON */
1249         new_settings.c_cc[VMIN] = 1;
1250         new_settings.c_cc[VTIME] = 0;
1251         /* Turn off CTRL-C, so we can trap it */
1252 #       ifndef _POSIX_VDISABLE
1253 #               define _POSIX_VDISABLE '\0'
1254 #       endif
1255         new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
1256 #endif
1257         command[0] = 0;
1258
1259         setTermSettings(0, (void *) &new_settings);
1260         handlers_sets |= SET_RESET_TERM;
1261
1262         /* Now initialize things */
1263         cmdedit_init();
1264         /* Print out the command prompt */
1265         parse_prompt(prompt);
1266
1267         while (1) {
1268
1269                 fflush(stdout);                 /* buffered out to fast */
1270
1271                 if (safe_read(0, &c, 1) < 1)
1272                         /* if we can't read input then exit */
1273                         goto prepare_to_die;
1274
1275                 switch (c) {
1276                 case '\n':
1277                 case '\r':
1278                         /* Enter */
1279                         goto_new_line();
1280                         break_out = 1;
1281                         break;
1282                 case 1:
1283                         /* Control-a -- Beginning of line */
1284                         input_backward(cursor);
1285                         break;
1286                 case 2:
1287                         /* Control-b -- Move back one character */
1288                         input_backward(1);
1289                         break;
1290                 case 3:
1291                         /* Control-c -- stop gathering input */
1292                         goto_new_line();
1293                         command[0] = 0;
1294                         len = 0;
1295                         lastWasTab = FALSE;
1296                         put_prompt();
1297                         break;
1298                 case 4:
1299                         /* Control-d -- Delete one character, or exit
1300                          * if the len=0 and no chars to delete */
1301                         if (len == 0) {
1302 prepare_to_die:
1303 #if !defined(CONFIG_ASH)
1304                                 printf("exit");
1305                                 goto_new_line();
1306                                 /* cmdedit_reset_term() called in atexit */
1307                                 exit(EXIT_SUCCESS);
1308 #else
1309                                 break_out = -1; /* for control stoped jobs */
1310                                 break;
1311 #endif
1312                         } else {
1313                                 input_delete();
1314                         }
1315                         break;
1316                 case 5:
1317                         /* Control-e -- End of line */
1318                         input_end();
1319                         break;
1320                 case 6:
1321                         /* Control-f -- Move forward one character */
1322                         input_forward();
1323                         break;
1324                 case '\b':
1325                 case DEL:
1326                         /* Control-h and DEL */
1327                         input_backspace();
1328                         break;
1329                 case '\t':
1330 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
1331                         input_tab(&lastWasTab);
1332 #endif
1333                         break;
1334                 case 11:
1335                         /* Control-k -- clear to end of line */
1336                         *(command + cursor) = 0;
1337                         len = cursor;
1338                         printf("\033[J");
1339                         break;
1340                 case 12:
1341                                 /* Control-l -- clear screen */
1342                                 printf("\033[H");
1343                         redraw(0, len-cursor);
1344                         break;
1345 #if MAX_HISTORY >= 1
1346                 case 14:
1347                         /* Control-n -- Get next command in history */
1348                         if (get_next_history())
1349                                 goto rewrite_line;
1350                         break;
1351                 case 16:
1352                         /* Control-p -- Get previous command from history */
1353                         if (cur_history > 0) {
1354                                 get_previous_history();
1355                                 goto rewrite_line;
1356                         } else {
1357                                 beep();
1358                         }
1359                         break;
1360 #endif
1361                 case 21:
1362                         /* Control-U -- Clear line before cursor */
1363                         if (cursor) {
1364                                 strcpy(command, command + cursor);
1365                                 redraw(cmdedit_y, len -= cursor);
1366                         }
1367                         break;
1368                 case ESC:{
1369                         /* escape sequence follows */
1370                         if (safe_read(0, &c, 1) < 1)
1371                                 goto prepare_to_die;
1372                         /* different vt100 emulations */
1373                         if (c == '[' || c == 'O') {
1374                                 if (safe_read(0, &c, 1) < 1)
1375                                         goto prepare_to_die;
1376                         }
1377                         switch (c) {
1378 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
1379                         case '\t':                      /* Alt-Tab */
1380
1381                                 input_tab(&lastWasTab);
1382                                 break;
1383 #endif
1384 #if MAX_HISTORY >= 1
1385                         case 'A':
1386                                 /* Up Arrow -- Get previous command from history */
1387                                 if (cur_history > 0) {
1388                                         get_previous_history();
1389                                         goto rewrite_line;
1390                                 } else {
1391                                         beep();
1392                                 }
1393                                 break;
1394                         case 'B':
1395                                 /* Down Arrow -- Get next command in history */
1396                                 if (!get_next_history())
1397                                 break;
1398                                 /* Rewrite the line with the selected history item */
1399 rewrite_line:
1400                                 /* change command */
1401                                 len = strlen(strcpy(command, history[cur_history]));
1402                                 /* redraw and go to end line */
1403                                 redraw(cmdedit_y, 0);
1404                                 break;
1405 #endif
1406                         case 'C':
1407                                 /* Right Arrow -- Move forward one character */
1408                                 input_forward();
1409                                 break;
1410                         case 'D':
1411                                 /* Left Arrow -- Move back one character */
1412                                 input_backward(1);
1413                                 break;
1414                         case '3':
1415                                 /* Delete */
1416                                 input_delete();
1417                                 break;
1418                         case '1':
1419                         case 'H':
1420                                 /* Home (Ctrl-A) */
1421                                 input_backward(cursor);
1422                                 break;
1423                         case '4':
1424                         case 'F':
1425                                 /* End (Ctrl-E) */
1426                                 input_end();
1427                                 break;
1428                         default:
1429                                 if (!(c >= '1' && c <= '9'))
1430                                         c = 0;
1431                                 beep();
1432                         }
1433                         if (c >= '1' && c <= '9')
1434                                 do
1435                                         if (safe_read(0, &c, 1) < 1)
1436                                                 goto prepare_to_die;
1437                                 while (c != '~');
1438                         break;
1439                 }
1440
1441                 default:        /* If it's regular input, do the normal thing */
1442 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1443                         /* Control-V -- Add non-printable symbol */
1444                         if (c == 22) {
1445                                 if (safe_read(0, &c, 1) < 1)
1446                                         goto prepare_to_die;
1447                                 if (c == 0) {
1448                                         beep();
1449                                         break;
1450                                 }
1451                         } else
1452 #endif
1453                         if (!Isprint(c))        /* Skip non-printable characters */
1454                                 break;
1455
1456                         if (len >= (BUFSIZ - 2))        /* Need to leave space for enter */
1457                                 break;
1458
1459                         len++;
1460
1461                         if (cursor == (len - 1)) {      /* Append if at the end of the line */
1462                                 *(command + cursor) = c;
1463                                 *(command + cursor + 1) = 0;
1464                                 cmdedit_set_out_char(0);
1465                         } else {                        /* Insert otherwise */
1466                                 int sc = cursor;
1467
1468                                 memmove(command + sc + 1, command + sc, len - sc);
1469                                 *(command + sc) = c;
1470                                 sc++;
1471                                 /* rewrite from cursor */
1472                                 input_end();
1473                                 /* to prev x pos + 1 */
1474                                 input_backward(cursor - sc);
1475                         }
1476
1477                         break;
1478                 }
1479                 if (break_out)                  /* Enter is the command terminator, no more input. */
1480                         break;
1481
1482                 if (c != '\t')
1483                         lastWasTab = FALSE;
1484         }
1485
1486         setTermSettings(0, (void *) &initial_settings);
1487         handlers_sets &= ~SET_RESET_TERM;
1488
1489 #if MAX_HISTORY >= 1
1490         /* Handle command history log */
1491         /* cleanup may be saved current command line */
1492         free(history[MAX_HISTORY]);
1493         history[MAX_HISTORY] = 0;
1494         if (len) {                                      /* no put empty line */
1495                 int i = n_history;
1496                         /* After max history, remove the oldest command */
1497                 if (i >= MAX_HISTORY) {
1498                         free(history[0]);
1499                         for(i = 0; i < (MAX_HISTORY-1); i++)
1500                                 history[i] = history[i+1];
1501                 }
1502                 history[i++] = bb_xstrdup(command);
1503                 cur_history = i;
1504                 n_history = i;
1505 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1506                 num_ok_lines++;
1507 #endif
1508         }
1509 #else  /* MAX_HISTORY < 1 */
1510 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1511         if (len) {              /* no put empty line */
1512                 num_ok_lines++;
1513         }
1514 #endif
1515 #endif  /* MAX_HISTORY >= 1 */
1516         if(break_out>0) {
1517         command[len++] = '\n';          /* set '\n' */
1518         command[len] = 0;
1519         }
1520 #if defined(CONFIG_FEATURE_CLEAN_UP) && defined(CONFIG_FEATURE_COMMAND_TAB_COMPLETION)
1521         input_tab(0);                           /* strong free */
1522 #endif
1523 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1524         free(cmdedit_prompt);
1525 #endif
1526         cmdedit_reset_term();
1527         return len;
1528 }
1529
1530
1531
1532 #endif  /* CONFIG_FEATURE_COMMAND_EDITING */
1533
1534
1535 #ifdef TEST
1536
1537 const char *bb_applet_name = "debug stuff usage";
1538 const char *memory_exhausted = "Memory exhausted";
1539
1540 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1541 #include <locale.h>
1542 #endif
1543
1544 int main(int argc, char **argv)
1545 {
1546         char buff[BUFSIZ];
1547         char *prompt =
1548 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1549                 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:\
1550 \\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] \
1551 \\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
1552 #else
1553                 "% ";
1554 #endif
1555
1556 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1557         setlocale(LC_ALL, "");
1558 #endif
1559         while(1) {
1560                 int l;
1561                 cmdedit_read_input(prompt, buff);
1562                 l = strlen(buff);
1563                 if(l==0)
1564                         break;
1565                 if(l > 0 && buff[l-1] == '\n')
1566                         buff[l-1] = 0;
1567                 printf("*** cmdedit_read_input() returned line =%s=\n", buff);
1568         }
1569         printf("*** cmdedit_read_input() detect ^C\n");
1570         return 0;
1571 }
1572
1573 #endif  /* TEST */