shell/cmdedit.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Termios command line History and Editting.
   4  *
   5  * Copyright (c) 1986-2003 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 static void cmdedit_setwidth(int w, int redraw_flg);
 167
 168 static void win_changed(int nsig)
 169 {
 170         static sighandler_t previous_SIGWINCH_handler;  /* for reset */
 171
 172         /*   emulate      || signal call */
 173         if (nsig == -SIGWINCH || nsig == SIGWINCH) {
 174                 int width = 0;
 175                 get_terminal_width_height(0, &width, NULL);
 176                 cmdedit_setwidth(width, nsig == SIGWINCH);
 177         }
 178         /* Unix not all standart in recall signal */
 179
 180         if (nsig == -SIGWINCH)          /* save previous handler   */
 181                 previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
 182         else if (nsig == SIGWINCH)      /* signaled called handler */
 183                 signal(SIGWINCH, win_changed);  /* set for next call       */
 184         else                                            /* nsig == 0 */
 185                 /* set previous handler    */
 186                 signal(SIGWINCH, previous_SIGWINCH_handler);    /* reset    */
 187 }
 188
 189 static void cmdedit_reset_term(void)
 190 {
 191         if ((handlers_sets & SET_RESET_TERM) != 0) {
 192 /* sparc and other have broken termios support: use old termio handling. */
 193                 setTermSettings(fileno(stdin), (void *) &initial_settings);
 194                 handlers_sets &= ~SET_RESET_TERM;
 195         }
 196         if ((handlers_sets & SET_WCHG_HANDLERS) != 0) {
 197                 /* reset SIGWINCH handler to previous (default) */
 198                 win_changed(0);
 199                 handlers_sets &= ~SET_WCHG_HANDLERS;
 200         }
 201         fflush(stdout);
 202 }
 203
 204
 205 /* special for recount position for scroll and remove terminal margin effect */
 206 static void cmdedit_set_out_char(int next_char)
 207 {
 208
 209         int c = (int)((unsigned char) command_ps[cursor]);
 210
 211         if (c == 0)
 212                 c = ' ';        /* destroy end char? */
 213 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 214         if (!Isprint(c)) {      /* Inverse put non-printable characters */
 215                 if (c >= 128)
 216                         c -= 128;
 217                 if (c < ' ')
 218                         c += '@';
 219                 if (c == 127)
 220                         c = '?';
 221                 printf("\033[7m%c\033[0m", c);
 222         } else
 223 #endif
 224                 putchar(c);
 225         if (++cmdedit_x >= cmdedit_termw) {
 226                 /* terminal is scrolled down */
 227                 cmdedit_y++;
 228                 cmdedit_x = 0;
 229
 230                 if (!next_char)
 231                         next_char = ' ';
 232                 /* destroy "(auto)margin" */
 233                 putchar(next_char);
 234                 putchar('\b');
 235         }
 236         cursor++;
 237 }
 238
 239 /* Move to end line. Bonus: rewrite line from cursor */
 240 static void input_end(void)
 241 {
 242         while (cursor < len)
 243                 cmdedit_set_out_char(0);
 244 }
 245
 246 /* Go to the next line */
 247 static void goto_new_line(void)
 248 {
 249         input_end();
 250         if (cmdedit_x)
 251                 putchar('\n');
 252 }
 253
 254
 255 static inline void out1str(const char *s)
 256 {
 257         if ( s )
 258                 fputs(s, stdout);
 259 }
 260
 261 static inline void beep(void)
 262 {
 263         putchar('\007');
 264 }
 265
 266 /* Move back one charactor */
 267 /* special for slow terminal */
 268 static void input_backward(int num)
 269 {
 270         if (num > cursor)
 271                 num = cursor;
 272         cursor -= num;          /* new cursor (in command, not terminal) */
 273
 274         if (cmdedit_x >= num) {         /* no to up line */
 275                 cmdedit_x -= num;
 276                 if (num < 4)
 277                         while (num-- > 0)
 278                                 putchar('\b');
 279
 280                 else
 281                         printf("\033[%dD", num);
 282         } else {
 283                 int count_y;
 284
 285                 if (cmdedit_x) {
 286                         putchar('\r');          /* back to first terminal pos.  */
 287                         num -= cmdedit_x;       /* set previous backward        */
 288                 }
 289                 count_y = 1 + num / cmdedit_termw;
 290                 printf("\033[%dA", count_y);
 291                 cmdedit_y -= count_y;
 292                 /*  require  forward  after  uping   */
 293                 cmdedit_x = cmdedit_termw * count_y - num;
 294                 printf("\033[%dC", cmdedit_x);  /* set term cursor   */
 295         }
 296 }
 297
 298 static void put_prompt(void)
 299 {
 300         out1str(cmdedit_prompt);
 301         cmdedit_x = cmdedit_prmt_len;   /* count real x terminal position */
 302         cursor = 0;
 303         cmdedit_y = 0;                  /* new quasireal y */
 304 }
 305
 306 #ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
 307 static void parse_prompt(const char *prmt_ptr)
 308 {
 309         cmdedit_prompt = prmt_ptr;
 310         cmdedit_prmt_len = strlen(prmt_ptr);
 311         put_prompt();
 312 }
 313 #else
 314 static void parse_prompt(const char *prmt_ptr)
 315 {
 316         int prmt_len = 0;
 317         int sub_len = 0;
 318         char  flg_not_length = '[';
 319         char *prmt_mem_ptr = xcalloc(1, 1);
 320         char *pwd_buf = xgetcwd(0);
 321         char  buf2[PATH_MAX + 1];
 322         char  buf[2];
 323         char  c;
 324         char *pbuf;
 325
 326         if (!pwd_buf) {
 327                 pwd_buf=(char *)bb_msg_unknown;
 328         }
 329
 330         while (*prmt_ptr) {
 331                 pbuf    = buf;
 332                 pbuf[1] = 0;
 333                 c = *prmt_ptr++;
 334                 if (c == '\\') {
 335                         const char *cp = prmt_ptr;
 336                         int l;
 337
 338                         c = bb_process_escape_sequence(&prmt_ptr);
 339                         if(prmt_ptr==cp) {
 340                           if (*cp == 0)
 341                                 break;
 342                           c = *prmt_ptr++;
 343                           switch (c) {
 344 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 345                           case 'u':
 346                                 pbuf = user_buf;
 347                                 break;
 348 #endif
 349                           case 'h':
 350                                 pbuf = hostname_buf;
 351                                 if (pbuf == 0) {
 352                                         pbuf = xcalloc(256, 1);
 353                                         if (gethostname(pbuf, 255) < 0) {
 354                                                 strcpy(pbuf, "?");
 355                                         } else {
 356                                                 char *s = strchr(pbuf, '.');
 357
 358                                                 if (s)
 359                                                         *s = 0;
 360                                         }
 361                                         hostname_buf = pbuf;
 362                                 }
 363                                 break;
 364                           case '$':
 365                                 c = my_euid == 0 ? '#' : '$';
 366                                 break;
 367 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 368                           case 'w':
 369                                 pbuf = pwd_buf;
 370                                 l = strlen(home_pwd_buf);
 371                                 if (home_pwd_buf[0] != 0 &&
 372                                     strncmp(home_pwd_buf, pbuf, l) == 0 &&
 373                                     (pbuf[l]=='/' || pbuf[l]=='\0') &&
 374                                     strlen(pwd_buf+l)<PATH_MAX) {
 375                                         pbuf = buf2;
 376                                         *pbuf = '~';
 377                                         strcpy(pbuf+1, pwd_buf+l);
 378                                         }
 379                                 break;
 380 #endif
 381                           case 'W':
 382                                 pbuf = pwd_buf;
 383                                 cp = strrchr(pbuf,'/');
 384                                 if ( (cp != NULL) && (cp != pbuf) )
 385                                         pbuf += (cp-pbuf)+1;
 386                                 break;
 387                           case '!':
 388                                 snprintf(pbuf = buf2, sizeof(buf2), "%d", num_ok_lines);
 389                                 break;
 390                           case 'e': case 'E':     /* \e \E = \033 */
 391                                 c = '\033';
 392                                 break;
 393                           case 'x': case 'X':
 394                                 for (l = 0; l < 3;) {
 395                                         int h;
 396                                         buf2[l++] = *prmt_ptr;
 397                                         buf2[l] = 0;
 398                                         h = strtol(buf2, &pbuf, 16);
 399                                         if (h > UCHAR_MAX || (pbuf - buf2) < l) {
 400                                                 l--;
 401                                                 break;
 402                                         }
 403                                         prmt_ptr++;
 404                                 }
 405                                 buf2[l] = 0;
 406                                 c = (char)strtol(buf2, 0, 16);
 407                                 if(c==0)
 408                                         c = '?';
 409                                 pbuf = buf;
 410                                 break;
 411                           case '[': case ']':
 412                                 if (c == flg_not_length) {
 413                                         flg_not_length = flg_not_length == '[' ? ']' : '[';
 414                                         continue;
 415                                 }
 416                                 break;
 417                           }
 418                         }
 419                 }
 420                 if(pbuf == buf)
 421                         *pbuf = c;
 422                 prmt_len += strlen(pbuf);
 423                 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
 424                 if (flg_not_length == ']')
 425                         sub_len++;
 426         }
 427         if(pwd_buf!=(char *)bb_msg_unknown)
 428                 free(pwd_buf);
 429         cmdedit_prompt = prmt_mem_ptr;
 430         cmdedit_prmt_len = prmt_len - sub_len;
 431         put_prompt();
 432 }
 433 #endif
 434
 435
 436 /* draw promt, editor line, and clear tail */
 437 static void redraw(int y, int back_cursor)
 438 {
 439         if (y > 0)                              /* up to start y */
 440                 printf("\033[%dA", y);
 441         putchar('\r');
 442         put_prompt();
 443         input_end();                            /* rewrite */
 444         printf("\033[J");                       /* destroy tail after cursor */
 445         input_backward(back_cursor);
 446 }
 447
 448 /* Delete the char in front of the cursor */
 449 static void input_delete(void)
 450 {
 451         int j = cursor;
 452
 453         if (j == len)
 454                 return;
 455
 456         strcpy(command_ps + j, command_ps + j + 1);
 457         len--;
 458         input_end();                    /* rewtite new line */
 459         cmdedit_set_out_char(0);        /* destroy end char */
 460         input_backward(cursor - j);     /* back to old pos cursor */
 461 }
 462
 463 /* Delete the char in back of the cursor */
 464 static void input_backspace(void)
 465 {
 466         if (cursor > 0) {
 467                 input_backward(1);
 468                 input_delete();
 469         }
 470 }
 471
 472
 473 /* Move forward one charactor */
 474 static void input_forward(void)
 475 {
 476         if (cursor < len)
 477                 cmdedit_set_out_char(command_ps[cursor + 1]);
 478 }
 479
 480
 481 static void cmdedit_setwidth(int w, int redraw_flg)
 482 {
 483         cmdedit_termw = cmdedit_prmt_len + 2;
 484         if (w <= cmdedit_termw) {
 485                 cmdedit_termw = cmdedit_termw % w;
 486         }
 487         if (w > cmdedit_termw) {
 488                 cmdedit_termw = w;
 489
 490                 if (redraw_flg) {
 491                         /* new y for current cursor */
 492                         int new_y = (cursor + cmdedit_prmt_len) / w;
 493
 494                         /* redraw */
 495                         redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), len - cursor);
 496                         fflush(stdout);
 497                 }
 498         }
 499 }
 500
 501 static void cmdedit_init(void)
 502 {
 503         cmdedit_prmt_len = 0;
 504         if ((handlers_sets & SET_WCHG_HANDLERS) == 0) {
 505                 /* emulate usage handler to set handler and call yours work */
 506                 win_changed(-SIGWINCH);
 507                 handlers_sets |= SET_WCHG_HANDLERS;
 508         }
 509
 510         if ((handlers_sets & SET_ATEXIT) == 0) {
 511 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 512                 struct passwd *entry;
 513
 514                 my_euid = geteuid();
 515                 entry = getpwuid(my_euid);
 516                 if (entry) {
 517                         user_buf = bb_xstrdup(entry->pw_name);
 518                         home_pwd_buf = bb_xstrdup(entry->pw_dir);
 519                 }
 520 #endif
 521
 522 #ifdef  CONFIG_FEATURE_COMMAND_TAB_COMPLETION
 523
 524 #ifndef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 525                 my_euid = geteuid();
 526 #endif
 527                 my_uid = getuid();
 528                 my_gid = getgid();
 529 #endif  /* CONFIG_FEATURE_COMMAND_TAB_COMPLETION */
 530                 handlers_sets |= SET_ATEXIT;
 531                 atexit(cmdedit_reset_term);     /* be sure to do this only once */
 532         }
 533 }
 534
 535 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
 536
 537 static int is_execute(const struct stat *st)
 538 {
 539         if ((!my_euid && (st->st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) ||
 540                 (my_uid == st->st_uid && (st->st_mode & S_IXUSR)) ||
 541                 (my_gid == st->st_gid && (st->st_mode & S_IXGRP)) ||
 542                 (st->st_mode & S_IXOTH)) return TRUE;
 543         return FALSE;
 544 }
 545
 546 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
 547
 548 static char **username_tab_completion(char *ud, int *num_matches)
 549 {
 550         struct passwd *entry;
 551         int userlen;
 552         char *temp;
 553
 554
 555         ud++;                           /* ~user/... to user/... */
 556         userlen = strlen(ud);
 557
 558         if (num_matches == 0) {         /* "~/..." or "~user/..." */
 559                 char *sav_ud = ud - 1;
 560                 char *home = 0;
 561
 562                 if (*ud == '/') {       /* "~/..."     */
 563                         home = home_pwd_buf;
 564                 } else {
 565                         /* "~user/..." */
 566                         temp = strchr(ud, '/');
 567                         *temp = 0;              /* ~user\0 */
 568                         entry = getpwnam(ud);
 569                         *temp = '/';            /* restore ~user/... */
 570                         ud = temp;
 571                         if (entry)
 572                                 home = entry->pw_dir;
 573                 }
 574                 if (home) {
 575                         if ((userlen + strlen(home) + 1) < BUFSIZ) {
 576                                 char temp2[BUFSIZ];     /* argument size */
 577
 578                                 /* /home/user/... */
 579                                 sprintf(temp2, "%s%s", home, ud);
 580                                 strcpy(sav_ud, temp2);
 581                         }
 582                 }
 583                 return 0;       /* void, result save to argument :-) */
 584         } else {
 585                 /* "~[^/]*" */
 586                 char **matches = (char **) NULL;
 587                 int nm = 0;
 588
 589                 setpwent();
 590
 591                 while ((entry = getpwent()) != NULL) {
 592                         /* Null usernames should result in all users as possible completions. */
 593                         if ( /*!userlen || */ !strncmp(ud, entry->pw_name, userlen)) {
 594
 595                                bb_xasprintf(&temp, "~%s/", entry->pw_name);
 596                                 matches = xrealloc(matches, (nm + 1) * sizeof(char *));
 597
 598                                 matches[nm++] = temp;
 599                         }
 600                 }
 601
 602                 endpwent();
 603                 (*num_matches) = nm;
 604                 return (matches);
 605         }
 606 }
 607 #endif  /* CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION */
 608
 609 enum {
 610         FIND_EXE_ONLY = 0,
 611         FIND_DIR_ONLY = 1,
 612         FIND_FILE_ONLY = 2,
 613 };
 614
 615 static int path_parse(char ***p, int flags)
 616 {
 617         int npth;
 618         char *tmp;
 619         char *pth;
 620
 621         /* if not setenv PATH variable, to search cur dir "." */
 622         if (flags != FIND_EXE_ONLY || (pth = getenv("PATH")) == 0 ||
 623                 /* PATH=<empty> or PATH=:<empty> */
 624                 *pth == 0 || (*pth == ':' && *(pth + 1) == 0)) {
 625                 return 1;
 626         }
 627
 628         tmp = pth;
 629         npth = 0;
 630
 631         for (;;) {
 632                 npth++;                 /* count words is + 1 count ':' */
 633                 tmp = strchr(tmp, ':');
 634                 if (tmp) {
 635                         if (*++tmp == 0)
 636                                 break;  /* :<empty> */
 637                 } else
 638                         break;
 639         }
 640
 641         *p = xmalloc(npth * sizeof(char *));
 642
 643         tmp = pth;
 644         (*p)[0] = bb_xstrdup(tmp);
 645         npth = 1;                       /* count words is + 1 count ':' */
 646
 647         for (;;) {
 648                 tmp = strchr(tmp, ':');
 649                 if (tmp) {
 650                         (*p)[0][(tmp - pth)] = 0;       /* ':' -> '\0' */
 651                         if (*++tmp == 0)
 652                                 break;                  /* :<empty> */
 653                 } else
 654                         break;
 655                 (*p)[npth++] = &(*p)[0][(tmp - pth)];   /* p[next]=p[0][&'\0'+1] */
 656         }
 657
 658         return npth;
 659 }
 660
 661 static char *add_quote_for_spec_chars(char *found)
 662 {
 663         int l = 0;
 664         char *s = xmalloc((strlen(found) + 1) * 2);
 665
 666         while (*found) {
 667                 if (strchr(" `\"#$%^&*()=+{}[]:;\'|\\<>", *found))
 668                         s[l++] = '\\';
 669                 s[l++] = *found++;
 670         }
 671         s[l] = 0;
 672         return s;
 673 }
 674
 675 static char **exe_n_cwd_tab_completion(char *command, int *num_matches,
 676                                         int type)
 677 {
 678
 679         char **matches = 0;
 680         DIR *dir;
 681         struct dirent *next;
 682         char dirbuf[BUFSIZ];
 683         int nm = *num_matches;
 684         struct stat st;
 685         char *path1[1];
 686         char **paths = path1;
 687         int npaths;
 688         int i;
 689         char *found;
 690         char *pfind = strrchr(command, '/');
 691
 692         path1[0] = ".";
 693
 694         if (pfind == NULL) {
 695                 /* no dir, if flags==EXE_ONLY - get paths, else "." */
 696                 npaths = path_parse(&paths, type);
 697                 pfind = command;
 698         } else {
 699                 /* with dir */
 700                 /* save for change */
 701                 strcpy(dirbuf, command);
 702                 /* set dir only */
 703                 dirbuf[(pfind - command) + 1] = 0;
 704 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
 705                 if (dirbuf[0] == '~')   /* ~/... or ~user/... */
 706                         username_tab_completion(dirbuf, 0);
 707 #endif
 708                 /* "strip" dirname in command */
 709                 pfind++;
 710
 711                 paths[0] = dirbuf;
 712                 npaths = 1;                             /* only 1 dir */
 713         }
 714
 715         for (i = 0; i < npaths; i++) {
 716
 717                 dir = opendir(paths[i]);
 718                 if (!dir)                       /* Don't print an error */
 719                         continue;
 720
 721                 while ((next = readdir(dir)) != NULL) {
 722                         char *str_found = next->d_name;
 723
 724                         /* matched ? */
 725                         if (strncmp(str_found, pfind, strlen(pfind)))
 726                                 continue;
 727                         /* not see .name without .match */
 728                         if (*str_found == '.' && *pfind == 0) {
 729                                 if (*paths[i] == '/' && paths[i][1] == 0
 730                                         && str_found[1] == 0) str_found = "";   /* only "/" */
 731                                 else
 732                                         continue;
 733                         }
 734                         found = concat_path_file(paths[i], str_found);
 735                         /* hmm, remover in progress? */
 736                         if (stat(found, &st) < 0)
 737                                 goto cont;
 738                         /* find with dirs ? */
 739                         if (paths[i] != dirbuf)
 740                                 strcpy(found, next->d_name);    /* only name */
 741                         if (S_ISDIR(st.st_mode)) {
 742                                 /* name is directory      */
 743                                 str_found = found;
 744                                 found = concat_path_file(found, "");
 745                                 free(str_found);
 746                                 str_found = add_quote_for_spec_chars(found);
 747                         } else {
 748                                 /* not put found file if search only dirs for cd */
 749                                 if (type == FIND_DIR_ONLY)
 750                                         goto cont;
 751                                 str_found = add_quote_for_spec_chars(found);
 752                                 if (type == FIND_FILE_ONLY ||
 753                                         (type == FIND_EXE_ONLY && is_execute(&st)))
 754                                         strcat(str_found, " ");
 755                         }
 756                         /* Add it to the list */
 757                         matches = xrealloc(matches, (nm + 1) * sizeof(char *));
 758
 759                         matches[nm++] = str_found;
 760 cont:
 761                         free(found);
 762                 }
 763                 closedir(dir);
 764         }
 765         if (paths != path1) {
 766                 free(paths[0]);                 /* allocated memory only in first member */
 767                 free(paths);
 768         }
 769         *num_matches = nm;
 770         return (matches);
 771 }
 772
 773 static int match_compare(const void *a, const void *b)
 774 {
 775         return strcmp(*(char **) a, *(char **) b);
 776 }
 777
 778
 779
 780 #define QUOT    (UCHAR_MAX+1)
 781
 782 #define collapse_pos(is, in) { \
 783         memcpy(int_buf+(is), int_buf+(in), (BUFSIZ+1-(is)-(in))*sizeof(int)); \
 784         memcpy(pos_buf+(is), pos_buf+(in), (BUFSIZ+1-(is)-(in))*sizeof(int)); }
 785
 786 static int find_match(char *matchBuf, int *len_with_quotes)
 787 {
 788         int i, j;
 789         int command_mode;
 790         int c, c2;
 791         int int_buf[BUFSIZ + 1];
 792         int pos_buf[BUFSIZ + 1];
 793
 794         /* set to integer dimension characters and own positions */
 795         for (i = 0;; i++) {
 796                 int_buf[i] = (int) ((unsigned char) matchBuf[i]);
 797                 if (int_buf[i] == 0) {
 798                         pos_buf[i] = -1;        /* indicator end line */
 799                         break;
 800                 } else
 801                         pos_buf[i] = i;
 802         }
 803
 804         /* mask \+symbol and convert '\t' to ' ' */
 805         for (i = j = 0; matchBuf[i]; i++, j++)
 806                 if (matchBuf[i] == '\\') {
 807                         collapse_pos(j, j + 1);
 808                         int_buf[j] |= QUOT;
 809                         i++;
 810 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 811                         if (matchBuf[i] == '\t')        /* algorithm equivalent */
 812                                 int_buf[j] = ' ' | QUOT;
 813 #endif
 814                 }
 815 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 816                 else if (matchBuf[i] == '\t')
 817                         int_buf[j] = ' ';
 818 #endif
 819
 820         /* mask "symbols" or 'symbols' */
 821         c2 = 0;
 822         for (i = 0; int_buf[i]; i++) {
 823                 c = int_buf[i];
 824                 if (c == '\'' || c == '"') {
 825                         if (c2 == 0)
 826                                 c2 = c;
 827                         else {
 828                                 if (c == c2)
 829                                         c2 = 0;
 830                                 else
 831                                         int_buf[i] |= QUOT;
 832                         }
 833                 } else if (c2 != 0 && c != '$')
 834                         int_buf[i] |= QUOT;
 835         }
 836
 837         /* skip commands with arguments if line have commands delimiters */
 838         /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */
 839         for (i = 0; int_buf[i]; i++) {
 840                 c = int_buf[i];
 841                 c2 = int_buf[i + 1];
 842                 j = i ? int_buf[i - 1] : -1;
 843                 command_mode = 0;
 844                 if (c == ';' || c == '&' || c == '|') {
 845                         command_mode = 1 + (c == c2);
 846                         if (c == '&') {
 847                                 if (j == '>' || j == '<')
 848                                         command_mode = 0;
 849                         } else if (c == '|' && j == '>')
 850                                 command_mode = 0;
 851                 }
 852                 if (command_mode) {
 853                         collapse_pos(0, i + command_mode);
 854                         i = -1;                         /* hack incremet */
 855                 }
 856         }
 857         /* collapse `command...` */
 858         for (i = 0; int_buf[i]; i++)
 859                 if (int_buf[i] == '`') {
 860                         for (j = i + 1; int_buf[j]; j++)
 861                                 if (int_buf[j] == '`') {
 862                                         collapse_pos(i, j + 1);
 863                                         j = 0;
 864                                         break;
 865                                 }
 866                         if (j) {
 867                                 /* not found close ` - command mode, collapse all previous */
 868                                 collapse_pos(0, i + 1);
 869                                 break;
 870                         } else
 871                                 i--;                    /* hack incremet */
 872                 }
 873
 874         /* collapse (command...(command...)...) or {command...{command...}...} */
 875         c = 0;                                          /* "recursive" level */
 876         c2 = 0;
 877         for (i = 0; int_buf[i]; i++)
 878                 if (int_buf[i] == '(' || int_buf[i] == '{') {
 879                         if (int_buf[i] == '(')
 880                                 c++;
 881                         else
 882                                 c2++;
 883                         collapse_pos(0, i + 1);
 884                         i = -1;                         /* hack incremet */
 885                 }
 886         for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++)
 887                 if ((int_buf[i] == ')' && c > 0) || (int_buf[i] == '}' && c2 > 0)) {
 888                         if (int_buf[i] == ')')
 889                                 c--;
 890                         else
 891                                 c2--;
 892                         collapse_pos(0, i + 1);
 893                         i = -1;                         /* hack incremet */
 894                 }
 895
 896         /* skip first not quote space */
 897         for (i = 0; int_buf[i]; i++)
 898                 if (int_buf[i] != ' ')
 899                         break;
 900         if (i)
 901                 collapse_pos(0, i);
 902
 903         /* set find mode for completion */
 904         command_mode = FIND_EXE_ONLY;
 905         for (i = 0; int_buf[i]; i++)
 906                 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
 907                         if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
 908                                 && matchBuf[pos_buf[0]]=='c'
 909                                 && matchBuf[pos_buf[1]]=='d' )
 910                                 command_mode = FIND_DIR_ONLY;
 911                         else {
 912                                 command_mode = FIND_FILE_ONLY;
 913                                 break;
 914                         }
 915                 }
 916         /* "strlen" */
 917         for (i = 0; int_buf[i]; i++);
 918         /* find last word */
 919         for (--i; i >= 0; i--) {
 920                 c = int_buf[i];
 921                 if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
 922                         collapse_pos(0, i + 1);
 923                         break;
 924                 }
 925         }
 926         /* skip first not quoted '\'' or '"' */
 927         for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++);
 928         /* collapse quote or unquote // or /~ */
 929         while ((int_buf[i] & ~QUOT) == '/' &&
 930                         ((int_buf[i + 1] & ~QUOT) == '/'
 931                          || (int_buf[i + 1] & ~QUOT) == '~')) {
 932                 i++;
 933         }
 934
 935         /* set only match and destroy quotes */
 936         j = 0;
 937         for (c = 0; pos_buf[i] >= 0; i++) {
 938                 matchBuf[c++] = matchBuf[pos_buf[i]];
 939                 j = pos_buf[i] + 1;
 940         }
 941         matchBuf[c] = 0;
 942         /* old lenght matchBuf with quotes symbols */
 943         *len_with_quotes = j ? j - pos_buf[0] : 0;
 944
 945         return command_mode;
 946 }
 947
 948 /*
 949    display by column original ideas from ls applet,
 950    very optimize by my :)
 951 */
 952 static void showfiles(char **matches, int nfiles)
 953 {
 954         int ncols, row;
 955         int column_width = 0;
 956         int nrows = nfiles;
 957
 958         /* find the longest file name-  use that as the column width */
 959         for (row = 0; row < nrows; row++) {
 960                 int l = strlen(matches[row]);
 961
 962                 if (column_width < l)
 963                         column_width = l;
 964         }
 965         column_width += 2;              /* min space for columns */
 966         ncols = cmdedit_termw / column_width;
 967
 968         if (ncols > 1) {
 969                 nrows /= ncols;
 970                 if(nfiles % ncols)
 971                         nrows++;        /* round up fractionals */
 972                 column_width = -column_width;   /* for printf("%-Ns", ...); */
 973         } else {
 974                 ncols = 1;
 975         }
 976         for (row = 0; row < nrows; row++) {
 977                 int n = row;
 978                 int nc;
 979
 980                 for(nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++)
 981                         printf("%*s", column_width, matches[n]);
 982                 printf("%s\n", matches[n]);
 983         }
 984 }
 985
 986
 987 static void input_tab(int *lastWasTab)
 988 {
 989         /* Do TAB completion */
 990         static int num_matches;
 991         static char **matches;
 992
 993         if (lastWasTab == 0) {          /* free all memory */
 994                 if (matches) {
 995                         while (num_matches > 0)
 996                                 free(matches[--num_matches]);
 997                         free(matches);
 998                         matches = (char **) NULL;
 999                 }
1000                 return;
1001         }
1002         if (! *lastWasTab) {
1003
1004                 char *tmp;
1005                 int len_found;
1006                 char matchBuf[BUFSIZ];
1007                 int find_type;
1008                 int recalc_pos;
1009
1010                 *lastWasTab = TRUE;             /* flop trigger */
1011
1012                 /* Make a local copy of the string -- up
1013                  * to the position of the cursor */
1014                 tmp = strncpy(matchBuf, command_ps, cursor);
1015                 tmp[cursor] = 0;
1016
1017                 find_type = find_match(matchBuf, &recalc_pos);
1018
1019                 /* Free up any memory already allocated */
1020                 input_tab(0);
1021
1022 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
1023                 /* If the word starts with `~' and there is no slash in the word,
1024                  * then try completing this word as a username. */
1025
1026                 if (matchBuf[0] == '~' && strchr(matchBuf, '/') == 0)
1027                         matches = username_tab_completion(matchBuf, &num_matches);
1028 #endif
1029                 /* Try to match any executable in our path and everything
1030                  * in the current working directory that matches.  */
1031                 if (!matches)
1032                         matches =
1033                                 exe_n_cwd_tab_completion(matchBuf,
1034                                         &num_matches, find_type);
1035                 /* Remove duplicate found */
1036                 if(matches) {
1037                         int i, j;
1038                         /* bubble */
1039                         for(i=0; i<(num_matches-1); i++)
1040                                 for(j=i+1; j<num_matches; j++)
1041                                         if(matches[i]!=0 && matches[j]!=0 &&
1042                                                 strcmp(matches[i], matches[j])==0) {
1043                                                         free(matches[j]);
1044                                                         matches[j]=0;
1045                                         }
1046                         j=num_matches;
1047                         num_matches = 0;
1048                         for(i=0; i<j; i++)
1049                                 if(matches[i]) {
1050                                         if(!strcmp(matches[i], "./"))
1051                                                 matches[i][1]=0;
1052                                         else if(!strcmp(matches[i], "../"))
1053                                                 matches[i][2]=0;
1054                                         matches[num_matches++]=matches[i];
1055                                 }
1056                 }
1057                 /* Did we find exactly one match? */
1058                 if (!matches || num_matches > 1) {
1059                         char *tmp1;
1060
1061                         beep();
1062                         if (!matches)
1063                                 return;         /* not found */
1064                         /* sort */
1065                         qsort(matches, num_matches, sizeof(char *), match_compare);
1066
1067                         /* find minimal match */
1068                         tmp = bb_xstrdup(matches[0]);
1069                         for (tmp1 = tmp; *tmp1; tmp1++)
1070                                 for (len_found = 1; len_found < num_matches; len_found++)
1071                                         if (matches[len_found][(tmp1 - tmp)] != *tmp1) {
1072                                                 *tmp1 = 0;
1073                                                 break;
1074                                         }
1075                         if (*tmp == 0) {        /* have unique */
1076                                 free(tmp);
1077                                 return;
1078                         }
1079                 } else {                        /* one match */
1080                         tmp = matches[0];
1081                         /* for next completion current found */
1082                         *lastWasTab = FALSE;
1083                 }
1084
1085                 len_found = strlen(tmp);
1086                 /* have space to placed match? */
1087                 if ((len_found - strlen(matchBuf) + len) < BUFSIZ) {
1088
1089                         /* before word for match   */
1090                         command_ps[cursor - recalc_pos] = 0;
1091                         /* save   tail line        */
1092                         strcpy(matchBuf, command_ps + cursor);
1093                         /* add    match            */
1094                         strcat(command_ps, tmp);
1095                         /* add    tail             */
1096                         strcat(command_ps, matchBuf);
1097                         /* back to begin word for match    */
1098                         input_backward(recalc_pos);
1099                         /* new pos                         */
1100                         recalc_pos = cursor + len_found;
1101                         /* new len                         */
1102                         len = strlen(command_ps);
1103                         /* write out the matched command   */
1104                         redraw(cmdedit_y, len - recalc_pos);
1105                 }
1106                 if (tmp != matches[0])
1107                         free(tmp);
1108         } else {
1109                 /* Ok -- the last char was a TAB.  Since they
1110                  * just hit TAB again, print a list of all the
1111                  * available choices... */
1112                 if (matches && num_matches > 0) {
1113                         int sav_cursor = cursor;        /* change goto_new_line() */
1114
1115                         /* Go to the next line */
1116                         goto_new_line();
1117                         showfiles(matches, num_matches);
1118                         redraw(0, len - sav_cursor);
1119                 }
1120         }
1121 }
1122 #endif  /* CONFIG_FEATURE_COMMAND_TAB_COMPLETION */
1123
1124 #if MAX_HISTORY >= 1
1125 static void get_previous_history(void)
1126 {
1127         if(command_ps[0] != 0 || history[cur_history] == 0) {
1128                 free(history[cur_history]);
1129                 history[cur_history] = bb_xstrdup(command_ps);
1130         }
1131         cur_history--;
1132 }
1133
1134 static int get_next_history(void)
1135 {
1136         int ch = cur_history;
1137
1138         if (ch < n_history) {
1139                 get_previous_history(); /* save the current history line */
1140                 return (cur_history = ch+1);
1141         } else {
1142                 beep();
1143                 return 0;
1144         }
1145 }
1146
1147 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
1148 extern void load_history ( const char *fromfile )
1149 {
1150         FILE *fp;
1151         int hi;
1152
1153         /* cleanup old */
1154
1155         for(hi = n_history; hi > 0; ) {
1156                 hi--;
1157                 free ( history [hi] );
1158         }
1159
1160         if (( fp = fopen ( fromfile, "r" ))) {
1161
1162                 for ( hi = 0; hi < MAX_HISTORY; ) {
1163                         char * hl = bb_get_chomped_line_from_file(fp);
1164                         int l;
1165
1166                         if(!hl)
1167                                 break;
1168                         l = strlen(hl);
1169                         if(l >= BUFSIZ)
1170                                 hl[BUFSIZ-1] = 0;
1171                         if(l == 0 || hl[0] == ' ') {
1172                                 free(hl);
1173                                 continue;
1174                         }
1175                         history [hi++] = hl;
1176                 }
1177                 fclose ( fp );
1178         }
1179         cur_history = n_history = hi;
1180 }
1181
1182 extern void save_history ( const char *tofile )
1183 {
1184         FILE *fp = fopen ( tofile, "w" );
1185
1186         if ( fp ) {
1187                 int i;
1188
1189                 for ( i = 0; i < n_history; i++ ) {
1190                         fputs ( history [i], fp );
1191                         fputc ( '\n', fp );
1192                 }
1193                 fclose ( fp );
1194         }
1195 }
1196 #endif
1197
1198 #endif
1199
1200 enum {
1201         ESC = 27,
1202         DEL = 127,
1203 };
1204
1205
1206 /*
1207  * This function is used to grab a character buffer
1208  * from the input file descriptor and allows you to
1209  * a string with full command editing (sortof like
1210  * a mini readline).
1211  *
1212  * The following standard commands are not implemented:
1213  * ESC-b -- Move back one word
1214  * ESC-f -- Move forward one word
1215  * ESC-d -- Delete back one word
1216  * ESC-h -- Delete forward one word
1217  * CTL-t -- Transpose two characters
1218  *
1219  * Furthermore, the "vi" command editing keys are not implemented.
1220  *
1221  */
1222
1223
1224 int cmdedit_read_input(char *prompt, char command[BUFSIZ])
1225 {
1226
1227         int break_out = 0;
1228         int lastWasTab = FALSE;
1229         unsigned char c = 0;
1230
1231         /* prepare before init handlers */
1232         cmdedit_y = 0;  /* quasireal y, not true work if line > xt*yt */
1233         len = 0;
1234         command_ps = command;
1235
1236         getTermSettings(0, (void *) &initial_settings);
1237         memcpy(&new_settings, &initial_settings, sizeof(struct termios));
1238         new_settings.c_lflag &= ~ICANON;        /* unbuffered input */
1239         /* Turn off echoing and CTRL-C, so we can trap it */
1240         new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
1241 #ifndef linux
1242         /* Hmm, in linux c_cc[] not parsed if set ~ICANON */
1243         new_settings.c_cc[VMIN] = 1;
1244         new_settings.c_cc[VTIME] = 0;
1245         /* Turn off CTRL-C, so we can trap it */
1246 #       ifndef _POSIX_VDISABLE
1247 #               define _POSIX_VDISABLE '\0'
1248 #       endif
1249         new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
1250 #endif
1251         command[0] = 0;
1252
1253         setTermSettings(0, (void *) &new_settings);
1254         handlers_sets |= SET_RESET_TERM;
1255
1256         /* Now initialize things */
1257         cmdedit_init();
1258         /* Print out the command prompt */
1259         parse_prompt(prompt);
1260
1261         while (1) {
1262
1263                 fflush(stdout);                 /* buffered out to fast */
1264
1265                 if (safe_read(0, &c, 1) < 1)
1266                         /* if we can't read input then exit */
1267                         goto prepare_to_die;
1268
1269                 switch (c) {
1270                 case '\n':
1271                 case '\r':
1272                         /* Enter */
1273                         goto_new_line();
1274                         break_out = 1;
1275                         break;
1276                 case 1:
1277                         /* Control-a -- Beginning of line */
1278                         input_backward(cursor);
1279                         break;
1280                 case 2:
1281                         /* Control-b -- Move back one character */
1282                         input_backward(1);
1283                         break;
1284                 case 3:
1285                         /* Control-c -- stop gathering input */
1286                         goto_new_line();
1287                         command[0] = 0;
1288                         len = 0;
1289 #if !defined(CONFIG_ASH)
1290                         lastWasTab = FALSE;
1291                         put_prompt();
1292 #else
1293                         break_out = 2;
1294 #endif
1295                         break;
1296                 case 4:
1297                         /* Control-d -- Delete one character, or exit
1298                          * if the len=0 and no chars to delete */
1299                         if (len == 0) {
1300 prepare_to_die:
1301 #if !defined(CONFIG_ASH)
1302                                 printf("exit");
1303                                 goto_new_line();
1304                                 /* cmdedit_reset_term() called in atexit */
1305                                 exit(EXIT_SUCCESS);
1306 #else
1307                                 break_out = -1; /* for control stoped jobs */
1308                                 break;
1309 #endif
1310                         } else {
1311                                 input_delete();
1312                         }
1313                         break;
1314                 case 5:
1315                         /* Control-e -- End of line */
1316                         input_end();
1317                         break;
1318                 case 6:
1319                         /* Control-f -- Move forward one character */
1320                         input_forward();
1321                         break;
1322                 case '\b':
1323                 case DEL:
1324                         /* Control-h and DEL */
1325                         input_backspace();
1326                         break;
1327                 case '\t':
1328 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
1329                         input_tab(&lastWasTab);
1330 #endif
1331                         break;
1332                 case 11:
1333                         /* Control-k -- clear to end of line */
1334                         *(command + cursor) = 0;
1335                         len = cursor;
1336                         printf("\033[J");
1337                         break;
1338                 case 12:
1339                                 /* Control-l -- clear screen */
1340                         printf("\033[H");
1341                         redraw(0, len-cursor);
1342                         break;
1343 #if MAX_HISTORY >= 1
1344                 case 14:
1345                         /* Control-n -- Get next command in history */
1346                         if (get_next_history())
1347                                 goto rewrite_line;
1348                         break;
1349                 case 16:
1350                         /* Control-p -- Get previous command from history */
1351                         if (cur_history > 0) {
1352                                 get_previous_history();
1353                                 goto rewrite_line;
1354                         } else {
1355                                 beep();
1356                         }
1357                         break;
1358 #endif
1359                 case 21:
1360                         /* Control-U -- Clear line before cursor */
1361                         if (cursor) {
1362                                 strcpy(command, command + cursor);
1363                                 redraw(cmdedit_y, len -= cursor);
1364                         }
1365                         break;
1366                 case ESC:{
1367                         /* escape sequence follows */
1368                         if (safe_read(0, &c, 1) < 1)
1369                                 goto prepare_to_die;
1370                         /* different vt100 emulations */
1371                         if (c == '[' || c == 'O') {
1372                                 if (safe_read(0, &c, 1) < 1)
1373                                         goto prepare_to_die;
1374                         }
1375                         switch (c) {
1376 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
1377                         case '\t':                      /* Alt-Tab */
1378
1379                                 input_tab(&lastWasTab);
1380                                 break;
1381 #endif
1382 #if MAX_HISTORY >= 1
1383                         case 'A':
1384                                 /* Up Arrow -- Get previous command from history */
1385                                 if (cur_history > 0) {
1386                                         get_previous_history();
1387                                         goto rewrite_line;
1388                                 } else {
1389                                         beep();
1390                                 }
1391                                 break;
1392                         case 'B':
1393                                 /* Down Arrow -- Get next command in history */
1394                                 if (!get_next_history())
1395                                 break;
1396                                 /* Rewrite the line with the selected history item */
1397 rewrite_line:
1398                                 /* change command */
1399                                 len = strlen(strcpy(command, history[cur_history]));
1400                                 /* redraw and go to end line */
1401                                 redraw(cmdedit_y, 0);
1402                                 break;
1403 #endif
1404                         case 'C':
1405                                 /* Right Arrow -- Move forward one character */
1406                                 input_forward();
1407                                 break;
1408                         case 'D':
1409                                 /* Left Arrow -- Move back one character */
1410                                 input_backward(1);
1411                                 break;
1412                         case '3':
1413                                 /* Delete */
1414                                 input_delete();
1415                                 break;
1416                         case '1':
1417                         case 'H':
1418                                 /* Home (Ctrl-A) */
1419                                 input_backward(cursor);
1420                                 break;
1421                         case '4':
1422                         case 'F':
1423                                 /* End (Ctrl-E) */
1424                                 input_end();
1425                                 break;
1426                         default:
1427                                 if (!(c >= '1' && c <= '9'))
1428                                         c = 0;
1429                                 beep();
1430                         }
1431                         if (c >= '1' && c <= '9')
1432                                 do
1433                                         if (safe_read(0, &c, 1) < 1)
1434                                                 goto prepare_to_die;
1435                                 while (c != '~');
1436                         break;
1437                 }
1438
1439                 default:        /* If it's regular input, do the normal thing */
1440 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1441                         /* Control-V -- Add non-printable symbol */
1442                         if (c == 22) {
1443                                 if (safe_read(0, &c, 1) < 1)
1444                                         goto prepare_to_die;
1445                                 if (c == 0) {
1446                                         beep();
1447                                         break;
1448                                 }
1449                         } else
1450 #endif
1451                         if (!Isprint(c))        /* Skip non-printable characters */
1452                                 break;
1453
1454                         if (len >= (BUFSIZ - 2))        /* Need to leave space for enter */
1455                                 break;
1456
1457                         len++;
1458
1459                         if (cursor == (len - 1)) {      /* Append if at the end of the line */
1460                                 *(command + cursor) = c;
1461                                 *(command + cursor + 1) = 0;
1462                                 cmdedit_set_out_char(0);
1463                         } else {                        /* Insert otherwise */
1464                                 int sc = cursor;
1465
1466                                 memmove(command + sc + 1, command + sc, len - sc);
1467                                 *(command + sc) = c;
1468                                 sc++;
1469                                 /* rewrite from cursor */
1470                                 input_end();
1471                                 /* to prev x pos + 1 */
1472                                 input_backward(cursor - sc);
1473                         }
1474
1475                         break;
1476                 }
1477                 if (break_out)                  /* Enter is the command terminator, no more input. */
1478                         break;
1479
1480                 if (c != '\t')
1481                         lastWasTab = FALSE;
1482         }
1483
1484         setTermSettings(0, (void *) &initial_settings);
1485         handlers_sets &= ~SET_RESET_TERM;
1486
1487 #if MAX_HISTORY >= 1
1488         /* Handle command history log */
1489         /* cleanup may be saved current command line */
1490         free(history[MAX_HISTORY]);
1491         history[MAX_HISTORY] = 0;
1492         if (len) {                                      /* no put empty line */
1493                 int i = n_history;
1494                         /* After max history, remove the oldest command */
1495                 if (i >= MAX_HISTORY) {
1496                         free(history[0]);
1497                         for(i = 0; i < (MAX_HISTORY-1); i++)
1498                                 history[i] = history[i+1];
1499                 }
1500                 history[i++] = bb_xstrdup(command);
1501                 cur_history = i;
1502                 n_history = i;
1503 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1504                 num_ok_lines++;
1505 #endif
1506         }
1507 #else  /* MAX_HISTORY < 1 */
1508 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1509         if (len) {              /* no put empty line */
1510                 num_ok_lines++;
1511         }
1512 #endif
1513 #endif  /* MAX_HISTORY >= 1 */
1514         if(break_out == 1) {
1515                 command[len++] = '\n';          /* set '\n' */
1516                 command[len] = 0;
1517         }
1518 #if defined(CONFIG_FEATURE_CLEAN_UP) && defined(CONFIG_FEATURE_COMMAND_TAB_COMPLETION)
1519         input_tab(0);                           /* strong free */
1520 #endif
1521 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1522         free(cmdedit_prompt);
1523 #endif
1524         cmdedit_reset_term();
1525 #if !defined(CONFIG_ASH)
1526         return len;
1527 #else
1528         return break_out < 0 ? break_out : len;
1529 #endif
1530 }
1531
1532
1533
1534 #endif  /* CONFIG_FEATURE_COMMAND_EDITING */
1535
1536
1537 #ifdef TEST
1538
1539 const char *bb_applet_name = "debug stuff usage";
1540 const char *memory_exhausted = "Memory exhausted";
1541
1542 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1543 #include <locale.h>
1544 #endif
1545
1546 int main(int argc, char **argv)
1547 {
1548         char buff[BUFSIZ];
1549         char *prompt =
1550 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1551                 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:\
1552 \\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] \
1553 \\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
1554 #else
1555                 "% ";
1556 #endif
1557
1558 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1559         setlocale(LC_ALL, "");
1560 #endif
1561         while(1) {
1562                 int l;
1563                 cmdedit_read_input(prompt, buff);
1564                 l = strlen(buff);
1565                 if(l==0)
1566                         break;
1567                 if(l > 0 && buff[l-1] == '\n')
1568                         buff[l-1] = 0;
1569                 printf("*** cmdedit_read_input() returned line =%s=\n", buff);
1570         }
1571         printf("*** cmdedit_read_input() detect ^C\n");
1572         return 0;
1573 }
1574
1575 #endif  /* TEST */