cmdedit.c

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