shell/cmdedit.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Termios command line History and Editting.
   4  *
   5  * Copyright (c) 1986-2001 may safely be consumed by a BSD or GPL license.
   6  * Written by:   Vladimir Oleynik <dzo@simtreas.ru>
   7  *
   8  * Used ideas:
   9  *      Adam Rogoyski    <rogoyski@cs.utexas.edu>
  10  *      Dave Cinege      <dcinege@psychosis.com>
  11  *      Jakub Jelinek (c) 1995
  12  *      Erik Andersen    <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 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
  93 struct history {
  94         char *s;
  95         struct history *p;
  96         struct history *n;
  97 };
  98
  99 /* Maximum length of the linked list for the command line history */
 100 static const int MAX_HISTORY = 15;
 101
 102 /* First element in command line list */
 103 static struct history *his_front = NULL;
 104
 105 /* Last element in command line list */
 106 static struct history *his_end = NULL;
 107
 108
 109 #include <termios.h>
 110 #define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
 111 #define getTermSettings(fd,argp) tcgetattr(fd, argp);
 112
 113 /* Current termio and the previous termio before starting sh */
 114 static struct termios initial_settings, new_settings;
 115
 116
 117 static
 118 volatile int cmdedit_termw = 80;        /* actual terminal width */
 119 static int history_counter = 0; /* Number of commands in history list */
 120 static
 121 volatile int handlers_sets = 0; /* Set next bites: */
 122
 123 enum {
 124         SET_ATEXIT = 1,         /* when atexit() has been called
 125                                    and get euid,uid,gid to fast compare */
 126         SET_WCHG_HANDLERS = 2,  /* winchg signal handler */
 127         SET_RESET_TERM = 4,     /* if the terminal needs to be reset upon exit */
 128 };
 129
 130
 131 static int cmdedit_x;           /* real x terminal position */
 132 static int cmdedit_y;           /* pseudoreal y terminal position */
 133 static int cmdedit_prmt_len;    /* lenght prompt without colores string */
 134
 135 static int cursor;              /* required global for signal handler */
 136 static int len;                 /* --- "" - - "" - -"- --""-- --""--- */
 137 static char *command_ps;        /* --- "" - - "" - -"- --""-- --""--- */
 138 static
 139 #ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
 140         const
 141 #endif
 142 char *cmdedit_prompt;           /* --- "" - - "" - -"- --""-- --""--- */
 143
 144 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 145 static char *user_buf = "";
 146 static char *home_pwd_buf = "";
 147 static int my_euid;
 148 #endif
 149
 150 #ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
 151 static char *hostname_buf = "";
 152 static int num_ok_lines = 1;
 153 #endif
 154
 155
 156 #ifdef  CONFIG_FEATURE_COMMAND_TAB_COMPLETION
 157
 158 #ifndef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 159 static int my_euid;
 160 #endif
 161
 162 static int my_uid;
 163 static int my_gid;
 164
 165 #endif  /* CONFIG_FEATURE_COMMAND_TAB_COMPLETION */
 166
 167 /* It seems that libc5 doesn't know what a sighandler_t is... */
 168 #if (__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1)
 169 typedef void (*sighandler_t) (int);
 170 #endif
 171
 172 static void cmdedit_setwidth(int w, int redraw_flg);
 173
 174 static void win_changed(int nsig)
 175 {
 176         struct winsize win = { 0, 0, 0, 0 };
 177         static sighandler_t previous_SIGWINCH_handler;  /* for reset */
 178
 179         /*   emulate      || signal call */
 180         if (nsig == -SIGWINCH || nsig == SIGWINCH) {
 181                 ioctl(0, TIOCGWINSZ, &win);
 182                 if (win.ws_col > 0) {
 183                         cmdedit_setwidth(win.ws_col, nsig == SIGWINCH);
 184                 }
 185         }
 186         /* Unix not all standart in recall signal */
 187
 188         if (nsig == -SIGWINCH)          /* save previous handler   */
 189                 previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
 190         else if (nsig == SIGWINCH)      /* signaled called handler */
 191                 signal(SIGWINCH, win_changed);  /* set for next call       */
 192         else                                            /* nsig == 0 */
 193                 /* set previous handler    */
 194                 signal(SIGWINCH, previous_SIGWINCH_handler);    /* reset    */
 195 }
 196
 197 static void cmdedit_reset_term(void)
 198 {
 199         if ((handlers_sets & SET_RESET_TERM) != 0) {
 200 /* sparc and other have broken termios support: use old termio handling. */
 201                 setTermSettings(fileno(stdin), (void *) &initial_settings);
 202                 handlers_sets &= ~SET_RESET_TERM;
 203         }
 204         if ((handlers_sets & SET_WCHG_HANDLERS) != 0) {
 205                 /* reset SIGWINCH handler to previous (default) */
 206                 win_changed(0);
 207                 handlers_sets &= ~SET_WCHG_HANDLERS;
 208         }
 209         fflush(stdout);
 210 #if 0
 211 //#ifdef CONFIG_FEATURE_CLEAN_UP
 212         if (his_front) {
 213                 struct history *n;
 214
 215                 while (his_front != his_end) {
 216                         n = his_front->n;
 217                         free(his_front->s);
 218                         free(his_front);
 219                         his_front = n;
 220                 }
 221         }
 222 #endif
 223 }
 224
 225
 226 /* special for recount position for scroll and remove terminal margin effect */
 227 static void cmdedit_set_out_char(int next_char)
 228 {
 229
 230         int c = (int)((unsigned char) command_ps[cursor]);
 231
 232         if (c == 0)
 233                 c = ' ';        /* destroy end char? */
 234 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 235         if (!Isprint(c)) {      /* Inverse put non-printable characters */
 236                 if (c >= 128)
 237                         c -= 128;
 238                 if (c < ' ')
 239                         c += '@';
 240                 if (c == 127)
 241                         c = '?';
 242                 printf("\033[7m%c\033[0m", c);
 243         } else
 244 #endif
 245                 putchar(c);
 246         if (++cmdedit_x >= cmdedit_termw) {
 247                 /* terminal is scrolled down */
 248                 cmdedit_y++;
 249                 cmdedit_x = 0;
 250
 251                 if (!next_char)
 252                         next_char = ' ';
 253                 /* destroy "(auto)margin" */
 254                 putchar(next_char);
 255                 putchar('\b');
 256         }
 257         cursor++;
 258 }
 259
 260 /* Move to end line. Bonus: rewrite line from cursor */
 261 static void input_end(void)
 262 {
 263         while (cursor < len)
 264                 cmdedit_set_out_char(0);
 265 }
 266
 267 /* Go to the next line */
 268 static void goto_new_line(void)
 269 {
 270         input_end();
 271         if (cmdedit_x)
 272                 putchar('\n');
 273 }
 274
 275
 276 static inline void out1str(const char *s)
 277 {
 278         fputs(s, stdout);
 279 }
 280 static inline void beep(void)
 281 {
 282         putchar('\007');
 283 }
 284
 285 /* Move back one charactor */
 286 /* special for slow terminal */
 287 static void input_backward(int num)
 288 {
 289         if (num > cursor)
 290                 num = cursor;
 291         cursor -= num;          /* new cursor (in command, not terminal) */
 292
 293         if (cmdedit_x >= num) {         /* no to up line */
 294                 cmdedit_x -= num;
 295                 if (num < 4)
 296                         while (num-- > 0)
 297                                 putchar('\b');
 298
 299                 else
 300                         printf("\033[%dD", num);
 301         } else {
 302                 int count_y;
 303
 304                 if (cmdedit_x) {
 305                         putchar('\r');          /* back to first terminal pos.  */
 306                         num -= cmdedit_x;       /* set previous backward        */
 307                 }
 308                 count_y = 1 + num / cmdedit_termw;
 309                 printf("\033[%dA", count_y);
 310                 cmdedit_y -= count_y;
 311                 /*  require  forward  after  uping   */
 312                 cmdedit_x = cmdedit_termw * count_y - num;
 313                 printf("\033[%dC", cmdedit_x);  /* set term cursor   */
 314         }
 315 }
 316
 317 static void put_prompt(void)
 318 {
 319         out1str(cmdedit_prompt);
 320         cmdedit_x = cmdedit_prmt_len;   /* count real x terminal position */
 321         cursor = 0;
 322         cmdedit_y = 0;                  /* new quasireal y */
 323 }
 324
 325 #ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
 326 static void parse_prompt(const char *prmt_ptr)
 327 {
 328         cmdedit_prompt = prmt_ptr;
 329         cmdedit_prmt_len = strlen(prmt_ptr);
 330         put_prompt();
 331 }
 332 #else
 333 static void parse_prompt(const char *prmt_ptr)
 334 {
 335         int prmt_len = 0;
 336         int sub_len = 0;
 337         char  flg_not_length = '[';
 338         char *prmt_mem_ptr = xcalloc(1, 1);
 339         char *pwd_buf = xgetcwd(0);
 340         char  buf2[PATH_MAX + 1];
 341         char  buf[2];
 342         char  c;
 343         char *pbuf;
 344
 345         if (!pwd_buf) {
 346                 pwd_buf=(char *)unknown;
 347         }
 348
 349         while (*prmt_ptr) {
 350                 pbuf    = buf;
 351                 pbuf[1] = 0;
 352                 c = *prmt_ptr++;
 353                 if (c == '\\') {
 354                         const char *cp = prmt_ptr;
 355                         int l;
 356
 357                         c = process_escape_sequence(&prmt_ptr);
 358                         if(prmt_ptr==cp) {
 359                           if (*cp == 0)
 360                                 break;
 361                           c = *prmt_ptr++;
 362                           switch (c) {
 363 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 364                           case 'u':
 365                                 pbuf = user_buf;
 366                                 break;
 367 #endif
 368                           case 'h':
 369                                 pbuf = hostname_buf;
 370                                 if (*pbuf == 0) {
 371                                         pbuf = xcalloc(256, 1);
 372                                         if (gethostname(pbuf, 255) < 0) {
 373                                                 strcpy(pbuf, "?");
 374                                         } else {
 375                                                 char *s = strchr(pbuf, '.');
 376
 377                                                 if (s)
 378                                                         *s = 0;
 379                                         }
 380                                         hostname_buf = pbuf;
 381                                 }
 382                                 break;
 383                           case '$':
 384                                 c = my_euid == 0 ? '#' : '$';
 385                                 break;
 386 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 387                           case 'w':
 388                                 pbuf = pwd_buf;
 389                                 l = strlen(home_pwd_buf);
 390                                 if (home_pwd_buf[0] != 0 &&
 391                                     strncmp(home_pwd_buf, pbuf, l) == 0 &&
 392                                     (pbuf[l]=='/' || pbuf[l]=='\0') &&
 393                                     strlen(pwd_buf+l)<PATH_MAX) {
 394                                         pbuf = buf2;
 395                                         *pbuf = '~';
 396                                         strcpy(pbuf+1, pwd_buf+l);
 397                                         }
 398                                 break;
 399 #endif
 400                           case 'W':
 401                                 pbuf = pwd_buf;
 402                                 cp = strrchr(pbuf,'/');
 403                                 if ( (cp != NULL) && (cp != pbuf) )
 404                                         pbuf += (cp-pbuf)+1;
 405                                 break;
 406                           case '!':
 407                                 snprintf(pbuf = buf2, sizeof(buf2), "%d", num_ok_lines);
 408                                 break;
 409                           case 'e': case 'E':     /* \e \E = \033 */
 410                                 c = '\033';
 411                                 break;
 412                           case 'x': case 'X':
 413                                 for (l = 0; l < 3;) {
 414                                         int h;
 415                                         buf2[l++] = *prmt_ptr;
 416                                         buf2[l] = 0;
 417                                         h = strtol(buf2, &pbuf, 16);
 418                                         if (h > UCHAR_MAX || (pbuf - buf2) < l) {
 419                                                 l--;
 420                                                 break;
 421                                         }
 422                                         prmt_ptr++;
 423                                 }
 424                                 buf2[l] = 0;
 425                                 c = (char)strtol(buf2, 0, 16);
 426                                 if(c==0)
 427                                         c = '?';
 428                                 pbuf = buf;
 429                                 break;
 430                           case '[': case ']':
 431                                 if (c == flg_not_length) {
 432                                         flg_not_length = flg_not_length == '[' ? ']' : '[';
 433                                         continue;
 434                                 }
 435                                 break;
 436                           }
 437                         }
 438                 }
 439                 if(pbuf == buf)
 440                         *pbuf = c;
 441                 prmt_len += strlen(pbuf);
 442                 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
 443                 if (flg_not_length == ']')
 444                         sub_len++;
 445         }
 446         if(pwd_buf!=(char *)unknown)
 447                 free(pwd_buf);
 448         cmdedit_prompt = prmt_mem_ptr;
 449         cmdedit_prmt_len = prmt_len - sub_len;
 450         put_prompt();
 451 }
 452 #endif
 453
 454
 455 /* draw promt, editor line, and clear tail */
 456 static void redraw(int y, int back_cursor)
 457 {
 458         if (y > 0)                              /* up to start y */
 459                 printf("\033[%dA", y);
 460         putchar('\r');
 461         put_prompt();
 462         input_end();                            /* rewrite */
 463         printf("\033[J");                       /* destroy tail after cursor */
 464         input_backward(back_cursor);
 465 }
 466
 467 /* Delete the char in front of the cursor */
 468 static void input_delete(void)
 469 {
 470         int j = cursor;
 471
 472         if (j == len)
 473                 return;
 474
 475         strcpy(command_ps + j, command_ps + j + 1);
 476         len--;
 477         input_end();                    /* rewtite new line */
 478         cmdedit_set_out_char(0);        /* destroy end char */
 479         input_backward(cursor - j);     /* back to old pos cursor */
 480 }
 481
 482 /* Delete the char in back of the cursor */
 483 static void input_backspace(void)
 484 {
 485         if (cursor > 0) {
 486                 input_backward(1);
 487                 input_delete();
 488         }
 489 }
 490
 491
 492 /* Move forward one charactor */
 493 static void input_forward(void)
 494 {
 495         if (cursor < len)
 496                 cmdedit_set_out_char(command_ps[cursor + 1]);
 497 }
 498
 499
 500 static void cmdedit_setwidth(int w, int redraw_flg)
 501 {
 502         cmdedit_termw = cmdedit_prmt_len + 2;
 503         if (w <= cmdedit_termw) {
 504                 cmdedit_termw = cmdedit_termw % w;
 505         }
 506         if (w > cmdedit_termw) {
 507                 cmdedit_termw = w;
 508
 509                 if (redraw_flg) {
 510                         /* new y for current cursor */
 511                         int new_y = (cursor + cmdedit_prmt_len) / w;
 512
 513                         /* redraw */
 514                         redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), len - cursor);
 515                         fflush(stdout);
 516                 }
 517         }
 518 }
 519
 520 static void cmdedit_init(void)
 521 {
 522         cmdedit_prmt_len = 0;
 523         if ((handlers_sets & SET_WCHG_HANDLERS) == 0) {
 524                 /* emulate usage handler to set handler and call yours work */
 525                 win_changed(-SIGWINCH);
 526                 handlers_sets |= SET_WCHG_HANDLERS;
 527         }
 528
 529         if ((handlers_sets & SET_ATEXIT) == 0) {
 530 #ifdef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 531                 struct passwd *entry;
 532
 533                 my_euid = geteuid();
 534                 entry = getpwuid(my_euid);
 535                 if (entry) {
 536                         user_buf = xstrdup(entry->pw_name);
 537                         home_pwd_buf = xstrdup(entry->pw_dir);
 538                 }
 539 #endif
 540
 541 #ifdef  CONFIG_FEATURE_COMMAND_TAB_COMPLETION
 542
 543 #ifndef CONFIG_FEATURE_GETUSERNAME_AND_HOMEDIR
 544                 my_euid = geteuid();
 545 #endif
 546                 my_uid = getuid();
 547                 my_gid = getgid();
 548 #endif  /* CONFIG_FEATURE_COMMAND_TAB_COMPLETION */
 549                 handlers_sets |= SET_ATEXIT;
 550                 atexit(cmdedit_reset_term);     /* be sure to do this only once */
 551         }
 552 }
 553
 554 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
 555
 556 static int is_execute(const struct stat *st)
 557 {
 558         if ((!my_euid && (st->st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) ||
 559                 (my_uid == st->st_uid && (st->st_mode & S_IXUSR)) ||
 560                 (my_gid == st->st_gid && (st->st_mode & S_IXGRP)) ||
 561                 (st->st_mode & S_IXOTH)) return TRUE;
 562         return FALSE;
 563 }
 564
 565 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
 566
 567 static char **username_tab_completion(char *ud, int *num_matches)
 568 {
 569         struct passwd *entry;
 570         int userlen;
 571         char *temp;
 572
 573
 574         ud++;                           /* ~user/... to user/... */
 575         userlen = strlen(ud);
 576
 577         if (num_matches == 0) {         /* "~/..." or "~user/..." */
 578                 char *sav_ud = ud - 1;
 579                 char *home = 0;
 580
 581                 if (*ud == '/') {       /* "~/..."     */
 582                         home = home_pwd_buf;
 583                 } else {
 584                         /* "~user/..." */
 585                         temp = strchr(ud, '/');
 586                         *temp = 0;              /* ~user\0 */
 587                         entry = getpwnam(ud);
 588                         *temp = '/';            /* restore ~user/... */
 589                         ud = temp;
 590                         if (entry)
 591                                 home = entry->pw_dir;
 592                 }
 593                 if (home) {
 594                         if ((userlen + strlen(home) + 1) < BUFSIZ) {
 595                                 char temp2[BUFSIZ];     /* argument size */
 596
 597                                 /* /home/user/... */
 598                                 sprintf(temp2, "%s%s", home, ud);
 599                                 strcpy(sav_ud, temp2);
 600                         }
 601                 }
 602                 return 0;       /* void, result save to argument :-) */
 603         } else {
 604                 /* "~[^/]*" */
 605                 char **matches = (char **) NULL;
 606                 int nm = 0;
 607
 608                 setpwent();
 609
 610                 while ((entry = getpwent()) != NULL) {
 611                         /* Null usernames should result in all users as possible completions. */
 612                         if ( /*!userlen || */ !strncmp(ud, entry->pw_name, userlen)) {
 613
 614                                 temp = xmalloc(3 + strlen(entry->pw_name));
 615                                 sprintf(temp, "~%s/", entry->pw_name);
 616                                 matches = xrealloc(matches, (nm + 1) * sizeof(char *));
 617
 618                                 matches[nm++] = temp;
 619                         }
 620                 }
 621
 622                 endpwent();
 623                 (*num_matches) = nm;
 624                 return (matches);
 625         }
 626 }
 627 #endif  /* CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION */
 628
 629 enum {
 630         FIND_EXE_ONLY = 0,
 631         FIND_DIR_ONLY = 1,
 632         FIND_FILE_ONLY = 2,
 633 };
 634
 635 static int path_parse(char ***p, int flags)
 636 {
 637         int npth;
 638         char *tmp;
 639         char *pth;
 640
 641         /* if not setenv PATH variable, to search cur dir "." */
 642         if (flags != FIND_EXE_ONLY || (pth = getenv("PATH")) == 0 ||
 643                 /* PATH=<empty> or PATH=:<empty> */
 644                 *pth == 0 || (*pth == ':' && *(pth + 1) == 0)) {
 645                 return 1;
 646         }
 647
 648         tmp = pth;
 649         npth = 0;
 650
 651         for (;;) {
 652                 npth++;                 /* count words is + 1 count ':' */
 653                 tmp = strchr(tmp, ':');
 654                 if (tmp) {
 655                         if (*++tmp == 0)
 656                                 break;  /* :<empty> */
 657                 } else
 658                         break;
 659         }
 660
 661         *p = xmalloc(npth * sizeof(char *));
 662
 663         tmp = pth;
 664         (*p)[0] = xstrdup(tmp);
 665         npth = 1;                       /* count words is + 1 count ':' */
 666
 667         for (;;) {
 668                 tmp = strchr(tmp, ':');
 669                 if (tmp) {
 670                         (*p)[0][(tmp - pth)] = 0;       /* ':' -> '\0' */
 671                         if (*++tmp == 0)
 672                                 break;                  /* :<empty> */
 673                 } else
 674                         break;
 675                 (*p)[npth++] = &(*p)[0][(tmp - pth)];   /* p[next]=p[0][&'\0'+1] */
 676         }
 677
 678         return npth;
 679 }
 680
 681 static char *add_quote_for_spec_chars(char *found)
 682 {
 683         int l = 0;
 684         char *s = xmalloc((strlen(found) + 1) * 2);
 685
 686         while (*found) {
 687                 if (strchr(" `\"#$%^&*()=+{}[]:;\'|\\<>", *found))
 688                         s[l++] = '\\';
 689                 s[l++] = *found++;
 690         }
 691         s[l] = 0;
 692         return s;
 693 }
 694
 695 static char **exe_n_cwd_tab_completion(char *command, int *num_matches,
 696                                         int type)
 697 {
 698
 699         char **matches = 0;
 700         DIR *dir;
 701         struct dirent *next;
 702         char dirbuf[BUFSIZ];
 703         int nm = *num_matches;
 704         struct stat st;
 705         char *path1[1];
 706         char **paths = path1;
 707         int npaths;
 708         int i;
 709         char *found;
 710         char *pfind = strrchr(command, '/');
 711
 712         path1[0] = ".";
 713
 714         if (pfind == NULL) {
 715                 /* no dir, if flags==EXE_ONLY - get paths, else "." */
 716                 npaths = path_parse(&paths, type);
 717                 pfind = command;
 718         } else {
 719                 /* with dir */
 720                 /* save for change */
 721                 strcpy(dirbuf, command);
 722                 /* set dir only */
 723                 dirbuf[(pfind - command) + 1] = 0;
 724 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
 725                 if (dirbuf[0] == '~')   /* ~/... or ~user/... */
 726                         username_tab_completion(dirbuf, 0);
 727 #endif
 728                 /* "strip" dirname in command */
 729                 pfind++;
 730
 731                 paths[0] = dirbuf;
 732                 npaths = 1;                             /* only 1 dir */
 733         }
 734
 735         for (i = 0; i < npaths; i++) {
 736
 737                 dir = opendir(paths[i]);
 738                 if (!dir)                       /* Don't print an error */
 739                         continue;
 740
 741                 while ((next = readdir(dir)) != NULL) {
 742                         char *str_found = next->d_name;
 743
 744                         /* matched ? */
 745                         if (strncmp(str_found, pfind, strlen(pfind)))
 746                                 continue;
 747                         /* not see .name without .match */
 748                         if (*str_found == '.' && *pfind == 0) {
 749                                 if (*paths[i] == '/' && paths[i][1] == 0
 750                                         && str_found[1] == 0) str_found = "";   /* only "/" */
 751                                 else
 752                                         continue;
 753                         }
 754                         found = concat_path_file(paths[i], str_found);
 755                         /* hmm, remover in progress? */
 756                         if (stat(found, &st) < 0)
 757                                 goto cont;
 758                         /* find with dirs ? */
 759                         if (paths[i] != dirbuf)
 760                                 strcpy(found, next->d_name);    /* only name */
 761                         if (S_ISDIR(st.st_mode)) {
 762                                 /* name is directory      */
 763                                 str_found = found;
 764                                 found = concat_path_file(found, "");
 765                                 free(str_found);
 766                                 str_found = add_quote_for_spec_chars(found);
 767                         } else {
 768                                 /* not put found file if search only dirs for cd */
 769                                 if (type == FIND_DIR_ONLY)
 770                                         goto cont;
 771                                 str_found = add_quote_for_spec_chars(found);
 772                                 if (type == FIND_FILE_ONLY ||
 773                                         (type == FIND_EXE_ONLY && is_execute(&st)))
 774                                         strcat(str_found, " ");
 775                         }
 776                         /* Add it to the list */
 777                         matches = xrealloc(matches, (nm + 1) * sizeof(char *));
 778
 779                         matches[nm++] = str_found;
 780 cont:
 781                         free(found);
 782                 }
 783                 closedir(dir);
 784         }
 785         if (paths != path1) {
 786                 free(paths[0]);                 /* allocated memory only in first member */
 787                 free(paths);
 788         }
 789         *num_matches = nm;
 790         return (matches);
 791 }
 792
 793 static int match_compare(const void *a, const void *b)
 794 {
 795         return strcmp(*(char **) a, *(char **) b);
 796 }
 797
 798
 799
 800 #define QUOT    (UCHAR_MAX+1)
 801
 802 #define collapse_pos(is, in) { \
 803         memcpy(int_buf+(is), int_buf+(in), (BUFSIZ+1-(is)-(in))*sizeof(int)); \
 804         memcpy(pos_buf+(is), pos_buf+(in), (BUFSIZ+1-(is)-(in))*sizeof(int)); }
 805
 806 static int find_match(char *matchBuf, int *len_with_quotes)
 807 {
 808         int i, j;
 809         int command_mode;
 810         int c, c2;
 811         int int_buf[BUFSIZ + 1];
 812         int pos_buf[BUFSIZ + 1];
 813
 814         /* set to integer dimension characters and own positions */
 815         for (i = 0;; i++) {
 816                 int_buf[i] = (int) ((unsigned char) matchBuf[i]);
 817                 if (int_buf[i] == 0) {
 818                         pos_buf[i] = -1;        /* indicator end line */
 819                         break;
 820                 } else
 821                         pos_buf[i] = i;
 822         }
 823
 824         /* mask \+symbol and convert '\t' to ' ' */
 825         for (i = j = 0; matchBuf[i]; i++, j++)
 826                 if (matchBuf[i] == '\\') {
 827                         collapse_pos(j, j + 1);
 828                         int_buf[j] |= QUOT;
 829                         i++;
 830 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 831                         if (matchBuf[i] == '\t')        /* algorithm equivalent */
 832                                 int_buf[j] = ' ' | QUOT;
 833 #endif
 834                 }
 835 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
 836                 else if (matchBuf[i] == '\t')
 837                         int_buf[j] = ' ';
 838 #endif
 839
 840         /* mask "symbols" or 'symbols' */
 841         c2 = 0;
 842         for (i = 0; int_buf[i]; i++) {
 843                 c = int_buf[i];
 844                 if (c == '\'' || c == '"') {
 845                         if (c2 == 0)
 846                                 c2 = c;
 847                         else {
 848                                 if (c == c2)
 849                                         c2 = 0;
 850                                 else
 851                                         int_buf[i] |= QUOT;
 852                         }
 853                 } else if (c2 != 0 && c != '$')
 854                         int_buf[i] |= QUOT;
 855         }
 856
 857         /* skip commands with arguments if line have commands delimiters */
 858         /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */
 859         for (i = 0; int_buf[i]; i++) {
 860                 c = int_buf[i];
 861                 c2 = int_buf[i + 1];
 862                 j = i ? int_buf[i - 1] : -1;
 863                 command_mode = 0;
 864                 if (c == ';' || c == '&' || c == '|') {
 865                         command_mode = 1 + (c == c2);
 866                         if (c == '&') {
 867                                 if (j == '>' || j == '<')
 868                                         command_mode = 0;
 869                         } else if (c == '|' && j == '>')
 870                                 command_mode = 0;
 871                 }
 872                 if (command_mode) {
 873                         collapse_pos(0, i + command_mode);
 874                         i = -1;                         /* hack incremet */
 875                 }
 876         }
 877         /* collapse `command...` */
 878         for (i = 0; int_buf[i]; i++)
 879                 if (int_buf[i] == '`') {
 880                         for (j = i + 1; int_buf[j]; j++)
 881                                 if (int_buf[j] == '`') {
 882                                         collapse_pos(i, j + 1);
 883                                         j = 0;
 884                                         break;
 885                                 }
 886                         if (j) {
 887                                 /* not found close ` - command mode, collapse all previous */
 888                                 collapse_pos(0, i + 1);
 889                                 break;
 890                         } else
 891                                 i--;                    /* hack incremet */
 892                 }
 893
 894         /* collapse (command...(command...)...) or {command...{command...}...} */
 895         c = 0;                                          /* "recursive" level */
 896         c2 = 0;
 897         for (i = 0; int_buf[i]; i++)
 898                 if (int_buf[i] == '(' || int_buf[i] == '{') {
 899                         if (int_buf[i] == '(')
 900                                 c++;
 901                         else
 902                                 c2++;
 903                         collapse_pos(0, i + 1);
 904                         i = -1;                         /* hack incremet */
 905                 }
 906         for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++)
 907                 if ((int_buf[i] == ')' && c > 0) || (int_buf[i] == '}' && c2 > 0)) {
 908                         if (int_buf[i] == ')')
 909                                 c--;
 910                         else
 911                                 c2--;
 912                         collapse_pos(0, i + 1);
 913                         i = -1;                         /* hack incremet */
 914                 }
 915
 916         /* skip first not quote space */
 917         for (i = 0; int_buf[i]; i++)
 918                 if (int_buf[i] != ' ')
 919                         break;
 920         if (i)
 921                 collapse_pos(0, i);
 922
 923         /* set find mode for completion */
 924         command_mode = FIND_EXE_ONLY;
 925         for (i = 0; int_buf[i]; i++)
 926                 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
 927                         if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
 928                                 && matchBuf[pos_buf[0]]=='c'
 929                                 && matchBuf[pos_buf[1]]=='d' )
 930                                 command_mode = FIND_DIR_ONLY;
 931                         else {
 932                                 command_mode = FIND_FILE_ONLY;
 933                                 break;
 934                         }
 935                 }
 936         /* "strlen" */
 937         for (i = 0; int_buf[i]; i++);
 938         /* find last word */
 939         for (--i; i >= 0; i--) {
 940                 c = int_buf[i];
 941                 if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
 942                         collapse_pos(0, i + 1);
 943                         break;
 944                 }
 945         }
 946         /* skip first not quoted '\'' or '"' */
 947         for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++);
 948         /* collapse quote or unquote // or /~ */
 949         while ((int_buf[i] & ~QUOT) == '/' &&
 950                         ((int_buf[i + 1] & ~QUOT) == '/'
 951                          || (int_buf[i + 1] & ~QUOT) == '~')) {
 952                 i++;
 953         }
 954
 955         /* set only match and destroy quotes */
 956         j = 0;
 957         for (c = 0; pos_buf[i] >= 0; i++) {
 958                 matchBuf[c++] = matchBuf[pos_buf[i]];
 959                 j = pos_buf[i] + 1;
 960         }
 961         matchBuf[c] = 0;
 962         /* old lenght matchBuf with quotes symbols */
 963         *len_with_quotes = j ? j - pos_buf[0] : 0;
 964
 965         return command_mode;
 966 }
 967
 968
 969 static void input_tab(int *lastWasTab)
 970 {
 971         /* Do TAB completion */
 972         static int num_matches;
 973         static char **matches;
 974
 975         if (lastWasTab == 0) {          /* free all memory */
 976                 if (matches) {
 977                         while (num_matches > 0)
 978                                 free(matches[--num_matches]);
 979                         free(matches);
 980                         matches = (char **) NULL;
 981                 }
 982                 return;
 983         }
 984         if (! *lastWasTab) {
 985
 986                 char *tmp;
 987                 int len_found;
 988                 char matchBuf[BUFSIZ];
 989                 int find_type;
 990                 int recalc_pos;
 991
 992                 *lastWasTab = TRUE;             /* flop trigger */
 993
 994                 /* Make a local copy of the string -- up
 995                  * to the position of the cursor */
 996                 tmp = strncpy(matchBuf, command_ps, cursor);
 997                 tmp[cursor] = 0;
 998
 999                 find_type = find_match(matchBuf, &recalc_pos);
1000
1001                 /* Free up any memory already allocated */
1002                 input_tab(0);
1003
1004 #ifdef CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
1005                 /* If the word starts with `~' and there is no slash in the word,
1006                  * then try completing this word as a username. */
1007
1008                 if (matchBuf[0] == '~' && strchr(matchBuf, '/') == 0)
1009                         matches = username_tab_completion(matchBuf, &num_matches);
1010 #endif
1011                 /* Try to match any executable in our path and everything
1012                  * in the current working directory that matches.  */
1013                 if (!matches)
1014                         matches =
1015                                 exe_n_cwd_tab_completion(matchBuf,
1016                                         &num_matches, find_type);
1017                 /* Remove duplicate found */
1018                 if(matches) {
1019                         int i, j;
1020                         /* bubble */
1021                         for(i=0; i<(num_matches-1); i++)
1022                                 for(j=i+1; j<num_matches; j++)
1023                                         if(matches[i]!=0 && matches[j]!=0 &&
1024                                                 strcmp(matches[i], matches[j])==0) {
1025                                                         free(matches[j]);
1026                                                         matches[j]=0;
1027                                         }
1028                         j=num_matches;
1029                         num_matches = 0;
1030                         for(i=0; i<j; i++)
1031                                 if(matches[i]) {
1032                                         if(!strcmp(matches[i], "./"))
1033                                                 matches[i][1]=0;
1034                                         else if(!strcmp(matches[i], "../"))
1035                                                 matches[i][2]=0;
1036                                         matches[num_matches++]=matches[i];
1037                                 }
1038                 }
1039                 /* Did we find exactly one match? */
1040                 if (!matches || num_matches > 1) {
1041                         char *tmp1;
1042
1043                         beep();
1044                         if (!matches)
1045                                 return;         /* not found */
1046                         /* sort */
1047                         qsort(matches, num_matches, sizeof(char *), match_compare);
1048
1049                         /* find minimal match */
1050                         tmp = xstrdup(matches[0]);
1051                         for (tmp1 = tmp; *tmp1; tmp1++)
1052                                 for (len_found = 1; len_found < num_matches; len_found++)
1053                                         if (matches[len_found][(tmp1 - tmp)] != *tmp1) {
1054                                                 *tmp1 = 0;
1055                                                 break;
1056                                         }
1057                         if (*tmp == 0) {        /* have unique */
1058                                 free(tmp);
1059                                 return;
1060                         }
1061                 } else {                        /* one match */
1062                         tmp = matches[0];
1063                         /* for next completion current found */
1064                         *lastWasTab = FALSE;
1065                 }
1066
1067                 len_found = strlen(tmp);
1068                 /* have space to placed match? */
1069                 if ((len_found - strlen(matchBuf) + len) < BUFSIZ) {
1070
1071                         /* before word for match   */
1072                         command_ps[cursor - recalc_pos] = 0;
1073                         /* save   tail line        */
1074                         strcpy(matchBuf, command_ps + cursor);
1075                         /* add    match            */
1076                         strcat(command_ps, tmp);
1077                         /* add    tail             */
1078                         strcat(command_ps, matchBuf);
1079                         /* back to begin word for match    */
1080                         input_backward(recalc_pos);
1081                         /* new pos                         */
1082                         recalc_pos = cursor + len_found;
1083                         /* new len                         */
1084                         len = strlen(command_ps);
1085                         /* write out the matched command   */
1086                         redraw(cmdedit_y, len - recalc_pos);
1087                 }
1088                 if (tmp != matches[0])
1089                         free(tmp);
1090         } else {
1091                 /* Ok -- the last char was a TAB.  Since they
1092                  * just hit TAB again, print a list of all the
1093                  * available choices... */
1094                 if (matches && num_matches > 0) {
1095                         int i, col, l;
1096                         int sav_cursor = cursor;        /* change goto_new_line() */
1097
1098                         /* Go to the next line */
1099                         goto_new_line();
1100                         for (i = 0, col = 0; i < num_matches; i++) {
1101                                 l = strlen(matches[i]);
1102                                 if (l < 14)
1103                                         l = 14;
1104                                 printf("%-14s  ", matches[i]);
1105                                 if ((l += 2) > 16)
1106                                         while (l % 16) {
1107                                                 putchar(' ');
1108                                                 l++;
1109                                         }
1110                                 col += l;
1111                                 col -= (col / cmdedit_termw) * cmdedit_termw;
1112                                 if (col > 60 && matches[i + 1] != NULL) {
1113                                         putchar('\n');
1114                                         col = 0;
1115                                 }
1116                         }
1117                         /* Go to the next line and rewrite */
1118                         putchar('\n');
1119                         redraw(0, len - sav_cursor);
1120                 }
1121         }
1122 }
1123 #endif  /* CONFIG_FEATURE_COMMAND_TAB_COMPLETION */
1124
1125 static void get_previous_history(struct history **hp, struct history *p)
1126 {
1127         if ((*hp)->s)
1128                 free((*hp)->s);
1129         (*hp)->s = xstrdup(command_ps);
1130         *hp = p;
1131 }
1132
1133 static inline void get_next_history(struct history **hp)
1134 {
1135         get_previous_history(hp, (*hp)->n);
1136 }
1137
1138 enum {
1139         ESC = 27,
1140         DEL = 127,
1141 };
1142
1143
1144 /*
1145  * This function is used to grab a character buffer
1146  * from the input file descriptor and allows you to
1147  * a string with full command editing (sortof like
1148  * a mini readline).
1149  *
1150  * The following standard commands are not implemented:
1151  * ESC-b -- Move back one word
1152  * ESC-f -- Move forward one word
1153  * ESC-d -- Delete back one word
1154  * ESC-h -- Delete forward one word
1155  * CTL-t -- Transpose two characters
1156  *
1157  * Furthermore, the "vi" command editing keys are not implemented.
1158  *
1159  */
1160
1161
1162 int cmdedit_read_input(char *prompt, char command[BUFSIZ])
1163 {
1164
1165         int break_out = 0;
1166         int lastWasTab = FALSE;
1167         unsigned char c = 0;
1168         struct history *hp = his_end;
1169
1170         /* prepare before init handlers */
1171         cmdedit_y = 0;  /* quasireal y, not true work if line > xt*yt */
1172         len = 0;
1173         command_ps = command;
1174
1175         getTermSettings(0, (void *) &initial_settings);
1176         memcpy(&new_settings, &initial_settings, sizeof(struct termios));
1177         new_settings.c_lflag &= ~ICANON;        /* unbuffered input */
1178         /* Turn off echoing and CTRL-C, so we can trap it */
1179         new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
1180 #ifndef linux
1181         /* Hmm, in linux c_cc[] not parsed if set ~ICANON */
1182         new_settings.c_cc[VMIN] = 1;
1183         new_settings.c_cc[VTIME] = 0;
1184         /* Turn off CTRL-C, so we can trap it */
1185 #       ifndef _POSIX_VDISABLE
1186 #               define _POSIX_VDISABLE '\0'
1187 #       endif
1188         new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
1189 #endif
1190         command[0] = 0;
1191
1192         setTermSettings(0, (void *) &new_settings);
1193         handlers_sets |= SET_RESET_TERM;
1194
1195         /* Now initialize things */
1196         cmdedit_init();
1197         /* Print out the command prompt */
1198         parse_prompt(prompt);
1199
1200         while (1) {
1201
1202                 fflush(stdout);                 /* buffered out to fast */
1203
1204                 if (safe_read(0, &c, 1) < 1)
1205                         /* if we can't read input then exit */
1206                         goto prepare_to_die;
1207
1208                 switch (c) {
1209                 case '\n':
1210                 case '\r':
1211                         /* Enter */
1212                         goto_new_line();
1213                         break_out = 1;
1214                         break;
1215                 case 1:
1216                         /* Control-a -- Beginning of line */
1217                         input_backward(cursor);
1218                         break;
1219                 case 2:
1220                         /* Control-b -- Move back one character */
1221                         input_backward(1);
1222                         break;
1223                 case 3:
1224                         /* Control-c -- stop gathering input */
1225                         goto_new_line();
1226                         command[0] = 0;
1227                         len = 0;
1228                         lastWasTab = FALSE;
1229                         put_prompt();
1230                         break;
1231                 case 4:
1232                         /* Control-d -- Delete one character, or exit
1233                          * if the len=0 and no chars to delete */
1234                         if (len == 0) {
1235 prepare_to_die:
1236 #if !defined(CONFIG_ASH)
1237                                 printf("exit");
1238                                 goto_new_line();
1239                                 /* cmdedit_reset_term() called in atexit */
1240                                 exit(EXIT_SUCCESS);
1241 #else
1242                                 break_out = -1; /* for control stoped jobs */
1243                                 break;
1244 #endif
1245                         } else {
1246                                 input_delete();
1247                         }
1248                         break;
1249                 case 5:
1250                         /* Control-e -- End of line */
1251                         input_end();
1252                         break;
1253                 case 6:
1254                         /* Control-f -- Move forward one character */
1255                         input_forward();
1256                         break;
1257                 case '\b':
1258                 case DEL:
1259                         /* Control-h and DEL */
1260                         input_backspace();
1261                         break;
1262                 case '\t':
1263 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
1264                         input_tab(&lastWasTab);
1265 #endif
1266                         break;
1267                 case 11:
1268                         /* Control-k -- clear to end of line */
1269                         *(command + cursor) = 0;
1270                         len = cursor;
1271                         printf("\033[J");
1272                         break;
1273                 case 12:
1274                         {
1275                                 /* Control-l -- clear screen */
1276                                 int old_cursor = cursor;
1277                                 printf("\033[H");
1278                                 redraw(0, len-old_cursor);
1279                         }
1280                         break;
1281                 case 14:
1282                         /* Control-n -- Get next command in history */
1283                         if (hp && hp->n && hp->n->s) {
1284                                 get_next_history(&hp);
1285                                 goto rewrite_line;
1286                         } else {
1287                                 beep();
1288                         }
1289                         break;
1290                 case 16:
1291                         /* Control-p -- Get previous command from history */
1292                         if (hp && hp->p) {
1293                                 get_previous_history(&hp, hp->p);
1294                                 goto rewrite_line;
1295                         } else {
1296                                 beep();
1297                         }
1298                         break;
1299                 case 21:
1300                         /* Control-U -- Clear line before cursor */
1301                         if (cursor) {
1302                                 strcpy(command, command + cursor);
1303                                 redraw(cmdedit_y, len -= cursor);
1304                         }
1305                         break;
1306                 case ESC:{
1307                         /* escape sequence follows */
1308                         if (safe_read(0, &c, 1) < 1)
1309                                 goto prepare_to_die;
1310                         /* different vt100 emulations */
1311                         if (c == '[' || c == 'O') {
1312                                 if (safe_read(0, &c, 1) < 1)
1313                                         goto prepare_to_die;
1314                         }
1315                         switch (c) {
1316 #ifdef CONFIG_FEATURE_COMMAND_TAB_COMPLETION
1317                         case '\t':                      /* Alt-Tab */
1318
1319                                 input_tab(&lastWasTab);
1320                                 break;
1321 #endif
1322                         case 'A':
1323                                 /* Up Arrow -- Get previous command from history */
1324                                 if (hp && hp->p) {
1325                                         get_previous_history(&hp, hp->p);
1326                                         goto rewrite_line;
1327                                 } else {
1328                                         beep();
1329                                 }
1330                                 break;
1331                         case 'B':
1332                                 /* Down Arrow -- Get next command in history */
1333                                 if (hp && hp->n && hp->n->s) {
1334                                         get_next_history(&hp);
1335                                         goto rewrite_line;
1336                                 } else {
1337                                         beep();
1338                                 }
1339                                 break;
1340
1341                                 /* Rewrite the line with the selected history item */
1342                           rewrite_line:
1343                                 /* change command */
1344                                 len = strlen(strcpy(command, hp->s));
1345                                 /* redraw and go to end line */
1346                                 redraw(cmdedit_y, 0);
1347                                 break;
1348                         case 'C':
1349                                 /* Right Arrow -- Move forward one character */
1350                                 input_forward();
1351                                 break;
1352                         case 'D':
1353                                 /* Left Arrow -- Move back one character */
1354                                 input_backward(1);
1355                                 break;
1356                         case '3':
1357                                 /* Delete */
1358                                 input_delete();
1359                                 break;
1360                         case '1':
1361                         case 'H':
1362                                 /* Home (Ctrl-A) */
1363                                 input_backward(cursor);
1364                                 break;
1365                         case '4':
1366                         case 'F':
1367                                 /* End (Ctrl-E) */
1368                                 input_end();
1369                                 break;
1370                         default:
1371                                 if (!(c >= '1' && c <= '9'))
1372                                         c = 0;
1373                                 beep();
1374                         }
1375                         if (c >= '1' && c <= '9')
1376                                 do
1377                                         if (safe_read(0, &c, 1) < 1)
1378                                                 goto prepare_to_die;
1379                                 while (c != '~');
1380                         break;
1381                 }
1382
1383                 default:        /* If it's regular input, do the normal thing */
1384 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1385                         /* Control-V -- Add non-printable symbol */
1386                         if (c == 22) {
1387                                 if (safe_read(0, &c, 1) < 1)
1388                                         goto prepare_to_die;
1389                                 if (c == 0) {
1390                                         beep();
1391                                         break;
1392                                 }
1393                         } else
1394 #endif
1395                         if (!Isprint(c))        /* Skip non-printable characters */
1396                                 break;
1397
1398                         if (len >= (BUFSIZ - 2))        /* Need to leave space for enter */
1399                                 break;
1400
1401                         len++;
1402
1403                         if (cursor == (len - 1)) {      /* Append if at the end of the line */
1404                                 *(command + cursor) = c;
1405                                 *(command + cursor + 1) = 0;
1406                                 cmdedit_set_out_char(0);
1407                         } else {                        /* Insert otherwise */
1408                                 int sc = cursor;
1409
1410                                 memmove(command + sc + 1, command + sc, len - sc);
1411                                 *(command + sc) = c;
1412                                 sc++;
1413                                 /* rewrite from cursor */
1414                                 input_end();
1415                                 /* to prev x pos + 1 */
1416                                 input_backward(cursor - sc);
1417                         }
1418
1419                         break;
1420                 }
1421                 if (break_out)                  /* Enter is the command terminator, no more input. */
1422                         break;
1423
1424                 if (c != '\t')
1425                         lastWasTab = FALSE;
1426         }
1427
1428         setTermSettings(0, (void *) &initial_settings);
1429         handlers_sets &= ~SET_RESET_TERM;
1430
1431         /* Handle command history log */
1432         if (len) {                                      /* no put empty line */
1433
1434                 struct history *h = his_end;
1435                 char *ss;
1436
1437                 ss = xstrdup(command);  /* duplicate */
1438
1439                 if (h == 0) {
1440                         /* No previous history -- this memory is never freed */
1441                         h = his_front = xmalloc(sizeof(struct history));
1442                         h->n = xmalloc(sizeof(struct history));
1443
1444                         h->p = NULL;
1445                         h->s = ss;
1446                         h->n->p = h;
1447                         h->n->n = NULL;
1448                         h->n->s = NULL;
1449                         his_end = h->n;
1450                         history_counter++;
1451                 } else {
1452                         /* Add a new history command -- this memory is never freed */
1453                         h->n = xmalloc(sizeof(struct history));
1454
1455                         h->n->p = h;
1456                         h->n->n = NULL;
1457                         h->n->s = NULL;
1458                         h->s = ss;
1459                         his_end = h->n;
1460
1461                         /* After max history, remove the oldest command */
1462                         if (history_counter >= MAX_HISTORY) {
1463
1464                                 struct history *p = his_front->n;
1465
1466                                 p->p = NULL;
1467                                 free(his_front->s);
1468                                 free(his_front);
1469                                 his_front = p;
1470                         } else {
1471                                 history_counter++;
1472                         }
1473                 }
1474 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1475                 num_ok_lines++;
1476 #endif
1477         }
1478         if(break_out>0) {
1479         command[len++] = '\n';          /* set '\n' */
1480         command[len] = 0;
1481         }
1482 #if defined(CONFIG_FEATURE_CLEAN_UP) && defined(CONFIG_FEATURE_COMMAND_TAB_COMPLETION)
1483         input_tab(0);                           /* strong free */
1484 #endif
1485 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1486         free(cmdedit_prompt);
1487 #endif
1488         cmdedit_reset_term();
1489         return len;
1490 }
1491
1492
1493
1494 #endif  /* CONFIG_FEATURE_COMMAND_EDITING */
1495
1496
1497 #ifdef TEST
1498
1499 const char *applet_name = "debug stuff usage";
1500 const char *memory_exhausted = "Memory exhausted";
1501
1502 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1503 #include <locale.h>
1504 #endif
1505
1506 int main(int argc, char **argv)
1507 {
1508         char buff[BUFSIZ];
1509         char *prompt =
1510 #if defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1511                 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:\
1512 \\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] \
1513 \\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
1514 #else
1515                 "% ";
1516 #endif
1517
1518 #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
1519         setlocale(LC_ALL, "");
1520 #endif
1521         while(1) {
1522                 int l;
1523                 cmdedit_read_input(prompt, buff);
1524                 l = strlen(buff);
1525                 if(l==0)
1526                         break;
1527                 if(l > 0 && buff[l-1] == '\n')
1528                         buff[l-1] = 0;
1529                 printf("*** cmdedit_read_input() returned line =%s=\n", buff);
1530         }
1531         printf("*** cmdedit_read_input() detect ^C\n");
1532         return 0;
1533 }
1534
1535 #endif  /* TEST */