builtins/pushd.def

   1 This file is pushd.def, from which is created pushd.c.  It implements the
   2 builtins "pushd", "popd", and "dirs" in Bash.
   3
   4 Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
   5
   6 This file is part of GNU Bash, the Bourne Again SHell.
   7
   8 Bash is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License along
  19 with Bash; see the file COPYING.  If not, write to the Free Software
  20 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
  21
  22 $PRODUCES pushd.c
  23
  24 $BUILTIN pushd
  25 $FUNCTION pushd_builtin
  26 $DEPENDS_ON PUSHD_AND_POPD
  27 $SHORT_DOC pushd [dir | +N | -N] [-n]
  28 Adds a directory to the top of the directory stack, or rotates
  29 the stack, making the new top of the stack the current working
  30 directory.  With no arguments, exchanges the top two directories.
  31
  32 +N      Rotates the stack so that the Nth directory (counting
  33         from the left of the list shown by `dirs', starting with
  34         zero) is at the top.
  35
  36 -N      Rotates the stack so that the Nth directory (counting
  37         from the right of the list shown by `dirs', starting with
  38         zero) is at the top.
  39
  40 -n      suppress the normal change of directory when adding directories
  41         to the stack, so only the stack is manipulated.
  42
  43 dir     adds DIR to the directory stack at the top, making it the
  44         new current working directory.
  45
  46 You can see the directory stack with the `dirs' command.
  47 $END
  48
  49 $BUILTIN popd
  50 $FUNCTION popd_builtin
  51 $DEPENDS_ON PUSHD_AND_POPD
  52 $SHORT_DOC popd [+N | -N] [-n]
  53 Removes entries from the directory stack.  With no arguments,
  54 removes the top directory from the stack, and cd's to the new
  55 top directory.
  56
  57 +N      removes the Nth entry counting from the left of the list
  58         shown by `dirs', starting with zero.  For example: `popd +0'
  59         removes the first directory, `popd +1' the second.
  60
  61 -N      removes the Nth entry counting from the right of the list
  62         shown by `dirs', starting with zero.  For example: `popd -0'
  63         removes the last directory, `popd -1' the next to last.
  64
  65 -n      suppress the normal change of directory when removing directories
  66         from the stack, so only the stack is manipulated.
  67
  68 You can see the directory stack with the `dirs' command.
  69 $END
  70
  71 $BUILTIN dirs
  72 $FUNCTION dirs_builtin
  73 $DEPENDS_ON PUSHD_AND_POPD
  74 $SHORT_DOC dirs [-clpv] [+N] [-N]
  75 Display the list of currently remembered directories.  Directories
  76 find their way onto the list with the `pushd' command; you can get
  77 back up through the list with the `popd' command.
  78
  79 The -l flag specifies that `dirs' should not print shorthand versions
  80 of directories which are relative to your home directory.  This means
  81 that `~/bin' might be displayed as `/homes/bfox/bin'.  The -v flag
  82 causes `dirs' to print the directory stack with one entry per line,
  83 prepending the directory name with its position in the stack.  The -p
  84 flag does the same thing, but the stack position is not prepended.
  85 The -c flag clears the directory stack by deleting all of the elements.
  86
  87 +N      displays the Nth entry counting from the left of the list shown by
  88         dirs when invoked without options, starting with zero.
  89
  90 -N      displays the Nth entry counting from the right of the list shown by
  91         dirs when invoked without options, starting with zero.
  92 $END
  93
  94 #include <config.h>
  95
  96 #if defined (PUSHD_AND_POPD)
  97 #include <stdio.h>
  98 #ifndef _MINIX
  99 #  include <sys/param.h>
 100 #endif
 101
 102 #if defined (HAVE_UNISTD_H)
 103 #  ifdef _MINIX
 104 #    include <sys/types.h>
 105 #  endif
 106 #  include <unistd.h>
 107 #endif
 108
 109 #include "../bashansi.h"
 110
 111 #include <errno.h>
 112
 113 #include <tilde/tilde.h>
 114
 115 #include "../shell.h"
 116 #include "maxpath.h"
 117 #include "common.h"
 118 #include "builtext.h"
 119
 120 #ifdef LOADABLE_BUILTIN
 121 #  include "builtins.h"
 122 #endif
 123
 124 #if !defined (errno)
 125 extern int errno;
 126 #endif /* !errno */
 127
 128 static char *m_badarg = "%s: bad argument";
 129
 130 /* The list of remembered directories. */
 131 static char **pushd_directory_list = (char **)NULL;
 132
 133 /* Number of existing slots in this list. */
 134 static int directory_list_size;
 135
 136 /* Offset to the end of the list. */
 137 static int directory_list_offset;
 138
 139 static void pushd_error ();
 140 static void clear_directory_stack ();
 141 static int cd_to_string ();
 142 static int change_to_temp ();
 143 static int get_dirstack_index ();
 144 static void add_dirstack_element ();
 145
 146 #define NOCD            0x01
 147 #define ROTATE          0x02
 148 #define LONGFORM        0x04
 149 #define CLEARSTAK       0x08
 150
 151 int
 152 pushd_builtin (list)
 153      WORD_LIST *list;
 154 {
 155   char *temp, *current_directory, *top;
 156   int j, flags;
 157   long num;
 158   char direction;
 159
 160   /* If there is no argument list then switch current and
 161      top of list. */
 162   if (list == 0)
 163     {
 164       if (directory_list_offset == 0)
 165         {
 166           builtin_error ("no other directory");
 167           return (EXECUTION_FAILURE);
 168         }
 169
 170       current_directory = get_working_directory ("pushd");
 171       if (current_directory == 0)
 172         return (EXECUTION_FAILURE);
 173
 174       j = directory_list_offset - 1;
 175       temp = pushd_directory_list[j];
 176       pushd_directory_list[j] = current_directory;
 177       j = change_to_temp (temp);
 178       free (temp);
 179       return j;
 180     }
 181
 182   for (flags = 0; list; list = list->next)
 183     {
 184       if (ISOPTION (list->word->word, 'n'))
 185         {
 186           flags |= NOCD;
 187         }
 188       else if (ISOPTION (list->word->word, '-'))
 189         {
 190           list = list->next;
 191           break;
 192         }
 193       else if (list->word->word[0] == '-' && list->word->word[1] == '\0')
 194         /* Let `pushd -' work like it used to. */
 195         break;
 196       else if (((direction = list->word->word[0]) == '+') || direction == '-')
 197         {
 198           if (legal_number (list->word->word + 1, &num) == 0)
 199             {
 200               builtin_error (m_badarg, list->word->word);
 201               builtin_usage ();
 202               return (EXECUTION_FAILURE);
 203             }
 204
 205           if (direction == '-')
 206             num = directory_list_offset - num;
 207
 208           if (num > directory_list_offset || num < 0)
 209             {
 210               pushd_error (directory_list_offset, list->word->word);
 211               return (EXECUTION_FAILURE);
 212             }
 213           flags |= ROTATE;
 214         }
 215       else if (*list->word->word == '-')
 216         {
 217           bad_option (list->word->word);
 218           builtin_usage ();
 219           return (EXECUTION_FAILURE);
 220         }
 221       else
 222         break;
 223     }
 224
 225   if (flags & ROTATE)
 226     {
 227       /* Rotate the stack num times.  Remember, the current
 228          directory acts like it is part of the stack. */
 229       temp = get_working_directory ("pushd");
 230
 231       if (num == 0)
 232         {
 233           j = ((flags & NOCD) == 0) ? change_to_temp (temp) : EXECUTION_SUCCESS;
 234           free (temp);
 235           return j;
 236         }
 237
 238       do
 239         {
 240           top = pushd_directory_list[directory_list_offset - 1];
 241
 242           for (j = directory_list_offset - 2; j > -1; j--)
 243             pushd_directory_list[j + 1] = pushd_directory_list[j];
 244
 245           pushd_directory_list[j + 1] = temp;
 246
 247           temp = top;
 248           num--;
 249         }
 250       while (num);
 251
 252       j = ((flags & NOCD) == 0) ? change_to_temp (temp) : EXECUTION_SUCCESS;
 253       free (temp);
 254       return j;
 255     }
 256
 257   if (list == 0)
 258     return (EXECUTION_SUCCESS);
 259
 260   /* Change to the directory in list->word->word.  Save the current
 261      directory on the top of the stack. */
 262   current_directory = get_working_directory ("pushd");
 263   if (current_directory == 0)
 264     return (EXECUTION_FAILURE);
 265
 266   j = ((flags & NOCD) == 0) ? cd_builtin (list) : EXECUTION_SUCCESS;
 267   if (j == EXECUTION_SUCCESS)
 268     {
 269       add_dirstack_element ((flags & NOCD) ? savestring (list->word->word) : current_directory);
 270       dirs_builtin ((WORD_LIST *)NULL);
 271       if (flags & NOCD)
 272         free (current_directory);
 273       return (EXECUTION_SUCCESS);
 274     }
 275   else
 276     {
 277       free (current_directory);
 278       return (EXECUTION_FAILURE);
 279     }
 280 }
 281
 282 /* Pop the directory stack, and then change to the new top of the stack.
 283    If LIST is non-null it should consist of a word +N or -N, which says
 284    what element to delete from the stack.  The default is the top one. */
 285 int
 286 popd_builtin (list)
 287      WORD_LIST *list;
 288 {
 289   register int i;
 290   long which;
 291   int flags;
 292   char direction;
 293   char *which_word;
 294
 295   which_word = (char *)NULL;
 296   for (flags = 0, which = 0L, direction = '+'; list; list = list->next)
 297     {
 298       if (ISOPTION (list->word->word, 'n'))
 299         {
 300           flags |= NOCD;
 301         }
 302       else if (ISOPTION (list->word->word, '-'))
 303         {
 304           list = list->next;
 305           break;
 306         }
 307       else if (((direction = list->word->word[0]) == '+') || direction == '-')
 308         {
 309           if (legal_number (list->word->word + 1, &which) == 0)
 310             {
 311               builtin_error (m_badarg, list->word->word);
 312               builtin_usage ();
 313               return (EXECUTION_FAILURE);
 314             }
 315           which_word = list->word->word;
 316         }
 317       else if (*list->word->word == '-')
 318         {
 319           bad_option (list->word->word);
 320           builtin_usage ();
 321           return (EXECUTION_FAILURE);
 322         }
 323       else
 324         break;
 325     }
 326
 327   if (which > directory_list_offset || (directory_list_offset == 0 && which == 0))
 328     {
 329       pushd_error (directory_list_offset, which_word ? which_word : "");
 330       return (EXECUTION_FAILURE);
 331     }
 332
 333   /* Handle case of no specification, or top of stack specification. */
 334   if ((direction == '+' && which == 0) ||
 335       (direction == '-' && which == directory_list_offset))
 336     {
 337       i = ((flags & NOCD) == 0) ? cd_to_string (pushd_directory_list[directory_list_offset - 1])
 338                                 : EXECUTION_SUCCESS;
 339       if (i != EXECUTION_SUCCESS)
 340         return (i);
 341       free (pushd_directory_list[--directory_list_offset]);
 342     }
 343   else
 344     {
 345       /* Since an offset other than the top directory was specified,
 346          remove that directory from the list and shift the remainder
 347          of the list into place. */
 348       i = (direction == '+') ? directory_list_offset - which : which;
 349       free (pushd_directory_list[i]);
 350       directory_list_offset--;
 351
 352       /* Shift the remainder of the list into place. */
 353       for (; i < directory_list_offset; i++)
 354         pushd_directory_list[i] = pushd_directory_list[i + 1];
 355     }
 356
 357   dirs_builtin ((WORD_LIST *)NULL);
 358   return (EXECUTION_SUCCESS);
 359 }
 360
 361 /* Print the current list of directories on the directory stack. */
 362 int
 363 dirs_builtin (list)
 364      WORD_LIST *list;
 365 {
 366   int flags, desired_index, index_flag, vflag;
 367   long i;
 368   char *temp, *w;
 369
 370   for (flags = vflag = index_flag = 0, desired_index = -1, w = ""; list; list = list->next)
 371     {
 372       if (ISOPTION (list->word->word, 'l'))
 373         {
 374           flags |= LONGFORM;
 375         }
 376       else if (ISOPTION (list->word->word, 'c'))
 377         {
 378           flags |= CLEARSTAK;
 379         }
 380       else if (ISOPTION (list->word->word, 'v'))
 381         {
 382           vflag |= 2;
 383         }
 384       else if (ISOPTION (list->word->word, 'p'))
 385         {
 386           vflag |= 1;
 387         }
 388       else if (ISOPTION (list->word->word, '-'))
 389         {
 390           list = list->next;
 391           break;
 392         }
 393       else if (*list->word->word == '+' || *list->word->word == '-')
 394         {
 395           int sign;
 396           if (legal_number (w = list->word->word + 1, &i) == 0)
 397             {
 398               builtin_error (m_badarg, list->word->word);
 399               builtin_usage ();
 400               return (EXECUTION_FAILURE);
 401             }
 402           sign = (*list->word->word == '+') ? 1 : -1;
 403           desired_index = get_dirstack_index (i, sign, &index_flag);
 404         }
 405       else
 406         {
 407           bad_option (list->word->word);
 408           builtin_usage ();
 409           return (EXECUTION_FAILURE);
 410         }
 411     }
 412
 413   if (flags & CLEARSTAK)
 414     {
 415       clear_directory_stack ();
 416       return (EXECUTION_SUCCESS);
 417     }
 418
 419   if (index_flag && (desired_index < 0 || desired_index > directory_list_offset))
 420     {
 421       pushd_error (directory_list_offset, w);
 422       return (EXECUTION_FAILURE);
 423     }
 424
 425 #define DIRSTACK_FORMAT(temp) \
 426   (flags & LONGFORM) ? temp : polite_directory_format (temp)
 427
 428   /* The first directory printed is always the current working directory. */
 429   if (index_flag == 0 || (index_flag == 1 && desired_index == 0))
 430     {
 431       temp = get_working_directory ("dirs");
 432       if (temp == 0)
 433         temp = savestring ("<no current directory>");
 434       if (vflag & 2)
 435         printf ("%2d  %s", 0, DIRSTACK_FORMAT (temp));
 436       else
 437         printf ("%s", DIRSTACK_FORMAT (temp));
 438       free (temp);
 439       if (index_flag)
 440         {
 441           putchar ('\n');
 442           return EXECUTION_SUCCESS;
 443         }
 444     }
 445
 446 #define DIRSTACK_ENTRY(i) \
 447   (flags & LONGFORM) ? pushd_directory_list[i] \
 448                      : polite_directory_format (pushd_directory_list[i])
 449
 450   /* Now print the requested directory stack entries. */
 451   if (index_flag)
 452     {
 453       if (vflag & 2)
 454         printf ("%2d  %s", directory_list_offset - desired_index,
 455                            DIRSTACK_ENTRY (desired_index));
 456       else
 457         printf ("%s", DIRSTACK_ENTRY (desired_index));
 458     }
 459   else
 460     for (i = directory_list_offset - 1; i >= 0; i--)
 461       if (vflag >= 2)
 462         printf ("\n%2d  %s", directory_list_offset - (int)i, DIRSTACK_ENTRY (i));
 463       else
 464         printf ("%s%s", (vflag & 1) ? "\n" : " ", DIRSTACK_ENTRY (i));
 465
 466   putchar ('\n');
 467   fflush (stdout);
 468   return (EXECUTION_SUCCESS);
 469 }
 470
 471 static void
 472 pushd_error (offset, arg)
 473      int offset;
 474      char *arg;
 475 {
 476   if (offset == 0)
 477     builtin_error ("directory stack empty");
 478   else if (arg)
 479     builtin_error ("%s: bad directory stack index", arg);
 480   else
 481     builtin_error ("bad directory stack index");
 482 }
 483
 484 static void
 485 clear_directory_stack ()
 486 {
 487   register int i;
 488
 489   for (i = 0; i < directory_list_offset; i++)
 490     free (pushd_directory_list[i]);
 491   directory_list_offset = 0;
 492 }
 493
 494 /* Switch to the directory in NAME.  This uses the cd_builtin to do the work,
 495    so if the result is EXECUTION_FAILURE then an error message has already
 496    been printed. */
 497 static int
 498 cd_to_string (name)
 499      char *name;
 500 {
 501   WORD_LIST *tlist;
 502   int result;
 503
 504   tlist = make_word_list (make_word (name), NULL);
 505   result = cd_builtin (tlist);
 506   dispose_words (tlist);
 507   return (result);
 508 }
 509
 510 static int
 511 change_to_temp (temp)
 512      char *temp;
 513 {
 514   int tt;
 515
 516   tt = temp ? cd_to_string (temp) : EXECUTION_FAILURE;
 517
 518   if (tt == EXECUTION_SUCCESS)
 519     dirs_builtin ((WORD_LIST *)NULL);
 520
 521   return (tt);
 522 }
 523
 524 static void
 525 add_dirstack_element (dir)
 526      char *dir;
 527 {
 528   int j;
 529
 530   if (directory_list_offset == directory_list_size)
 531     {
 532       j = (directory_list_size += 10) * sizeof (char *);
 533       pushd_directory_list = (char **)xrealloc (pushd_directory_list, j);
 534     }
 535   pushd_directory_list[directory_list_offset++] = dir;
 536 }
 537
 538 static int
 539 get_dirstack_index (ind, sign, indexp)
 540      int ind, sign, *indexp;
 541 {
 542   if (indexp)
 543     *indexp = sign > 0 ? 1 : 2;
 544
 545   /* dirs +0 prints the current working directory. */
 546   /* dirs -0 prints last element in directory stack */
 547   if (ind == 0 && sign > 0)
 548     return 0;
 549   else if (ind == directory_list_offset)
 550     {
 551       if (indexp)
 552         *indexp = sign > 0 ? 2 : 1;
 553       return 0;
 554     }
 555   else
 556     return (sign > 0 ? directory_list_offset - ind : ind);
 557 }
 558
 559 /* Used by the tilde expansion code. */
 560 char *
 561 get_dirstack_from_string (string)
 562      char *string;
 563 {
 564   int ind, sign, index_flag;
 565   long i;
 566
 567   sign = 1;
 568   if (*string == '-' || *string == '+')
 569     {
 570       sign = (*string == '-') ? -1 : 1;
 571       string++;
 572     }
 573   if (legal_number (string, &i) == 0)
 574     return ((char *)NULL);
 575
 576   index_flag = 0;
 577   ind = get_dirstack_index (i, sign, &index_flag);
 578   if (index_flag && (ind < 0 || ind > directory_list_offset))
 579     return ((char *)NULL);
 580   if (index_flag == 0 || (index_flag == 1 && ind == 0))
 581     return (get_string_value ("PWD"));
 582   else
 583     return (pushd_directory_list[ind]);
 584 }
 585
 586 #ifdef INCLUDE_UNUSED
 587 char *
 588 get_dirstack_element (ind, sign)
 589      int ind, sign;
 590 {
 591   int i;
 592
 593   i = get_dirstack_index (ind, sign, (int *)NULL);
 594   return (i < 0 || i > directory_list_offset) ? (char *)NULL
 595                                               : pushd_directory_list[i];
 596 }
 597 #endif
 598
 599 void
 600 set_dirstack_element (ind, sign, value)
 601      int ind, sign;
 602      char *value;
 603 {
 604   int i;
 605
 606   i = get_dirstack_index (ind, sign, (int *)NULL);
 607   if (ind == 0 || i < 0 || i > directory_list_offset)
 608     return;
 609   free (pushd_directory_list[i]);
 610   pushd_directory_list[i] = savestring (value);
 611 }
 612
 613 WORD_LIST *
 614 get_directory_stack ()
 615 {
 616   register int i;
 617   WORD_LIST *ret;
 618   char *d, *t;
 619
 620   for (ret = (WORD_LIST *)NULL, i = 0; i < directory_list_offset; i++)
 621     {
 622       d = polite_directory_format (pushd_directory_list[i]);
 623       ret = make_word_list (make_word (d), ret);
 624     }
 625   /* Now the current directory. */
 626   d = get_working_directory ("dirstack");
 627   i = 0;        /* sentinel to decide whether or not to free d */
 628   if (d == 0)
 629     d = ".";
 630   else
 631     {
 632       t = polite_directory_format (d);
 633       /* polite_directory_format sometimes returns its argument unchanged.
 634          If it does not, we can free d right away.  If it does, we need to
 635          mark d to be deleted later. */
 636       if (t != d)
 637         {
 638           free (d);
 639           d = t;
 640         }
 641       else /* t == d, so d is what we want */
 642         i = 1;
 643     }
 644   ret = make_word_list (make_word (d), ret);
 645   if (i)
 646     free (d);
 647   return ret;   /* was (REVERSE_LIST (ret, (WORD_LIST *)); */
 648 }
 649
 650 #ifdef LOADABLE_BUILTIN
 651 static char *dirs_doc[] = {
 652   "Display the list of currently remembered directories.  Directories",
 653   "find their way onto the list with the `pushd' command; you can get",
 654   "back up through the list with the `popd' command.",
 655   "",
 656   "The -l flag specifies that `dirs' should not print shorthand versions",
 657   "of directories which are relative to your home directory.  This means",
 658   "that `~/bin' might be displayed as `/homes/bfox/bin'.  The -v flag",
 659   "causes `dirs' to print the directory stack with one entry per line,",
 660   "prepending the directory name with its position in the stack.  The -p",
 661   "flag does the same thing, but the stack position is not prepended.",
 662   "The -c flag clears the directory stack by deleting all of the elements.",
 663   "",
 664   "+N   displays the Nth entry counting from the left of the list shown by",
 665   "     dirs when invoked without options, starting with zero.",
 666   "",
 667   "-N   displays the Nth entry counting from the right of the list shown by",
 668   "     dirs when invoked without options, starting with zero.",
 669   (char *)NULL
 670 };
 671
 672 static char *pushd_doc[] = {
 673   "Adds a directory to the top of the directory stack, or rotates",
 674   "the stack, making the new top of the stack the current working",
 675   "directory.  With no arguments, exchanges the top two directories.",
 676   "",
 677   "+N   Rotates the stack so that the Nth directory (counting",
 678   "     from the left of the list shown by `dirs', starting with",
 679   "     zero) is at the top.",
 680   "",
 681   "-N   Rotates the stack so that the Nth directory (counting",
 682   "     from the right of the list shown by `dirs', starting with",
 683   "     zero) is at the top.",
 684   "",
 685   "-n   suppress the normal change of directory when adding directories",
 686   "     to the stack, so only the stack is manipulated.",
 687   "",
 688   "dir  adds DIR to the directory stack at the top, making it the",
 689   "     new current working directory.",
 690   "",
 691   "You can see the directory stack with the `dirs' command.",
 692   (char *)NULL
 693 };
 694
 695 static char *popd_doc[] = {
 696   "Removes entries from the directory stack.  With no arguments,",
 697   "removes the top directory from the stack, and cd's to the new",
 698   "top directory.",
 699   "",
 700   "+N   removes the Nth entry counting from the left of the list",
 701   "     shown by `dirs', starting with zero.  For example: `popd +0'",
 702   "     removes the first directory, `popd +1' the second.",
 703   "",
 704   "-N   removes the Nth entry counting from the right of the list",
 705   "     shown by `dirs', starting with zero.  For example: `popd -0'",
 706   "     removes the last directory, `popd -1' the next to last.",
 707   "",
 708   "-n   suppress the normal change of directory when removing directories",
 709   "     from the stack, so only the stack is manipulated.",
 710   "",
 711   "You can see the directory stack with the `dirs' command.",
 712   (char *)NULL
 713 };
 714
 715 struct builtin pushd_struct = {
 716         "pushd",
 717         pushd_builtin,
 718         BUILTIN_ENABLED,
 719         pushd_doc,
 720         "pushd [+N | -N] [-n] [dir]",
 721         0
 722 };
 723
 724 struct builtin popd_struct = {
 725         "popd",
 726         popd_builtin,
 727         BUILTIN_ENABLED,
 728         popd_doc,
 729         "popd [+N | -N] [-n]",
 730         0
 731 };
 732
 733 struct builtin dirs_struct = {
 734         "dirs",
 735         dirs_builtin,
 736         BUILTIN_ENABLED,
 737         dirs_doc,
 738         "dirs [-clpv] [+N] [-N]",
 739         0
 740 };
 741 #endif /* LOADABLE_BUILTIN */
 742
 743 #endif /* PUSHD_AND_POPD */