print_cmd.c

   1 /* print_command -- A way to make readable commands from a command tree. */
   2
   3 /* Copyright (C) 1989-2017 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    Bash is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24
  25 #if defined (HAVE_UNISTD_H)
  26 #  ifdef _MINIX
  27 #    include <sys/types.h>
  28 #  endif
  29 #  include <unistd.h>
  30 #endif
  31
  32 #if defined (PREFER_STDARG)
  33 #  include <stdarg.h>
  34 #else
  35 #  include <varargs.h>
  36 #endif
  37
  38 #include "bashansi.h"
  39 #include "bashintl.h"
  40
  41 #define NEED_XTRACE_SET_DECL
  42
  43 #include "shell.h"
  44 #include "flags.h"
  45 #include <y.tab.h>      /* use <...> so we pick it up from the build directory */
  46 #include "input.h"
  47
  48 #include "shmbutil.h"
  49
  50 #include "builtins/common.h"
  51
  52 #if !HAVE_DECL_PRINTF
  53 extern int printf __P((const char *, ...));     /* Yuck.  Double yuck. */
  54 #endif
  55
  56 static int indentation;
  57 static int indentation_amount = 4;
  58
  59 #if defined (PREFER_STDARG)
  60 typedef void PFUNC __P((const char *, ...));
  61
  62 static void cprintf __P((const char *, ...))  __attribute__((__format__ (printf, 1, 2)));
  63 static void xprintf __P((const char *, ...))  __attribute__((__format__ (printf, 1, 2)));
  64 #else
  65 #define PFUNC VFunction
  66 static void cprintf ();
  67 static void xprintf ();
  68 #endif
  69
  70 static void reset_locals __P((void));
  71 static void newline __P((char *));
  72 static void indent __P((int));
  73 static void semicolon __P((void));
  74 static void the_printed_command_resize __P((int));
  75
  76 static void make_command_string_internal __P((COMMAND *));
  77 static void _print_word_list __P((WORD_LIST *, char *, PFUNC *));
  78 static void command_print_word_list __P((WORD_LIST *, char *));
  79 static void print_case_clauses __P((PATTERN_LIST *));
  80 static void print_redirection_list __P((REDIRECT *));
  81 static void print_redirection __P((REDIRECT *));
  82 static void print_heredoc_header __P((REDIRECT *));
  83 static void print_heredoc_body __P((REDIRECT *));
  84 static void print_heredocs __P((REDIRECT *));
  85 static void print_heredoc_bodies __P((REDIRECT *));
  86 static void print_deferred_heredocs __P((const char *));
  87
  88 static void print_for_command __P((FOR_COM *));
  89 #if defined (ARITH_FOR_COMMAND)
  90 static void print_arith_for_command __P((ARITH_FOR_COM *));
  91 #endif
  92 #if defined (SELECT_COMMAND)
  93 static void print_select_command __P((SELECT_COM *));
  94 #endif
  95 static void print_group_command __P((GROUP_COM *));
  96 static void print_case_command __P((CASE_COM *));
  97 static void print_while_command __P((WHILE_COM *));
  98 static void print_until_command __P((WHILE_COM *));
  99 static void print_until_or_while __P((WHILE_COM *, char *));
 100 static void print_if_command __P((IF_COM *));
 101 #if defined (COND_COMMAND)
 102 static void print_cond_node __P((COND_COM *));
 103 #endif
 104 static void print_function_def __P((FUNCTION_DEF *));
 105
 106 #define PRINTED_COMMAND_INITIAL_SIZE 64
 107 #define PRINTED_COMMAND_GROW_SIZE 128
 108
 109 char *the_printed_command = (char *)NULL;
 110 int the_printed_command_size = 0;
 111 int command_string_index = 0;
 112
 113 int xtrace_fd = -1;
 114 FILE *xtrace_fp = 0;
 115
 116 #define CHECK_XTRACE_FP xtrace_fp = (xtrace_fp ? xtrace_fp : stderr)
 117
 118 /* shell expansion characters: used in print_redirection_list */
 119 #define EXPCHAR(c) ((c) == '{' || (c) == '~' || (c) == '$' || (c) == '`')
 120
 121 #define PRINT_DEFERRED_HEREDOCS(x) \
 122   do { \
 123     if (deferred_heredocs) \
 124       print_deferred_heredocs (x); \
 125   } while (0)
 126
 127 /* Non-zero means the stuff being printed is inside of a function def. */
 128 static int inside_function_def;
 129 static int skip_this_indent;
 130 static int was_heredoc;
 131 static int printing_connection;
 132 static REDIRECT *deferred_heredocs;
 133
 134 /* The depth of the group commands that we are currently printing.  This
 135    includes the group command that is a function body. */
 136 static int group_command_nesting;
 137
 138 /* A buffer to indicate the indirection level (PS4) when set -x is enabled. */
 139 static char *indirection_string = 0;
 140 static int indirection_stringsiz = 0;
 141
 142 /* Print COMMAND (a command tree) on standard output. */
 143 void
 144 print_command (command)
 145      COMMAND *command;
 146 {
 147   command_string_index = 0;
 148   printf ("%s", make_command_string (command));
 149 }
 150
 151 /* Make a string which is the printed representation of the command
 152    tree in COMMAND.  We return this string.  However, the string is
 153    not consed, so you have to do that yourself if you want it to
 154    remain around. */
 155 char *
 156 make_command_string (command)
 157      COMMAND *command;
 158 {
 159   command_string_index = was_heredoc = 0;
 160   deferred_heredocs = 0;
 161   make_command_string_internal (command);
 162   return (the_printed_command);
 163 }
 164
 165 /* The internal function.  This is the real workhorse. */
 166 static void
 167 make_command_string_internal (command)
 168      COMMAND *command;
 169 {
 170   char s[3];
 171
 172   if (command == 0)
 173     cprintf ("");
 174   else
 175     {
 176       if (skip_this_indent)
 177         skip_this_indent--;
 178       else
 179         indent (indentation);
 180
 181       if (command->flags & CMD_TIME_PIPELINE)
 182         {
 183           cprintf ("time ");
 184           if (command->flags & CMD_TIME_POSIX)
 185             cprintf ("-p ");
 186         }
 187
 188       if (command->flags & CMD_INVERT_RETURN)
 189         cprintf ("! ");
 190
 191       switch (command->type)
 192         {
 193         case cm_for:
 194           print_for_command (command->value.For);
 195           break;
 196
 197 #if defined (ARITH_FOR_COMMAND)
 198         case cm_arith_for:
 199           print_arith_for_command (command->value.ArithFor);
 200           break;
 201 #endif
 202
 203 #if defined (SELECT_COMMAND)
 204         case cm_select:
 205           print_select_command (command->value.Select);
 206           break;
 207 #endif
 208
 209         case cm_case:
 210           print_case_command (command->value.Case);
 211           break;
 212
 213         case cm_while:
 214           print_while_command (command->value.While);
 215           break;
 216
 217         case cm_until:
 218           print_until_command (command->value.While);
 219           break;
 220
 221         case cm_if:
 222           print_if_command (command->value.If);
 223           break;
 224
 225 #if defined (DPAREN_ARITHMETIC)
 226         case cm_arith:
 227           print_arith_command (command->value.Arith->exp);
 228           break;
 229 #endif
 230
 231 #if defined (COND_COMMAND)
 232         case cm_cond:
 233           print_cond_command (command->value.Cond);
 234           break;
 235 #endif
 236
 237         case cm_simple:
 238           print_simple_command (command->value.Simple);
 239           break;
 240
 241         case cm_connection:
 242
 243           skip_this_indent++;
 244           printing_connection++;
 245           make_command_string_internal (command->value.Connection->first);
 246
 247           switch (command->value.Connection->connector)
 248             {
 249             case '&':
 250             case '|':
 251               {
 252                 char c = command->value.Connection->connector;
 253
 254                 s[0] = ' ';
 255                 s[1] = c;
 256                 s[2] = '\0';
 257
 258                 print_deferred_heredocs (s);
 259
 260                 if (c != '&' || command->value.Connection->second)
 261                   {
 262                     cprintf (" ");
 263                     skip_this_indent++;
 264                   }
 265               }
 266               break;
 267
 268             case AND_AND:
 269               print_deferred_heredocs (" && ");
 270               if (command->value.Connection->second)
 271                 skip_this_indent++;
 272               break;
 273
 274             case OR_OR:
 275               print_deferred_heredocs (" || ");
 276               if (command->value.Connection->second)
 277                 skip_this_indent++;
 278               break;
 279
 280             case ';':
 281               if (deferred_heredocs == 0)
 282                 {
 283                   if (was_heredoc == 0)
 284                     cprintf (";");
 285                   else
 286                     was_heredoc = 0;
 287                 }
 288               else
 289                 print_deferred_heredocs (inside_function_def ? "" : ";");
 290
 291               if (inside_function_def)
 292                 cprintf ("\n");
 293               else
 294                 {
 295                   cprintf (" ");
 296                   if (command->value.Connection->second)
 297                     skip_this_indent++;
 298                 }
 299               break;
 300
 301             default:
 302               cprintf (_("print_command: bad connector `%d'"),
 303                        command->value.Connection->connector);
 304               break;
 305             }
 306
 307           make_command_string_internal (command->value.Connection->second);
 308           PRINT_DEFERRED_HEREDOCS ("");
 309           printing_connection--;
 310           break;
 311
 312         case cm_function_def:
 313           print_function_def (command->value.Function_def);
 314           break;
 315
 316         case cm_group:
 317           print_group_command (command->value.Group);
 318           break;
 319
 320         case cm_subshell:
 321           cprintf ("( ");
 322           skip_this_indent++;
 323           make_command_string_internal (command->value.Subshell->command);
 324           PRINT_DEFERRED_HEREDOCS ("");
 325           cprintf (" )");
 326           break;
 327
 328         case cm_coproc:
 329           cprintf ("coproc %s ", command->value.Coproc->name);
 330           skip_this_indent++;
 331           make_command_string_internal (command->value.Coproc->command);
 332           break;
 333
 334         default:
 335           command_error ("print_command", CMDERR_BADTYPE, command->type, 0);
 336           break;
 337         }
 338
 339
 340       if (command->redirects)
 341         {
 342           cprintf (" ");
 343           print_redirection_list (command->redirects);
 344         }
 345     }
 346 }
 347
 348 static void
 349 _print_word_list (list, separator, pfunc)
 350      WORD_LIST *list;
 351      char *separator;
 352      PFUNC *pfunc;
 353 {
 354   WORD_LIST *w;
 355
 356   for (w = list; w; w = w->next)
 357     (*pfunc) ("%s%s", w->word->word, w->next ? separator : "");
 358 }
 359
 360 void
 361 print_word_list (list, separator)
 362      WORD_LIST *list;
 363      char *separator;
 364 {
 365   _print_word_list (list, separator, xprintf);
 366 }
 367
 368 void
 369 xtrace_set (fd, fp)
 370      int fd;
 371      FILE *fp;
 372 {
 373   if (fd >= 0 && sh_validfd (fd) == 0)
 374     {
 375       internal_error (_("xtrace_set: %d: invalid file descriptor"), fd);
 376       return;
 377     }
 378   if (fp == 0)
 379     {
 380       internal_error (_("xtrace_set: NULL file pointer"));
 381       return;
 382     }
 383   if (fd >= 0 && fileno (fp) != fd)
 384     internal_warning (_("xtrace fd (%d) != fileno xtrace fp (%d)"), fd, fileno (fp));
 385
 386   xtrace_fd = fd;
 387   xtrace_fp = fp;
 388 }
 389
 390 void
 391 xtrace_init ()
 392 {
 393   xtrace_set (-1, stderr);
 394 }
 395
 396 void
 397 xtrace_reset ()
 398 {
 399   if (xtrace_fd >= 0 && xtrace_fp)
 400     {
 401       fflush (xtrace_fp);
 402       fclose (xtrace_fp);
 403     }
 404   else if (xtrace_fd >= 0)
 405     close (xtrace_fd);
 406
 407   xtrace_fd = -1;
 408   xtrace_fp = stderr;
 409 }
 410
 411 void
 412 xtrace_fdchk (fd)
 413      int fd;
 414 {
 415   if (fd == xtrace_fd)
 416     xtrace_reset ();
 417 }
 418
 419 /* Return a string denoting what our indirection level is. */
 420
 421 char *
 422 indirection_level_string ()
 423 {
 424   register int i, j;
 425   char *ps4;
 426   char ps4_firstc[MB_LEN_MAX+1];
 427   int ps4_firstc_len, ps4_len, ineed, old;
 428
 429   ps4 = get_string_value ("PS4");
 430   if (indirection_string == 0)
 431     indirection_string = xmalloc (indirection_stringsiz = 100);
 432   indirection_string[0] = '\0';
 433
 434   if (ps4 == 0 || *ps4 == '\0')
 435     return (indirection_string);
 436
 437   old = change_flag ('x', FLAG_OFF);
 438   ps4 = decode_prompt_string (ps4);
 439   if (old)
 440     change_flag ('x', FLAG_ON);
 441
 442   if (ps4 == 0 || *ps4 == '\0')
 443     return (indirection_string);
 444
 445 #if defined (HANDLE_MULTIBYTE)
 446   ps4_len = strnlen (ps4, MB_CUR_MAX);
 447   ps4_firstc_len = MBLEN (ps4, ps4_len);
 448   if (ps4_firstc_len == 1 || ps4_firstc_len == 0 || ps4_firstc_len < 0)
 449     {
 450       ps4_firstc[0] = ps4[0];
 451       ps4_firstc[ps4_firstc_len = 1] = '\0';
 452     }
 453   else
 454     memcpy (ps4_firstc, ps4, ps4_firstc_len);
 455 #else
 456   ps4_firstc[0] = ps4[0];
 457   ps4_firstc[ps4_firstc_len = 1] = '\0';
 458 #endif
 459
 460   /* Dynamically resize indirection_string so we have room for everything
 461      and we don't have to truncate ps4 */
 462   ineed = (ps4_firstc_len * indirection_level) + strlen (ps4);
 463   if (ineed > indirection_stringsiz - 1)
 464     {
 465       indirection_stringsiz = ineed + 1;
 466       indirection_string = xrealloc (indirection_string, indirection_stringsiz);
 467     }
 468
 469   for (i = j = 0; ps4_firstc[0] && j < indirection_level && i < indirection_stringsiz - 1; i += ps4_firstc_len, j++)
 470     {
 471       if (ps4_firstc_len == 1)
 472         indirection_string[i] = ps4_firstc[0];
 473       else
 474         memcpy (indirection_string+i, ps4_firstc, ps4_firstc_len);
 475     }
 476
 477   for (j = ps4_firstc_len; *ps4 && ps4[j] && i < indirection_stringsiz - 1; i++, j++)
 478     indirection_string[i] = ps4[j];
 479
 480   indirection_string[i] = '\0';
 481   free (ps4);
 482   return (indirection_string);
 483 }
 484
 485 void
 486 xtrace_print_assignment (name, value, assign_list, xflags)
 487      char *name, *value;
 488      int assign_list, xflags;
 489 {
 490   char *nval;
 491
 492   CHECK_XTRACE_FP;
 493
 494   if (xflags)
 495     fprintf (xtrace_fp, "%s", indirection_level_string ());
 496
 497   /* VALUE should not be NULL when this is called. */
 498   if (*value == '\0' || assign_list)
 499     nval = value;
 500   else if (sh_contains_shell_metas (value))
 501     nval = sh_single_quote (value);
 502   else if (ansic_shouldquote (value))
 503     nval = ansic_quote (value, 0, (int *)0);
 504   else
 505     nval = value;
 506
 507   if (assign_list)
 508     fprintf (xtrace_fp, "%s=(%s)\n", name, nval);
 509   else
 510     fprintf (xtrace_fp, "%s=%s\n", name, nval);
 511
 512   if (nval != value)
 513     FREE (nval);
 514
 515   fflush (xtrace_fp);
 516 }
 517
 518 /* A function to print the words of a simple command when set -x is on.  Also used to
 519    print the word list in a for or select command header; in that case, we suppress
 520    quoting the words because they haven't been expanded yet.  XTFLAGS&1 means to
 521    print $PS4; XTFLAGS&2 means to suppress quoting the words in LIST. */
 522 void
 523 xtrace_print_word_list (list, xtflags)
 524      WORD_LIST *list;
 525      int xtflags;
 526 {
 527   WORD_LIST *w;
 528   char *t, *x;
 529
 530   CHECK_XTRACE_FP;
 531
 532   if (xtflags&1)
 533     fprintf (xtrace_fp, "%s", indirection_level_string ());
 534
 535   for (w = list; w; w = w->next)
 536     {
 537       t = w->word->word;
 538       if (t == 0 || *t == '\0')
 539         fprintf (xtrace_fp, "''%s", w->next ? " " : "");
 540       else if (xtflags & 2)
 541         fprintf (xtrace_fp, "%s%s", t, w->next ? " " : "");
 542       else if (sh_contains_shell_metas (t))
 543         {
 544           x = sh_single_quote (t);
 545           fprintf (xtrace_fp, "%s%s", x, w->next ? " " : "");
 546           free (x);
 547         }
 548       else if (ansic_shouldquote (t))
 549         {
 550           x = ansic_quote (t, 0, (int *)0);
 551           fprintf (xtrace_fp, "%s%s", x, w->next ? " " : "");
 552           free (x);
 553         }
 554       else
 555         fprintf (xtrace_fp, "%s%s", t, w->next ? " " : "");
 556     }
 557   fprintf (xtrace_fp, "\n");
 558   fflush (xtrace_fp);
 559 }
 560
 561 static void
 562 command_print_word_list (list, separator)
 563      WORD_LIST *list;
 564      char *separator;
 565 {
 566   _print_word_list (list, separator, cprintf);
 567 }
 568
 569 void
 570 print_for_command_head (for_command)
 571      FOR_COM *for_command;
 572 {
 573   cprintf ("for %s in ", for_command->name->word);
 574   command_print_word_list (for_command->map_list, " ");
 575 }
 576
 577 void
 578 xtrace_print_for_command_head (for_command)
 579      FOR_COM *for_command;
 580 {
 581   CHECK_XTRACE_FP;
 582   fprintf (xtrace_fp, "%s", indirection_level_string ());
 583   fprintf (xtrace_fp, "for %s in ", for_command->name->word);
 584   xtrace_print_word_list (for_command->map_list, 2);
 585 }
 586
 587 static void
 588 print_for_command (for_command)
 589      FOR_COM *for_command;
 590 {
 591   print_for_command_head (for_command);
 592   cprintf (";");
 593   newline ("do\n");
 594
 595   indentation += indentation_amount;
 596   make_command_string_internal (for_command->action);
 597   PRINT_DEFERRED_HEREDOCS ("");
 598   semicolon ();
 599   indentation -= indentation_amount;
 600
 601   newline ("done");
 602 }
 603
 604 #if defined (ARITH_FOR_COMMAND)
 605 static void
 606 print_arith_for_command (arith_for_command)
 607      ARITH_FOR_COM *arith_for_command;
 608 {
 609   cprintf ("for ((");
 610   command_print_word_list (arith_for_command->init, " ");
 611   cprintf ("; ");
 612   command_print_word_list (arith_for_command->test, " ");
 613   cprintf ("; ");
 614   command_print_word_list (arith_for_command->step, " ");
 615   cprintf ("))");
 616   newline ("do\n");
 617   indentation += indentation_amount;
 618   make_command_string_internal (arith_for_command->action);
 619   PRINT_DEFERRED_HEREDOCS ("");
 620   semicolon ();
 621   indentation -= indentation_amount;
 622   newline ("done");
 623 }
 624 #endif /* ARITH_FOR_COMMAND */
 625
 626 #if defined (SELECT_COMMAND)
 627 void
 628 print_select_command_head (select_command)
 629      SELECT_COM *select_command;
 630 {
 631   cprintf ("select %s in ", select_command->name->word);
 632   command_print_word_list (select_command->map_list, " ");
 633 }
 634
 635 void
 636 xtrace_print_select_command_head (select_command)
 637      SELECT_COM *select_command;
 638 {
 639   CHECK_XTRACE_FP;
 640   fprintf (xtrace_fp, "%s", indirection_level_string ());
 641   fprintf (xtrace_fp, "select %s in ", select_command->name->word);
 642   xtrace_print_word_list (select_command->map_list, 2);
 643 }
 644
 645 static void
 646 print_select_command (select_command)
 647      SELECT_COM *select_command;
 648 {
 649   print_select_command_head (select_command);
 650
 651   cprintf (";");
 652   newline ("do\n");
 653   indentation += indentation_amount;
 654   make_command_string_internal (select_command->action);
 655   PRINT_DEFERRED_HEREDOCS ("");
 656   semicolon ();
 657   indentation -= indentation_amount;
 658   newline ("done");
 659 }
 660 #endif /* SELECT_COMMAND */
 661
 662 static void
 663 print_group_command (group_command)
 664      GROUP_COM *group_command;
 665 {
 666   group_command_nesting++;
 667   cprintf ("{ ");
 668
 669   if (inside_function_def == 0)
 670     skip_this_indent++;
 671   else
 672     {
 673       /* This is a group command { ... } inside of a function
 674          definition, and should be printed as a multiline group
 675          command, using the current indentation. */
 676       cprintf ("\n");
 677       indentation += indentation_amount;
 678     }
 679
 680   make_command_string_internal (group_command->command);
 681   PRINT_DEFERRED_HEREDOCS ("");
 682
 683   if (inside_function_def)
 684     {
 685       cprintf ("\n");
 686       indentation -= indentation_amount;
 687       indent (indentation);
 688     }
 689   else
 690     {
 691       semicolon ();
 692       cprintf (" ");
 693     }
 694
 695   cprintf ("}");
 696
 697   group_command_nesting--;
 698 }
 699
 700 void
 701 print_case_command_head (case_command)
 702      CASE_COM *case_command;
 703 {
 704   cprintf ("case %s in ", case_command->word->word);
 705 }
 706
 707 void
 708 xtrace_print_case_command_head (case_command)
 709      CASE_COM *case_command;
 710 {
 711   CHECK_XTRACE_FP;
 712   fprintf (xtrace_fp, "%s", indirection_level_string ());
 713   fprintf (xtrace_fp, "case %s in\n", case_command->word->word);
 714 }
 715
 716 static void
 717 print_case_command (case_command)
 718      CASE_COM *case_command;
 719 {
 720   print_case_command_head (case_command);
 721
 722   if (case_command->clauses)
 723     print_case_clauses (case_command->clauses);
 724   newline ("esac");
 725 }
 726
 727 static void
 728 print_case_clauses (clauses)
 729      PATTERN_LIST *clauses;
 730 {
 731   indentation += indentation_amount;
 732   while (clauses)
 733     {
 734       newline ("");
 735       command_print_word_list (clauses->patterns, " | ");
 736       cprintf (")\n");
 737       indentation += indentation_amount;
 738       make_command_string_internal (clauses->action);
 739       indentation -= indentation_amount;
 740       PRINT_DEFERRED_HEREDOCS ("");
 741       if (clauses->flags & CASEPAT_FALLTHROUGH)
 742         newline (";&");
 743       else if (clauses->flags & CASEPAT_TESTNEXT)
 744         newline (";;&");
 745       else
 746         newline (";;");
 747       clauses = clauses->next;
 748     }
 749   indentation -= indentation_amount;
 750 }
 751
 752 static void
 753 print_while_command (while_command)
 754      WHILE_COM *while_command;
 755 {
 756   print_until_or_while (while_command, "while");
 757 }
 758
 759 static void
 760 print_until_command (while_command)
 761      WHILE_COM *while_command;
 762 {
 763   print_until_or_while (while_command, "until");
 764 }
 765
 766 static void
 767 print_until_or_while (while_command, which)
 768      WHILE_COM *while_command;
 769      char *which;
 770 {
 771   cprintf ("%s ", which);
 772   skip_this_indent++;
 773   make_command_string_internal (while_command->test);
 774   PRINT_DEFERRED_HEREDOCS ("");
 775   semicolon ();
 776   cprintf (" do\n");    /* was newline ("do\n"); */
 777   indentation += indentation_amount;
 778   make_command_string_internal (while_command->action);
 779   PRINT_DEFERRED_HEREDOCS ("");
 780   indentation -= indentation_amount;
 781   semicolon ();
 782   newline ("done");
 783 }
 784
 785 static void
 786 print_if_command (if_command)
 787      IF_COM *if_command;
 788 {
 789   cprintf ("if ");
 790   skip_this_indent++;
 791   make_command_string_internal (if_command->test);
 792   semicolon ();
 793   cprintf (" then\n");
 794   indentation += indentation_amount;
 795   make_command_string_internal (if_command->true_case);
 796   PRINT_DEFERRED_HEREDOCS ("");
 797   indentation -= indentation_amount;
 798
 799   if (if_command->false_case)
 800     {
 801       semicolon ();
 802       newline ("else\n");
 803       indentation += indentation_amount;
 804       make_command_string_internal (if_command->false_case);
 805       PRINT_DEFERRED_HEREDOCS ("");
 806       indentation -= indentation_amount;
 807     }
 808   semicolon ();
 809   newline ("fi");
 810 }
 811
 812 #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
 813 void
 814 print_arith_command (arith_cmd_list)
 815      WORD_LIST *arith_cmd_list;
 816 {
 817   cprintf ("((");
 818   command_print_word_list (arith_cmd_list, " ");
 819   cprintf ("))");
 820 }
 821 #endif
 822
 823 #if defined (COND_COMMAND)
 824 static void
 825 print_cond_node (cond)
 826      COND_COM *cond;
 827 {
 828   if (cond->flags & CMD_INVERT_RETURN)
 829     cprintf ("! ");
 830
 831   if (cond->type == COND_EXPR)
 832     {
 833       cprintf ("( ");
 834       print_cond_node (cond->left);
 835       cprintf (" )");
 836     }
 837   else if (cond->type == COND_AND)
 838     {
 839       print_cond_node (cond->left);
 840       cprintf (" && ");
 841       print_cond_node (cond->right);
 842     }
 843   else if (cond->type == COND_OR)
 844     {
 845       print_cond_node (cond->left);
 846       cprintf (" || ");
 847       print_cond_node (cond->right);
 848     }
 849   else if (cond->type == COND_UNARY)
 850     {
 851       cprintf ("%s", cond->op->word);
 852       cprintf (" ");
 853       print_cond_node (cond->left);
 854     }
 855   else if (cond->type == COND_BINARY)
 856     {
 857       print_cond_node (cond->left);
 858       cprintf (" ");
 859       cprintf ("%s", cond->op->word);
 860       cprintf (" ");
 861       print_cond_node (cond->right);
 862     }
 863   else if (cond->type == COND_TERM)
 864     {
 865       cprintf ("%s", cond->op->word);           /* need to add quoting here */
 866     }
 867 }
 868
 869 void
 870 print_cond_command (cond)
 871      COND_COM *cond;
 872 {
 873   cprintf ("[[ ");
 874   print_cond_node (cond);
 875   cprintf (" ]]");
 876 }
 877
 878 #ifdef DEBUG
 879 void
 880 debug_print_word_list (s, list, sep)
 881      char *s;
 882      WORD_LIST *list;
 883      char *sep;
 884 {
 885   WORD_LIST *w;
 886
 887   if (s)
 888     fprintf (stderr, "%s: ", s);
 889   for (w = list; w; w = w->next)
 890     fprintf (stderr, "%s%s", w->word->word, w->next ? sep : "");
 891   fprintf (stderr, "\n");
 892 }
 893
 894 void
 895 debug_print_cond_command (cond)
 896      COND_COM *cond;
 897 {
 898   fprintf (stderr, "DEBUG: ");
 899   command_string_index = 0;
 900   print_cond_command (cond);
 901   fprintf (stderr, "%s\n", the_printed_command);
 902 }
 903 #endif
 904
 905 void
 906 xtrace_print_cond_term (type, invert, op, arg1, arg2)
 907      int type, invert;
 908      WORD_DESC *op;
 909      char *arg1, *arg2;
 910 {
 911   CHECK_XTRACE_FP;
 912   command_string_index = 0;
 913   fprintf (xtrace_fp, "%s", indirection_level_string ());
 914   fprintf (xtrace_fp, "[[ ");
 915   if (invert)
 916     fprintf (xtrace_fp, "! ");
 917
 918   if (type == COND_UNARY)
 919     {
 920       fprintf (xtrace_fp, "%s ", op->word);
 921       fprintf (xtrace_fp, "%s", (arg1 && *arg1) ? arg1 : "''");
 922     }
 923   else if (type == COND_BINARY)
 924     {
 925       fprintf (xtrace_fp, "%s", (arg1 && *arg1) ? arg1 : "''");
 926       fprintf (xtrace_fp, " %s ", op->word);
 927       fprintf (xtrace_fp, "%s", (arg2 && *arg2) ? arg2 : "''");
 928     }
 929
 930   fprintf (xtrace_fp, " ]]\n");
 931
 932   fflush (xtrace_fp);
 933 }
 934 #endif /* COND_COMMAND */
 935
 936 #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
 937 /* A function to print the words of an arithmetic command when set -x is on. */
 938 void
 939 xtrace_print_arith_cmd (list)
 940      WORD_LIST *list;
 941 {
 942   WORD_LIST *w;
 943
 944   CHECK_XTRACE_FP;
 945   fprintf (xtrace_fp, "%s", indirection_level_string ());
 946   fprintf (xtrace_fp, "(( ");
 947   for (w = list; w; w = w->next)
 948     fprintf (xtrace_fp, "%s%s", w->word->word, w->next ? " " : "");
 949   fprintf (xtrace_fp, " ))\n");
 950
 951   fflush (xtrace_fp);
 952 }
 953 #endif
 954
 955 void
 956 print_simple_command (simple_command)
 957      SIMPLE_COM *simple_command;
 958 {
 959   command_print_word_list (simple_command->words, " ");
 960
 961   if (simple_command->redirects)
 962     {
 963       cprintf (" ");
 964       print_redirection_list (simple_command->redirects);
 965     }
 966 }
 967
 968 static void
 969 print_heredocs (heredocs)
 970      REDIRECT *heredocs;
 971 {
 972   REDIRECT *hdtail;
 973
 974   cprintf (" ");
 975   for (hdtail = heredocs; hdtail; hdtail = hdtail->next)
 976     {
 977       print_redirection (hdtail);
 978       cprintf ("\n");
 979     }
 980   was_heredoc = 1;
 981 }
 982
 983 static void
 984 print_heredoc_bodies (heredocs)
 985      REDIRECT *heredocs;
 986 {
 987   REDIRECT *hdtail;
 988
 989   cprintf ("\n");
 990   for (hdtail = heredocs; hdtail; hdtail = hdtail->next)
 991     {
 992       print_heredoc_body (hdtail);
 993       cprintf ("\n");
 994     }
 995   was_heredoc = 1;
 996 }
 997
 998 /* Print heredocs that are attached to the command before the connector
 999    represented by CSTRING.  The parsing semantics require us to print the
1000    here-doc delimiters, then the connector (CSTRING), then the here-doc
1001    bodies.  We print the here-doc delimiters in print_redirection_list
1002    and print the connector and the bodies here. We don't print the connector
1003    if it's a `;', but we use it to note not to print an extra space after the
1004    last heredoc body and newline. */
1005 static void
1006 print_deferred_heredocs (cstring)
1007      const char *cstring;
1008 {
1009   /* We now print the heredoc headers in print_redirection_list */
1010   if (cstring && cstring[0] && (cstring[0] != ';' || cstring[1]))
1011     cprintf ("%s", cstring);
1012   if (deferred_heredocs)
1013     {
1014       print_heredoc_bodies (deferred_heredocs);
1015       if (cstring && cstring[0] && (cstring[0] != ';' || cstring[1]))
1016         cprintf (" ");  /* make sure there's at least one space */
1017       dispose_redirects (deferred_heredocs);
1018       was_heredoc = 1;
1019     }
1020   deferred_heredocs = (REDIRECT *)NULL;
1021 }
1022
1023 static void
1024 print_redirection_list (redirects)
1025      REDIRECT *redirects;
1026 {
1027   REDIRECT *heredocs, *hdtail, *newredir;
1028   char *rw;
1029
1030   heredocs = (REDIRECT *)NULL;
1031   hdtail = heredocs;
1032
1033   was_heredoc = 0;
1034   while (redirects)
1035     {
1036       /* Defer printing the here document bodiess until we've printed the rest of the
1037          redirections, but print the headers in the order they're given.  */
1038       if (redirects->instruction == r_reading_until || redirects->instruction == r_deblank_reading_until)
1039         {
1040           newredir = copy_redirect (redirects);
1041           newredir->next = (REDIRECT *)NULL;
1042
1043           print_heredoc_header (newredir);
1044
1045           if (heredocs)
1046             {
1047               hdtail->next = newredir;
1048               hdtail = newredir;
1049             }
1050           else
1051             hdtail = heredocs = newredir;
1052         }
1053       else if (redirects->instruction == r_duplicating_output_word && (redirects->flags & REDIR_VARASSIGN) == 0 && redirects->redirector.dest == 1)
1054         {
1055           /* Temporarily translate it as the execution code does. */
1056           rw = redirects->redirectee.filename->word;
1057           if (rw && *rw != '-' && DIGIT (*rw) == 0 && EXPCHAR (*rw) == 0)
1058             redirects->instruction = r_err_and_out;
1059           print_redirection (redirects);
1060           redirects->instruction = r_duplicating_output_word;
1061         }
1062       else
1063         print_redirection (redirects);
1064
1065       redirects = redirects->next;
1066       if (redirects)
1067         cprintf (" ");
1068     }
1069
1070   /* Now that we've printed all the other redirections (on one line),
1071      print the here documents.  If we're printing a connection, we wait until
1072      we print the connector symbol, then we print the here document bodies */
1073   if (heredocs && printing_connection)
1074     deferred_heredocs = heredocs;
1075   else if (heredocs)
1076     {
1077       print_heredoc_bodies (heredocs);
1078       dispose_redirects (heredocs);
1079     }
1080 }
1081
1082 static void
1083 print_heredoc_header (redirect)
1084      REDIRECT *redirect;
1085 {
1086   int kill_leading;
1087   char *x;
1088
1089   kill_leading = redirect->instruction == r_deblank_reading_until;
1090
1091   /* Here doc header */
1092   if (redirect->rflags & REDIR_VARASSIGN)
1093     cprintf ("{%s}", redirect->redirector.filename->word);
1094   else if (redirect->redirector.dest != 0)
1095     cprintf ("%d", redirect->redirector.dest);
1096
1097   /* If the here document delimiter is quoted, single-quote it. */
1098   if (redirect->redirectee.filename->flags & W_QUOTED)
1099     {
1100       x = sh_single_quote (redirect->here_doc_eof);
1101       cprintf ("<<%s%s", kill_leading ? "-" : "", x);
1102       free (x);
1103     }
1104   else
1105     cprintf ("<<%s%s", kill_leading ? "-" : "", redirect->here_doc_eof);
1106 }
1107
1108 static void
1109 print_heredoc_body (redirect)
1110      REDIRECT *redirect;
1111 {
1112   /* Here doc body */
1113   cprintf ("%s%s", redirect->redirectee.filename->word, redirect->here_doc_eof);
1114 }
1115
1116 static void
1117 print_redirection (redirect)
1118      REDIRECT *redirect;
1119 {
1120   int redirector, redir_fd;
1121   WORD_DESC *redirectee, *redir_word;
1122
1123   redirectee = redirect->redirectee.filename;
1124   redir_fd = redirect->redirectee.dest;
1125
1126   redir_word = redirect->redirector.filename;
1127   redirector = redirect->redirector.dest;
1128
1129   switch (redirect->instruction)
1130     {
1131     case r_input_direction:
1132       if (redirect->rflags & REDIR_VARASSIGN)
1133         cprintf ("{%s}", redir_word->word);
1134       else if (redirector != 0)
1135         cprintf ("%d", redirector);
1136       cprintf ("< %s", redirectee->word);
1137       break;
1138
1139     case r_output_direction:
1140       if (redirect->rflags & REDIR_VARASSIGN)
1141         cprintf ("{%s}", redir_word->word);
1142       else if (redirector != 1)
1143         cprintf ("%d", redirector);
1144       cprintf ("> %s", redirectee->word);
1145       break;
1146
1147     case r_inputa_direction:    /* Redirection created by the shell. */
1148       cprintf ("&");
1149       break;
1150
1151     case r_output_force:
1152       if (redirect->rflags & REDIR_VARASSIGN)
1153         cprintf ("{%s}", redir_word->word);
1154       else if (redirector != 1)
1155         cprintf ("%d", redirector);
1156       cprintf (">| %s", redirectee->word);
1157       break;
1158
1159     case r_appending_to:
1160       if (redirect->rflags & REDIR_VARASSIGN)
1161         cprintf ("{%s}", redir_word->word);
1162       else if (redirector != 1)
1163         cprintf ("%d", redirector);
1164       cprintf (">> %s", redirectee->word);
1165       break;
1166
1167     case r_input_output:
1168       if (redirect->rflags & REDIR_VARASSIGN)
1169         cprintf ("{%s}", redir_word->word);
1170       else if (redirector != 1)
1171         cprintf ("%d", redirector);
1172       cprintf ("<> %s", redirectee->word);
1173       break;
1174
1175     case r_deblank_reading_until:
1176     case r_reading_until:
1177       print_heredoc_header (redirect);
1178       cprintf ("\n");
1179       print_heredoc_body (redirect);
1180       break;
1181
1182     case r_reading_string:
1183       if (redirect->rflags & REDIR_VARASSIGN)
1184         cprintf ("{%s}", redir_word->word);
1185       else if (redirector != 0)
1186         cprintf ("%d", redirector);
1187 #if 0
1188       /* Don't need to check whether or not to requote, since original quotes
1189          are still intact.  The only thing that has happened is that $'...'
1190          has been replaced with 'expanded ...'. */
1191       if (ansic_shouldquote (redirect->redirectee.filename->word))
1192         {
1193           char *x;
1194           x = ansic_quote (redirect->redirectee.filename->word, 0, (int *)0);
1195           cprintf ("<<< %s", x);
1196           free (x);
1197         }
1198       else
1199 #endif
1200         cprintf ("<<< %s", redirect->redirectee.filename->word);
1201       break;
1202
1203     case r_duplicating_input:
1204       if (redirect->rflags & REDIR_VARASSIGN)
1205         cprintf ("{%s}<&%d", redir_word->word, redir_fd);
1206       else
1207         cprintf ("%d<&%d", redirector, redir_fd);
1208       break;
1209
1210     case r_duplicating_output:
1211       if (redirect->rflags & REDIR_VARASSIGN)
1212         cprintf ("{%s}>&%d", redir_word->word, redir_fd);
1213       else
1214         cprintf ("%d>&%d", redirector, redir_fd);
1215       break;
1216
1217     case r_duplicating_input_word:
1218       if (redirect->rflags & REDIR_VARASSIGN)
1219         cprintf ("{%s}<&%s", redir_word->word, redirectee->word);
1220       else
1221         cprintf ("%d<&%s", redirector, redirectee->word);
1222       break;
1223
1224     case r_duplicating_output_word:
1225       if (redirect->rflags & REDIR_VARASSIGN)
1226         cprintf ("{%s}>&%s", redir_word->word, redirectee->word);
1227       else
1228         cprintf ("%d>&%s", redirector, redirectee->word);
1229       break;
1230
1231     case r_move_input:
1232       if (redirect->rflags & REDIR_VARASSIGN)
1233         cprintf ("{%s}<&%d-", redir_word->word, redir_fd);
1234       else
1235         cprintf ("%d<&%d-", redirector, redir_fd);
1236       break;
1237
1238     case r_move_output:
1239       if (redirect->rflags & REDIR_VARASSIGN)
1240         cprintf ("{%s}>&%d-", redir_word->word, redir_fd);
1241       else
1242         cprintf ("%d>&%d-", redirector, redir_fd);
1243       break;
1244
1245     case r_move_input_word:
1246       if (redirect->rflags & REDIR_VARASSIGN)
1247         cprintf ("{%s}<&%s-", redir_word->word, redirectee->word);
1248       else
1249         cprintf ("%d<&%s-", redirector, redirectee->word);
1250       break;
1251
1252     case r_move_output_word:
1253       if (redirect->rflags & REDIR_VARASSIGN)
1254         cprintf ("{%s}>&%s-", redir_word->word, redirectee->word);
1255       else
1256         cprintf ("%d>&%s-", redirector, redirectee->word);
1257       break;
1258
1259     case r_close_this:
1260       if (redirect->rflags & REDIR_VARASSIGN)
1261         cprintf ("{%s}>&-", redir_word->word);
1262       else
1263         cprintf ("%d>&-", redirector);
1264       break;
1265
1266     case r_err_and_out:
1267       cprintf ("&> %s", redirectee->word);
1268       break;
1269
1270     case r_append_err_and_out:
1271       cprintf ("&>> %s", redirectee->word);
1272       break;
1273     }
1274 }
1275
1276 static void
1277 reset_locals ()
1278 {
1279   inside_function_def = 0;
1280   indentation = 0;
1281   printing_connection = 0;
1282   deferred_heredocs = 0;
1283 }
1284
1285 static void
1286 print_function_def (func)
1287      FUNCTION_DEF *func;
1288 {
1289   COMMAND *cmdcopy;
1290   REDIRECT *func_redirects;
1291
1292   func_redirects = NULL;
1293   /* When in posix mode, print functions as posix specifies them. */
1294   if (posixly_correct == 0)
1295     cprintf ("function %s () \n", func->name->word);
1296   else
1297     cprintf ("%s () \n", func->name->word);
1298   add_unwind_protect (reset_locals, 0);
1299
1300   indent (indentation);
1301   cprintf ("{ \n");
1302
1303   inside_function_def++;
1304   indentation += indentation_amount;
1305
1306   cmdcopy = copy_command (func->command);
1307   if (cmdcopy->type == cm_group)
1308     {
1309       func_redirects = cmdcopy->redirects;
1310       cmdcopy->redirects = (REDIRECT *)NULL;
1311     }
1312   make_command_string_internal (cmdcopy->type == cm_group
1313                                         ? cmdcopy->value.Group->command
1314                                         : cmdcopy);
1315   /* XXX - PRINT_DEFERRED_HEREDOCS (""); ? */
1316
1317   remove_unwind_protect ();
1318   indentation -= indentation_amount;
1319   inside_function_def--;
1320
1321   if (func_redirects)
1322     { /* { */
1323       newline ("} ");
1324       print_redirection_list (func_redirects);
1325       cmdcopy->redirects = func_redirects;
1326     }
1327   else
1328     newline ("}");
1329
1330   dispose_command (cmdcopy);
1331 }
1332
1333 /* Return the string representation of the named function.
1334    NAME is the name of the function.
1335    COMMAND is the function body.  It should be a GROUP_COM.
1336    flags&FUNC_MULTILINE is non-zero to pretty-print, or zero for all on one line.
1337    flags&FUNC_EXTERNAL means convert from internal to external form
1338   */
1339 char *
1340 named_function_string (name, command, flags)
1341      char *name;
1342      COMMAND *command;
1343      int flags;
1344 {
1345   char *result;
1346   int old_indent, old_amount;
1347   COMMAND *cmdcopy;
1348   REDIRECT *func_redirects;
1349
1350   old_indent = indentation;
1351   old_amount = indentation_amount;
1352   command_string_index = was_heredoc = 0;
1353   deferred_heredocs = 0;
1354
1355   if (name && *name)
1356     {
1357       if (find_reserved_word (name) >= 0)
1358         cprintf ("function ");
1359       cprintf ("%s ", name);
1360     }
1361
1362   cprintf ("() ");
1363
1364   if ((flags & FUNC_MULTILINE) == 0)
1365     {
1366       indentation = 1;
1367       indentation_amount = 0;
1368     }
1369   else
1370     {
1371       cprintf ("\n");
1372       indentation += indentation_amount;
1373     }
1374
1375   inside_function_def++;
1376
1377   cprintf ((flags & FUNC_MULTILINE) ? "{ \n" : "{ ");
1378
1379   cmdcopy = copy_command (command);
1380   /* Take any redirections specified in the function definition (which should
1381      apply to the function as a whole) and save them for printing later. */
1382   func_redirects = (REDIRECT *)NULL;
1383   if (cmdcopy->type == cm_group)
1384     {
1385       func_redirects = cmdcopy->redirects;
1386       cmdcopy->redirects = (REDIRECT *)NULL;
1387     }
1388   make_command_string_internal (cmdcopy->type == cm_group
1389                                         ? cmdcopy->value.Group->command
1390                                         : cmdcopy);
1391   /* XXX - PRINT_DEFERRED_HEREDOCS (""); ? */
1392
1393   indentation = old_indent;
1394   indentation_amount = old_amount;
1395   inside_function_def--;
1396
1397   if (func_redirects)
1398     { /* { */
1399       newline ("} ");
1400       print_redirection_list (func_redirects);
1401       cmdcopy->redirects = func_redirects;
1402     }
1403   else
1404     newline ("}");
1405
1406   result = the_printed_command;
1407
1408   if ((flags & FUNC_MULTILINE) == 0)
1409     {
1410 #if 0
1411       register int i;
1412       for (i = 0; result[i]; i++)
1413         if (result[i] == '\n')
1414           {
1415             strcpy (result + i, result + i + 1);
1416             --i;
1417           }
1418 #else
1419       if (result[2] == '\n')    /* XXX -- experimental */
1420         memmove (result + 2, result + 3, strlen (result) - 2);
1421 #endif
1422     }
1423
1424   dispose_command (cmdcopy);
1425
1426   if (flags & FUNC_EXTERNAL)
1427     result = remove_quoted_escapes (result);
1428
1429   return (result);
1430 }
1431
1432 static void
1433 newline (string)
1434      char *string;
1435 {
1436   cprintf ("\n");
1437   indent (indentation);
1438   if (string && *string)
1439     cprintf ("%s", string);
1440 }
1441
1442 static char *indentation_string;
1443 static int indentation_size;
1444
1445 static void
1446 indent (amount)
1447      int amount;
1448 {
1449   register int i;
1450
1451   RESIZE_MALLOCED_BUFFER (indentation_string, 0, amount, indentation_size, 16);
1452
1453   for (i = 0; amount > 0; amount--)
1454     indentation_string[i++] = ' ';
1455   indentation_string[i] = '\0';
1456   cprintf ("%s", indentation_string);
1457 }
1458
1459 static void
1460 semicolon ()
1461 {
1462   if (command_string_index > 0 &&
1463        (the_printed_command[command_string_index - 1] == '&' ||
1464         the_printed_command[command_string_index - 1] == '\n'))
1465     return;
1466   cprintf (";");
1467 }
1468
1469 /* How to make the string. */
1470 static void
1471 #if defined (PREFER_STDARG)
1472 cprintf (const char *control, ...)
1473 #else
1474 cprintf (control, va_alist)
1475      const char *control;
1476      va_dcl
1477 #endif
1478 {
1479   register const char *s;
1480   char char_arg[2], *argp, intbuf[INT_STRLEN_BOUND (unsigned int) + 1];
1481   int digit_arg, arg_len, c;
1482   va_list args;
1483
1484   SH_VA_START (args, control);
1485
1486   arg_len = strlen (control);
1487   the_printed_command_resize (arg_len + 1);
1488
1489   char_arg[1] = '\0';
1490   s = control;
1491   while (s && *s)
1492     {
1493       c = *s++;
1494       argp = (char *)NULL;
1495       if (c != '%' || !*s)
1496         {
1497           char_arg[0] = c;
1498           argp = char_arg;
1499           arg_len = 1;
1500         }
1501       else
1502         {
1503           c = *s++;
1504           switch (c)
1505             {
1506             case '%':
1507               char_arg[0] = c;
1508               argp = char_arg;
1509               arg_len = 1;
1510               break;
1511
1512             case 's':
1513               argp = va_arg (args, char *);
1514               arg_len = strlen (argp);
1515               break;
1516
1517             case 'd':
1518               /* Represent an out-of-range file descriptor with an out-of-range
1519                  integer value.  We can do this because the only use of `%d' in
1520                  the calls to cprintf is to output a file descriptor number for
1521                  a redirection. */
1522               digit_arg = va_arg (args, int);
1523               if (digit_arg < 0)
1524                 {
1525                   sprintf (intbuf, "%u", (unsigned int)-1);
1526                   argp = intbuf;
1527                 }
1528               else
1529                 argp = inttostr (digit_arg, intbuf, sizeof (intbuf));
1530               arg_len = strlen (argp);
1531               break;
1532
1533             case 'c':
1534               char_arg[0] = va_arg (args, int);
1535               argp = char_arg;
1536               arg_len = 1;
1537               break;
1538
1539             default:
1540               programming_error (_("cprintf: `%c': invalid format character"), c);
1541               /*NOTREACHED*/
1542             }
1543         }
1544
1545       if (argp && arg_len)
1546         {
1547           the_printed_command_resize (arg_len + 1);
1548           FASTCOPY (argp, the_printed_command + command_string_index, arg_len);
1549           command_string_index += arg_len;
1550         }
1551     }
1552
1553   va_end (args);
1554
1555   the_printed_command[command_string_index] = '\0';
1556 }
1557
1558 /* Ensure that there is enough space to stuff LENGTH characters into
1559    THE_PRINTED_COMMAND. */
1560 static void
1561 the_printed_command_resize (length)
1562      int length;
1563 {
1564   if (the_printed_command == 0)
1565     {
1566       the_printed_command_size = (length + PRINTED_COMMAND_INITIAL_SIZE - 1) & ~(PRINTED_COMMAND_INITIAL_SIZE - 1);
1567       the_printed_command = (char *)xmalloc (the_printed_command_size);
1568       command_string_index = 0;
1569     }
1570   else if ((command_string_index + length) >= the_printed_command_size)
1571     {
1572       int new;
1573       new = command_string_index + length + 1;
1574
1575       /* Round up to the next multiple of PRINTED_COMMAND_GROW_SIZE. */
1576       new = (new + PRINTED_COMMAND_GROW_SIZE - 1) & ~(PRINTED_COMMAND_GROW_SIZE - 1);
1577       the_printed_command_size = new;
1578
1579       the_printed_command = (char *)xrealloc (the_printed_command, the_printed_command_size);
1580     }
1581 }
1582
1583 #if defined (HAVE_VPRINTF)
1584 /* ``If vprintf is available, you may assume that vfprintf and vsprintf are
1585      also available.'' */
1586
1587 static void
1588 #if defined (PREFER_STDARG)
1589 xprintf (const char *format, ...)
1590 #else
1591 xprintf (format, va_alist)
1592      const char *format;
1593      va_dcl
1594 #endif
1595 {
1596   va_list args;
1597
1598   SH_VA_START (args, format);
1599
1600   vfprintf (stdout, format, args);
1601   va_end (args);
1602 }
1603
1604 #else
1605
1606 static void
1607 xprintf (format, arg1, arg2, arg3, arg4, arg5)
1608      const char *format;
1609 {
1610   printf (format, arg1, arg2, arg3, arg4, arg5);
1611 }
1612
1613 #endif /* !HAVE_VPRINTF */