git.sur5r.net Git - openocd/blob - src/helper/command.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008, Duane Ellis                                       *
   9  *   openocd@duaneeellis.com                                               *
  10  *                                                                         *
  11  *   part of this file is taken from libcli (libcli.sourceforge.net)       *
  12  *   Copyright (C) David Parrish (david@dparrish.com)                      *
  13  *                                                                         *
  14  *   This program is free software; you can redistribute it and/or modify  *
  15  *   it under the terms of the GNU General Public License as published by  *
  16  *   the Free Software Foundation; either version 2 of the License, or     *
  17  *   (at your option) any later version.                                   *
  18  *                                                                         *
  19  *   This program is distributed in the hope that it will be useful,       *
  20  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  21  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  22  *   GNU General Public License for more details.                          *
  23  *                                                                         *
  24  *   You should have received a copy of the GNU General Public License     *
  25  *   along with this program; if not, write to the                         *
  26  *   Free Software Foundation, Inc.,                                       *
  27  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  28  ***************************************************************************/
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include "replacements.h"
  34 #include "target.h"
  35 #include "command.h"
  36 #include "configuration.h"
  37
  38 #include "log.h"
  39 #include "time_support.h"
  40 #include "jim-eventloop.h"
  41
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <ctype.h>
  45 #include <stdarg.h>
  46 #include <stdio.h>
  47 #include <unistd.h>
  48 #include <errno.h>
  49
  50 int fast_and_dangerous = 0;
  51 Jim_Interp *interp = NULL;
  52
  53 int handle_sleep_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  54 int handle_fast_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  55
  56 int run_command(command_context_t *context, command_t *c, char *words[], int num_words);
  57
  58 static void tcl_output(void *privData, const char *file, int line, const char *function, const char *string)
  59 {
  60         Jim_Obj *tclOutput=(Jim_Obj *)privData;
  61
  62         Jim_AppendString(interp, tclOutput, string, strlen(string));
  63 }
  64
  65 extern command_context_t *global_cmd_ctx;
  66
  67
  68 static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
  69 {
  70         /* the private data is stashed in the interp structure */
  71         command_t *c;
  72         command_context_t *context;
  73         int retval;
  74         int i;
  75         int nwords;
  76         char **words;
  77
  78         target_call_timer_callbacks_now();
  79         LOG_USER_N("%s", ""); /* Keep GDB connection alive*/
  80
  81         c = interp->cmdPrivData;
  82         LOG_DEBUG("script_command - %s", c->name);
  83
  84         words = malloc(sizeof(char *) * argc);
  85         for (i = 0; i < argc; i++)
  86         {
  87                 int len;
  88                 const char *w=Jim_GetString(argv[i], &len);
  89                 if (*w=='#')
  90                 {
  91                         /* hit an end of line comment */
  92                         break;
  93                 }
  94                 words[i] = strdup(w);
  95                 if (words[i] == NULL)
  96                 {
  97                         return JIM_ERR;
  98                 }
  99                 LOG_DEBUG("script_command - %s, argv[%u]=%s", c->name, i, words[i]);
 100         }
 101         nwords = i;
 102
 103         /* grab the command context from the associated data */
 104         context = Jim_GetAssocData(interp, "context");
 105         if (context == NULL)
 106         {
 107                 /* Tcl can invoke commands directly instead of via command_run_line(). This would
 108                  * happen when the Jim Tcl interpreter is provided by eCos.
 109                  */
 110                 context = global_cmd_ctx;
 111         }
 112
 113         /* capture log output and return it */
 114         Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);
 115         /* a garbage collect can happen, so we need a reference count to this object */
 116         Jim_IncrRefCount(tclOutput);
 117
 118         log_add_callback(tcl_output, tclOutput);
 119
 120         retval = run_command(context, c, words, nwords);
 121
 122         log_remove_callback(tcl_output, tclOutput);
 123
 124         /* We dump output into this local variable */
 125         Jim_SetResult(interp, tclOutput);
 126         Jim_DecrRefCount(interp, tclOutput);
 127
 128         for (i = 0; i < nwords; i++)
 129                 free(words[i]);
 130         free(words);
 131
 132         int *return_retval = Jim_GetAssocData(interp, "retval");
 133         if (return_retval != NULL)
 134         {
 135                 *return_retval = retval;
 136         }
 137
 138         return (retval==ERROR_OK)?JIM_OK:JIM_ERR;
 139 }
 140
 141 command_t* register_command(command_context_t *context, command_t *parent, char *name, int (*handler)(struct command_context_s *context, char* name, char** args, int argc), enum command_mode mode, char *help)
 142 {
 143         command_t *c, *p;
 144
 145         if (!context || !name)
 146                 return NULL;
 147
 148         c = malloc(sizeof(command_t));
 149
 150         c->name = strdup(name);
 151         c->parent = parent;
 152         c->children = NULL;
 153         c->handler = handler;
 154         c->mode = mode;
 155         if (!help)
 156                 help="";
 157         c->next = NULL;
 158
 159         /* place command in tree */
 160         if (parent)
 161         {
 162                 if (parent->children)
 163                 {
 164                         /* find last child */
 165                         for (p = parent->children; p && p->next; p = p->next);
 166                         if (p)
 167                                 p->next = c;
 168                 }
 169                 else
 170                 {
 171                         parent->children = c;
 172                 }
 173         }
 174         else
 175         {
 176                 if (context->commands)
 177                 {
 178                         /* find last command */
 179                         for (p = context->commands; p && p->next; p = p->next);
 180                         if (p)
 181                                 p->next = c;
 182                 }
 183                 else
 184                 {
 185                         context->commands = c;
 186                 }
 187         }
 188
 189         /* just a placeholder, no handler */
 190         if (c->handler==NULL)
 191                 return c;
 192
 193         /* If this is a two level command, e.g. "flash banks", then the
 194          * "unknown" proc in startup.tcl must redirect to  this command.
 195          *
 196          * "flash banks" is translated by "unknown" to "flash_banks"
 197          * if such a proc exists
 198          */
 199         /* Print help for command */
 200         const char *t1="";
 201         const char *t2="";
 202         const char *t3="";
 203         /* maximum of two levels :-) */
 204         if (c->parent!=NULL)
 205         {
 206                 t1=c->parent->name;
 207                 t2="_";
 208         }
 209         t3=c->name;
 210         const char *full_name=alloc_printf("ocd_%s%s%s", t1, t2, t3);
 211         Jim_CreateCommand(interp, full_name, script_command, c, NULL);
 212         free((void *)full_name);
 213
 214         /* we now need to add an overrideable proc */
 215         const char *override_name=alloc_printf("proc %s%s%s {args} {if {[catch {eval \"ocd_%s%s%s $args\"}]==0} {return \"\"} else { return -code error }", t1, t2, t3, t1, t2, t3);
 216         Jim_Eval_Named(interp, override_name, __FILE__, __LINE__ );
 217         free((void *)override_name);
 218
 219         /* accumulate help text in Tcl helptext list.  */
 220     Jim_Obj *helptext=Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
 221     if (Jim_IsShared(helptext))
 222         helptext = Jim_DuplicateObj(interp, helptext);
 223         Jim_Obj *cmd_entry=Jim_NewListObj(interp, NULL, 0);
 224
 225         Jim_Obj *cmd_list=Jim_NewListObj(interp, NULL, 0);
 226
 227         /* maximum of two levels :-) */
 228         if (c->parent!=NULL)
 229         {
 230                 Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, c->parent->name, -1));
 231         }
 232         Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, c->name, -1));
 233
 234         Jim_ListAppendElement(interp, cmd_entry, cmd_list);
 235         Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, help, -1));
 236         Jim_ListAppendElement(interp, helptext, cmd_entry);
 237         return c;
 238 }
 239
 240 int unregister_all_commands(command_context_t *context)
 241 {
 242         command_t *c, *c2;
 243
 244         if (context == NULL)
 245                 return ERROR_OK;
 246
 247         while(NULL != context->commands)
 248         {
 249                 c = context->commands;
 250
 251                 while(NULL != c->children)
 252                 {
 253                         c2 = c->children;
 254                         c->children = c->children->next;
 255                         free(c2->name);
 256                         c2->name = NULL;
 257                         free(c2);
 258                         c2 = NULL;
 259                 }
 260
 261                 context->commands = context->commands->next;
 262
 263                 free(c->name);
 264                 c->name = NULL;
 265                 free(c);
 266                 c = NULL;
 267         }
 268
 269         return ERROR_OK;
 270 }
 271
 272 int unregister_command(command_context_t *context, char *name)
 273 {
 274         command_t *c, *p = NULL, *c2;
 275
 276         if ((!context) || (!name))
 277                 return ERROR_INVALID_ARGUMENTS;
 278
 279         /* find command */
 280         for (c = context->commands; c; c = c->next)
 281         {
 282                 if (strcmp(name, c->name) == 0)
 283                 {
 284                         /* unlink command */
 285                         if (p)
 286                         {
 287                                 p->next = c->next;
 288                         }
 289                         else
 290                         {
 291                                 context->commands = c->next;
 292                         }
 293
 294                         /* unregister children */
 295                         if (c->children)
 296                         {
 297                                 for (c2 = c->children; c2; c2 = c2->next)
 298                                 {
 299                                         free(c2->name);
 300                                         free(c2);
 301                                 }
 302                         }
 303
 304                         /* delete command */
 305                         free(c->name);
 306                         free(c);
 307                 }
 308
 309                 /* remember the last command for unlinking */
 310                 p = c;
 311         }
 312
 313         return ERROR_OK;
 314 }
 315
 316 void command_output_text(command_context_t *context, const char *data)
 317 {
 318         if( context && context->output_handler && data  ){
 319                 context->output_handler( context, data );
 320         }
 321 }
 322
 323 void command_print_n(command_context_t *context, char *format, ...)
 324 {
 325         char *string;
 326
 327         va_list ap;
 328         va_start(ap, format);
 329
 330         string = alloc_vprintf(format, ap);
 331         if (string != NULL)
 332         {
 333                 /* we want this collected in the log + we also want to pick it up as a tcl return
 334                  * value.
 335                  *
 336                  * The latter bit isn't precisely neat, but will do for now.
 337                  */
 338                 LOG_USER_N("%s", string);
 339                 // We already printed it above
 340                 //command_output_text(context, string);
 341                 free(string);
 342         }
 343
 344         va_end(ap);
 345 }
 346
 347 void command_print(command_context_t *context, char *format, ...)
 348 {
 349         char *string;
 350
 351         va_list ap;
 352         va_start(ap, format);
 353
 354         string = alloc_vprintf(format, ap);
 355         if (string != NULL)
 356         {
 357                 strcat(string, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one char longer */
 358                 /* we want this collected in the log + we also want to pick it up as a tcl return
 359                  * value.
 360                  *
 361                  * The latter bit isn't precisely neat, but will do for now.
 362                  */
 363                 LOG_USER_N("%s", string);
 364                 // We already printed it above
 365                 //command_output_text(context, string);
 366                 free(string);
 367         }
 368
 369         va_end(ap);
 370 }
 371
 372 int run_command(command_context_t *context, command_t *c, char *words[], int num_words)
 373 {
 374         int start_word=0;
 375         if (!((context->mode == COMMAND_CONFIG) || (c->mode == COMMAND_ANY) || (c->mode == context->mode) ))
 376         {
 377                 /* Config commands can not run after the config stage */
 378                 LOG_ERROR("Illegal mode for command");
 379                 return ERROR_FAIL;
 380         }
 381
 382         int retval = c->handler(context, c->name, words + start_word + 1, num_words - start_word - 1);
 383         if (retval == ERROR_COMMAND_SYNTAX_ERROR)
 384         {
 385                 /* Print help for command */
 386                 const char *t1="";
 387                 const char *t2="";
 388                 const char *t3="";
 389                 /* maximum of two levels :-) */
 390                 if (c->parent!=NULL)
 391                 {
 392                         t1=c->parent->name;
 393                         t2=" ";
 394                 }
 395                 t3=c->name;
 396                 command_run_linef(context, "help {%s%s%s}", t1, t2, t3);
 397         }
 398         else if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
 399         {
 400                 /* just fall through for a shutdown request */
 401         }
 402         else if (retval != ERROR_OK)
 403         {
 404                 /* we do not print out an error message because the command *should*
 405                  * have printed out an error
 406                  */
 407                 LOG_DEBUG("Command failed with error code %d", retval);
 408         }
 409
 410         return retval;
 411 }
 412
 413 int command_run_line(command_context_t *context, char *line)
 414 {
 415         /* all the parent commands have been registered with the interpreter
 416          * so, can just evaluate the line as a script and check for
 417          * results
 418          */
 419         /* run the line thru a script engine */
 420         int retval=ERROR_FAIL;
 421         int retcode;
 422         /* Beware! This code needs to be reentrant. It is also possible
 423          * for OpenOCD commands to be invoked directly from Tcl. This would
 424          * happen when the Jim Tcl interpreter is provided by eCos for
 425          * instance.
 426          */
 427         Jim_DeleteAssocData(interp, "context");
 428         retcode = Jim_SetAssocData(interp, "context", NULL, context);
 429         if (retcode == JIM_OK)
 430         {
 431                 /* associated the return value */
 432                 Jim_DeleteAssocData(interp, "retval");
 433                 retcode = Jim_SetAssocData(interp, "retval", NULL, &retval);
 434                 if (retcode == JIM_OK)
 435                 {
 436                         retcode = Jim_Eval_Named(interp, line, __FILE__, __LINE__ );
 437
 438                         Jim_DeleteAssocData(interp, "retval");
 439                 }
 440                 Jim_DeleteAssocData(interp, "context");
 441         }
 442         if (retcode == JIM_ERR) {
 443                 if (retval!=ERROR_COMMAND_CLOSE_CONNECTION)
 444                 {
 445                         /* We do not print the connection closed error message */
 446                         Jim_PrintErrorMessage(interp);
 447                 }
 448                 if (retval==ERROR_OK)
 449                 {
 450                         /* It wasn't a low level OpenOCD command that failed */
 451                         return ERROR_FAIL;
 452                 }
 453                 return retval;
 454         } else if (retcode == JIM_EXIT) {
 455                 /* ignore. */
 456                 /* exit(Jim_GetExitCode(interp)); */
 457         } else {
 458                 const char *result;
 459                 int reslen;
 460
 461                 result = Jim_GetString(Jim_GetResult(interp), &reslen);
 462                 if (reslen) {
 463                         int i;
 464                         char buff[256+1];
 465                         for (i = 0; i < reslen; i += 256)
 466                         {
 467                                 int chunk;
 468                                 chunk = reslen - i;
 469                                 if (chunk > 256)
 470                                         chunk = 256;
 471                                 strncpy(buff, result+i, chunk);
 472                                 buff[chunk] = 0;
 473                                 LOG_USER_N("%s", buff);
 474                         }
 475                         LOG_USER_N("%s", "\n");
 476                 }
 477         }
 478         return retval;
 479 }
 480
 481 int command_run_linef(command_context_t *context, char *format, ...)
 482 {
 483         int retval=ERROR_FAIL;
 484         char *string;
 485         va_list ap;
 486         va_start(ap, format);
 487         string = alloc_vprintf(format, ap);
 488         if (string!=NULL)
 489         {
 490                 retval=command_run_line(context, string);
 491         }
 492         va_end(ap);
 493         return retval;
 494 }
 495
 496 void command_set_output_handler(command_context_t* context, int (*output_handler)(struct command_context_s *context, const char* line), void *priv)
 497 {
 498         context->output_handler = output_handler;
 499         context->output_handler_priv = priv;
 500 }
 501
 502 command_context_t* copy_command_context(command_context_t* context)
 503 {
 504         command_context_t* copy_context = malloc(sizeof(command_context_t));
 505
 506         *copy_context = *context;
 507
 508         return copy_context;
 509 }
 510
 511 int command_done(command_context_t *context)
 512 {
 513         free(context);
 514         context = NULL;
 515
 516         return ERROR_OK;
 517 }
 518
 519 /* find full path to file */
 520 static int jim_find(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 521 {
 522         if (argc != 2)
 523                 return JIM_ERR;
 524         const char *file = Jim_GetString(argv[1], NULL);
 525         char *full_path = find_file(file);
 526         if (full_path == NULL)
 527                 return JIM_ERR;
 528         Jim_Obj *result = Jim_NewStringObj(interp, full_path, strlen(full_path));
 529         free(full_path);
 530
 531         Jim_SetResult(interp, result);
 532         return JIM_OK;
 533 }
 534
 535 static int jim_echo(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 536 {
 537         if (argc != 2)
 538                 return JIM_ERR;
 539         const char *str = Jim_GetString(argv[1], NULL);
 540         LOG_USER("%s", str);
 541         return JIM_OK;
 542 }
 543
 544 static size_t openocd_jim_fwrite(const void *_ptr, size_t size, size_t n, void *cookie)
 545 {
 546         size_t nbytes;
 547         const char *ptr;
 548         Jim_Interp *interp;
 549
 550         /* make it a char easier to read code */
 551         ptr = _ptr;
 552         interp = cookie;
 553         nbytes = size * n;
 554         if (ptr == NULL || interp == NULL || nbytes == 0) {
 555                 return 0;
 556         }
 557
 558         /* do we have to chunk it? */
 559         if (ptr[nbytes] == 0)
 560         {
 561                 /* no it is a C style string */
 562                 LOG_USER_N("%s", ptr);
 563                 return strlen(ptr);
 564         }
 565         /* GRR we must chunk - not null terminated */
 566         while (nbytes) {
 567                 char chunk[128+1];
 568                 int x;
 569
 570                 x = nbytes;
 571                 if (x > 128) {
 572                         x = 128;
 573                 }
 574                 /* copy it */
 575                 memcpy(chunk, ptr, x);
 576                 /* terminate it */
 577                 chunk[n] = 0;
 578                 /* output it */
 579                 LOG_USER_N("%s", chunk);
 580                 ptr += x;
 581                 nbytes -= x;
 582         }
 583
 584         return n;
 585 }
 586
 587 static size_t openocd_jim_fread(void *ptr, size_t size, size_t n, void *cookie)
 588 {
 589         /* TCL wants to read... tell him no */
 590         return 0;
 591 }
 592
 593 static int openocd_jim_vfprintf(void *cookie, const char *fmt, va_list ap)
 594 {
 595         char *cp;
 596         int n;
 597         Jim_Interp *interp;
 598
 599         n = -1;
 600         interp = cookie;
 601         if (interp == NULL)
 602                 return n;
 603
 604         cp = alloc_vprintf(fmt, ap);
 605         if (cp)
 606         {
 607                 LOG_USER_N("%s", cp);
 608                 n = strlen(cp);
 609                 free(cp);
 610         }
 611         return n;
 612 }
 613
 614 static int openocd_jim_fflush(void *cookie)
 615 {
 616         /* nothing to flush */
 617         return 0;
 618 }
 619
 620 static char* openocd_jim_fgets(char *s, int size, void *cookie)
 621 {
 622         /* not supported */
 623         errno = ENOTSUP;
 624         return NULL;
 625 }
 626
 627 command_context_t* command_init()
 628 {
 629         command_context_t* context = malloc(sizeof(command_context_t));
 630         extern unsigned const char startup_tcl[];
 631
 632         context->mode = COMMAND_EXEC;
 633         context->commands = NULL;
 634         context->current_target = 0;
 635         context->output_handler = NULL;
 636         context->output_handler_priv = NULL;
 637
 638 #ifdef JIM_EMBEDDED
 639         Jim_InitEmbedded();
 640         /* Create an interpreter */
 641         interp = Jim_CreateInterp();
 642         /* Add all the Jim core commands */
 643         Jim_RegisterCoreCommands(interp);
 644 #endif
 645
 646         Jim_CreateCommand(interp, "ocd_find", jim_find, NULL, NULL);
 647         Jim_CreateCommand(interp, "echo", jim_echo, NULL, NULL);
 648
 649         /* Set Jim's STDIO */
 650         interp->cookie_stdin = interp;
 651         interp->cookie_stdout = interp;
 652         interp->cookie_stderr = interp;
 653         interp->cb_fwrite = openocd_jim_fwrite;
 654         interp->cb_fread = openocd_jim_fread ;
 655         interp->cb_vfprintf = openocd_jim_vfprintf;
 656         interp->cb_fflush = openocd_jim_fflush;
 657         interp->cb_fgets = openocd_jim_fgets;
 658
 659         add_default_dirs();
 660
 661 #ifdef JIM_EMBEDDED
 662         Jim_EventLoopOnLoad(interp);
 663 #endif
 664         if (Jim_Eval_Named(interp, startup_tcl, "embedded:startup.tcl",1)==JIM_ERR)
 665         {
 666                 LOG_ERROR("Failed to run startup.tcl (embedded into OpenOCD compile time)");
 667                 Jim_PrintErrorMessage(interp);
 668                 exit(-1);
 669         }
 670
 671         register_command(context, NULL, "sleep", handle_sleep_command,
 672                                          COMMAND_ANY, "sleep for <n> milliseconds");
 673
 674         register_command(context, NULL, "fast", handle_fast_command,
 675                                          COMMAND_ANY, "fast <enable/disable> - place at beginning of config files. Sets defaults to fast and dangerous.");
 676
 677         return context;
 678 }
 679
 680 int command_context_mode(command_context_t *cmd_ctx, enum command_mode mode)
 681 {
 682         if (!cmd_ctx)
 683                 return ERROR_INVALID_ARGUMENTS;
 684
 685         cmd_ctx->mode = mode;
 686         return ERROR_OK;
 687 }
 688
 689 /* sleep command sleeps for <n> miliseconds
 690  * this is useful in target startup scripts
 691  */
 692 int handle_sleep_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 693 {
 694         unsigned long duration = 0;
 695
 696         if (argc == 1)
 697         {
 698                 duration = strtoul(args[0], NULL, 0);
 699                 alive_sleep(duration);
 700         }
 701
 702         return ERROR_OK;
 703 }
 704
 705 int handle_fast_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 706 {
 707         if (argc!=1)
 708                 return ERROR_COMMAND_SYNTAX_ERROR;
 709
 710         fast_and_dangerous = strcmp("enable", args[0])==0;
 711
 712         return ERROR_OK;
 713 }
 714
 715 void process_jim_events(void)
 716 {
 717 #ifdef JIM_EMBEDDED
 718         static int recursion = 0;
 719
 720         if (!recursion)
 721         {
 722                 recursion++;
 723                 Jim_ProcessEvents (interp, JIM_ALL_EVENTS|JIM_DONT_WAIT);
 724                 recursion--;
 725         }
 726 #endif
 727 }
 728
 729 void register_jim(struct command_context_s *cmd_ctx, const char *name, int (*cmd)(Jim_Interp *interp, int argc, Jim_Obj *const *argv), const char *help)
 730 {
 731         Jim_CreateCommand(interp, name, cmd, NULL, NULL);
 732
 733         /* FIX!!! it would be prettier to invoke add_help_text...
 734            accumulate help text in Tcl helptext list.  */
 735         Jim_Obj *helptext=Jim_GetGlobalVariableStr(interp, "ocd_helptext", JIM_ERRMSG);
 736         if (Jim_IsShared(helptext))
 737                 helptext = Jim_DuplicateObj(interp, helptext);
 738
 739         Jim_Obj *cmd_entry=Jim_NewListObj(interp, NULL, 0);
 740
 741         Jim_Obj *cmd_list=Jim_NewListObj(interp, NULL, 0);
 742         Jim_ListAppendElement(interp, cmd_list, Jim_NewStringObj(interp, name, -1));
 743
 744         Jim_ListAppendElement(interp, cmd_entry, cmd_list);
 745         Jim_ListAppendElement(interp, cmd_entry, Jim_NewStringObj(interp, help, -1));
 746         Jim_ListAppendElement(interp, helptext, cmd_entry);
 747 }