common/command.c

   1 /*
   2  * (C) Copyright 2000-2009
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  *  Command Processor Table
  26  */
  27
  28 #include <common.h>
  29 #include <command.h>
  30
  31 int
  32 do_version (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  33 {
  34         extern char version_string[];
  35         printf ("\n%s\n", version_string);
  36         return 0;
  37 }
  38
  39 U_BOOT_CMD(
  40         version,        1,              1,      do_version,
  41         "print monitor version",
  42         ""
  43 );
  44
  45 #if defined(CONFIG_CMD_ECHO)
  46
  47 int
  48 do_echo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  49 {
  50         int i, putnl = 1;
  51
  52         for (i = 1; i < argc; i++) {
  53                 char *p = argv[i], c;
  54
  55                 if (i > 1)
  56                         putc(' ');
  57                 while ((c = *p++) != '\0') {
  58                         if (c == '\\' && *p == 'c') {
  59                                 putnl = 0;
  60                                 p++;
  61                         } else {
  62                                 putc(c);
  63                         }
  64                 }
  65         }
  66
  67         if (putnl)
  68                 putc('\n');
  69         return 0;
  70 }
  71
  72 U_BOOT_CMD(
  73         echo,   CONFIG_SYS_MAXARGS,     1,      do_echo,
  74         "echo args to console",
  75         "[args..]\n"
  76         "    - echo args to console; \\c suppresses newline"
  77 );
  78
  79 #endif
  80
  81 #ifdef CONFIG_SYS_HUSH_PARSER
  82
  83 int
  84 do_test (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  85 {
  86         char **ap;
  87         int left, adv, expr, last_expr, neg, last_cmp;
  88
  89         /* args? */
  90         if (argc < 3)
  91                 return 1;
  92
  93 #if 0
  94         {
  95                 printf("test:");
  96                 left = 1;
  97                 while (argv[left])
  98                         printf(" %s", argv[left++]);
  99         }
 100 #endif
 101
 102         last_expr = 0;
 103         left = argc - 1; ap = argv + 1;
 104         if (left > 0 && strcmp(ap[0], "!") == 0) {
 105                 neg = 1;
 106                 ap++;
 107                 left--;
 108         } else
 109                 neg = 0;
 110
 111         expr = -1;
 112         last_cmp = -1;
 113         last_expr = -1;
 114         while (left > 0) {
 115
 116                 if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0)
 117                         adv = 1;
 118                 else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0)
 119                         adv = 2;
 120                 else
 121                         adv = 3;
 122
 123                 if (left < adv) {
 124                         expr = 1;
 125                         break;
 126                 }
 127
 128                 if (adv == 1) {
 129                         if (strcmp(ap[0], "-o") == 0) {
 130                                 last_expr = expr;
 131                                 last_cmp = 0;
 132                         } else if (strcmp(ap[0], "-a") == 0) {
 133                                 last_expr = expr;
 134                                 last_cmp = 1;
 135                         } else {
 136                                 expr = 1;
 137                                 break;
 138                         }
 139                 }
 140
 141                 if (adv == 2) {
 142                         if (strcmp(ap[0], "-z") == 0)
 143                                 expr = strlen(ap[1]) == 0 ? 1 : 0;
 144                         else if (strcmp(ap[0], "-n") == 0)
 145                                 expr = strlen(ap[1]) == 0 ? 0 : 1;
 146                         else {
 147                                 expr = 1;
 148                                 break;
 149                         }
 150
 151                         if (last_cmp == 0)
 152                                 expr = last_expr || expr;
 153                         else if (last_cmp == 1)
 154                                 expr = last_expr && expr;
 155                         last_cmp = -1;
 156                 }
 157
 158                 if (adv == 3) {
 159                         if (strcmp(ap[1], "=") == 0)
 160                                 expr = strcmp(ap[0], ap[2]) == 0;
 161                         else if (strcmp(ap[1], "!=") == 0)
 162                                 expr = strcmp(ap[0], ap[2]) != 0;
 163                         else if (strcmp(ap[1], ">") == 0)
 164                                 expr = strcmp(ap[0], ap[2]) > 0;
 165                         else if (strcmp(ap[1], "<") == 0)
 166                                 expr = strcmp(ap[0], ap[2]) < 0;
 167                         else if (strcmp(ap[1], "-eq") == 0)
 168                                 expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
 169                         else if (strcmp(ap[1], "-ne") == 0)
 170                                 expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
 171                         else if (strcmp(ap[1], "-lt") == 0)
 172                                 expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
 173                         else if (strcmp(ap[1], "-le") == 0)
 174                                 expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
 175                         else if (strcmp(ap[1], "-gt") == 0)
 176                                 expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
 177                         else if (strcmp(ap[1], "-ge") == 0)
 178                                 expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
 179                         else {
 180                                 expr = 1;
 181                                 break;
 182                         }
 183
 184                         if (last_cmp == 0)
 185                                 expr = last_expr || expr;
 186                         else if (last_cmp == 1)
 187                                 expr = last_expr && expr;
 188                         last_cmp = -1;
 189                 }
 190
 191                 ap += adv; left -= adv;
 192         }
 193
 194         if (neg)
 195                 expr = !expr;
 196
 197         expr = !expr;
 198
 199         debug (": returns %d\n", expr);
 200
 201         return expr;
 202 }
 203
 204 U_BOOT_CMD(
 205         test,   CONFIG_SYS_MAXARGS,     1,      do_test,
 206         "minimal test like /bin/sh",
 207         "[args..]"
 208 );
 209
 210 int
 211 do_exit (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 212 {
 213         int r;
 214
 215         r = 0;
 216         if (argc > 1)
 217                 r = simple_strtoul(argv[1], NULL, 10);
 218
 219         return -r - 2;
 220 }
 221
 222 U_BOOT_CMD(
 223         exit,   2,      1,      do_exit,
 224         "exit script",
 225         ""
 226 );
 227
 228
 229 #endif
 230
 231 /*
 232  * Use puts() instead of printf() to avoid printf buffer overflow
 233  * for long help messages
 234  */
 235
 236 int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int
 237               flag, int argc, char *argv[])
 238 {
 239         int i;
 240         int rcode = 0;
 241
 242         if (argc == 1) {        /*show list of commands */
 243                 cmd_tbl_t *cmd_array[cmd_items];
 244                 int i, j, swaps;
 245
 246                 /* Make array of commands from .uboot_cmd section */
 247                 cmdtp = cmd_start;
 248                 for (i = 0; i < cmd_items; i++) {
 249                         cmd_array[i] = cmdtp++;
 250                 }
 251
 252                 /* Sort command list (trivial bubble sort) */
 253                 for (i = cmd_items - 1; i > 0; --i) {
 254                         swaps = 0;
 255                         for (j = 0; j < i; ++j) {
 256                                 if (strcmp (cmd_array[j]->name,
 257                                             cmd_array[j + 1]->name) > 0) {
 258                                         cmd_tbl_t *tmp;
 259                                         tmp = cmd_array[j];
 260                                         cmd_array[j] = cmd_array[j + 1];
 261                                         cmd_array[j + 1] = tmp;
 262                                         ++swaps;
 263                                 }
 264                         }
 265                         if (!swaps)
 266                                 break;
 267                 }
 268
 269                 /* print short help (usage) */
 270                 for (i = 0; i < cmd_items; i++) {
 271                         const char *usage = cmd_array[i]->usage;
 272
 273                         /* allow user abort */
 274                         if (ctrlc ())
 275                                 return 1;
 276                         if (usage == NULL)
 277                                 continue;
 278                         printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
 279                                cmd_array[i]->name, usage);
 280                 }
 281                 return 0;
 282         }
 283         /*
 284          * command help (long version)
 285          */
 286         for (i = 1; i < argc; ++i) {
 287                 if ((cmdtp = find_cmd_tbl (argv[i], cmd_start, cmd_items )) != NULL) {
 288                         rcode |= cmd_usage(cmdtp);
 289                 } else {
 290                         printf ("Unknown command '%s' - try 'help'"
 291                                 " without arguments for list of all"
 292                                 " known commands\n\n", argv[i]
 293                                         );
 294                         rcode = 1;
 295                 }
 296         }
 297         return rcode;
 298 }
 299
 300 int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 301 {
 302         return _do_help(&__u_boot_cmd_start,
 303                         &__u_boot_cmd_end - &__u_boot_cmd_start,
 304                         cmdtp, flag, argc, argv);
 305 }
 306
 307
 308 U_BOOT_CMD(
 309         help,   CONFIG_SYS_MAXARGS,     1,      do_help,
 310         "print online help",
 311         "[command ...]\n"
 312         "    - show help information (for 'command')\n"
 313         "'help' prints online help for the monitor commands.\n\n"
 314         "Without arguments, it prints a short usage message for all commands.\n\n"
 315         "To get detailed help information for specific commands you can type\n"
 316         "'help' with one or more command names as arguments."
 317 );
 318
 319 /* This does not use the U_BOOT_CMD macro as ? can't be used in symbol names */
 320 #ifdef  CONFIG_SYS_LONGHELP
 321 cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
 322         "?",    CONFIG_SYS_MAXARGS,     1,      do_help,
 323         "alias for 'help'",
 324         ""
 325 };
 326 #else
 327 cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
 328         "?",    CONFIG_SYS_MAXARGS,     1,      do_help,
 329         "alias for 'help'"
 330 };
 331 #endif /* CONFIG_SYS_LONGHELP */
 332
 333 /***************************************************************************
 334  * find command table entry for a command
 335  */
 336 cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len)
 337 {
 338         cmd_tbl_t *cmdtp;
 339         cmd_tbl_t *cmdtp_temp = table;  /*Init value */
 340         const char *p;
 341         int len;
 342         int n_found = 0;
 343
 344         /*
 345          * Some commands allow length modifiers (like "cp.b");
 346          * compare command name only until first dot.
 347          */
 348         len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
 349
 350         for (cmdtp = table;
 351              cmdtp != table + table_len;
 352              cmdtp++) {
 353                 if (strncmp (cmd, cmdtp->name, len) == 0) {
 354                         if (len == strlen (cmdtp->name))
 355                                 return cmdtp;   /* full match */
 356
 357                         cmdtp_temp = cmdtp;     /* abbreviated command ? */
 358                         n_found++;
 359                 }
 360         }
 361         if (n_found == 1) {                     /* exactly one match */
 362                 return cmdtp_temp;
 363         }
 364
 365         return NULL;    /* not found or ambiguous command */
 366 }
 367
 368 cmd_tbl_t *find_cmd (const char *cmd)
 369 {
 370         int len = &__u_boot_cmd_end - &__u_boot_cmd_start;
 371         return find_cmd_tbl(cmd, &__u_boot_cmd_start, len);
 372 }
 373
 374 int cmd_usage(cmd_tbl_t *cmdtp)
 375 {
 376         printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
 377
 378 #ifdef  CONFIG_SYS_LONGHELP
 379         printf("Usage:\n%s ", cmdtp->name);
 380
 381         if (!cmdtp->help) {
 382                 puts ("- No additional help available.\n");
 383                 return 1;
 384         }
 385
 386         puts (cmdtp->help);
 387         putc ('\n');
 388 #endif  /* CONFIG_SYS_LONGHELP */
 389         return 0;
 390 }
 391
 392 #ifdef CONFIG_AUTO_COMPLETE
 393
 394 int var_complete(int argc, char *argv[], char last_char, int maxv, char *cmdv[])
 395 {
 396         static char tmp_buf[512];
 397         int space;
 398
 399         space = last_char == '\0' || last_char == ' ' || last_char == '\t';
 400
 401         if (space && argc == 1)
 402                 return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
 403
 404         if (!space && argc == 2)
 405                 return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
 406
 407         return 0;
 408 }
 409
 410 static void install_auto_complete_handler(const char *cmd,
 411                 int (*complete)(int argc, char *argv[], char last_char, int maxv, char *cmdv[]))
 412 {
 413         cmd_tbl_t *cmdtp;
 414
 415         cmdtp = find_cmd(cmd);
 416         if (cmdtp == NULL)
 417                 return;
 418
 419         cmdtp->complete = complete;
 420 }
 421
 422 void install_auto_complete(void)
 423 {
 424         install_auto_complete_handler("printenv", var_complete);
 425         install_auto_complete_handler("setenv", var_complete);
 426 #if defined(CONFIG_CMD_RUN)
 427         install_auto_complete_handler("run", var_complete);
 428 #endif
 429 }
 430
 431 /*************************************************************************************/
 432
 433 static int complete_cmdv(int argc, char *argv[], char last_char, int maxv, char *cmdv[])
 434 {
 435         cmd_tbl_t *cmdtp;
 436         const char *p;
 437         int len, clen;
 438         int n_found = 0;
 439         const char *cmd;
 440
 441         /* sanity? */
 442         if (maxv < 2)
 443                 return -2;
 444
 445         cmdv[0] = NULL;
 446
 447         if (argc == 0) {
 448                 /* output full list of commands */
 449                 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
 450                         if (n_found >= maxv - 2) {
 451                                 cmdv[n_found++] = "...";
 452                                 break;
 453                         }
 454                         cmdv[n_found++] = cmdtp->name;
 455                 }
 456                 cmdv[n_found] = NULL;
 457                 return n_found;
 458         }
 459
 460         /* more than one arg or one but the start of the next */
 461         if (argc > 1 || (last_char == '\0' || last_char == ' ' || last_char == '\t')) {
 462                 cmdtp = find_cmd(argv[0]);
 463                 if (cmdtp == NULL || cmdtp->complete == NULL) {
 464                         cmdv[0] = NULL;
 465                         return 0;
 466                 }
 467                 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
 468         }
 469
 470         cmd = argv[0];
 471         /*
 472          * Some commands allow length modifiers (like "cp.b");
 473          * compare command name only until first dot.
 474          */
 475         p = strchr(cmd, '.');
 476         if (p == NULL)
 477                 len = strlen(cmd);
 478         else
 479                 len = p - cmd;
 480
 481         /* return the partial matches */
 482         for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
 483
 484                 clen = strlen(cmdtp->name);
 485                 if (clen < len)
 486                         continue;
 487
 488                 if (memcmp(cmd, cmdtp->name, len) != 0)
 489                         continue;
 490
 491                 /* too many! */
 492                 if (n_found >= maxv - 2) {
 493                         cmdv[n_found++] = "...";
 494                         break;
 495                 }
 496
 497                 cmdv[n_found++] = cmdtp->name;
 498         }
 499
 500         cmdv[n_found] = NULL;
 501         return n_found;
 502 }
 503
 504 static int make_argv(char *s, int argvsz, char *argv[])
 505 {
 506         int argc = 0;
 507
 508         /* split into argv */
 509         while (argc < argvsz - 1) {
 510
 511                 /* skip any white space */
 512                 while ((*s == ' ') || (*s == '\t'))
 513                         ++s;
 514
 515                 if (*s == '\0') /* end of s, no more args       */
 516                         break;
 517
 518                 argv[argc++] = s;       /* begin of argument string     */
 519
 520                 /* find end of string */
 521                 while (*s && (*s != ' ') && (*s != '\t'))
 522                         ++s;
 523
 524                 if (*s == '\0')         /* end of s, no more args       */
 525                         break;
 526
 527                 *s++ = '\0';            /* terminate current arg         */
 528         }
 529         argv[argc] = NULL;
 530
 531         return argc;
 532 }
 533
 534 static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char *argv[])
 535 {
 536         int ll = leader != NULL ? strlen(leader) : 0;
 537         int sl = sep != NULL ? strlen(sep) : 0;
 538         int len, i;
 539
 540         if (banner) {
 541                 puts("\n");
 542                 puts(banner);
 543         }
 544
 545         i = linemax;    /* force leader and newline */
 546         while (*argv != NULL) {
 547                 len = strlen(*argv) + sl;
 548                 if (i + len >= linemax) {
 549                         puts("\n");
 550                         if (leader)
 551                                 puts(leader);
 552                         i = ll - sl;
 553                 } else if (sep)
 554                         puts(sep);
 555                 puts(*argv++);
 556                 i += len;
 557         }
 558         printf("\n");
 559 }
 560
 561 static int find_common_prefix(char *argv[])
 562 {
 563         int i, len;
 564         char *anchor, *s, *t;
 565
 566         if (*argv == NULL)
 567                 return 0;
 568
 569         /* begin with max */
 570         anchor = *argv++;
 571         len = strlen(anchor);
 572         while ((t = *argv++) != NULL) {
 573                 s = anchor;
 574                 for (i = 0; i < len; i++, t++, s++) {
 575                         if (*t != *s)
 576                                 break;
 577                 }
 578                 len = s - anchor;
 579         }
 580         return len;
 581 }
 582
 583 static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer   */
 584
 585 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
 586 {
 587         int n = *np, col = *colp;
 588         char *argv[CONFIG_SYS_MAXARGS + 1];             /* NULL terminated      */
 589         char *cmdv[20];
 590         char *s, *t;
 591         const char *sep;
 592         int i, j, k, len, seplen, argc;
 593         int cnt;
 594         char last_char;
 595
 596         if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
 597                 return 0;       /* not in normal console */
 598
 599         cnt = strlen(buf);
 600         if (cnt >= 1)
 601                 last_char = buf[cnt - 1];
 602         else
 603                 last_char = '\0';
 604
 605         /* copy to secondary buffer which will be affected */
 606         strcpy(tmp_buf, buf);
 607
 608         /* separate into argv */
 609         argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
 610
 611         /* do the completion and return the possible completions */
 612         i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
 613
 614         /* no match; bell and out */
 615         if (i == 0) {
 616                 if (argc > 1)   /* allow tab for non command */
 617                         return 0;
 618                 putc('\a');
 619                 return 1;
 620         }
 621
 622         s = NULL;
 623         len = 0;
 624         sep = NULL;
 625         seplen = 0;
 626         if (i == 1) { /* one match; perfect */
 627                 k = strlen(argv[argc - 1]);
 628                 s = cmdv[0] + k;
 629                 len = strlen(s);
 630                 sep = " ";
 631                 seplen = 1;
 632         } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) {      /* more */
 633                 k = strlen(argv[argc - 1]);
 634                 j -= k;
 635                 if (j > 0) {
 636                         s = cmdv[0] + k;
 637                         len = j;
 638                 }
 639         }
 640
 641         if (s != NULL) {
 642                 k = len + seplen;
 643                 /* make sure it fits */
 644                 if (n + k >= CONFIG_SYS_CBSIZE - 2) {
 645                         putc('\a');
 646                         return 1;
 647                 }
 648
 649                 t = buf + cnt;
 650                 for (i = 0; i < len; i++)
 651                         *t++ = *s++;
 652                 if (sep != NULL)
 653                         for (i = 0; i < seplen; i++)
 654                                 *t++ = sep[i];
 655                 *t = '\0';
 656                 n += k;
 657                 col += k;
 658                 puts(t - k);
 659                 if (sep == NULL)
 660                         putc('\a');
 661                 *np = n;
 662                 *colp = col;
 663         } else {
 664                 print_argv(NULL, "  ", " ", 78, cmdv);
 665
 666                 puts(prompt);
 667                 puts(buf);
 668         }
 669         return 1;
 670 }
 671
 672 #endif
 673
 674 #ifdef CMD_DATA_SIZE
 675 int cmd_get_data_size(char* arg, int default_size)
 676 {
 677         /* Check for a size specification .b, .w or .l.
 678          */
 679         int len = strlen(arg);
 680         if (len > 2 && arg[len-2] == '.') {
 681                 switch(arg[len-1]) {
 682                 case 'b':
 683                         return 1;
 684                 case 'w':
 685                         return 2;
 686                 case 'l':
 687                         return 4;
 688                 case 's':
 689                         return -2;
 690                 default:
 691                         return -1;
 692                 }
 693         }
 694         return default_size;
 695 }
 696 #endif