common/command.c

   1 /*
   2  * (C) Copyright 2000-2003
   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         "version - print monitor version\n",
  42         NULL
  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,   CFG_MAXARGS,    1,      do_echo,
  74         "echo    - echo args to console\n",
  75         "[args..]\n"
  76         "    - echo args to console; \\c suppresses newline\n"
  77 );
  78
  79 #endif
  80
  81 #ifdef CFG_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,   CFG_MAXARGS,    1,      do_test,
 206         "test    - minimal test like /bin/sh\n",
 207         "[args..]\n"
 208         "    - test functionality\n"
 209 );
 210
 211 int
 212 do_exit (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 213 {
 214         int r;
 215
 216         r = 0;
 217         if (argc > 1)
 218                 r = simple_strtoul(argv[1], NULL, 10);
 219
 220         return -r - 2;
 221 }
 222
 223 U_BOOT_CMD(
 224         exit,   2,      1,      do_exit,
 225         "exit    - exit script\n",
 226         "    - exit functionality\n"
 227 );
 228
 229
 230 #endif
 231
 232 /*
 233  * Use puts() instead of printf() to avoid printf buffer overflow
 234  * for long help messages
 235  */
 236 int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 237 {
 238         int i;
 239         int rcode = 0;
 240
 241         if (argc == 1) {        /*show list of commands */
 242
 243                 int cmd_items = &__u_boot_cmd_end -
 244                                 &__u_boot_cmd_start;    /* pointer arith! */
 245                 cmd_tbl_t *cmd_array[cmd_items];
 246                 int i, j, swaps;
 247
 248                 /* Make array of commands from .uboot_cmd section */
 249                 cmdtp = &__u_boot_cmd_start;
 250                 for (i = 0; i < cmd_items; i++) {
 251                         cmd_array[i] = cmdtp++;
 252                 }
 253
 254                 /* Sort command list (trivial bubble sort) */
 255                 for (i = cmd_items - 1; i > 0; --i) {
 256                         swaps = 0;
 257                         for (j = 0; j < i; ++j) {
 258                                 if (strcmp (cmd_array[j]->name,
 259                                             cmd_array[j + 1]->name) > 0) {
 260                                         cmd_tbl_t *tmp;
 261                                         tmp = cmd_array[j];
 262                                         cmd_array[j] = cmd_array[j + 1];
 263                                         cmd_array[j + 1] = tmp;
 264                                         ++swaps;
 265                                 }
 266                         }
 267                         if (!swaps)
 268                                 break;
 269                 }
 270
 271                 /* print short help (usage) */
 272                 for (i = 0; i < cmd_items; i++) {
 273                         const char *usage = cmd_array[i]->usage;
 274
 275                         /* allow user abort */
 276                         if (ctrlc ())
 277                                 return 1;
 278                         if (usage == NULL)
 279                                 continue;
 280                         puts (usage);
 281                 }
 282                 return 0;
 283         }
 284         /*
 285          * command help (long version)
 286          */
 287         for (i = 1; i < argc; ++i) {
 288                 if ((cmdtp = find_cmd (argv[i])) != NULL) {
 289 #ifdef  CFG_LONGHELP
 290                         /* found - print (long) help info */
 291                         puts (cmdtp->name);
 292                         putc (' ');
 293                         if (cmdtp->help) {
 294                                 puts (cmdtp->help);
 295                         } else {
 296                                 puts ("- No help available.\n");
 297                                 rcode = 1;
 298                         }
 299                         putc ('\n');
 300 #else   /* no long help available */
 301                         if (cmdtp->usage)
 302                                 puts (cmdtp->usage);
 303 #endif  /* CFG_LONGHELP */
 304                 } else {
 305                         printf ("Unknown command '%s' - try 'help'"
 306                                 " without arguments for list of all"
 307                                 " known commands\n\n", argv[i]
 308                                         );
 309                         rcode = 1;
 310                 }
 311         }
 312         return rcode;
 313 }
 314
 315
 316 U_BOOT_CMD(
 317         help,   CFG_MAXARGS,    1,      do_help,
 318         "help    - print online help\n",
 319         "[command ...]\n"
 320         "    - show help information (for 'command')\n"
 321         "'help' prints online help for the monitor commands.\n\n"
 322         "Without arguments, it prints a short usage message for all commands.\n\n"
 323         "To get detailed help information for specific commands you can type\n"
 324   "'help' with one or more command names as arguments.\n"
 325 );
 326
 327 /* This do not ust the U_BOOT_CMD macro as ? can't be used in symbol names */
 328 #ifdef  CFG_LONGHELP
 329 cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
 330         "?",    CFG_MAXARGS,    1,      do_help,
 331         "?       - alias for 'help'\n",
 332         NULL
 333 };
 334 #else
 335 cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
 336         "?",    CFG_MAXARGS,    1,      do_help,
 337         "?       - alias for 'help'\n"
 338 };
 339 #endif /* CFG_LONGHELP */
 340
 341 /***************************************************************************
 342  * find command table entry for a command
 343  */
 344 cmd_tbl_t *find_cmd (const char *cmd)
 345 {
 346         cmd_tbl_t *cmdtp;
 347         cmd_tbl_t *cmdtp_temp = &__u_boot_cmd_start;    /*Init value */
 348         const char *p;
 349         int len;
 350         int n_found = 0;
 351
 352         /*
 353          * Some commands allow length modifiers (like "cp.b");
 354          * compare command name only until first dot.
 355          */
 356         len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
 357
 358         for (cmdtp = &__u_boot_cmd_start;
 359              cmdtp != &__u_boot_cmd_end;
 360              cmdtp++) {
 361                 if (strncmp (cmd, cmdtp->name, len) == 0) {
 362                         if (len == strlen (cmdtp->name))
 363                                 return cmdtp;   /* full match */
 364
 365                         cmdtp_temp = cmdtp;     /* abbreviated command ? */
 366                         n_found++;
 367                 }
 368         }
 369         if (n_found == 1) {                     /* exactly one match */
 370                 return cmdtp_temp;
 371         }
 372
 373         return NULL;    /* not found or ambiguous command */
 374 }
 375
 376 #ifdef CONFIG_AUTO_COMPLETE
 377
 378 int var_complete(int argc, char *argv[], char last_char, int maxv, char *cmdv[])
 379 {
 380         static char tmp_buf[512];
 381         int space;
 382
 383         space = last_char == '\0' || last_char == ' ' || last_char == '\t';
 384
 385         if (space && argc == 1)
 386                 return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
 387
 388         if (!space && argc == 2)
 389                 return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
 390
 391         return 0;
 392 }
 393
 394 static void install_auto_complete_handler(const char *cmd,
 395                 int (*complete)(int argc, char *argv[], char last_char, int maxv, char *cmdv[]))
 396 {
 397         cmd_tbl_t *cmdtp;
 398
 399         cmdtp = find_cmd(cmd);
 400         if (cmdtp == NULL)
 401                 return;
 402
 403         cmdtp->complete = complete;
 404 }
 405
 406 void install_auto_complete(void)
 407 {
 408         install_auto_complete_handler("printenv", var_complete);
 409         install_auto_complete_handler("setenv", var_complete);
 410 #if defined(CONFIG_CMD_RUN)
 411         install_auto_complete_handler("run", var_complete);
 412 #endif
 413 }
 414
 415 /*************************************************************************************/
 416
 417 static int complete_cmdv(int argc, char *argv[], char last_char, int maxv, char *cmdv[])
 418 {
 419         cmd_tbl_t *cmdtp;
 420         const char *p;
 421         int len, clen;
 422         int n_found = 0;
 423         const char *cmd;
 424
 425         /* sanity? */
 426         if (maxv < 2)
 427                 return -2;
 428
 429         cmdv[0] = NULL;
 430
 431         if (argc == 0) {
 432                 /* output full list of commands */
 433                 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
 434                         if (n_found >= maxv - 2) {
 435                                 cmdv[n_found++] = "...";
 436                                 break;
 437                         }
 438                         cmdv[n_found++] = cmdtp->name;
 439                 }
 440                 cmdv[n_found] = NULL;
 441                 return n_found;
 442         }
 443
 444         /* more than one arg or one but the start of the next */
 445         if (argc > 1 || (last_char == '\0' || last_char == ' ' || last_char == '\t')) {
 446                 cmdtp = find_cmd(argv[0]);
 447                 if (cmdtp == NULL || cmdtp->complete == NULL) {
 448                         cmdv[0] = NULL;
 449                         return 0;
 450                 }
 451                 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
 452         }
 453
 454         cmd = argv[0];
 455         /*
 456          * Some commands allow length modifiers (like "cp.b");
 457          * compare command name only until first dot.
 458          */
 459         p = strchr(cmd, '.');
 460         if (p == NULL)
 461                 len = strlen(cmd);
 462         else
 463                 len = p - cmd;
 464
 465         /* return the partial matches */
 466         for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
 467
 468                 clen = strlen(cmdtp->name);
 469                 if (clen < len)
 470                         continue;
 471
 472                 if (memcmp(cmd, cmdtp->name, len) != 0)
 473                         continue;
 474
 475                 /* too many! */
 476                 if (n_found >= maxv - 2) {
 477                         cmdv[n_found++] = "...";
 478                         break;
 479                 }
 480
 481                 cmdv[n_found++] = cmdtp->name;
 482         }
 483
 484         cmdv[n_found] = NULL;
 485         return n_found;
 486 }
 487
 488 static int make_argv(char *s, int argvsz, char *argv[])
 489 {
 490         int argc = 0;
 491
 492         /* split into argv */
 493         while (argc < argvsz - 1) {
 494
 495                 /* skip any white space */
 496                 while ((*s == ' ') || (*s == '\t'))
 497                         ++s;
 498
 499                 if (*s == '\0') /* end of s, no more args       */
 500                         break;
 501
 502                 argv[argc++] = s;       /* begin of argument string     */
 503
 504                 /* find end of string */
 505                 while (*s && (*s != ' ') && (*s != '\t'))
 506                         ++s;
 507
 508                 if (*s == '\0')         /* end of s, no more args       */
 509                         break;
 510
 511                 *s++ = '\0';            /* terminate current arg         */
 512         }
 513         argv[argc] = NULL;
 514
 515         return argc;
 516 }
 517
 518 static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char *argv[])
 519 {
 520         int ll = leader != NULL ? strlen(leader) : 0;
 521         int sl = sep != NULL ? strlen(sep) : 0;
 522         int len, i;
 523
 524         if (banner) {
 525                 puts("\n");
 526                 puts(banner);
 527         }
 528
 529         i = linemax;    /* force leader and newline */
 530         while (*argv != NULL) {
 531                 len = strlen(*argv) + sl;
 532                 if (i + len >= linemax) {
 533                         puts("\n");
 534                         if (leader)
 535                                 puts(leader);
 536                         i = ll - sl;
 537                 } else if (sep)
 538                         puts(sep);
 539                 puts(*argv++);
 540                 i += len;
 541         }
 542         printf("\n");
 543 }
 544
 545 static int find_common_prefix(char *argv[])
 546 {
 547         int i, len;
 548         char *anchor, *s, *t;
 549
 550         if (*argv == NULL)
 551                 return 0;
 552
 553         /* begin with max */
 554         anchor = *argv++;
 555         len = strlen(anchor);
 556         while ((t = *argv++) != NULL) {
 557                 s = anchor;
 558                 for (i = 0; i < len; i++, t++, s++) {
 559                         if (*t != *s)
 560                                 break;
 561                 }
 562                 len = s - anchor;
 563         }
 564         return len;
 565 }
 566
 567 static char tmp_buf[CFG_CBSIZE];        /* copy of console I/O buffer   */
 568
 569 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
 570 {
 571         int n = *np, col = *colp;
 572         char *argv[CFG_MAXARGS + 1];            /* NULL terminated      */
 573         char *cmdv[20];
 574         char *s, *t;
 575         const char *sep;
 576         int i, j, k, len, seplen, argc;
 577         int cnt;
 578         char last_char;
 579
 580         if (strcmp(prompt, CFG_PROMPT) != 0)
 581                 return 0;       /* not in normal console */
 582
 583         cnt = strlen(buf);
 584         if (cnt >= 1)
 585                 last_char = buf[cnt - 1];
 586         else
 587                 last_char = '\0';
 588
 589         /* copy to secondary buffer which will be affected */
 590         strcpy(tmp_buf, buf);
 591
 592         /* separate into argv */
 593         argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
 594
 595         /* do the completion and return the possible completions */
 596         i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
 597
 598         /* no match; bell and out */
 599         if (i == 0) {
 600                 if (argc > 1)   /* allow tab for non command */
 601                         return 0;
 602                 putc('\a');
 603                 return 1;
 604         }
 605
 606         s = NULL;
 607         len = 0;
 608         sep = NULL;
 609         seplen = 0;
 610         if (i == 1) { /* one match; perfect */
 611                 k = strlen(argv[argc - 1]);
 612                 s = cmdv[0] + k;
 613                 len = strlen(s);
 614                 sep = " ";
 615                 seplen = 1;
 616         } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) {      /* more */
 617                 k = strlen(argv[argc - 1]);
 618                 j -= k;
 619                 if (j > 0) {
 620                         s = cmdv[0] + k;
 621                         len = j;
 622                 }
 623         }
 624
 625         if (s != NULL) {
 626                 k = len + seplen;
 627                 /* make sure it fits */
 628                 if (n + k >= CFG_CBSIZE - 2) {
 629                         putc('\a');
 630                         return 1;
 631                 }
 632
 633                 t = buf + cnt;
 634                 for (i = 0; i < len; i++)
 635                         *t++ = *s++;
 636                 if (sep != NULL)
 637                         for (i = 0; i < seplen; i++)
 638                                 *t++ = sep[i];
 639                 *t = '\0';
 640                 n += k;
 641                 col += k;
 642                 puts(t - k);
 643                 if (sep == NULL)
 644                         putc('\a');
 645                 *np = n;
 646                 *colp = col;
 647         } else {
 648                 print_argv(NULL, "  ", " ", 78, cmdv);
 649
 650                 puts(prompt);
 651                 puts(buf);
 652         }
 653         return 1;
 654 }
 655
 656 #endif