reactos/subsys/system/cmd/internal.c

   1 /*
   2  *  INTERNAL.C - command.com internal commands.
   3  *
   4  *
   5  *  History:
   6  *
   7  *  17/08/94 (Tim Norman)
   8  *    started.
   9  *
  10  *  08/08/95 (Matt Rains)
  11  *    i have cleaned up the source code. changes now bring this source into
  12  *    guidelines for recommended programming practice.
  13  *
  14  *  cd()
  15  *    started.
  16  *
  17  *  dir()
  18  *    i have added support for file attributes to the DIR() function. the
  19  *    routine adds "d" (directory) and "r" (read only) output. files with the
  20  *    system attribute have the filename converted to lowercase. files with
  21  *    the hidden attribute are not displayed.
  22  *
  23  *    i have added support for directorys. now if the directory attribute is
  24  *    detected the file size if replaced with the string "<dir>".
  25  *
  26  *  ver()
  27  *    started.
  28  *
  29  *  md()
  30  *    started.
  31  *
  32  *  rd()
  33  *    started.
  34  *
  35  *  del()
  36  *    started.
  37  *
  38  *  does not support wildcard selection.
  39  *
  40  *  todo: add delete directory support.
  41  *        add recursive directory delete support.
  42  *
  43  *  ren()
  44  *    started.
  45  *
  46  *  does not support wildcard selection.
  47  *
  48  *    todo: add rename directory support.
  49  *
  50  *  a general structure has been used for the cd, rd and md commands. this
  51  *  will be better in the long run. it is too hard to maintain such diverse
  52  *  functions when you are involved in a group project like this.
  53  *
  54  *  12/14/95 (Tim Norman)
  55  *    fixed DIR so that it will stick \*.* if a directory is specified and
  56  *    that it will stick on .* if a file with no extension is specified or
  57  *    *.* if it ends in a \
  58  *
  59  *  1/6/96 (Tim Norman)
  60  *    added an isatty call to DIR so it won't prompt for keypresses unless
  61  *    stdin and stdout are the console.
  62  *
  63  *    changed parameters to be mutually consistent to make calling the
  64  *    functions easier
  65  *
  66  *  rem()
  67  *    started.
  68  *
  69  *  doskey()
  70  *    started.
  71  *
  72  *    01/22/96 (Oliver Mueller)
  73  *        error messages are now handled by perror.
  74  *
  75  *    02/05/96 (Tim Norman)
  76  *        converted all functions to accept first/rest parameters
  77  *
  78  *    07/26/96 (Tim Norman)
  79  *        changed return values to int instead of void
  80  *
  81  *        path() started.
  82  *
  83  *    12/23/96 (Aaron Kaufman)
  84  *        rewrote dir() to mimic MS-DOS's dir
  85  *
  86  *    01/28/97 (Tim Norman)
  87  *        cleaned up Aaron's DIR code
  88  *
  89  *    06/13/97 (Tim Norman)
  90  *        moved DIR code to dir.c
  91  *        re-implemented Aaron's DIR code
  92  *
  93  *    06/14/97 (Steffan Kaiser)
  94  *        ctrl-break handling
  95  *        bug fixes
  96  *
  97  *    27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
  98  *        added config.h include
  99  *
 100  *    03-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
 101  *        Replaced DOS calls by Win32 calls.
 102  *
 103  *    08-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
 104  *        Added help texts ("/?").
 105  *
 106  *    18-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
 107  *        Added support for quoted arguments (cd "program files").
 108  *
 109  *    07-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
 110  *        Clean up.
 111  *
 112  *    26-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
 113  *        Replaced remaining CRT io functions by Win32 io functions.
 114  *        Unicode safe!
 115  *
 116  *    30-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
 117  *        Added "cd -" feature. Changes to the previous directory.
 118  *
 119  *    15-Mar-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
 120  *        Fixed bug in "cd -" feature. If the previous directory was a root
 121  *        directory, it was ignored.
 122  *
 123  *    23-Feb-2001 (Carl Nettelblad <cnettel@hem.passagen.se>)
 124  *        Improved chdir/cd command.
 125  */
 126
 127 #include "config.h"
 128
 129 #include <windows.h>
 130 #include <tchar.h>
 131 #include <string.h>
 132 #include <stdlib.h>
 133 #include <ctype.h>
 134
 135 #include "cmd.h"
 136
 137
 138 #ifdef INCLUDE_CMD_CHDIR
 139
 140 static LPTSTR lpLastPath;
 141
 142
 143 VOID InitLastPath (VOID)
 144 {
 145         lpLastPath = NULL;
 146 }
 147
 148
 149 VOID FreeLastPath (VOID)
 150 {
 151         if (lpLastPath)
 152                 free (lpLastPath);
 153 }
 154
 155 /*
 156  * CD / CHDIR
 157  *
 158  */
 159 INT cmd_chdir (LPTSTR cmd, LPTSTR param)
 160 {
 161         LPTSTR dir;             /* pointer to the directory to change to */
 162         LPTSTR lpOldPath;
 163         LPTSTR endofstring; /* pointer to the null character in the directory to change to */
 164         LPTSTR lastquote; /* pointer to the last quotation mark in the directory to change to */
 165
 166         /*Should we better declare a variable containing _tsclen(dir) ? It's used a few times,
 167           but on the other hand paths are generally not very long*/
 168
 169         if (!_tcsncmp (param, _T("/?"), 2))
 170         {
 171                 ConOutPuts (_T("Changes the current directory or displays it's name\n\n"
 172                                            "CHDIR [drive:][path]\n"
 173                                            "CHDIR[..|-]\n"
 174                                            "CD [drive:][path]\n"
 175                                            "CD[..|-]\n\n"
 176                                            "  ..   parent directory\n"
 177                                            "  -    previous directory\n\n"
 178                                            "Type CD drive: to display the current directory on the specified drive.\n"
 179                                            "Type CD without a parameter to display the current drive and directory."));
 180                 return 0;
 181         }
 182
 183         /* The whole param string is our parameter these days. The only thing we do is eliminating every quotation mark */
 184         /* Is it safe to change the characters param is pointing to? I presume it is, as there doesn't seem to be any
 185         post-processing of it after the function call (what would that accomplish?) */
 186
 187         dir=param;
 188         endofstring=dir+_tcslen(dir);
 189
 190         while ((lastquote = _tcsrchr(dir, _T('\"'))))
 191         {
 192                 endofstring--;
 193                 memmove(lastquote,lastquote+1,endofstring-lastquote);
 194                 *endofstring=_T('\0');
 195         }
 196
 197         /* if doing a CD and no parameters given, print out current directory */
 198         if (!dir || !dir[0])
 199         {
 200                 TCHAR szPath[MAX_PATH];
 201
 202                 GetCurrentDirectory (MAX_PATH, szPath);
 203
 204                 ConOutPuts (szPath);
 205
 206
 207                 return 0;
 208         }
 209
 210         if (dir && _tcslen (dir) == 1 && *dir == _T('-'))
 211         {
 212                 if (lpLastPath)
 213                         dir = lpLastPath;
 214                 else
 215                         return 0;
 216         }
 217         else if (dir && _tcslen (dir)==2 && dir[1] == _T(':'))
 218         {
 219                 TCHAR szRoot[3] = _T("A:");
 220                 TCHAR szPath[MAX_PATH];
 221
 222                 szRoot[0] = _totupper (dir[0]);
 223                 GetFullPathName (szRoot, MAX_PATH, szPath, NULL);
 224
 225                 /* PathRemoveBackslash */
 226                 if (_tcslen (szPath) > 3)
 227                 {
 228                         LPTSTR p = _tcsrchr (szPath, _T('\\'));
 229                         *p = _T('\0');
 230                 }
 231
 232                 ConOutPuts (szPath);
 233
 234
 235                 return 0;
 236         }
 237
 238         /* remove trailing \ if any, but ONLY if dir is not the root dir */
 239         if (_tcslen (dir) > 3 && dir[_tcslen (dir) - 1] == _T('\\'))
 240                 dir[_tcslen(dir) - 1] = _T('\0');
 241
 242
 243         /* store current directory */
 244         lpOldPath = (LPTSTR)malloc (MAX_PATH * sizeof(TCHAR));
 245         GetCurrentDirectory (MAX_PATH, lpOldPath);
 246
 247         if (!SetCurrentDirectory (dir))
 248         {
 249                 //ErrorMessage (GetLastError(), _T("CD"));
 250                 ConOutFormatMessage(GetLastError());
 251
 252                 /* throw away current directory */
 253                 free (lpOldPath);
 254                 lpOldPath = NULL;
 255
 256                 return 1;
 257         }
 258         else
 259         {
 260                 GetCurrentDirectory(MAX_PATH, dir);
 261                 if (dir[0]!=lpOldPath[0])
 262                 {
 263                         SetCurrentDirectory(lpOldPath);
 264                         free(lpOldPath);
 265                 }
 266                 else
 267                 {
 268                         if (lpLastPath)
 269                                 free (lpLastPath);
 270                         lpLastPath = lpOldPath;
 271                 }
 272         }
 273
 274
 275         return 0;
 276 }
 277 #endif
 278
 279
 280
 281 #ifdef INCLUDE_CMD_MKDIR
 282 /*
 283  * MD / MKDIR
 284  *
 285  */
 286 INT cmd_mkdir (LPTSTR cmd, LPTSTR param)
 287 {
 288         LPTSTR dir;             /* pointer to the directory to change to */
 289         LPTSTR place;   /* used to search for the \ when no space is used */
 290         LPTSTR *p = NULL;
 291         INT argc;
 292
 293
 294         if (!_tcsncmp (param, _T("/?"), 2))
 295         {
 296                 ConOutPuts (_T("Creates a directory.\n\n"
 297                                            "MKDIR [drive:]path\nMD [drive:]path"));
 298                 return 0;
 299         }
 300
 301
 302         /* check if there is no space between the command and the path */
 303         if (param[0] == _T('\0'))
 304         {
 305                 /* search for the \ or . so that both short & long names will work */
 306                 for (place = cmd; *place; place++)
 307                         if (*place == _T('.') || *place == _T('\\'))
 308                                 break;
 309
 310                 if (*place)
 311                         dir = place;
 312                 else
 313                         /* signal that there are no parameters */
 314                         dir = NULL;
 315         }
 316         else
 317         {
 318                 p = split (param, &argc, FALSE);
 319                 if (argc > 1)
 320                 {
 321                         /*JPP 20-Jul-1998 use standard error message */
 322                         error_too_many_parameters (param);
 323                         freep (p);
 324                         return 1;
 325                 }
 326                 else
 327                         dir = p[0];
 328         }
 329
 330         if (!dir)
 331         {
 332                 ConErrPrintf (_T("Required parameter missing\n"));
 333                 return 1;
 334         }
 335
 336         /* remove trailing \ if any, but ONLY if dir is not the root dir */
 337         if (_tcslen (dir) >= 2 && dir[_tcslen (dir) - 1] == _T('\\'))
 338                 dir[_tcslen(dir) - 1] = _T('\0');
 339
 340         if (!CreateDirectory (dir, NULL))
 341         {
 342                 ErrorMessage (GetLastError(), _T("MD"));
 343
 344                 freep (p);
 345                 return 1;
 346         }
 347
 348         freep (p);
 349
 350         return 0;
 351 }
 352 #endif
 353
 354
 355 #ifdef INCLUDE_CMD_RMDIR
 356 /*
 357  * RD / RMDIR
 358  *
 359  */
 360 INT cmd_rmdir (LPTSTR cmd, LPTSTR param)
 361 {
 362         LPTSTR dir;             /* pointer to the directory to change to */
 363         LPTSTR place;   /* used to search for the \ when no space is used */
 364
 365         LPTSTR *p = NULL;
 366         INT argc;
 367
 368         if (!_tcsncmp (param, _T("/?"), 2))
 369         {
 370                 ConOutPuts (_T("Removes a directory.\n\n"
 371                                            "RMDIR [drive:]path\nRD [drive:]path"));
 372                 return 0;
 373         }
 374
 375         /* check if there is no space between the command and the path */
 376         if (param[0] == _T('\0'))
 377         {
 378                 /* search for the \ or . so that both short & long names will work */
 379                 for (place = cmd; *place; place++)
 380                         if (*place == _T('.') || *place == _T('\\'))
 381                                 break;
 382
 383                 if (*place)
 384                         dir = place;
 385                 else
 386                         /* signal that there are no parameters */
 387                         dir = NULL;
 388         }
 389         else
 390         {
 391                 p = split (param, &argc, FALSE);
 392                 if (argc > 1)
 393                 {
 394                         /*JPP 20-Jul-1998 use standard error message */
 395                         error_too_many_parameters (param);
 396                         freep (p);
 397                         return 1;
 398                 }
 399                 else
 400                         dir = p[0];
 401         }
 402
 403         if (!dir)
 404         {
 405                 ConErrPrintf (_T("Required parameter missing\n"));
 406                 return 1;
 407         }
 408
 409         /* remove trailing \ if any, but ONLY if dir is not the root dir */
 410         if (_tcslen (dir) >= 2 && dir[_tcslen (dir) - 1] == _T('\\'))
 411                 dir[_tcslen(dir) - 1] = _T('\0');
 412
 413         if (!RemoveDirectory (dir))
 414         {
 415                 ErrorMessage (GetLastError(), _T("RD"));
 416                 freep (p);
 417
 418                 return 1;
 419         }
 420
 421         freep (p);
 422
 423         return 0;
 424 }
 425 #endif
 426
 427
 428 /*
 429  * set the exitflag to true
 430  *
 431  */
 432 INT CommandExit (LPTSTR cmd, LPTSTR param)
 433 {
 434         if (!_tcsncmp (param, _T("/?"), 2))
 435         {
 436                 ConOutPuts (_T("Exits the command line interpreter.\n\nEXIT"));
 437                 return 0;
 438         }
 439
 440         bExit = TRUE;
 441         return 0;
 442 }
 443
 444
 445 #ifdef INCLUDE_CMD_REM
 446 /*
 447  * does nothing
 448  *
 449  */
 450 INT CommandRem (LPTSTR cmd, LPTSTR param)
 451 {
 452         if (!_tcsncmp (param, _T("/?"), 2))
 453         {
 454                 ConOutPuts (_T("Starts a comment line in a batch file.\n\n"
 455                                "REM [Comment]"));
 456         }
 457
 458         return 0;
 459 }
 460 #endif /* INCLUDE_CMD_REM */
 461
 462
 463 INT CommandShowCommands (LPTSTR cmd, LPTSTR param)
 464 {
 465         PrintCommandList ();
 466         return 0;
 467 }
 468
 469 /* EOF */