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  *    02-Apr-2004 (Magnus Olsen <magnus@greatlord.com>)
 127  *        Remove all hard code string so they can be
 128  *                translate to other langues.
 129  */
 130
 131 #include "precomp.h"
 132 #include "resource.h"
 133
 134 #ifdef INCLUDE_CMD_CHDIR
 135
 136 static LPTSTR lpLastPath;
 137
 138
 139 VOID InitLastPath (VOID)
 140 {
 141         lpLastPath = NULL;
 142 }
 143
 144
 145 VOID FreeLastPath (VOID)
 146 {
 147         if (lpLastPath)
 148                 free (lpLastPath);
 149 }
 150
 151 /*
 152  * CD / CHDIR
 153  *
 154  */
 155 INT cmd_chdir (LPTSTR cmd, LPTSTR param)
 156 {
 157         LPTSTR dir;             /* pointer to the directory to change to */
 158         LPTSTR lpOldPath;
 159         LPTSTR endofstring; /* pointer to the null character in the directory to change to */
 160         LPTSTR lastquote; /* pointer to the last quotation mark in the directory to change to */
 161
 162         /*Should we better declare a variable containing _tsclen(dir) ? It's used a few times,
 163           but on the other hand paths are generally not very long*/
 164
 165         if (!_tcsncmp (param, _T("/?"), 2))
 166         {
 167                 ConOutResPuts(STRING_CD_HELP);
 168                 return 0;
 169         }
 170
 171         /* The whole param string is our parameter these days. The only thing we do is eliminating every quotation mark */
 172         /* Is it safe to change the characters param is pointing to? I presume it is, as there doesn't seem to be any
 173         post-processing of it after the function call (what would that accomplish?) */
 174
 175         dir=param;
 176         endofstring=dir+_tcslen(dir);
 177
 178         while ((lastquote = _tcsrchr(dir, _T('\"'))))
 179         {
 180                 endofstring--;
 181                 memmove(lastquote,lastquote+1,endofstring-lastquote);
 182                 *endofstring=_T('\0');
 183         }
 184
 185         /* if doing a CD and no parameters given, print out current directory */
 186         if (!dir || !dir[0])
 187         {
 188                 TCHAR szPath[MAX_PATH];
 189
 190                 GetCurrentDirectory (MAX_PATH, szPath);
 191                 ConOutPuts (szPath);
 192                 return 0;
 193         }
 194
 195         if (dir && _tcslen (dir) == 1 && *dir == _T('-'))
 196         {
 197                 if (lpLastPath)
 198                         dir = lpLastPath;
 199                 else
 200                         return 0;
 201         }
 202         else if (dir && _tcslen (dir)==2 && dir[1] == _T(':'))
 203         {
 204                 TCHAR szRoot[3] = _T("A:");
 205                 TCHAR szPath[MAX_PATH];
 206
 207                 szRoot[0] = _totupper (dir[0]);
 208                 GetFullPathName (szRoot, MAX_PATH, szPath, NULL);
 209
 210                 /* PathRemoveBackslash */
 211                 if (_tcslen (szPath) > 3)
 212                 {
 213                         LPTSTR p = _tcsrchr (szPath, _T('\\'));
 214                         *p = _T('\0');
 215                 }
 216
 217                 ConOutPuts (szPath);
 218
 219
 220                 return 0;
 221         }
 222
 223         /* remove trailing \ if any, but ONLY if dir is not the root dir */
 224         if (_tcslen (dir) > 3 && dir[_tcslen (dir) - 1] == _T('\\'))
 225                 dir[_tcslen(dir) - 1] = _T('\0');
 226
 227
 228         /* store current directory */
 229         lpOldPath = (LPTSTR)malloc (MAX_PATH * sizeof(TCHAR));
 230         GetCurrentDirectory (MAX_PATH, lpOldPath);
 231
 232         if (!SetCurrentDirectory (dir))
 233         {
 234                 //ErrorMessage (GetLastError(), _T("CD"));
 235                 ConOutFormatMessage(GetLastError());
 236
 237                 /* throw away current directory */
 238                 free (lpOldPath);
 239                 lpOldPath = NULL;
 240
 241                 return 1;
 242         }
 243         else
 244         {
 245                 GetCurrentDirectory(MAX_PATH, dir);
 246                 if (dir[0]!=lpOldPath[0])
 247                 {
 248                         SetCurrentDirectory(lpOldPath);
 249                         free(lpOldPath);
 250                 }
 251                 else
 252                 {
 253                         if (lpLastPath)
 254                                 free (lpLastPath);
 255                         lpLastPath = lpOldPath;
 256                 }
 257         }
 258
 259
 260         return 0;
 261 }
 262 #endif
 263
 264
 265
 266 #ifdef INCLUDE_CMD_MKDIR
 267 /*
 268  * MD / MKDIR
 269  *
 270  */
 271 INT cmd_mkdir (LPTSTR cmd, LPTSTR param)
 272 {
 273         LPTSTR dir;             /* pointer to the directory to change to */
 274         LPTSTR place;   /* used to search for the \ when no space is used */
 275         LPTSTR *p = NULL;
 276         INT argc;
 277
 278         if (!_tcsncmp (param, _T("/?"), 2))
 279         {
 280                 ConOutResPuts(STRING_MKDIR_HELP);
 281                 return 0;
 282         }
 283
 284
 285         /* check if there is no space between the command and the path */
 286         if (param[0] == _T('\0'))
 287         {
 288                 /* search for the \ or . so that both short & long names will work */
 289                 for (place = cmd; *place; place++)
 290                         if (*place == _T('.') || *place == _T('\\'))
 291                                 break;
 292
 293                 if (*place)
 294                         dir = place;
 295                 else
 296                         /* signal that there are no parameters */
 297                         dir = NULL;
 298         }
 299         else
 300         {
 301                 p = split (param, &argc, FALSE);
 302                 if (argc > 1)
 303                 {
 304                         /*JPP 20-Jul-1998 use standard error message */
 305                         error_too_many_parameters (param);
 306                         freep (p);
 307                         return 1;
 308                 }
 309                 else
 310                         dir = p[0];
 311         }
 312
 313         if (!dir)
 314         {
 315                 ConErrResPuts (STRING_ERROR_REQ_PARAM_MISSING);
 316                 return 1;
 317         }
 318
 319         /* remove trailing \ if any, but ONLY if dir is not the root dir */
 320         if (_tcslen (dir) >= 2 && dir[_tcslen (dir) - 1] == _T('\\'))
 321                 dir[_tcslen(dir) - 1] = _T('\0');
 322
 323         if (!CreateDirectory (dir, NULL))
 324         {
 325                 ErrorMessage (GetLastError(), _T("MD"));
 326
 327                 freep (p);
 328                 return 1;
 329         }
 330
 331         freep (p);
 332
 333         return 0;
 334 }
 335 #endif
 336
 337
 338 #ifdef INCLUDE_CMD_RMDIR
 339 /*
 340  * RD / RMDIR
 341  *
 342  */
 343 INT cmd_rmdir (LPTSTR cmd, LPTSTR param)
 344 {
 345         LPTSTR dir;             /* pointer to the directory to change to */
 346         LPTSTR place;   /* used to search for the \ when no space is used */
 347
 348         LPTSTR *p = NULL;
 349         INT argc;
 350
 351         if (!_tcsncmp (param, _T("/?"), 2))
 352         {
 353                 ConOutResPuts(STRING_RMDIR_HELP);
 354                 return 0;
 355         }
 356
 357         /* check if there is no space between the command and the path */
 358         if (param[0] == _T('\0'))
 359         {
 360                 /* search for the \ or . so that both short & long names will work */
 361                 for (place = cmd; *place; place++)
 362                         if (*place == _T('.') || *place == _T('\\'))
 363                                 break;
 364
 365                 if (*place)
 366                         dir = place;
 367                 else
 368                         /* signal that there are no parameters */
 369                         dir = NULL;
 370         }
 371         else
 372         {
 373                 p = split (param, &argc, FALSE);
 374                 if (argc > 1)
 375                 {
 376                         /*JPP 20-Jul-1998 use standard error message */
 377                         error_too_many_parameters (param);
 378                         freep (p);
 379                         return 1;
 380                 }
 381                 else
 382                         dir = p[0];
 383         }
 384
 385         if (!dir)
 386         {
 387                 ConErrResPuts(STRING_ERROR_REQ_PARAM_MISSING);
 388                 return 1;
 389         }
 390
 391         /* remove trailing \ if any, but ONLY if dir is not the root dir */
 392         if (_tcslen (dir) >= 2 && dir[_tcslen (dir) - 1] == _T('\\'))
 393                 dir[_tcslen(dir) - 1] = _T('\0');
 394
 395         if (!RemoveDirectory (dir))
 396         {
 397                 ErrorMessage (GetLastError(), _T("RD"));
 398                 freep (p);
 399
 400                 return 1;
 401         }
 402
 403         freep (p);
 404
 405         return 0;
 406 }
 407 #endif
 408
 409
 410 /*
 411  * set the exitflag to true
 412  *
 413  */
 414 INT CommandExit (LPTSTR cmd, LPTSTR param)
 415 {
 416         if (!_tcsncmp (param, _T("/?"), 2))
 417         {
 418                 ConOutResPuts(STRING_EXIT_HELP);
 419                 return 0;
 420         }
 421
 422         bExit = TRUE;
 423         return 0;
 424 }
 425
 426
 427 #ifdef INCLUDE_CMD_REM
 428 /*
 429  * does nothing
 430  *
 431  */
 432 INT CommandRem (LPTSTR cmd, LPTSTR param)
 433 {
 434         if (!_tcsncmp (param, _T("/?"), 2))
 435         {
 436                 ConOutResPuts(STRING_REM_HELP);
 437         }
 438
 439         return 0;
 440 }
 441 #endif /* INCLUDE_CMD_REM */
 442
 443
 444 INT CommandShowCommands (LPTSTR cmd, LPTSTR param)
 445 {
 446         PrintCommandList ();
 447         return 0;
 448 }
 449
 450 /* EOF */