rosapps/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,'\"')))
 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
 251                 /* throw away current directory */
 252                 free (lpOldPath);
 253                 lpOldPath = NULL;
 254
 255                 return 1;
 256         }
 257         else
 258         {
 259                 GetCurrentDirectory(MAX_PATH, dir);
 260                 if (dir[0]!=lpOldPath[0])
 261                 {
 262                         SetCurrentDirectory(lpOldPath);
 263                         free(lpOldPath);
 264                 }
 265                 else
 266                 {
 267                         if (lpLastPath)
 268                                 free (lpLastPath);
 269                         lpLastPath = lpOldPath;
 270                 }
 271         }
 272
 273
 274         return 0;
 275 }
 276 #endif
 277
 278
 279
 280 #ifdef INCLUDE_CMD_MKDIR
 281 /*
 282  * MD / MKDIR
 283  *
 284  */
 285 INT cmd_mkdir (LPTSTR cmd, LPTSTR param)
 286 {
 287         LPTSTR dir;             /* pointer to the directory to change to */
 288         LPTSTR place;   /* used to search for the \ when no space is used */
 289         LPTSTR *p = NULL;
 290         INT argc;
 291
 292
 293         if (!_tcsncmp (param, _T("/?"), 2))
 294         {
 295                 ConOutPuts (_T("Creates a directory.\n\n"
 296                                            "MKDIR [drive:]path\nMD [drive:]path"));
 297                 return 0;
 298         }
 299
 300
 301         /* check if there is no space between the command and the path */
 302         if (param[0] == _T('\0'))
 303         {
 304                 /* search for the \ or . so that both short & long names will work */
 305                 for (place = cmd; *place; place++)
 306                         if (*place == _T('.') || *place == _T('\\'))
 307                                 break;
 308
 309                 if (*place)
 310                         dir = place;
 311                 else
 312                         /* signal that there are no parameters */
 313                         dir = NULL;
 314         }
 315         else
 316         {
 317                 p = split (param, &argc);
 318                 if (argc > 1)
 319                 {
 320                         /*JPP 20-Jul-1998 use standard error message */
 321                         error_too_many_parameters (param);
 322                         freep (p);
 323                         return 1;
 324                 }
 325                 else
 326                         dir = p[0];
 327         }
 328
 329         if (!dir)
 330         {
 331                 ConErrPrintf (_T("Required parameter missing\n"));
 332                 return 1;
 333         }
 334
 335         /* remove trailing \ if any, but ONLY if dir is not the root dir */
 336         if (_tcslen (dir) >= 2 && dir[_tcslen (dir) - 1] == _T('\\'))
 337                 dir[_tcslen(dir) - 1] = _T('\0');
 338
 339         if (!CreateDirectory (dir, NULL))
 340         {
 341                 ErrorMessage (GetLastError(), _T("MD"));
 342
 343                 freep (p);
 344                 return 1;
 345         }
 346
 347         freep (p);
 348
 349         return 0;
 350 }
 351 #endif
 352
 353
 354 #ifdef INCLUDE_CMD_RMDIR
 355 /*
 356  * RD / RMDIR
 357  *
 358  */
 359 INT cmd_rmdir (LPTSTR cmd, LPTSTR param)
 360 {
 361         LPTSTR dir;             /* pointer to the directory to change to */
 362         LPTSTR place;   /* used to search for the \ when no space is used */
 363
 364         LPTSTR *p = NULL;
 365         INT argc;
 366
 367         if (!_tcsncmp (param, _T("/?"), 2))
 368         {
 369                 ConOutPuts (_T("Removes a directory.\n\n"
 370                                            "RMDIR [drive:]path\nRD [drive:]path"));
 371                 return 0;
 372         }
 373
 374         /* check if there is no space between the command and the path */
 375         if (param[0] == _T('\0'))
 376         {
 377                 /* search for the \ or . so that both short & long names will work */
 378                 for (place = cmd; *place; place++)
 379                         if (*place == _T('.') || *place == _T('\\'))
 380                                 break;
 381
 382                 if (*place)
 383                         dir = place;
 384                 else
 385                         /* signal that there are no parameters */
 386                         dir = NULL;
 387         }
 388         else
 389         {
 390                 p = split (param, &argc);
 391                 if (argc > 1)
 392                 {
 393                         /*JPP 20-Jul-1998 use standard error message */
 394                         error_too_many_parameters (param);
 395                         freep (p);
 396                         return 1;
 397                 }
 398                 else
 399                         dir = p[0];
 400         }
 401
 402         if (!dir)
 403         {
 404                 ConErrPrintf (_T("Required parameter missing\n"));
 405                 return 1;
 406         }
 407
 408         /* remove trailing \ if any, but ONLY if dir is not the root dir */
 409         if (_tcslen (dir) >= 2 && dir[_tcslen (dir) - 1] == _T('\\'))
 410                 dir[_tcslen(dir) - 1] = _T('\0');
 411
 412         if (!RemoveDirectory (dir))
 413         {
 414                 ErrorMessage (GetLastError(), _T("RD"));
 415                 freep (p);
 416
 417                 return 1;
 418         }
 419
 420         freep (p);
 421
 422         return 0;
 423 }
 424 #endif
 425
 426
 427 /*
 428  * set the exitflag to true
 429  *
 430  */
 431 INT CommandExit (LPTSTR cmd, LPTSTR param)
 432 {
 433         if (!_tcsncmp (param, _T("/?"), 2))
 434         {
 435                 ConOutPuts (_T("Exits the command line interpreter.\n\nEXIT"));
 436                 return 0;
 437         }
 438
 439         bExit = TRUE;
 440         return 0;
 441 }
 442
 443
 444 #ifdef INCLUDE_CMD_REM
 445 /*
 446  * does nothing
 447  *
 448  */
 449 INT CommandRem (LPTSTR cmd, LPTSTR param)
 450 {
 451         if (!_tcsncmp (param, _T("/?"), 2))
 452         {
 453                 ConOutPuts (_T("Starts a comment line in a batch file.\n\n"
 454                                "REM [Comment]"));
 455         }
 456
 457         return 0;
 458 }
 459 #endif /* INCLUDE_CMD_REM */
 460
 461
 462 INT CommandShowCommands (LPTSTR cmd, LPTSTR param)
 463 {
 464         PrintCommandList ();
 465         return 0;
 466 }
 467
 468 /* EOF */