dlls/kernel/path.c

   1 /*
   2  * File handling functions
   3  *
   4  * Copyright 1993 Erik Bos
   5  * Copyright 1996 Alexandre Julliard
   6  * Copyright 2003 Eric Pouech
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library 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 GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include "config.h"
  25 #include "wine/port.h"
  26
  27 #include <stdarg.h>
  28
  29 #define NONAMELESSUNION
  30 #define NONAMELESSSTRUCT
  31 #include "winerror.h"
  32 #include "ntstatus.h"
  33 #include "windef.h"
  34 #include "winbase.h"
  35 #include "winreg.h"
  36 #include "winternl.h"
  37
  38 #include "wine/unicode.h"
  39 #include "wine/debug.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(file);
  42
  43 #define MAX_PATHNAME_LEN        1024
  44
  45 /***********************************************************************
  46  *           GetFullPathNameW   (KERNEL32.@)
  47  * NOTES
  48  *   if the path closed with '\', *lastpart is 0
  49  */
  50 DWORD WINAPI GetFullPathNameW( LPCWSTR name, DWORD len, LPWSTR buffer,
  51                                LPWSTR *lastpart )
  52 {
  53     return RtlGetFullPathName_U(name, len * sizeof(WCHAR), buffer, lastpart) / sizeof(WCHAR);
  54 }
  55
  56 /***********************************************************************
  57  *           GetFullPathNameA   (KERNEL32.@)
  58  * NOTES
  59  *   if the path closed with '\', *lastpart is 0
  60  */
  61 DWORD WINAPI GetFullPathNameA( LPCSTR name, DWORD len, LPSTR buffer,
  62                                LPSTR *lastpart )
  63 {
  64     UNICODE_STRING nameW;
  65     WCHAR bufferW[MAX_PATH];
  66     DWORD ret, retW;
  67
  68     if (!name)
  69     {
  70         SetLastError(ERROR_INVALID_PARAMETER);
  71         return 0;
  72     }
  73
  74     if (!RtlCreateUnicodeStringFromAsciiz(&nameW, name))
  75     {
  76         SetLastError(ERROR_NOT_ENOUGH_MEMORY);
  77         return 0;
  78     }
  79
  80     retW = GetFullPathNameW( nameW.Buffer, MAX_PATH, bufferW, NULL);
  81
  82     if (!retW)
  83         ret = 0;
  84     else if (retW > MAX_PATH)
  85     {
  86         SetLastError(ERROR_FILENAME_EXCED_RANGE);
  87         ret = 0;
  88     }
  89     else
  90     {
  91         ret = WideCharToMultiByte(CP_ACP, 0, bufferW, -1, NULL, 0, NULL, NULL);
  92         if (ret && ret <= len)
  93         {
  94             WideCharToMultiByte(CP_ACP, 0, bufferW, -1, buffer, len, NULL, NULL);
  95             ret--; /* length without 0 */
  96
  97             if (lastpart)
  98             {
  99                 LPSTR p = buffer + strlen(buffer) - 1;
 100
 101                 if (*p != '\\')
 102                 {
 103                     while ((p > buffer + 2) && (*p != '\\')) p--;
 104                     *lastpart = p + 1;
 105                 }
 106                 else *lastpart = NULL;
 107             }
 108         }
 109     }
 110
 111     RtlFreeUnicodeString(&nameW);
 112     return ret;
 113 }
 114
 115
 116 /***********************************************************************
 117  *           GetLongPathNameW   (KERNEL32.@)
 118  *
 119  * NOTES
 120  *  observed (Win2000):
 121  *  shortpath=NULL: LastError=ERROR_INVALID_PARAMETER, ret=0
 122  *  shortpath="":   LastError=ERROR_PATH_NOT_FOUND, ret=0
 123  */
 124 DWORD WINAPI GetLongPathNameW( LPCWSTR shortpath, LPWSTR longpath, DWORD longlen )
 125 {
 126     WCHAR               tmplongpath[MAX_PATHNAME_LEN];
 127     LPCWSTR             p;
 128     DWORD               sp = 0, lp = 0;
 129     DWORD               tmplen;
 130     BOOL                unixabsolute = (shortpath[0] == '/');
 131     WIN32_FIND_DATAW    wfd;
 132     HANDLE              goit;
 133
 134     if (!shortpath)
 135     {
 136         SetLastError(ERROR_INVALID_PARAMETER);
 137         return 0;
 138     }
 139     if (!shortpath[0])
 140     {
 141         SetLastError(ERROR_PATH_NOT_FOUND);
 142         return 0;
 143     }
 144
 145     TRACE("%s,%p,%ld\n", debugstr_w(shortpath), longpath, longlen);
 146
 147     if (shortpath[0] == '\\' && shortpath[1] == '\\')
 148     {
 149         ERR("UNC pathname %s\n", debugstr_w(shortpath));
 150         lstrcpynW( longpath, shortpath, longlen );
 151         return strlenW(longpath);
 152     }
 153
 154     /* check for drive letter */
 155     if (!unixabsolute && shortpath[1] == ':' )
 156     {
 157         tmplongpath[0] = shortpath[0];
 158         tmplongpath[1] = ':';
 159         lp = sp = 2;
 160     }
 161
 162     while (shortpath[sp])
 163     {
 164         /* check for path delimiters and reproduce them */
 165         if (shortpath[sp] == '\\' || shortpath[sp] == '/')
 166         {
 167             if (!lp || tmplongpath[lp-1] != '\\')
 168             {
 169                 /* strip double "\\" */
 170                 tmplongpath[lp++] = '\\';
 171             }
 172             tmplongpath[lp] = 0; /* terminate string */
 173             sp++;
 174             continue;
 175         }
 176
 177         p = shortpath + sp;
 178         if (sp == 0 && p[0] == '.' && (p[1] == '/' || p[1] == '\\'))
 179         {
 180             tmplongpath[lp++] = *p++;
 181             tmplongpath[lp++] = *p++;
 182         }
 183         for (; *p && *p != '/' && *p != '\\'; p++);
 184         tmplen = p - (shortpath + sp);
 185         lstrcpynW(tmplongpath + lp, shortpath + sp, tmplen + 1);
 186         /* Check if the file exists and use the existing file name */
 187         goit = FindFirstFileW(tmplongpath, &wfd);
 188         if (goit == INVALID_HANDLE_VALUE)
 189         {
 190             TRACE("not found %s!\n", debugstr_w(tmplongpath));
 191             SetLastError ( ERROR_FILE_NOT_FOUND );
 192             return 0;
 193         }
 194         FindClose(goit);
 195         strcpyW(tmplongpath + lp, wfd.cFileName);
 196         lp += strlenW(tmplongpath + lp);
 197         sp += tmplen;
 198     }
 199     tmplen = strlenW(shortpath) - 1;
 200     if ((shortpath[tmplen] == '/' || shortpath[tmplen] == '\\') &&
 201         (tmplongpath[lp - 1] != '/' && tmplongpath[lp - 1] != '\\'))
 202         tmplongpath[lp++] = shortpath[tmplen];
 203     tmplongpath[lp] = 0;
 204
 205     tmplen = strlenW(tmplongpath) + 1;
 206     if (tmplen <= longlen)
 207     {
 208         strcpyW(longpath, tmplongpath);
 209         TRACE("returning %s\n", debugstr_w(longpath));
 210         tmplen--; /* length without 0 */
 211     }
 212
 213     return tmplen;
 214 }
 215
 216 /***********************************************************************
 217  *           GetLongPathNameA   (KERNEL32.@)
 218  */
 219 DWORD WINAPI GetLongPathNameA( LPCSTR shortpath, LPSTR longpath, DWORD longlen )
 220 {
 221     UNICODE_STRING shortpathW;
 222     WCHAR longpathW[MAX_PATH];
 223     DWORD ret, retW;
 224
 225     if (!shortpath)
 226     {
 227         SetLastError(ERROR_INVALID_PARAMETER);
 228         return 0;
 229     }
 230
 231     TRACE("%s\n", debugstr_a(shortpath));
 232
 233     if (!RtlCreateUnicodeStringFromAsciiz(&shortpathW, shortpath))
 234     {
 235         SetLastError(ERROR_NOT_ENOUGH_MEMORY);
 236         return 0;
 237     }
 238
 239     retW = GetLongPathNameW(shortpathW.Buffer, longpathW, MAX_PATH);
 240
 241     if (!retW)
 242         ret = 0;
 243     else if (retW > MAX_PATH)
 244     {
 245         SetLastError(ERROR_FILENAME_EXCED_RANGE);
 246         ret = 0;
 247     }
 248     else
 249     {
 250         ret = WideCharToMultiByte(CP_ACP, 0, longpathW, -1, NULL, 0, NULL, NULL);
 251         if (ret <= longlen)
 252         {
 253             WideCharToMultiByte(CP_ACP, 0, longpathW, -1, longpath, longlen, NULL, NULL);
 254             ret--; /* length without 0 */
 255         }
 256     }
 257
 258     RtlFreeUnicodeString(&shortpathW);
 259     return ret;
 260 }
 261
 262
 263 /***********************************************************************
 264  *           GetShortPathNameW   (KERNEL32.@)
 265  *
 266  * NOTES
 267  *  observed:
 268  *  longpath=NULL: LastError=ERROR_INVALID_PARAMETER, ret=0
 269  *  longpath="" or invalid: LastError=ERROR_BAD_PATHNAME, ret=0
 270  *
 271  * more observations ( with NT 3.51 (WinDD) ):
 272  * longpath <= 8.3 -> just copy longpath to shortpath
 273  * longpath > 8.3  ->
 274  *             a) file does not exist -> return 0, LastError = ERROR_FILE_NOT_FOUND
 275  *             b) file does exist     -> set the short filename.
 276  * - trailing slashes are reproduced in the short name, even if the
 277  *   file is not a directory
 278  * - the absolute/relative path of the short name is reproduced like found
 279  *   in the long name
 280  * - longpath and shortpath may have the same address
 281  * Peter Ganten, 1999
 282  */
 283 DWORD WINAPI GetShortPathNameW( LPCWSTR longpath, LPWSTR shortpath, DWORD shortlen )
 284 {
 285     WCHAR               tmpshortpath[MAX_PATHNAME_LEN];
 286     LPCWSTR             p;
 287     DWORD               sp = 0, lp = 0;
 288     DWORD               tmplen;
 289     BOOL                unixabsolute = (longpath[0] == '/');
 290     WIN32_FIND_DATAW    wfd;
 291     HANDLE              goit;
 292     UNICODE_STRING      ustr;
 293     WCHAR               ustr_buf[8+1+3+1];
 294
 295     TRACE("%s\n", debugstr_w(longpath));
 296
 297     if (!longpath)
 298     {
 299         SetLastError(ERROR_INVALID_PARAMETER);
 300         return 0;
 301     }
 302     if (!longpath[0])
 303     {
 304         SetLastError(ERROR_BAD_PATHNAME);
 305         return 0;
 306     }
 307
 308     /* check for drive letter */
 309     if (!unixabsolute && longpath[1] == ':' )
 310     {
 311         tmpshortpath[0] = longpath[0];
 312         tmpshortpath[1] = ':';
 313         sp = lp = 2;
 314     }
 315
 316     ustr.Buffer = ustr_buf;
 317     ustr.Length = 0;
 318     ustr.MaximumLength = sizeof(ustr_buf);
 319
 320     while (longpath[lp])
 321     {
 322         /* check for path delimiters and reproduce them */
 323         if (longpath[lp] == '\\' || longpath[lp] == '/')
 324         {
 325             if (!sp || tmpshortpath[sp-1] != '\\')
 326             {
 327                 /* strip double "\\" */
 328                 tmpshortpath[sp] = '\\';
 329                 sp++;
 330             }
 331             tmpshortpath[sp] = 0; /* terminate string */
 332             lp++;
 333             continue;
 334         }
 335
 336         for (p = longpath + lp; *p && *p != '/' && *p != '\\'; p++);
 337         tmplen = p - (longpath + lp);
 338         lstrcpynW(tmpshortpath + sp, longpath + lp, tmplen + 1);
 339         /* Check, if the current element is a valid dos name */
 340         if (tmplen <= 8+1+3+1)
 341         {
 342             memcpy(ustr_buf, longpath + lp, tmplen * sizeof(WCHAR));
 343             ustr_buf[tmplen] = '\0';
 344             ustr.Length = tmplen * sizeof(WCHAR);
 345             if (RtlIsNameLegalDOS8Dot3(&ustr, NULL, NULL))
 346             {
 347                 sp += tmplen;
 348                 lp += tmplen;
 349                 continue;
 350             }
 351         }
 352
 353         /* Check if the file exists and use the existing short file name */
 354         goit = FindFirstFileW(tmpshortpath, &wfd);
 355         if (goit == INVALID_HANDLE_VALUE) goto notfound;
 356         FindClose(goit);
 357         strcpyW(tmpshortpath + sp, wfd.cAlternateFileName);
 358         sp += strlenW(tmpshortpath + sp);
 359         lp += tmplen;
 360     }
 361     tmpshortpath[sp] = 0;
 362
 363     tmplen = strlenW(tmpshortpath) + 1;
 364     if (tmplen <= shortlen)
 365     {
 366         strcpyW(shortpath, tmpshortpath);
 367         TRACE("returning %s\n", debugstr_w(shortpath));
 368         tmplen--; /* length without 0 */
 369     }
 370
 371     return tmplen;
 372
 373  notfound:
 374     TRACE("not found!\n" );
 375     SetLastError ( ERROR_FILE_NOT_FOUND );
 376     return 0;
 377 }
 378
 379 /***********************************************************************
 380  *           GetShortPathNameA   (KERNEL32.@)
 381  */
 382 DWORD WINAPI GetShortPathNameA( LPCSTR longpath, LPSTR shortpath, DWORD shortlen )
 383 {
 384     UNICODE_STRING longpathW;
 385     WCHAR shortpathW[MAX_PATH];
 386     DWORD ret, retW;
 387
 388     if (!longpath)
 389     {
 390         SetLastError(ERROR_INVALID_PARAMETER);
 391         return 0;
 392     }
 393
 394     TRACE("%s\n", debugstr_a(longpath));
 395
 396     if (!RtlCreateUnicodeStringFromAsciiz(&longpathW, longpath))
 397     {
 398         SetLastError(ERROR_NOT_ENOUGH_MEMORY);
 399         return 0;
 400     }
 401
 402     retW = GetShortPathNameW(longpathW.Buffer, shortpathW, MAX_PATH);
 403
 404     if (!retW)
 405         ret = 0;
 406     else if (retW > MAX_PATH)
 407     {
 408         SetLastError(ERROR_FILENAME_EXCED_RANGE);
 409         ret = 0;
 410     }
 411     else
 412     {
 413         ret = WideCharToMultiByte(CP_ACP, 0, shortpathW, -1, NULL, 0, NULL, NULL);
 414         if (ret <= shortlen)
 415         {
 416             WideCharToMultiByte(CP_ACP, 0, shortpathW, -1, shortpath, shortlen, NULL, NULL);
 417             ret--; /* length without 0 */
 418         }
 419     }
 420
 421     RtlFreeUnicodeString(&longpathW);
 422     return ret;
 423 }