sal/osl/unx/file_stat.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <osl/file.h>
  21
  22 #include "system.hxx"
  23 #include <sys/types.h>
  24 #include <dirent.h>
  25 #include <errno.h>
  26 #include <limits.h>
  27 #include <unistd.h>
  28
  29 #include <osl/diagnose.h>
  30
  31 #include "file_impl.hxx"
  32 #include "file_error_transl.hxx"
  33 #include "file_path_helper.hxx"
  34 #include "file_url.hxx"
  35 #include "uunxapi.hxx"
  36
  37 namespace
  38 {
  39     void set_file_type(const struct stat& file_stat, oslFileStatus* pStat)
  40     {
  41         /* links to directories state also to be a directory */
  42        if (S_ISLNK(file_stat.st_mode))
  43            pStat->eType = osl_File_Type_Link;
  44        else if (S_ISDIR(file_stat.st_mode))
  45            pStat->eType = osl_File_Type_Directory;
  46        else if (S_ISREG(file_stat.st_mode))
  47            pStat->eType = osl_File_Type_Regular;
  48        else if (S_ISFIFO(file_stat.st_mode))
  49            pStat->eType = osl_File_Type_Fifo;
  50        else if (S_ISSOCK(file_stat.st_mode))
  51            pStat->eType = osl_File_Type_Socket;
  52        else if (S_ISCHR(file_stat.st_mode) || S_ISBLK(file_stat.st_mode))
  53            pStat->eType = osl_File_Type_Special;
  54        else
  55            pStat->eType = osl_File_Type_Unknown;
  56
  57        pStat->uValidFields |= osl_FileStatus_Mask_Type;
  58     }
  59
  60     void set_file_access_mask(const struct stat& file_stat, oslFileStatus* pStat)
  61     {
  62         // user permissions
  63         if (S_IRUSR & file_stat.st_mode)
  64             pStat->uAttributes |= osl_File_Attribute_OwnRead;
  65
  66         if (S_IWUSR & file_stat.st_mode)
  67             pStat->uAttributes |= osl_File_Attribute_OwnWrite;
  68
  69         if (S_IXUSR & file_stat.st_mode)
  70             pStat->uAttributes |= osl_File_Attribute_OwnExe;
  71
  72         // group permissions
  73         if (S_IRGRP & file_stat.st_mode)
  74             pStat->uAttributes |= osl_File_Attribute_GrpRead;
  75
  76         if (S_IWGRP & file_stat.st_mode)
  77             pStat->uAttributes |= osl_File_Attribute_GrpWrite;
  78
  79         if (S_IXGRP & file_stat.st_mode)
  80             pStat->uAttributes |= osl_File_Attribute_GrpExe;
  81
  82         // others permissions
  83         if (S_IROTH & file_stat.st_mode)
  84             pStat->uAttributes |= osl_File_Attribute_OthRead;
  85
  86         if (S_IWOTH & file_stat.st_mode)
  87             pStat->uAttributes |= osl_File_Attribute_OthWrite;
  88
  89         if (S_IXOTH & file_stat.st_mode)
  90             pStat->uAttributes |= osl_File_Attribute_OthExe;
  91
  92         pStat->uValidFields |= osl_FileStatus_Mask_Attributes;
  93     }
  94
  95     /* This code used not to use access(...) because access follows links which
  96        may cause performance problems see #97133.  (That apparently references a
  97        no-longer accessible Hamburg-internal bug-tracking system.)
  98        However, contrary to what is stated above the use of access calls is
  99        required on network file systems not using unix semantics (AFS, see
 100        fdo#43095).
 101     */
 102     void set_file_access_rights(const OUString& file_path, oslFileStatus* pStat)
 103     {
 104         pStat->uValidFields |= osl_FileStatus_Mask_Attributes;
 105
 106         if (access_u(file_path.pData, W_OK) < 0)
 107             pStat->uAttributes |= osl_File_Attribute_ReadOnly;
 108
 109         if (access_u(file_path.pData, X_OK) == 0)
 110             pStat->uAttributes |= osl_File_Attribute_Executable;
 111     }
 112
 113     void set_file_hidden_status(const OUString& file_path, oslFileStatus* pStat)
 114     {
 115         pStat->uAttributes   = osl::systemPathIsHiddenFileOrDirectoryEntry(file_path) ? osl_File_Attribute_Hidden : 0;
 116         pStat->uValidFields |= osl_FileStatus_Mask_Attributes;
 117     }
 118
 119     /* the set_file_access_rights must be called after set_file_hidden_status(...) and
 120        set_file_access_mask(...) because of the hack in set_file_access_rights(...) */
 121     void set_file_attributes(
 122         const OUString& file_path, const struct stat& file_stat, const sal_uInt32 uFieldMask, oslFileStatus* pStat)
 123     {
 124         set_file_hidden_status(file_path, pStat);
 125         set_file_access_mask(file_stat, pStat);
 126
 127         // we set the file access rights only on demand
 128         // because it's potentially expensive
 129         if (uFieldMask & osl_FileStatus_Mask_Attributes)
 130             set_file_access_rights(file_path, pStat);
 131     }
 132
 133     void set_file_access_time(const struct stat& file_stat, oslFileStatus* pStat)
 134     {
 135         pStat->aAccessTime.Seconds  = file_stat.st_atime;
 136         pStat->aAccessTime.Nanosec  = 0;
 137            pStat->uValidFields        |= osl_FileStatus_Mask_AccessTime;
 138     }
 139
 140     void set_file_modify_time(const struct stat& file_stat, oslFileStatus* pStat)
 141     {
 142         pStat->aModifyTime.Seconds  = file_stat.st_mtime;
 143         pStat->aModifyTime.Nanosec  = 0;
 144         pStat->uValidFields        |= osl_FileStatus_Mask_ModifyTime;
 145     }
 146
 147     void set_file_size(const struct stat& file_stat, oslFileStatus* pStat)
 148     {
 149         if (S_ISREG(file_stat.st_mode))
 150            {
 151             pStat->uFileSize     = file_stat.st_size;
 152                pStat->uValidFields |= osl_FileStatus_Mask_FileSize;
 153            }
 154     }
 155
 156     /* we only need to call stat or lstat if one of the
 157        following flags is set */
 158     bool is_stat_call_necessary(sal_uInt32 field_mask, oslFileType file_type)
 159     {
 160         return (
 161                 ((field_mask & osl_FileStatus_Mask_Type) && (file_type == osl_File_Type_Unknown)) ||
 162                 (field_mask & osl_FileStatus_Mask_Attributes) ||
 163                 (field_mask & osl_FileStatus_Mask_CreationTime) ||
 164                 (field_mask & osl_FileStatus_Mask_AccessTime) ||
 165                 (field_mask & osl_FileStatus_Mask_ModifyTime) ||
 166                 (field_mask & osl_FileStatus_Mask_FileSize) ||
 167                 (field_mask & osl_FileStatus_Mask_LinkTargetURL) ||
 168                 (field_mask & osl_FileStatus_Mask_Validate));
 169     }
 170
 171     oslFileError set_link_target_url(const OUString& file_path, oslFileStatus* pStat)
 172     {
 173         OUString link_target;
 174         if (!osl::realpath(file_path, link_target))
 175             return oslTranslateFileError(errno);
 176
 177         oslFileError osl_error = osl_getFileURLFromSystemPath(link_target.pData, &pStat->ustrLinkTargetURL);
 178         if (osl_error != osl_File_E_None)
 179             return osl_error;
 180
 181         pStat->uValidFields |= osl_FileStatus_Mask_LinkTargetURL;
 182         return osl_File_E_None;
 183     }
 184
 185     oslFileError setup_osl_getFileStatus(
 186         DirectoryItem_Impl * pImpl, oslFileStatus* pStat, OUString& file_path)
 187     {
 188         if ((pImpl == nullptr) || (pStat == nullptr))
 189             return osl_File_E_INVAL;
 190
 191         file_path = OUString(pImpl->m_ustrFilePath);
 192         OSL_ASSERT(!file_path.isEmpty());
 193         if (file_path.isEmpty())
 194             return osl_File_E_INVAL;
 195
 196         pStat->uValidFields = 0;
 197         return osl_File_E_None;
 198     }
 199
 200 }
 201
 202 oslFileError SAL_CALL osl_getFileStatus(oslDirectoryItem Item, oslFileStatus* pStat, sal_uInt32 uFieldMask)
 203 {
 204     DirectoryItem_Impl * pImpl = static_cast< DirectoryItem_Impl* >(Item);
 205
 206     OUString file_path;
 207     oslFileError  osl_error = setup_osl_getFileStatus(pImpl, pStat, file_path);
 208     if (osl_error != osl_File_E_None)
 209         return osl_error;
 210
 211     struct stat file_stat;
 212
 213     bool bStatNeeded = is_stat_call_necessary(uFieldMask, pImpl->getFileType());
 214     if (bStatNeeded && (osl::lstat(file_path, file_stat) != 0))
 215         return oslTranslateFileError(errno);
 216
 217     if (bStatNeeded)
 218     {
 219         // we set all these attributes because it's cheap
 220         set_file_type(file_stat, pStat);
 221         set_file_access_time(file_stat, pStat);
 222         set_file_modify_time(file_stat, pStat);
 223         set_file_size(file_stat, pStat);
 224         set_file_attributes(file_path, file_stat, uFieldMask, pStat);
 225
 226         // file exists semantic of osl_FileStatus_Mask_Validate
 227         if ((uFieldMask & osl_FileStatus_Mask_LinkTargetURL) && S_ISLNK(file_stat.st_mode))
 228         {
 229             osl_error = set_link_target_url(file_path, pStat);
 230             if (osl_error != osl_File_E_None)
 231                 return osl_error;
 232         }
 233     }
 234 #ifdef _DIRENT_HAVE_D_TYPE
 235     else if (uFieldMask & osl_FileStatus_Mask_Type)
 236     {
 237         pStat->eType = pImpl->getFileType();
 238         pStat->uValidFields |= osl_FileStatus_Mask_Type;
 239     }
 240 #endif /* _DIRENT_HAVE_D_TYPE */
 241
 242     if (uFieldMask & osl_FileStatus_Mask_FileURL)
 243     {
 244         if ((osl_error = osl_getFileURLFromSystemPath(file_path.pData, &pStat->ustrFileURL)) != osl_File_E_None)
 245             return osl_error;
 246
 247         pStat->uValidFields |= osl_FileStatus_Mask_FileURL;
 248     }
 249
 250     if (uFieldMask & osl_FileStatus_Mask_FileName)
 251     {
 252         osl_systemPathGetFileNameOrLastDirectoryPart(file_path.pData, &pStat->ustrFileName);
 253         pStat->uValidFields |= osl_FileStatus_Mask_FileName;
 254        }
 255     return osl_File_E_None;
 256 }
 257
 258 static oslFileError osl_psz_setFileAttributes( const sal_Char* pszFilePath, sal_uInt64 uAttributes )
 259 {
 260     oslFileError osl_error = osl_File_E_None;
 261     mode_t       nNewMode  = 0;
 262
 263      OSL_ENSURE(!(osl_File_Attribute_Hidden & uAttributes), "osl_File_Attribute_Hidden doesn't work under Unix");
 264
 265     if (uAttributes & osl_File_Attribute_OwnRead)
 266         nNewMode |= S_IRUSR;
 267
 268     if (uAttributes & osl_File_Attribute_OwnWrite)
 269         nNewMode|=S_IWUSR;
 270
 271     if  (uAttributes & osl_File_Attribute_OwnExe)
 272         nNewMode|=S_IXUSR;
 273
 274     if (uAttributes & osl_File_Attribute_GrpRead)
 275         nNewMode|=S_IRGRP;
 276
 277     if (uAttributes & osl_File_Attribute_GrpWrite)
 278         nNewMode|=S_IWGRP;
 279
 280     if (uAttributes & osl_File_Attribute_GrpExe)
 281         nNewMode|=S_IXGRP;
 282
 283     if (uAttributes & osl_File_Attribute_OthRead)
 284         nNewMode|=S_IROTH;
 285
 286     if (uAttributes & osl_File_Attribute_OthWrite)
 287         nNewMode|=S_IWOTH;
 288
 289     if (uAttributes & osl_File_Attribute_OthExe)
 290         nNewMode|=S_IXOTH;
 291
 292     if (chmod(pszFilePath, nNewMode) < 0)
 293         osl_error = oslTranslateFileError(errno);
 294
 295     return osl_error;
 296 }
 297
 298 oslFileError SAL_CALL osl_setFileAttributes( rtl_uString* ustrFileURL, sal_uInt64 uAttributes )
 299 {
 300     char path[PATH_MAX];
 301     oslFileError eRet;
 302
 303     OSL_ASSERT( ustrFileURL );
 304
 305     /* convert file url to system path */
 306     eRet = FileURLToPath( path, PATH_MAX, ustrFileURL );
 307     if( eRet != osl_File_E_None )
 308         return eRet;
 309
 310 #ifdef MACOSX
 311     if ( macxp_resolveAlias( path, PATH_MAX ) != 0 )
 312       return oslTranslateFileError( errno );
 313 #endif/* MACOSX */
 314
 315     return osl_psz_setFileAttributes( path, uAttributes );
 316 }
 317
 318 static oslFileError osl_psz_setFileTime (
 319     const sal_Char* pszFilePath,
 320     const TimeValue* pLastAccessTime,
 321     const TimeValue* pLastWriteTime )
 322 {
 323     int nRet=0;
 324     struct utimbuf aTimeBuffer;
 325     struct stat aFileStat;
 326 #ifdef DEBUG_OSL_FILE
 327     struct tm* pTM=0;
 328 #endif
 329
 330     nRet = lstat_c(pszFilePath,&aFileStat);
 331
 332     if ( nRet < 0 )
 333     {
 334         nRet=errno;
 335         return oslTranslateFileError(nRet);
 336     }
 337
 338 #ifdef DEBUG_OSL_FILE
 339     fprintf(stderr,"File Times are (in localtime):\n");
 340     pTM=localtime(&aFileStat.st_ctime);
 341     fprintf(stderr,"CreationTime is '%s'\n",asctime(pTM));
 342     pTM=localtime(&aFileStat.st_atime);
 343     fprintf(stderr,"AccessTime   is '%s'\n",asctime(pTM));
 344     pTM=localtime(&aFileStat.st_mtime);
 345     fprintf(stderr,"Modification is '%s'\n",asctime(pTM));
 346
 347     fprintf(stderr,"File Times are (in UTC):\n");
 348     fprintf(stderr,"CreationTime is '%s'\n",ctime(&aFileStat.st_ctime));
 349     fprintf(stderr,"AccessTime   is '%s'\n",ctime(&aTimeBuffer.actime));
 350     fprintf(stderr,"Modification is '%s'\n",ctime(&aTimeBuffer.modtime));
 351 #endif
 352
 353     if ( pLastAccessTime != nullptr )
 354     {
 355         aTimeBuffer.actime=pLastAccessTime->Seconds;
 356     }
 357     else
 358     {
 359         aTimeBuffer.actime=aFileStat.st_atime;
 360     }
 361
 362     if ( pLastWriteTime != nullptr )
 363     {
 364         aTimeBuffer.modtime=pLastWriteTime->Seconds;
 365     }
 366     else
 367     {
 368         aTimeBuffer.modtime=aFileStat.st_mtime;
 369     }
 370
 371     /* mfe: Creation time not used here! */
 372
 373 #ifdef DEBUG_OSL_FILE
 374     fprintf(stderr,"File Times are (in localtime):\n");
 375     pTM=localtime(&aFileStat.st_ctime);
 376     fprintf(stderr,"CreationTime now '%s'\n",asctime(pTM));
 377     pTM=localtime(&aTimeBuffer.actime);
 378     fprintf(stderr,"AccessTime   now '%s'\n",asctime(pTM));
 379     pTM=localtime(&aTimeBuffer.modtime);
 380     fprintf(stderr,"Modification now '%s'\n",asctime(pTM));
 381
 382     fprintf(stderr,"File Times are (in UTC):\n");
 383     fprintf(stderr,"CreationTime now '%s'\n",ctime(&aFileStat.st_ctime));
 384     fprintf(stderr,"AccessTime   now '%s'\n",ctime(&aTimeBuffer.actime));
 385     fprintf(stderr,"Modification now '%s'\n",ctime(&aTimeBuffer.modtime));
 386 #endif
 387
 388     nRet = utime_c(pszFilePath,&aTimeBuffer);
 389     if ( nRet < 0 )
 390     {
 391         nRet=errno;
 392         return oslTranslateFileError(nRet);
 393     }
 394
 395     return osl_File_E_None;
 396 }
 397
 398 oslFileError SAL_CALL osl_setFileTime (
 399     rtl_uString* ustrFileURL,
 400     SAL_UNUSED_PARAMETER const TimeValue* /* pCreationTime */,
 401     const TimeValue* pLastAccessTime,
 402     const TimeValue* pLastWriteTime )
 403 {
 404     char path[PATH_MAX];
 405     oslFileError eRet;
 406
 407     OSL_ASSERT( ustrFileURL );
 408
 409     /* convert file url to system path */
 410     eRet = FileURLToPath( path, PATH_MAX, ustrFileURL );
 411     if( eRet != osl_File_E_None )
 412         return eRet;
 413
 414 #ifdef MACOSX
 415     if ( macxp_resolveAlias( path, PATH_MAX ) != 0 )
 416       return oslTranslateFileError( errno );
 417 #endif/* MACOSX */
 418
 419     return osl_psz_setFileTime( path, pLastAccessTime, pLastWriteTime );
 420 }
 421
 422 sal_Bool
 423 SAL_CALL osl_identicalDirectoryItem( oslDirectoryItem a, oslDirectoryItem b)
 424 {
 425     DirectoryItem_Impl *pA = static_cast<DirectoryItem_Impl *>(a);
 426     DirectoryItem_Impl *pB = static_cast<DirectoryItem_Impl *>(b);
 427     if (a == b)
 428         return true;
 429     /* same name => same item, unless renaming / moving madness has occurred */
 430     if (pA->m_ustrFilePath == pB->m_ustrFilePath)
 431         return true;
 432
 433     struct stat a_stat, b_stat;
 434
 435     if (osl::lstat(OUString(pA->m_ustrFilePath), a_stat) != 0 ||
 436         osl::lstat(OUString(pB->m_ustrFilePath), b_stat) != 0)
 437         return false;
 438
 439     return (a_stat.st_ino == b_stat.st_ino);
 440 }
 441
 442 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */