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Overview
Comment:Fix fossil_stat() and fossil_chdir() such that they accept paths>MAX_PATH. For file_access(), implement a workaround that the '\\?\' prefix can be handled.
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Timelines: family | ancestors | descendants | both | win32-longpath
Files: files | file ages | folders
SHA1: 29f023fe536c49b2bfc222e785b3e5ec6ea1aac5
User & Date: jan.nijtmans 2013-12-12 13:54:20.222
Context
2013-12-12
14:27
Implement file_access() function such that it accepts paths>MAX_PATH. Implementation copied (with some simplifications) from Tcl 8.6 check-in: ba4b3ac1d2 user: jan.nijtmans tags: win32-longpath
13:54
Fix fossil_stat() and fossil_chdir() such that they accept paths>MAX_PATH. For file_access(), implement a workaround that the '\\?\' prefix can be handled. check-in: 29f023fe53 user: jan.nijtmans tags: win32-longpath
11:16
Bug-fix: didn't compile on win32, and handle extended UNC paths correctly. check-in: da8d516fe1 user: jan.nijtmans tags: win32-longpath
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/file.c.
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** The file status information from the most recent stat() call.
**
** Use _stati64 rather than stat on windows, in order to handle files
** larger than 2GB.
*/
#if defined(_WIN32) && (defined(__MSVCRT__) || defined(_MSC_VER))
# undef stat
# define stat _stati64





#endif
/*
** On Windows S_ISLNK always returns FALSE.
*/
#if !defined(S_ISLNK)
# define S_ISLNK(x) (0)
#endif








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** The file status information from the most recent stat() call.
**
** Use _stati64 rather than stat on windows, in order to handle files
** larger than 2GB.
*/
#if defined(_WIN32) && (defined(__MSVCRT__) || defined(_MSC_VER))
# undef stat
# define stat _fossil_stati64
struct stat {
    i64 st_size;
    i64 st_mtime;
    int st_mode;
};
#endif
/*
** On Windows S_ISLNK always returns FALSE.
*/
#if !defined(S_ISLNK)
# define S_ISLNK(x) (0)
#endif
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  char *zMbcs = fossil_utf8_to_filename(zFilename);
  if( isWd && g.allowSymlinks ){
    rc = lstat(zMbcs, buf);
  }else{
    rc = stat(zMbcs, buf);
  }
#else

  wchar_t *zMbcs = fossil_utf8_to_filename(zFilename);
  if( memcmp(zMbcs, L"\\\\?\\", 8)==0 ){
    /* Unfortunately, _wstati64 cannot handle extended prefixes. */
    if( memcmp(zMbcs+4, "UNC\\", 8)==0 ){
      zMbcs[6] = '\\';
      rc = _wstati64(zMbcs+6, buf);
    }else{
      rc = _wstati64(zMbcs+4, buf);
    }

  }else{
    rc = _wstati64(zMbcs, buf);
  }
#endif
  fossil_filename_free(zMbcs);
  return rc;
}

/*








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  char *zMbcs = fossil_utf8_to_filename(zFilename);
  if( isWd && g.allowSymlinks ){
    rc = lstat(zMbcs, buf);
  }else{
    rc = stat(zMbcs, buf);
  }
#else
  WIN32_FILE_ATTRIBUTE_DATA attr;
  wchar_t *zMbcs = fossil_utf8_to_filename(zFilename);
  rc = !GetFileAttributesExW(zMbcs, GetFileExInfoStandard, &attr);

  if( !rc ){
    ULARGE_INTEGER ull;
    ull.LowPart = attr.ftLastWriteTime.dwLowDateTime;
    ull.HighPart = attr.ftLastWriteTime.dwHighDateTime;
    buf->st_mode = (attr.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY)?

                    S_IFDIR:S_IFREG;
    buf->st_size = (((i64)attr.nFileSizeHigh)<<32) | buf->attr.nFileSizeLow;
    buf->st_mtime = ull.QuadPart / 10000000ULL - 11644473600ULL;
  }
#endif
  fossil_filename_free(zMbcs);
  return rc;
}

/*
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/*
** Wrapper around the access() system call.
*/
int file_access(const char *zFilename, int flags){
#ifdef _WIN32
  wchar_t *zMbcs = fossil_utf8_to_filename(zFilename);










  int rc = _waccess(zMbcs, flags);

#else
  char *zMbcs = fossil_utf8_to_filename(zFilename);
  int rc = access(zMbcs, flags);
#endif
  fossil_filename_free(zMbcs);
  return rc;
}

/*
** Wrapper around the chdir() system call.
** If bChroot=1, do a chroot to this dir as well
** (UNIX only)
*/
int file_chdir(const char *zChDir, int bChroot){
#ifdef _WIN32
  wchar_t *zPath = fossil_utf8_to_filename(zChDir);
  int rc = _wchdir(zPath);
#else
  char *zPath = fossil_utf8_to_filename(zChDir);
  int rc = chdir(zPath);
  if( !rc && bChroot ){
    rc = chroot(zPath);
    if( !rc ) rc = chdir("/");
  }








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/*
** Wrapper around the access() system call.
*/
int file_access(const char *zFilename, int flags){
#ifdef _WIN32
  wchar_t *zMbcs = fossil_utf8_to_filename(zFilename);
  int rc;
  if( memcmp(zMbcs, L"\\\\?\\", 8)==0 ){
    /* Unfortunately, _waccess cannot handle extended prefixes. */
    if( memcmp(zMbcs+4, "UNC\\", 8)==0 ){
      zMbcs[6] = '\\';
      rc = _waccess(zMbcs+6, flags);
    }else{
      rc = _waccess(zMbcs+4, flags);
    }
  }else{
    rc = _waccess(zMbcs, flags);
  }
#else
  char *zMbcs = fossil_utf8_to_filename(zFilename);
  int rc = access(zMbcs, flags);
#endif
  fossil_filename_free(zMbcs);
  return rc;
}

/*
** Wrapper around the chdir() system call.
** If bChroot=1, do a chroot to this dir as well
** (UNIX only)
*/
int file_chdir(const char *zChDir, int bChroot){
#ifdef _WIN32
  wchar_t *zPath = fossil_utf8_to_filename(zChDir);
  int rc = SetCurrentDirectoryW(zPath)==0;
#else
  char *zPath = fossil_utf8_to_filename(zChDir);
  int rc = chdir(zPath);
  if( !rc && bChroot ){
    rc = chroot(zPath);
    if( !rc ) rc = chdir("/");
  }
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