filestat.c

apr-1.2.7.tar.gz源码 支持svn的需求

    }

    if (!GetFileInformationByHandle(thefile->filehand, &FileInfo)) {
        return apr_get_os_error();
    }

    fillin_fileinfo(finfo, (WIN32_FILE_ATTRIBUTE_DATA *) &FileInfo, 1, wanted);

    if (finfo->filetype == APR_REG)
    {
        /* Go the extra mile to be -certain- that we have a real, regular
         * file, since the attribute bits aren't a certain thing.  Even
         * though fillin should have hinted if we *must* do this, we
         * don't need to take chances while the handle is already open.
         */
        DWORD FileType;
        if (FileType = GetFileType(thefile->filehand)) {
            if (FileType == FILE_TYPE_CHAR) {
                finfo->filetype = APR_CHR;
            }
            else if (FileType == FILE_TYPE_PIPE) {
                finfo->filetype = APR_PIPE;
            }
            /* Otherwise leave the original conclusion alone 
             */
        }
    }

    finfo->pool = thefile->pool;

    /* ### The finfo lifetime may exceed the lifetime of thefile->pool
     * but finfo's aren't managed in pools, so where on earth would
     * we pstrdup the fname into???
     */
    finfo->fname = thefile->fname;
 
    /* Extra goodies known only by GetFileInformationByHandle() */
    finfo->inode  =  (apr_ino_t)FileInfo.nFileIndexLow
                  | ((apr_ino_t)FileInfo.nFileIndexHigh << 32);
    finfo->device = FileInfo.dwVolumeSerialNumber;
    finfo->nlink  = FileInfo.nNumberOfLinks;

    finfo->valid |= APR_FINFO_IDENT | APR_FINFO_NLINK;

    /* If we still want something more (besides the name) go get it! 
     */
    if ((wanted &= ~finfo->valid) & ~APR_FINFO_NAME) {
        return more_finfo(finfo, thefile->filehand, wanted, MORE_OF_HANDLE);
    }

    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_file_perms_set(const char *fname,
                                           apr_fileperms_t perms)
{
    return APR_ENOTIMPL;
}

APR_DECLARE(apr_status_t) apr_stat(apr_finfo_t *finfo, const char *fname,
                                   apr_int32_t wanted, apr_pool_t *pool)
{
    /* XXX: is constant - needs testing - which requires a lighter-weight root test fn */
    int isroot = 0;
    apr_status_t ident_rv = 0;
    apr_status_t rv;
#if APR_HAS_UNICODE_FS
    apr_wchar_t wfname[APR_PATH_MAX];

#endif
    char *filename = NULL;
    /* These all share a common subset of this structure */
    union {
        WIN32_FIND_DATAW w;
        WIN32_FIND_DATAA n;
        WIN32_FILE_ATTRIBUTE_DATA i;
    } FileInfo;
    
    /* Catch fname length == MAX_PATH since GetFileAttributesEx fails 
     * with PATH_NOT_FOUND.  We would rather indicate length error than 
     * 'not found'
     */        
    if (strlen(fname) >= APR_PATH_MAX) {
        return APR_ENAMETOOLONG;
    }

#if APR_HAS_UNICODE_FS
    IF_WIN_OS_IS_UNICODE
    {
        if ((wanted & (APR_FINFO_IDENT | APR_FINFO_NLINK)) 
               || (~wanted & APR_FINFO_LINK)) {
            /* FindFirstFile and GetFileAttributesEx can't figure the inode,
             * device or number of links, so we need to resolve with an open 
             * file handle.  If the user has asked for these fields, fall over 
             * to the get file info by handle method.  If we fail, or the user
             * also asks for the file name, continue by our usual means.
             *
             * We also must use this method for a 'true' stat, that resolves
             * a symlink (NTFS Junction) target.  This is because all fileinfo
             * on a Junction always returns the junction, opening the target
             * is the only way to resolve the target's attributes.
             */
            if ((ident_rv = resolve_ident(finfo, fname, wanted, pool)) 
                    == APR_SUCCESS)
                return ident_rv;
            else if (ident_rv == APR_INCOMPLETE)
                wanted &= ~finfo->valid;
        }

        if (rv = utf8_to_unicode_path(wfname, sizeof(wfname) 
                                            / sizeof(apr_wchar_t), fname))
            return rv;
        if (!(wanted & APR_FINFO_NAME)) {
            if (!GetFileAttributesExW(wfname, GetFileExInfoStandard, 
                                      &FileInfo.i))
                return apr_get_os_error();
        }
        else {
            /* Guard against bogus wildcards and retrieve by name
             * since we want the true name, and set aside a long
             * enough string to handle the longest file name.
             */
            char tmpname[APR_FILE_MAX * 3 + 1];
            HANDLE hFind;
            if ((rv = test_safe_name(fname)) != APR_SUCCESS) {
                return rv;
            }
            hFind = FindFirstFileW(wfname, &FileInfo.w);
            if (hFind == INVALID_HANDLE_VALUE)
                return apr_get_os_error();
            FindClose(hFind);
            if (unicode_to_utf8_path(tmpname, sizeof(tmpname), 
                                     FileInfo.w.cFileName)) {
                return APR_ENAMETOOLONG;
            }
            filename = apr_pstrdup(pool, tmpname);
        }
    }
#endif
#if APR_HAS_ANSI_FS
    ELSE_WIN_OS_IS_ANSI
    {
        char *root = NULL;
        const char *test = fname;
        rv = apr_filepath_root(&root, &test, APR_FILEPATH_NATIVE, pool);
        isroot = (root && *root && !(*test));

        if ((apr_os_level >= APR_WIN_98) && (!(wanted & APR_FINFO_NAME) || isroot))
        {
            /* cannot use FindFile on a Win98 root, it returns \*
             * GetFileAttributesExA is not available on Win95
             */
            if (!GetFileAttributesExA(fname, GetFileExInfoStandard, 
                                     &FileInfo.i)) {
                return apr_get_os_error();
            }
        }
        else if (isroot) {
            /* This is Win95 and we are trying to stat a root.  Lie.
             */
            if (GetDriveType(fname) != DRIVE_UNKNOWN) 
            {
                finfo->pool = pool;
                finfo->filetype = 0;
                finfo->mtime = apr_time_now();
                finfo->protection |= APR_WREAD | APR_WEXECUTE | APR_WWRITE;
                finfo->protection |= (finfo->protection << prot_scope_group) 
                                   | (finfo->protection << prot_scope_user);
                finfo->valid |= APR_FINFO_TYPE | APR_FINFO_PROT 
                              | APR_FINFO_MTIME
                              | (wanted & APR_FINFO_LINK);
                return (wanted &= ~finfo->valid) ? APR_INCOMPLETE 
                                                 : APR_SUCCESS;
            }
            else
                return APR_FROM_OS_ERROR(ERROR_PATH_NOT_FOUND);
        }
        else  {
            /* Guard against bogus wildcards and retrieve by name
             * since we want the true name, or are stuck in Win95,
             * or are looking for the root of a Win98 drive.
             */
            HANDLE hFind;
            if ((rv = test_safe_name(fname)) != APR_SUCCESS) {
                return rv;
            }
            hFind = FindFirstFileA(fname, &FileInfo.n);
            if (hFind == INVALID_HANDLE_VALUE) {
                return apr_get_os_error();
    	    } 
            FindClose(hFind);
            filename = apr_pstrdup(pool, FileInfo.n.cFileName);
        }
    }
#endif

    if (ident_rv != APR_INCOMPLETE) {
        if (fillin_fileinfo(finfo, (WIN32_FILE_ATTRIBUTE_DATA *) &FileInfo, 
                            0, wanted))
        {
            /* Go the extra mile to assure we have a file.  WinNT/2000 seems
             * to reliably translate char devices to the path '\\.\device'
             * so go ask for the full path.
             */
            if (apr_os_level >= APR_WIN_NT)
            {
#if APR_HAS_UNICODE_FS
                apr_wchar_t tmpname[APR_FILE_MAX];
                apr_wchar_t *tmpoff = NULL;
                if (GetFullPathNameW(wfname, sizeof(tmpname) / sizeof(apr_wchar_t),
                                     tmpname, &tmpoff))
                {
                    if (!wcsncmp(tmpname, L"\\\\.\\", 4)) {
#else
                /* Same initial logic as above, but
                 * only for WinNT/non-UTF-8 builds of APR:
                 */
                char tmpname[APR_FILE_MAX];
                char *tmpoff;
                if (GetFullPathName(fname, sizeof(tmpname), tmpname, &tmpoff))
                {
                    if (!strncmp(tmpname, "\\\\.\\", 4)) {
#endif
                        if (tmpoff == tmpname + 4) {
                            finfo->filetype = APR_CHR;
                        }
                        /* For WHATEVER reason, CHR devices such as \\.\con 
                         * or \\.\lpt1 *may*not* update tmpoff; in fact the
                         * resulting tmpoff is set to NULL.  Guard against 
                         * either case.
                         *
                         * This code is identical for wide and narrow chars...
                         */
                        else if (!tmpoff) {
                            tmpoff = tmpname + 4;
                            while (*tmpoff) {
                                if (*tmpoff == '\\' || *tmpoff == '/') {
                                    break;
                                }
                                ++tmpoff;
                            }
                            if (!*tmpoff) {
                                finfo->filetype = APR_CHR;
                            }
                        }
                    }
                }
                else {
                    finfo->valid &= ~APR_FINFO_TYPE;
                }

            }
            else {
                finfo->valid &= ~APR_FINFO_TYPE;
            }
        }
        finfo->pool = pool;
    }

    if (filename && !isroot) {
        finfo->name = filename;
        finfo->valid |= APR_FINFO_NAME;
    }

    if (wanted &= ~finfo->valid) {
        /* Caller wants more than APR_FINFO_MIN | APR_FINFO_NAME */
#if APR_HAS_UNICODE_FS
        if (apr_os_level >= APR_WIN_NT)
            return more_finfo(finfo, wfname, wanted, MORE_OF_WFSPEC);
#endif
        return more_finfo(finfo, fname, wanted, MORE_OF_FSPEC);
    }

    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_file_attrs_set(const char *fname,
                                             apr_fileattrs_t attributes,
                                             apr_fileattrs_t attr_mask,
                                             apr_pool_t *pool)
{
    DWORD flags;
    apr_status_t rv;
#if APR_HAS_UNICODE_FS
    apr_wchar_t wfname[APR_PATH_MAX];
#endif

    /* Don't do anything if we can't handle the requested attributes */
    if (!(attr_mask & (APR_FILE_ATTR_READONLY
                       | APR_FILE_ATTR_HIDDEN)))
        return APR_SUCCESS;

#if APR_HAS_UNICODE_FS
    IF_WIN_OS_IS_UNICODE
    {
        if (rv = utf8_to_unicode_path(wfname,
                                      sizeof(wfname) / sizeof(wfname[0]),
                                      fname))
            return rv;
        flags = GetFileAttributesW(wfname);
    }
#endif
#if APR_HAS_ANSI_FS
    ELSE_WIN_OS_IS_ANSI
    {
        flags = GetFileAttributesA(fname);
    }
#endif

    if (flags == 0xFFFFFFFF)
        return apr_get_os_error();

    if (attr_mask & APR_FILE_ATTR_READONLY)
    {
        if (attributes & APR_FILE_ATTR_READONLY)
            flags |= FILE_ATTRIBUTE_READONLY;
        else
            flags &= ~FILE_ATTRIBUTE_READONLY;
    }

    if (attr_mask & APR_FILE_ATTR_HIDDEN)
    {
        if (attributes & APR_FILE_ATTR_HIDDEN)
            flags |= FILE_ATTRIBUTE_HIDDEN;
        else
            flags &= ~FILE_ATTRIBUTE_HIDDEN;
    }

#if APR_HAS_UNICODE_FS
    IF_WIN_OS_IS_UNICODE
    {
        rv = SetFileAttributesW(wfname, flags);
    }
#endif
#if APR_HAS_ANSI_FS
    ELSE_WIN_OS_IS_ANSI
    {
        rv = SetFileAttributesA(fname, flags);
    }
#endif

    if (rv == 0)
        return apr_get_os_error();

    return APR_SUCCESS;
}


APR_DECLARE(apr_status_t) apr_file_mtime_set(const char *fname,
                                             apr_time_t mtime,
                                             apr_pool_t *pool)
{
    apr_file_t *thefile;
    apr_status_t rv;

    rv = apr_file_open(&thefile, fname,
                       APR_READ | APR_WRITEATTRS,
                       APR_OS_DEFAULT, pool);
    if (!rv)
    {
        FILETIME file_ctime;
        FILETIME file_atime;
        FILETIME file_mtime;

        if (!GetFileTime(thefile->filehand,
                         &file_ctime, &file_atime, &file_mtime))
            rv = apr_get_os_error();
        else
        {
            AprTimeToFileTime(&file_mtime, mtime);
            if (!SetFileTime(thefile->filehand,
                             &file_ctime, &file_atime, &file_mtime))
                rv = apr_get_os_error();
        }

        apr_file_close(thefile);
    }

    return rv;
}