/*
 * Copyright 2005-2008, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
// no header guards: must be included at appropriate part of .cpp


class LocalFD {
public:
        LocalFD()
        {
        }

        ~LocalFD()
        {
        }

        status_t Init(int fd)
        {
#ifndef BUILDING_FS_SHELL
                Descriptor* descriptor = get_descriptor(fd);
                if (descriptor && !descriptor->IsSystemFD()) {
                        // we need to get a path
                        fFD = -1;
                        return descriptor->GetPath(fPath);
                }
#endif

                fFD = fd;
                fPath = "";
                return B_OK;
        }

        int FD() const
        {
                return fFD;
        }

        const char* Path() const
        {
                return (fFD < 0 ? fPath.c_str() : NULL);
        }

        bool IsSymlink() const
        {
                struct stat st;
                int result;
                if (Path())
                        result = lstat(Path(), &st);
                else
                        result = fstat(fFD, &st);

                return (result == 0 && S_ISLNK(st.st_mode));
        }

private:
        string  fPath;
        int             fFD;
};