struct dirent *lfc_readdir (lfc_DIR *dirp)
DESCRIPTIONlfc_readdir reads the LFC directory opened by lfc_opendir in the name server. This routine returns a pointer to a structure containing the current directory entry. lfc_readdir caches a variable number of such entries, depending on the filename size, to minimize the number of requests to the name server.
- specifies the pointer value returned by lfc_opendir.
NOTEOnly the fields d_name, d_reclen and on some platforms d_namlen are filled.
RETURN VALUEThis routine returns a pointer to a structure containing the current directory entry if the operation was successful or NULL if the end of the directory was reached or if the operation failed. When the end of the directory is encountered, serrno is not changed. If the operation failed, serrno is set appropriately.
As lfc_readdir returns a null pointer both at the end of the directory and on error, an application wishing to check for error situations should set serrno to 0, then call lfc_readdir, then check serrno and if it is non-zero, assume an error has occurred.
- File descriptor in DIR structure is invalid.
- dirp is a NULL pointer.
- Communication error.
- Name server is not running or is being shutdown.
AUTHORLCG Grid Deployment Team