Here is a list of all variables with links to the structures/unions they belong to:

f_type : finderinfo
fbitmap : scrit
fce_fmodwait : afp_options
fce_h_event : fce_history
fce_h_path : fce_history
fce_h_tv : fce_history
fce_ign_directories : AFPObj
fce_ign_names : AFPObj
fce_notify_script : AFPObj
fce_sendwait : afp_options
fce_version : AFPObj
fcep_event : fce_packet
fcep_event_id : fce_packet
fcep_magic : fce_packet
fcep_options : fce_packet
fcep_path1 : fce_packet
fcep_path2 : fce_packet
fcep_pathlen1 : fce_packet
fcep_pathlen2 : fce_packet
fcep_pid : fce_packet
fcep_user : fce_packet
fcep_userlen : fce_packet
fcep_version : fce_packet
fd : AFPObj, CNID_bdb_private, connection, logtype_conf_t
fd_table_size : db_param
fdset : asev
fdtype : asev_data
filename : ea
finder_info : afp_filedir_parms
finfo : scrit
flag : flag_map
flagname : flag_map
flags : _cnid_module, afp_options, afp_volume_parms, charset_functions, db_table, DSI, ftw_data
flush_frequency : db_param
flush_interval : db_param
flushfork : vfs
fm_array : sl_rslts
fn : test_entry, test_fn
force_gid : afp_options
force_group : afp_options
force_uid : afp_options
force_user : afp_options
format_id : llc
fqdn : afp_options
from : ace_rights_map
from_name : atalk_iconv_t
ftw : ftw_data
func : ftw_data