-u abort
-u ask_confirmation
-u chomp
-u concat_path_file
-u copy_file
-u creat
-u create_icmp_socket
-u device_open
-u display_interfaces
-u error_msg
-u error_msg_and_die
-u fgets
-u find_pid_by_name
-u full_version
-u full_write
-u get_last_path_component
-u get_line_from_file
-u herror
-u herror_msg_and_die
-u interface_opt_a
-u invalid_date
-u is_directory
-u last_char_is
-u lookup
-u make_directory
-u make_human_readable_str
-u memory_exhausted
-u mode_string
-u my_getpwuid
-u open
-u parse_mode
-u parse_number
-u perror
-u perror_msg
-u perror_msg_and_die
-u print_file
-u print_file_by_name
-u process_escape_sequence
-u read
-u recursive_action
-u remove
-u remove_file
-u safe_read
-u safe_strncpy
-u socket
-u syslog
-u syslog_msg
-u time
-u too_few_args
-u u_signal_names
-u wfopen
-u write
-u xcalloc
-u xfopen
-u xgethostbyname
-u xmalloc
-u xreadlink
-u xrealloc
-u xregcomp
-u xstrdup