/usr/share/man/man3/ is in libefivar-dev 30-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/man/man3/efi_get_variable.3.gz
/usr/share/man/man3/efi_variable_t.3.gz
/usr/share/man/man3/efi_append_variable.3.gz
/usr/share/man/man3/efi_del_variable.3.gz
/usr/share/man/man3/efi_get_next_variable_name.3.gz
/usr/share/man/man3/efi_get_variable_attributes.3.gz
/usr/share/man/man3/efi_get_variable_size.3.gz
/usr/share/man/man3/efi_guid_to_id_guid.3.gz
/usr/share/man/man3/efi_guid_to_name.3.gz
/usr/share/man/man3/efi_guid_to_str.3.gz
/usr/share/man/man3/efi_guid_to_symbol.3.gz
/usr/share/man/man3/efi_name_to_guid.3.gz
/usr/share/man/man3/efi_set_variable.3.gz
/usr/share/man/man3/efi_str_to_guid.3.gz
/usr/share/man/man3/efi_symbol_to_guid.3.gz
/usr/share/man/man3/efi_variable_alloc.3.gz
/usr/share/man/man3/efi_variable_export.3.gz
/usr/share/man/man3/efi_variable_free.3.gz
/usr/share/man/man3/efi_variable_get_attributes.3.gz
/usr/share/man/man3/efi_variable_get_data.3.gz
/usr/share/man/man3/efi_variable_get_guid.3.gz
/usr/share/man/man3/efi_variable_get_name.3.gz
/usr/share/man/man3/efi_variable_import.3.gz
/usr/share/man/man3/efi_variable_realize.3.gz
/usr/share/man/man3/efi_variable_set_attributes.3.gz
/usr/share/man/man3/efi_variable_set_data.3.gz
/usr/share/man/man3/efi_variable_set_guid.3.gz
/usr/share/man/man3/efi_variable_set_name.3.gz
/usr/share/man/man3/efi_variables_supported.3.gz