Require HAVE_NET_IF_H and HAVE_SYS_IOCTL_H to include these fns.
(Fnetwork_interface_info): Check that ifreq struct has required
fields before accessing them; this requires that those fields are
defined as macros, which may be too restrictive on some platforms,
but it is better than failing on other platforms.
(syms_of_process): Only defsubr above fns when included.
for network process.
(socket_options): Add `:' prefix to option names. Add optbit field.
(set_socket_option): Remove no_error arg and special handling of s < 0.
Return 1<<optbit for known option, 0 for unknown.
Do not interpret 0 as false for boolean option (only nil).
Pass failed option and value to report_file_error.
(Fset_network_process_options): Replaced by Fset_network_process_option.
(Fset_network_process_option): New function to set just one option.
(Fmake_network_process): Allow :coding arg to be a cons.
Allow :server arg to be an integer specifying backlog size.
Remove :options arg, and allow options to be specified directly
as :KEY, VALUE pairs. Parse these options before binding socket.
As before, :reuseaddr t is default for a server process, but this
can now be disabled by specifying :reuseaddr nil.
(Fnetwork_interface_info): Rename from Fget_network_interface_info.
(init_process): Availability of network options is now checked with
simpler syntax (featurep 'make-network-process :OPTION); use loop to
setup features.
(syms_of_process): Fix defsubr's for the replaced functions.
(setup_process_coding_systems): New function.
(Fset_process_buffer, Fset_process_filter): Call
setup_process_coding_systems.
(Fstart_process): Initialize the member `filter_multibyte' of
struct Lisp_Process.
(create_process): Call setup_process_coding_systems.
(Fmake_network_process): New keyward `:filter-multibyte'.
Initialize the member `filter_multibyte' of struct Lisp_Process.
Call setup_process_coding_systems.
(server_accept_connection): Call setup_process_coding_systems.
(read_process_output): If the process has a filter, decide the
multibyteness of a string to given to the filter by
`filter_multibyte' member of the process. If the process doesn't
have a filter and the result of conversion is unibyte, use
Fstring_to_multibyte (not Fstring_make_multibyte) to get the
multibyte form.
(Fset_process_coding_system): Call setup_process_coding_systems.
(Fset_process_filter_multibyte): New function.
(Fprocess_filter_multibyte_p): New function.
(syms_of_process): Intern and staticpro QCfilter_multibyte.
Defsubr Sset_process_filter_multibyte and
Sprocess_filter_multibyte_p.
(syms_of_process): Intern and staticpro it.
(Fprocess_variable, Fset_process_variable): New functions.
(syms_of_process): Defsubr them.
(Fstart_process): Initialize private_vars plist to nil.
(Fmake_network_process): New arg :vars to setup the private
variables for new network process.
(server_accept_connection): Copy server's private variables to
client process.
connection's local address in :local property of contact info.
(Fmake_network_process): Record local network address for new
client processes in :local property of contact info.
(syms_of_process): Defsubr it.
(list_processes_1): Use it to format :local/:remote address if
service/host is not set; before emacs would crash in that case.
(Fmake_network_process): Don't use Ffind_operation_coding_system
to setup coding system if host or service is not set.
