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RPCGEN(1)               FreeBSD General Commands Manual              RPCGEN(1)

     rpcgen - an RPC protocol compiler

     rpcgen infile
     rpcgen [-a] [-b] [-C] [-Dname[=value]] [-i size] [-I -P [-K seconds]]
            [-L] [-M] [-N] [-T] [-Y pathname] infile
     rpcgen [-c | -h | -l | -m | -t | -Sc | -Ss | -Sm] [-o outfile] [infile]
     rpcgen [-s nettype] [-o outfile] [infile]
     rpcgen [-n netid] [-o outfile] [infile]

     The rpcgen utility is a tool that generates C code to implement an RPC
     protocol.  The input to rpcgen is a language similar to C known as RPC
     Language (Remote Procedure Call Language).

     The rpcgen utility is normally used as in the first synopsis where it
     takes an input file and generates three output files.  If the infile is
     named proto.x, then rpcgen generates a header in proto.h, XDR routines in
     proto_xdr.c, server-side stubs in proto_svc.c, and client-side stubs in
     proto_clnt.c.  With the -T option, it also generates the RPC dispatch
     table in proto_tbl.i.

     The rpcgen utility can also generate sample client and server files that
     can be customized to suit a particular application.  The -Sc, -Ss and -Sm
     options generate sample client, server and makefile, respectively.  The
     -a option generates all files, including sample files.  If the infile is
     proto.x, then the client side sample file is written to proto_client.c,
     the server side sample file to proto_server.c and the sample makefile to

     If option -I is set, the server created can be started both by the port
     monitors (for example, inetd(8)) or by itself.  When it is started by a
     port monitor, it creates servers only for the transport for which the
     file descriptor 0 was passed.  The name of the transport may be specified
     by setting up the environment variable NLSPROVIDER.  When the server
     generated by rpcgen is executed, it creates server handles for all the
     transports specified in NETPATH environment variable, or if it is unset,
     it creates server handles for all the visible transports from
     /etc/netconfig file.  Note: the transports are chosen at run time and not
     at compile time.  When the server is self-started, it backgrounds itself
     by default.  A special define symbol RPC_SVC_FG can be used to run the
     server process in foreground.

     The second synopsis provides special features which allow for the
     creation of more sophisticated RPC servers.  These features include
     support for user provided #defines and RPC dispatch tables.  The entries
     in the RPC dispatch table contain:
           +o   pointers to the service routine corresponding to that
           +o   a pointer to the input and output arguments,
           +o   the size of these routines.
     A server can use the dispatch table to check authorization and then to
     execute the service routine; a client library may use it to deal with the
     details of storage management and XDR data conversion.

     The other three synopses shown above are used when one does not want to
     generate all the output files, but only a particular one.  See the
     EXAMPLES section below for examples of rpcgen usage.  When rpcgen is
     executed with the -s option, it creates servers for that particular class
     of transports.  When executed with the -n option, it creates a server for
     the transport specified by netid.  If infile is not specified, rpcgen
     accepts the standard input.

     The C preprocessor, cc -E is run on the input file before it is actually
     interpreted by rpcgen.  For each type of output file, rpcgen defines a
     special preprocessor symbol for use by the rpcgen programmer:

             defined when compiling into headers

             defined when compiling into XDR routines

             defined when compiling into server-side stubs

             defined when compiling into client-side stubs

             defined when compiling into RPC dispatch tables

     Any line beginning with ``%'' is passed directly into the output file,
     uninterpreted by rpcgen.  To specify the path name of the C preprocessor
     use -Y flag.

     For every data type referred to in infile, rpcgen assumes that there
     exists a routine with the string xdr_ prepended to the name of the data
     type.  If this routine does not exist in the RPC/XDR library, it must be
     provided.  Providing an undefined data type allows customization of
     xdr(3) routines.

     The following options are available:

     -a      Generate all files, including sample files.

     -b      Backward compatibility mode.  Generate transport specific RPC
             code for older versions of the operating system.

     -c      Compile into XDR routines.

     -C      Generate ANSI C code.  This is always done, the flag is only
             provided for backwards compatibility.


             Define a symbol name.  Equivalent to the #define directive in the
             source.  If no value is given, value is defined as 1.  This
             option may be specified more than once.

     -h      Compile into C data-definitions (a header).  -T option can be
             used in conjunction to produce a header which supports RPC
             dispatch tables.

     -i size
             Size at which to start generating inline code.  This option is
             useful for optimization.  The default size is 5.

             Note: in order to provide backwards compatibility with the older
             rpcgen on the FreeBSD platform, the default is actually 0 (which
             means that inline code generation is disabled by default).  You
             must specify a non-zero value explicitly to override this

     -I      Compile support for inetd(8) in the server side stubs.  Such
             servers can be self-started or can be started by inetd(8).  When
             the server is self-started, it backgrounds itself by default.  A
             special define symbol RPC_SVC_FG can be used to run the server
             process in foreground, or the user may simply compile without the
             -I option.

             If there are no pending client requests, the inetd(8) servers
             exit after 120 seconds (default).  The default can be changed
             with the -K option.  All the error messages for inetd(8) servers
             are always logged with syslog(3).

             Note: Contrary to some systems, in FreeBSD this option is needed
             to generate servers that can be invoked through portmonitors and

     -K seconds
             By default, services created using rpcgen and invoked through
             port monitors wait 120 seconds after servicing a request before
             exiting.  That interval can be changed using the -K flag.  To
             create a server that exits immediately upon servicing a request,
             use -K 0.  To create a server that never exits, the appropriate
             argument is -K -1.

             When monitoring for a server, some portmonitors always spawn a
             new process in response to a service request.  If it is known
             that a server will be used with such a monitor, the server should
             exit immediately on completion.  For such servers, rpcgen should
             be used with -K 0.

     -l      Compile into client-side stubs.

     -L      When the servers are started in foreground, use syslog(3) to log
             the server errors instead of printing them on the standard error.

     -m      Compile into server-side stubs, but do not generate a "main"
             routine.  This option is useful for doing callback-routines and
             for users who need to write their own "main" routine to do

     -M      Generate multithread-safe stubs for passing arguments and results
             between rpcgen generated code and user written code.  This option
             is useful for users who want to use threads in their code.
             However, the rpc_svc_calls(3) functions are not yet MT-safe,
             which means that rpcgen generated server-side code will not be

     -N      Allow procedures to have multiple arguments.  It also uses the
             style of parameter passing that closely resembles C.  So, when
             passing an argument to a remote procedure, you do not have to
             pass a pointer to the argument, but can pass the argument itself.
             This behavior is different from the old style of rpcgen generated
             code.  To maintain backward compatibility, this option is not the

     -n netid
             Compile into server-side stubs for the transport specified by
             netid.  There should be an entry for netid in the netconfig
             database.  This option may be specified more than once, so as to
             compile a server that serves multiple transports.

     -o outfile
             Specify the name of the output file.  If none is specified,
             standard output is used (-c, -h, -l, -m, -n, -s, -Sc, -Sm, -Ss,
             and -t modes only).

     -P      Compile support for port monitors in the server side stubs.

             Note: Contrary to some systems, in FreeBSD this option is needed
             to generate servers that can be monitored.

             If the -I option has been specified, -P is turned off

     -s nettype
             Compile into server-side stubs for all the transports belonging
             to the class nettype.  The supported classes are netpath,
             visible, circuit_n, circuit_v, datagram_n, datagram_v, tcp, and
             udp (see rpc(3) for the meanings associated with these classes).
             This option may be specified more than once.  Note: the
             transports are chosen at run time and not at compile time.

     -Sc     Generate sample client code that uses remote procedure calls.

     -Sm     Generate a sample Makefile which can be used for compiling the

     -Ss     Generate sample server code that uses remote procedure calls.

     -t      Compile into RPC dispatch table.

     -T      Generate the code to support RPC dispatch tables.

             The options -c, -h, -l, -m, -s, -Sc, -Sm, -Ss, and -t are used
             exclusively to generate a particular type of file, while the
             options -D and -T are global and can be used with the other

     -Y pathname
             Give the name of the directory where rpcgen will start looking
             for the C-preprocessor.

     If the RPCGEN_CPP environment variable is set, its value is used as the
     command line of the C preprocessor to be run on the input file.

     The following example:
           example% rpcgen -T prot.x

     generates all the five files: prot.h, prot_clnt.c, prot_svc.c, prot_xdr.c
     and prot_tbl.i.

     The following example sends the C data-definitions (header) to the
     standard output.
           example% rpcgen -h prot.x

     To send the test version of the -DTEST, server side stubs for all the
     transport belonging to the class datagram_n to standard output, use:
           example% rpcgen -s datagram_n -DTEST prot.x

     To create the server side stubs for the transport indicated by netid tcp,
           example% rpcgen -n tcp -o prot_svc.c prot.x

     cc(1), rpc(3), rpc_svc_calls(3), syslog(3), xdr(3), inetd(8)

     The rpcgen chapter in the NETP manual.

FreeBSD 11.0-PRERELEASE        September 2, 2005       FreeBSD 11.0-PRERELEASE


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