rpcgen_tli(1) rpcgen_tli(1)
rpcgen_tli - an RPC protocol compiler
rpcgen_tli infile
rpcgen_tli [-Dname<b>[=value<b>]] [-T] [-I | -K secs<b>] infile
rpcgen_tli -c|-h|-l|-m|-t [-o outfile <b>] infile
rpcgen_tli -s nettype <b>[-o outfile<b>] infile
rpcgen_tli -n netid <b>[-o outfile<b>] infile
rpcgen_tli is a tool that generates C code to implement an RPC protocol.
rpcgen_tli will produce files to be used with libnsl [see intro.3n(1)].
To produce files to be used with the libc see rpcgen(1). The input to
rpcgen_tli is a language similar to C known as RPC Language (Remote
Procedure Call Language).
rpcgen_tli is normally used as in the first synopsis where it takes an
input file and generates up to four output files. If the infile is named
proto.x, then rpcgen_tli will generate a header file in proto.h, XDR
routines in proto_xdr.c, server-side stubs in proto_svc.c, and clientside
stubs in proto_clnt.c. With the -T option, it will also generate
the RPC dispatch table in proto_tbl.i.
The server created can be started both by the port monitors (for example,
inetd or listen) 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 must be specified by setting up
the environment variable PM_TRANSPORT. When the server generated by
rpcgen_tli is executed, it creates server handles for all the transports
specified in NETPATH environment variable, or if it is not set, 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 symbol, RPC_SVC_FG, can be defined at compilation time to make
the server process run 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 procedure,
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. Some examples
of their usage is described in the EXAMPLE section below. When
rpcgen_tli is executed with the -s option, it creates servers for that
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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_tli accepts the standard input.
The C preprocessor, cc -E [see cc(1)], is run on the input file before it
is actually interpreted by rpcgen_tli. For each type of output file,
rpcgen_tli defines a special preprocessor symbol for use by the
rpcgen_tli programmer:
RPC_HDR defined when compiling into header files
RPC_XDR defined when compiling into XDR routines
RPC_SVC defined when compiling into server-side stubs
RPC_CLNT defined when compiling into client-side stubs
RPC_TBL defined when compiling into RPC dispatch tables
Any line beginning with `%' is passed directly into the output file,
uninterpreted by rpcgen_tli.
For every data type referred to in infile, rpcgen_tli 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
routines.
The following options are available:
-c Compile into XDR routines.
-Dname<b>[=value<b>]
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 file). -T option can be
used in conjunction to produce a header file which supports RPC
dispatch tables.
-I Compile support for inetd(1M) in the server side stubs. Such
servers can be self-started or can be started by inetd. 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 servers exit
after 120 seconds (default). The default can be changed with the -K
option. All the error messages for inetd servers are always logged
with syslog(3).
Note: this option is supported for backward compatibility only. By
default, rpcgen generates servers that can be invoked through
portmonitors.
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-K secs
By default, services created using rpcgen_tli 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, -K 0 can be used. To create a server that
never exits, the appropriate argument is -K -1.
When monitoring for a server, some portmonitors, like listen(1M),
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_tli
should be used with -K -1.
-l Compile into client-side stubs.
-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 initialization.
-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 and -t modes only).
-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(3N) 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.
-t Compile into RPC dispatch table.
-T Generate the code to support RPC dispatch tables.
The options -c, -h, -l, -m, -s 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 options.
The RPC Language does not support nesting of structures. As a workaround,
structures can be declared at the top-level, and their name used
inside other structures in order to achieve the same effect.
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Name clashes can occur when using program definitions, since the apparent
scoping does not really apply. Most of these can be avoided by giving
unique names for programs, versions, procedures and types.
The server code generated with -n option refers to the transport
indicated by netid and hence is very site specific.
The following example:
$ rpcgen_tli -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 file) to the
standard output.
$ rpcgen_tli -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:
$ rpcgen_tli -s datagram_n -DTEST prot.x
To create the server side stubs for the transport indicated by netid <b>tcp,
use:
$ rpcgen_tli -n tcp -o prot_svc.c prot.x
cc(1), rpcgen(1)
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