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Top Forums Programming Is it possible to call remote function in another daemon? Post 302520286 by jim mcnamara on Friday 6th of May 2011 10:10:09 AM
Old 05-06-2011
migurus & kumaran -

My reading shws that the the accepted definition of RPC is 'calling a procedure in another process'
R. Teer 2004 Solaris System Programming p 951.

Stevens has a similar definition - I don't have my copy here.

The original question was not about IPC per se. It was 'how to call a function in another daemon'. Using IPC lets you do that but it is not the main function for IPC. IPC is all about sharing data across processes. A side effect is the ability to call a function in another process.

Exposing a function entry point in a separate process is different from that. It is the whole idea behind UNIX code: Do only one thing, and do it very well.
 

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IPC(2)							     Linux Programmer's Manual							    IPC(2)

NAME
socketcall - socket system calls SYNOPSIS
int socketcall(int call, unsigned long *args); DESCRIPTION
socketcall is a common kernel entry point for the socket system calls. call determines which socket function to invoke. args points to a block containing the actual arguments, which are passed through to the appropriate call. User programs should call the appropriate functions by their usual names. Only standard library implementors and kernel hackers need to know about socketcall. CONFORMING TO
This call is specific to Linux, and should not be used in programs intended to be portable. SEE ALSO
accept(2), bind(2), connect(2), getpeername(2), getsockname(2), getsockopt(2), listen(2), recv(2), recvfrom(2), send(2), sendto(2), set- sockopt(2), shutdown(2), socket(2), socketpair(2) Linux 1.2.4 1995-04-15 IPC(2)
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