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Linux Programmer's Manual (3)
getrpcport - get RPC port number
int getrpcport(char *host, int prognum, int versnum, int proto);
returns the port number for version
of the RPC program
and using protocol
It returns 0 if it cannot contact the portmapper, or if
is not registered.
is registered but not with version
it will still return a port number (for some version of the program)
indicating that the program is indeed registered.
The version mismatch will be detected upon the first call to the service.
Not in POSIX.1-2001.
Present on the BSDs, Solaris, and many other systems.
This page is part of release 3.66 of the Linux
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information about reporting bugs,
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Time: 21:43:00 GMT, July 12, 2014