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Linux 2.6 - man page for getrpcbynumber_r (linux section 3)

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GETRPCENT_R(3)			    Linux Programmer's Manual			   GETRPCENT_R(3)

NAME
       getrpcent_r, getrpcbyname_r, getrpcbynumber_r - get RPC entry (reentrant)

SYNOPSIS
       #include <netdb.h>

       int getrpcent_r(struct rpcent *result_buf, char *buf,
		       size_t buflen, struct rpcent **result);

       int getrpcbyname_r(const char *name,
		       struct rpcent *result_buf, char *buf,
		       size_t buflen, struct rpcent **result);

       int getrpcbynumber_r(int number,
		       struct rpcent *result_buf, char *buf,
		       size_t buflen, struct rpcent **result);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       getrpcent_r(), getrpcbyname_r(), getrpcbynumber_r():
	   _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION
       The  getrpcent_r(),  getrpcbyname_r(),  and getrpcbynumber_r() functions are the reentrant
       equivalents of, respectively, getrpcent(3), getrpcbyname(3), and getrpcbynumber(3).   They
       differ  in the way that the rpcent structure is returned, and in the function calling sig-
       nature and return value.  This manual page describes just the differences  from	the  non-
       reentrant functions.

       Instead	of returning a pointer to a statically allocated rpcent structure as the function
       result, these functions copy the structure into the location pointed to by result_buf.

       The buf array is used to store the string fields pointed to by the returned rpcent  struc-
       ture.  (The nonreentrant functions allocate these strings in static storage.)  The size of
       this array is specified in buflen.  If buf is too small, the call  fails  with  the  error
       ERANGE,	and  the  caller  must	try again with a larger buffer.  (A buffer of length 1024
       bytes should be sufficient for most applications.)

       If the function call successfully obtains an RPC record, then *result is set  pointing  to
       result_buf; otherwise, *result is set to NULL.

RETURN VALUE
       On  success,  these  functions  return 0.  On error, they return one of the positive error
       numbers listed in ERRORS.

       On error, record not found (getrpcbyname_r(), getrpcbynumber_r()), or end of input (getrp-
       cent_r()) result is set to NULL.

ERRORS
       ENOENT (getrpcent_r()) No more records in database.

       ERANGE buf is too small.  Try again with a larger buffer (and increased buflen).

CONFORMING TO
       These functions are GNU extensions.  Functions with similar names exist on some other sys-
       tems, though typically with different calling signatures.

SEE ALSO
       getrpcent(3), rpc(5)

COLOPHON
       This page is part of release 3.55 of the Linux man-pages project.  A  description  of  the
       project,     and    information	  about    reporting	bugs,	 can	be    found    at
       http://www.kernel.org/doc/man-pages/.

GNU					    2010-09-10				   GETRPCENT_R(3)
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