linux man page for getrpcbynumber_r

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), getr-
       pcbyname(3), and getrpcbynumber(3).  They differ in the way that the rpcent structure is returned, and in the  function	calling  signature
       and return value.  This manual page describes just the differences from the nonreentrant 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 structure.  (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 (getrpcent_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 systems, though typically with different calling sig-
       natures.

SEE ALSO
       getrpcent(3), rpc(5)

COLOPHON
       This  page is part of release 3.27 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)