getrpcbynumber_r(3) — Linux manual page


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

NAME         top

       getrpcent_r,  getrpcbyname_r, getrpcbynumber_r - get RPC entry (reen‐

SYNOPSIS         top

       #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():
           Since glibc 2.19:
           Glibc 2.19 and earlier:
               _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION         top

       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
       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

       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         top

       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         top

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

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

ATTRIBUTES         top

       For an explanation of the terms used in this section, see

       │Interface           Attribute     Value          │
       │getrpcent_r(),      │ Thread safety │ MT-Safe locale │
       │getrpcbyname_r(),   │               │                │
       │getrpcbynumber_r()  │               │                │

CONFORMING TO         top

       These functions are GNU extensions.  Functions with similar names
       exist on some other systems, though typically with different calling

SEE ALSO         top

       getrpcent(3), rpc(5)

COLOPHON         top

       This page is part of release 5.08 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at

GNU                              2017-09-15                   GETRPCENT_R(3)