getrpcent_r(3) — Linux manual page

getrpcent_r(3)          Library Functions Manual          getrpcent_r(3)

NAME

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

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <netdb.h>

       int getrpcent_r(struct rpcent *result_buf, char buf[.buflen],
                       size_t buflen, struct rpcent **result);
       int getrpcbyname_r(const char *name,
                       struct rpcent *result_buf, char buf[.buflen],
                       size_t buflen, struct rpcent **result);
       int getrpcbynumber_r(int number,
                       struct rpcent *result_buf, char buf[.buflen],
                       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:
               _DEFAULT_SOURCE
           glibc 2.19 and earlier:
               _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 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).

ATTRIBUTES

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────────────────────────┬───────────────┬────────────────┐
       │ Interface                    │ Attribute     │ Value          │
       ├──────────────────────────────┼───────────────┼────────────────┤
       │ getrpcent_r(),               │ Thread safety │ MT-Safe locale │
       │ getrpcbyname_r(),            │               │                │
       │ getrpcbynumber_r()           │               │                │
       └──────────────────────────────┴───────────────┴────────────────┘

VERSIONS

       Functions with similar names exist on some other systems, though
       typically with different calling signatures.

STANDARDS

       GNU.

SEE ALSO

       getrpcent(3), rpc(5)

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                 getrpcent_r(3)

Pages that refer to this page: getrpcent(3)

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