getrpcent_r, getrpcbyname_r, getrpcbynumber_r - get RPC entry (reentrant)
Standard C library (
libc,
-lc)
#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);
getrpcent_r(),
getrpcbyname_r(),
getrpcbynumber_r():
Since glibc 2.19:
_DEFAULT_SOURCE
glibc 2.19 and earlier:
_BSD_SOURCE || _SVID_SOURCE
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.
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.
- ENOENT
- (getrpcent_r()) No more records in database.
- ERANGE
-
buf is too small. Try again with a larger buffer
(and increased buflen).
For an explanation of the terms used in this section, see
attributes(7).
Interface |
Attribute |
Value |
getrpcent_r (), getrpcbyname_r (), getrpcbynumber_r () |
Thread safety |
MT-Safe locale |
These functions are GNU extensions. Functions with similar names exist on some
other systems, though typically with different calling signatures.
getrpcent(3),
rpc(5)