GETSOCKNAME
Section: Linux Programmer's Manual (2)
Updated: 24 July 1993
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NAME
getsockname, getsockname_secure - get socket name
SYNOPSIS
#include <sys/socket.h>
int getsockname(int s, struct sockaddr *name, socklen_t *namelen)
int getsockname_secure(int s, struct sockaddr *name, socklen_t *namelen, security_id_t *sid)
DESCRIPTION
Getsockname
and
getsockname_secure
return the current
name
for the specified socket. The
namelen
parameter should be initialized to indicate
the amount of space pointed to by
name.
On return it contains the actual size of the name
returned (in bytes).
Getsockname_secure may be used to obtain the security
identifier of the socket as well as its name.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and
errno
is set appropriately.
A 0 is returned if the call succeeds, -1 if it fails.
ERRORS
- EBADF
-
The argument
s
is not a valid descriptor.
- ENOTSOCK
-
The argument
s
is a file, not a socket.
- ENOBUFS
-
Insufficient resources were available in the system
to perform the operation.
- EFAULT
-
The
name
parameter points to memory not in a valid part of the
process address space.
CONFORMING TO
SVr4, 4.4BSD (the
getsockname
function call appeared in 4.2BSD). SVr4 documents additional ENOMEM
and ENOSR error codes.
NOTE
The third argument of
getsockname
is in reality an `int *' (and this is what BSD 4.* and libc4 and libc5 have).
Some POSIX confusion resulted in the present socklen_t.
The draft standard has not been adopted yet, but glibc2 already
follows it and also has socklen_t. See also
accept(2).
SEE ALSO
bind(2), socket(2)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- NOTE
-
- SEE ALSO
-
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