получить имя сокета (get the socket name)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
getsockname — get the socket name
Синопсис (Synopsis)
#include <sys/socket.h>
int getsockname(int socket, struct sockaddr *restrict address,
socklen_t *restrict address_len);
Описание (Description)
The getsockname() function shall retrieve the locally-bound name
of the specified socket, store this address in the sockaddr
structure pointed to by the address argument, and store the
length of this address in the object pointed to by the
address_len argument.
The address_len argument points to a socklen_t object which on
input specifies the length of the supplied sockaddr structure,
and on output specifies the length of the stored address. If the
actual length of the address is greater than the length of the
supplied sockaddr structure, the stored address shall be
truncated.
If the socket has not been bound to a local name, the value
stored in the object pointed to by address is unspecified.
Возвращаемое значение (Return value)
Upon successful completion, 0 shall be returned, the address
argument shall point to the address of the socket, and the
address_len argument shall point to the length of the address.
Otherwise, -1 shall be returned and errno set to indicate the
error.
Ошибки (Error)
The getsockname() function shall fail if:
EBADF The socket argument is not a valid file descriptor.
ENOTSOCK
The socket argument does not refer to a socket.
EOPNOTSUPP
The operation is not supported for this socket's protocol.
The getsockname() function may fail if:
EINVAL The socket has been shut down.
ENOBUFS
Insufficient resources were available in the system to
complete the function.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
accept(3p), bind(3p), getpeername(3p), socket(3p)
The Base Definitions volume of POSIX.1‐2017, sys_socket.h(0p)
