|GETPEERNAME(3P)||POSIX Programmer's Manual||GETPEERNAME(3P)|
int getpeername(int socket, struct sockaddr *restrict address, socklen_t *restrict address_len);
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 protocol permits connections by unbound clients, and the peer is not bound, then the value stored in the object pointed to by address is unspecified.
- The socket argument is not a valid file descriptor.
- The socket has been shut down.
- The socket is not connected or otherwise has not had the peer pre-specified.
- The socket argument does not refer to a socket.
- The operation is not supported for the socket protocol.
The getpeername() function may fail if:
- Insufficient resources were available in the system to complete the call.
The following sections are informative.
The Base Definitions volume of POSIX.1‐2017,
Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
|2017||IEEE/The Open Group|