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getpeername(1) [minix man page]

GETPEERNAME(1)						      General Commands Manual						    GETPEERNAME(1)

getpeername - get name of connected TCP/IP peer SYNOPSIS
getpeername [-n] [-p protocol] DESCRIPTION
getpeername prints the IP address and service name (port number) of the remote peer connected to standard input. The IP address and the service name are printed on the same line, separated by one space. OPTIONS
-n Don't translate IP addresses and port numbers to names. -p protocol Force getpeername to use protocol as the protocol when translating port numbers to service names. Protocol can be tcp and udp. Normally, getpeername automatically determines what type of socket it is connected to. SEE ALSO
getpeername(3). BUGS
Only works on IP sockets. 1997 April 13 GETPEERNAME(1)

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GETPEERNAME(2)						      BSD System Calls Manual						    GETPEERNAME(2)

getpeername -- get address of connected peer SYNOPSIS
#include <sys/socket.h> int getpeername(int socket, struct sockaddr *restrict address, socklen_t *restrict address_len); DESCRIPTION
The getpeername() function returns the address of the peer connected to the specified socket. The address_len parameter should be initialized to indicate the amount of space pointed to by address. On return it contains the actual size of the address returned (in bytes). The address is truncated if the buffer provided is too small. RETURN VALUES
The getpeername() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS
The call succeeds unless: [EBADF] The argument socket is not a valid descriptor. [EFAULT] The address parameter points to memory not in a valid part of the process address space. [EINVAL] socket has been shut down. [ENOBUFS] Insufficient resources were available in the system to perform the operation. [ENOTCONN] Either the socket is not connected or it has not had the peer pre-specified. [ENOTSOCK] The argument socket refers to something other than a socket (e.g., a file). [EOPNOTSUPP] getpeername() is not supported for the protocol in use by socket. SEE ALSO
accept(2), bind(2), getsockname(2), socket(2) HISTORY
The getpeername() function call appeared in 4.2BSD. 4.2 Berkeley Distribution June 4, 1993 4.2 Berkeley Distribution
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