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getpeername(2) [opendarwin man page]

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

NAME
getpeername -- get name of connected peer SYNOPSIS
#include <sys/socket.h> int getpeername(int s, struct sockaddr *name, int *namelen); DESCRIPTION
Getpeername() returns the name of the peer connected to socket s. 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). The name is truncated if the buffer pro- vided is too small. DIAGNOSTICS
A 0 is returned if the call succeeds, -1 if it fails. ERRORS
The call succeeds unless: [EBADF] The argument s is not a valid descriptor. [ENOTSOCK] The argument s is a file, not a socket. [ENOTCONN] The socket is not connected. [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. SEE ALSO
accept(2), bind(2), socket(2), getsockname(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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GETPEERNAME(2)						     Linux Programmer's Manual						    GETPEERNAME(2)

NAME
getpeername - get name of connected peer socket SYNOPSIS
#include <sys/socket.h> int getpeername(int s, struct sockaddr *name, socklen_t *namelen); DESCRIPTION
Getpeername returns the name of the peer connected to socket s. 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). The name is truncated if the buffer pro- vided is too small. RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. ERRORS
EBADF The argument s is not a valid descriptor. ENOTSOCK The argument s is a file, not a socket. ENOTCONN The socket is not connected. 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 getpeername function call first appeared in 4.2BSD). NOTE
The third argument of getpeername 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
accept(2), bind(2), getsockname(2) BSD Man Page 1993-07-30 GETPEERNAME(2)
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