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GETPEERNAME(2)             Linux Programmer's Manual            GETPEERNAME(2)

       getpeername - get name of connected peer socket

       #include <sys/socket.h>

       int getpeername(int sockfd, struct sockaddr *addr, socklen_t *addrlen);

       getpeername() returns the address of the peer connected to  the  socket
       sockfd,  in the buffer pointed to by addr.  The addrlen argument should
       be initialized to indicate the amount of space pointed to by addr.   On
       return  it  contains  the  actual size of the name returned (in bytes).
       The name is truncated if the buffer provided is too small.

       The returned address is truncated if the buffer provided is too  small;
       in  this case, addrlen will return a value greater than was supplied to
       the call.

       On success, zero is returned.  On error, -1 is returned, and  errno  is
       set appropriately.

       EBADF  The argument sockfd is not a valid descriptor.

       EFAULT The  addr  argument  points to memory not in a valid part of the
              process address space.

       EINVAL addrlen is invalid (e.g., is negative).

              Insufficient resources were available in the system  to  perform
              the operation.

              The socket is not connected.

              The argument sockfd is a file, not a socket.

       SVr4,  4.4BSD  (the  getpeername()  function  call  first  appeared  in
       4.2BSD), POSIX.1-2001.

       The third argument of getpeername() is in reality an int * (and this is
       what  4.x BSD and libc4 and libc5 have).  Some POSIX confusion resulted
       in the present socklen_t, also used by glibc.  See also accept(2).

       accept(2), bind(2), getsockname(2), ip(7), socket(7), unix(7)

       This page is part of release 3.25 of the Linux  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux                             2008-12-03                    GETPEERNAME(2)

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Gedruckt am: 11.12.2017 06:44 GMT+0100 (2017-12-11T06:44:46+01:00)