getsockname man page on 4.4BSD

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GETSOCKNAME(2)		    BSD System Calls Manual		GETSOCKNAME(2)

     getsockname — get socket name

     getsockname(int s, struct sockaddr *name, int *namelen);

     Getsockname() returns the current name for the specified socket.  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).

     A 0 is returned if the call succeeds, -1 if it fails.

     The call succeeds unless:

     [EBADF]	 The argument s is not a valid descriptor.

     [ENOTSOCK]	 The argument s is a file, not a socket.

     [ENOBUFS]	 Insufficient resources were available in the system to per‐
		 form the operation.

     [EFAULT]	 The name parameter points to memory not in a valid part of
		 the process address space.

     bind(2), socket(2)

     Names bound to sockets in the UNIX domain are inaccessible; getsockname
     returns a zero length name.

     The getsockname function call appeared in 4.2BSD.

4.2 Berkeley Distribution	 June 4, 1993	     4.2 Berkeley Distribution

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