Manpage of GETSOCKNAME
GETSOCKNAMESection: Linux Programmer's Manual (2)
NAMEgetsockname - get socket name
#include <sys/socket.h>int getsockname(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
DESCRIPTIONgetsockname() returns the current address to which the socket sockfdis bound, in the buffer pointed to by addr. The addrlenargument should be initialized to indicate the amount of space (in bytes) pointed to by addr. On return it contains the actual size of the socket address.
RETURN VALUEOn success, zero is returned. On error, -1 is returned, and errnois set appropriately.
- The argument sockfdis not a valid file descriptor.
- The addrargument points to memory not in a valid part of the process address space.
- addrlenis invalid (e.g., is negative).
- Insufficient resources were available in the system to perform the operation.
- The file descriptor sockfddoes not refer to a socket.
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD (getsockname() first appeared in 4.2BSD).
NOTESThe third argument of getsockname() 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).
SEE ALSObind(2), socket(2), getifaddrs(3), ip(7), socket(7), unix(7)
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Time: 22:27:41 GMT, June 20, 2016