---
name: "getsockname"
section: "3p"
platform: "linux"
package: "man-pages"
version: "6.19-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/getsockname/3p"
---

# getsockname(3p)

get the socket name

## PROLOG

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

## NAME

getsockname — get the socket name

## SYNOPSIS

```
#include <sys/socket.h>
```

int getsockname(int *socket*, struct sockaddr \*restrict *address*,\
     socklen\_t \*restrict *address\_len*);

## DESCRIPTION

The *getsockname*() function shall retrieve the locally-bound name of the specified socket, store this address in the **sockaddr** structure pointed to by the *address* argument, and store the length of this address in the object pointed to by the *address\_len* argument.

The *address\_len* argument points to a **socklen\_t** object which on input specifies the length of the supplied **sockaddr** structure, and on output specifies the length of the stored address. If the actual length of the address is greater than the length of the supplied **sockaddr** structure, the stored address shall be truncated.

If the socket has not been bound to a local name, the value stored in the object pointed to by *address* is unspecified.

## RETURN VALUE

Upon successful completion, 0 shall be returned, the *address* argument shall point to the address of the socket, and the *address\_len* argument shall point to the length of the address. Otherwise, -1 shall be returned and *errno* set to indicate the error.

## ERRORS

The *getsockname*() function shall fail if:

- **EBADF**

  The *socket* argument is not a valid file descriptor.

- **ENOTSOCK**

  The *socket* argument does not refer to a socket.

- **EOPNOTSUPP**

  The operation is not supported for this socket's protocol.

The *getsockname*() function may fail if:

- **EINVAL**

  The socket has been shut down.

- **ENOBUFS**

  Insufficient resources were available in the system to complete the function.

*The following sections are informative.*

## EXAMPLES

None.

## APPLICATION USAGE

None.

## RATIONALE

None.

## FUTURE DIRECTIONS

None.

## SEE ALSO

*accept()*, *bind()*, *getpeername()*, *socket()*

The Base Definitions volume of POSIX.1‐2017, ***\<sys\_socket.h\>***\

## COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting\_bugs.html .