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# nng_surveyor_open
## NAME
nng_surveyor_open --- create _SURVEYOR_ socket
## SYNOPSIS
```c
#include <nng/nng.h>
#include <nng/protocol/survey0/survey.h>
int nng_surveyor0_open(nng_socket *s);
int nng_surveyor0_open_raw(nng_socket *s);
```
## DESCRIPTION
The `nng_surveyor0_open()` function creates a [{{i:*SURVEYOR*}}][surveyor]
version 0 [socket][socket] and returns it at the location
pointed to by _s_.
The `nng_surveyor0_open_raw()` function creates a _SURVEYOR_
version 0 socket in
[raw mode][raw] and returns it at the location pointed to by _s_.
## RETURN VALUES
These functions return 0 on success, and non-zero otherwise.
## ERRORS
- `NNG_ENOMEM`: Insufficient memory is available.
- `NNG_ENOTSUP`: The protocol is not supported.
## SEE ALSO
[Sockets][socket],
[_RESPONDENT_ Protocol][respondent],
[_SURVEYOR_ Protocol][surveyor]
{{#include ../refs.md}}
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