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## nng_push_open
Create push socket.
### Synopsis
```c
#include <nng/nng.h>
#include <nng/protocol/pipeline0/push.h>
int nng_push0_open(nng_socket *s);
int nng_push0_open_raw(nng_socket *s);
```
### Description
The `nng_push0_open` function creates a xref:../proto/push.adoc[_PUSH_] version 0 xref:../sock/index.adoc[socket] and returns it at the location pointed to by _s_.
The `nng_push0_open_raw` function creates a _PUSH_ version 0 socket in xref:../sock/index.adoc[raw mode] and returns it at the location pointed to by _s_.
### Return Values
These functions return 0 on success, and non-zero otherwise.
### Errors
[horizontal]
`NNG_ENOMEM`:: Insufficient memory is available.
`NNG_ENOTSUP`:: The protocol is not supported.
### See Also
xref:../proto/pull.adoc[Pull Protocol (_PULL_)],
xref:../proto/push.adoc[Push Protocol (_PUSH_)]
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