---
name: "gensio_acc_set_callback"
section: "3"
platform: "linux"
package: "gensio"
version: "3.0.4-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gensio_acc_set_callback"
---

# gensio\_acc\_set\_callback(3)

Set the event callback and user data for a gensio accepter

## NAME

gensio\_accepter\_set\_callback, gensio\_accepter\_get\_user\_data, gensio\_accepter\_set\_user\_data - Set the event callback and user data for a gensio accepter

## SYNOPSIS

**#include \<gensio/gensio.h\>**

- **void gensio\_accepter\_set\_callback(struct gensio \*io,**

  **gensio\_accepter\_event cb, void \*user\_data)**

- **void gensio\_accepter\_set\_user\_data(struct gensio \*io, void \*user\_data);**

  - **void \*gensio\_accepter\_get\_user\_data(struct gensio \*io)**

  ## DESCRIPTION

**gensio\_accepter\_set\_callback** sets the event handler and data for the gensio accepter.  This function may be called again if the gensio accepter cannot generate any callbacks, generally after it has been shutdown.  Otherwise race conditions may occur.

**gensio\_accepter\_set\_user\_data** Just sets the user\_data field in the gensio accepter.  If this is called when the gensio is running, race conditions may occur.

**gensio\_accepter\_get\_user\_data** Return the user data passed in with the gensio accepter was created or set by one of the above two functions.

## SEE ALSO

[gensio(5)](/gensio/5.md), [gensio\_accepter\_event(3)](/gensio_accepter_event/3.md)