gnutls\_transport\_set\_pull\_function(3) gnutls gnutls\_transport\_set\_pull\_function(3)

# [NAME](#NAME)

gnutls\_transport\_set\_pull\_function - API function

# [SYNOPSIS](#SYNOPSIS)

**#include <gnutls/gnutls.h>**

**void gnutls\_transport\_set\_pull\_function(gnutls\_session\_t session, gnutls\_pull\_func pull\_func);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_session\_t session](#gnutls_session_t)

is a **gnutls\_session\_t** type.

[gnutls\_pull\_func pull\_func](#gnutls_pull_func)

a callback function similar to **read()**

# [DESCRIPTION](#DESCRIPTION)

This is the function where you set a function for gnutls to receive data. Normally, if you use berkeley style sockets, do not need to use this function since the default [recv(2)](/man/os/gnutls/recv.2) will probably be ok. The callback should return 0 on connection termination, a positive number indicating the number of bytes received, and -1 on error.

*gnutls\_pull\_func* is of the form, ssize\_t (\*gnutls\_pull\_func)(gnutls\_transport\_ptr\_t, void\*, size\_t);

# [REPORTING BUGS](#REPORTING_BUGS)

Report bugs to <bugs@gnutls.org>.  
Home page: https://www.gnutls.org

# [COPYRIGHT](#COPYRIGHT)

Copyright © 2001-2023 Free Software Foundation, Inc., and others.  
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

# [SEE ALSO](#SEE_ALSO)

The full documentation for **gnutls** is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit

[https://www.gnutls.org/manual/](https://www.gnutls.org/manual/)

3.8.13 gnutls

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Document: gnutls_transport_set_pull_function(3) from gnutls 3.8.13-r1 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls