---
name: "gnutls_transport_set_errno"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_transport_set_errno"
---

# gnutls\_transport\_set\_errno(3)

API function

## NAME

gnutls\_transport\_set\_errno - API function

## SYNOPSIS

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

**void gnutls\_transport\_set\_errno(gnutls\_session\_t** *session***, int** *err***);**

## ARGUMENTS

- gnutls\_session\_t session

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

- int err

  error value to store in session-specific errno variable.

## DESCRIPTION

Store  *err* in the session-specific errno variable.  Useful values for  *err* are EINTR, EAGAIN and EMSGSIZE, other values are treated will be treated as real errors in the push/pull function.

This function is useful in replacement push and pull functions set by **gnutls\_transport\_set\_push\_function()** and **gnutls\_transport\_set\_pull\_function()** under Windows, where the replacements may not have access to the same  *errno* variable that is used by GnuTLS (e.g., the application is linked to msvcr71.dll and gnutls is linked to msvcrt.dll).

This function is unreliable if you are using the same\
  *session* in different threads for sending and receiving.

## REPORTING BUGS

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

## 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

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/