---
name: "sd_bus_get_method_call_timeout"
section: "3"
platform: "linux"
package: "libsystemd-dev"
version: "257.13-1~deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/sd_bus_set_method_call_timeout"
---

# sd\_bus\_get\_method\_call\_timeout(3)

Set or query the default D-Bus method call timeout of a bus object

Part of [sd\_bus\_set\_method\_call\_timeout(3)](/sd_bus_set_method_call_timeout/3.md).

## NAME

sd\_bus\_set\_method\_call\_timeout, sd\_bus\_get\_method\_call\_timeout - Set or query the default D-Bus method call timeout of a bus object

## SYNOPSIS

```
#include <systemd/sd-bus.h>
```

**int sd\_bus\_set\_method\_call\_timeout(sd\_bus \****bus***, uint64\_t** *usec***);**

**int sd\_bus\_get\_method\_call\_timeout(sd\_bus \****bus***, uint64\_t \****ret***);**

## DESCRIPTION

**sd\_bus\_set\_method\_call\_timeout()** sets the default D-Bus method call timeout of *bus* to *usec* microseconds.

**sd\_bus\_get\_method\_call\_timeout()** queries the default D-Bus method call timeout of *bus*. If no method call timeout was set using **sd\_bus\_set\_method\_call\_timeout()**, the timeout is read from the *$SYSTEMD\_BUS\_TIMEOUT* environment variable. If this environment variable is unset or does not contain a valid timeout, the implementation falls back to a predefined method call timeout of 25 seconds. Note that *$SYSTEMD\_BUS\_TIMEOUT* is read once and cached so callers should not rely on being able to change the default method call timeout at runtime by changing the value of *$SYSTEMD\_BUS\_TIMEOUT*. Instead, call **sd\_bus\_set\_method\_call\_timeout()** to change the default method call timeout.

## RETURN VALUE

On success, these functions return a non-negative integer. On failure, they return a negative errno-style error code.

### Errors

Returned errors may indicate the following problems:

**-EINVAL**

The parameters *bus* or *ret* are **NULL**.

Added in version 246.

**-ENOPKG**

Bus object *bus* could not be resolved.

Added in version 246.

## NOTES

Functions described here are available as a shared library, which can be compiled against and linked to with the **libsystemd** [**pkg-config**(1)](/pkg-config/1.md) file.

The code described here uses [**getenv**(3)](/getenv/3.md), which is declared to be not multi-thread-safe. This means that the code calling the functions described here must not call [**setenv**(3)](/setenv/3.md) from a parallel thread. It is recommended to only do calls to **setenv()** from an early phase of the program when no other threads have been started.

## HISTORY

**sd\_bus\_set\_method\_call\_timeout()** and **sd\_bus\_get\_method\_call\_timeout()** were added in version 246.

## SEE ALSO

[**systemd**(1)](/systemd/1.md), [**sd-bus**(3)](/sd-bus/3.md), [**sd\_bus\_call**(3)](/sd_bus_call/3.md)