---
name: "nng_log_set_facility"
section: "3"
platform: "linux"
package: "libnng-dev"
version: "1.10.1-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nng_log_set_facility"
---

# nng\_log\_set\_facility(3)

set facility used for log messages

## NAME

nng\_log\_set\_facility - set facility used for log messages

## SYNOPSIS

```
#include <nng/nng.h>
typedef enum nng_log_facility {
        NNG_LOG_USER   = 1,
        NNG_LOG_DAEMON = 3,
        NNG_LOG_AUTH   = 10,
        NNG_LOG_LOCAL0 = 16,
        NNG_LOG_LOCAL1 = 17,
        NNG_LOG_LOCAL2 = 18,
        NNG_LOG_LOCAL3 = 19,
        NNG_LOG_LOCAL4 = 20,
        NNG_LOG_LOCAL5 = 21,
        NNG_LOG_LOCAL6 = 22,
        NNG_LOG_LOCAL7 = 23,
} nng_log_facility;
void nng_log_set_facility(nng_log_facility facility);
```

## DESCRIPTION

The `nng_log_set_facility` is used to set the *facility* of the application posting logs. This is used to assist with directing log content when handled by services such as `syslog`.

Note that while the log levels used here overlap with common levels used by the syslog facility on POSIX systems, applications should not rely on this.

## SEE ALSO

[nng\_log\_set\_level(3)](/nng_log_set_level/3.md)