---
name: "explain_setregid_or_die"
section: "3"
platform: "linux"
package: "libexplain-dev"
version: "1.4.D001-16"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/explain_setregid_or_die"
---

# explain\_setregid\_or\_die(3)

set real and/or effective group ID and report errors

## NAME

explain\_setregid\_or\_die - set real and/or effective group ID and report errors

## SYNOPSIS

\#include \<libexplain/setregid.h\>

void explain\_setregid\_or\_die(gid\_t rgid, gid\_t egid);\
 int explain\_setregid\_on\_error(gid\_t rgid, gid\_t egid);

## DESCRIPTION

The **explain\_setregid\_or\_die** function is used to call the [*setregid*(2)](/setregid/2.md) system call. On failure an explanation will be printed to *stderr*, obtained from the [*explain\_setregid*(3)](/explain_setregid/3.md) function, and then the process terminates by calling `exit(EXIT_FAILURE)`.

The **explain\_setregid\_on\_error** function is used to call the [*setregid*(2)](/setregid/2.md) system call. On failure an explanation will be printed to *stderr*, obtained from the [*explain\_setregid*(3)](/explain_setregid/3.md) function, but still returns to the caller.

- *rgid*

  The rgid, exactly as to be passed to the [*setregid*(2)](/setregid/2.md) system call.

- *egid*

  The egid, exactly as to be passed to the [*setregid*(2)](/setregid/2.md) system call.

## RETURN VALUE

The **explain\_setregid\_or\_die** function only returns on success, see [*setregid*(2)](/setregid/2.md) for more information. On failure, prints an explanation and exits, it does not return.

The **explain\_setregid\_on\_error** function always returns the value return by the wrapped [*setregid*(2)](/setregid/2.md) system call.

## EXAMPLE

The **explain\_setregid\_or\_die** function is intended to be used in a fashion similar to the following example:

```
explain_setregid_or_die(rgid, egid);
```

## SEE ALSO

- [*setregid*(2)](/setregid/2.md)

  set real and/or effective group ID

- [*explain\_setregid*(3)](/explain_setregid/3.md)

  explain [*setregid*(2)](/setregid/2.md) errors

- [*exit*(2)](/exit/2.md)

  terminate the calling process

## COPYRIGHT

libexplain version 1.4\
 Copyright (C) 2012 Peter Miller