explain_setresgid_or_die(3)

set r/e/s group ID and report errors

Section 3 libexplain-dev bookworm source

Description

explain_setresgid_or_die

NAME

explain_setresgid_or_die - set r/e/s group ID and report errors

SYNOPSIS

#include <libexplain/setresgid.h>
void explain_setresgid_or_die(gid_t rgid, gid_t egid, gid_t sgid);
int explain_setresgid_on_error(gid_t rgid, gid_t egid, gid_t sgid);

DESCRIPTION

The explain_setresgid_or_die function is used to call the setresgid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setresgid(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_setresgid_on_error function is used to call the setresgid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setresgid(3) function, but still returns to the caller.

	rgid		The rgid, exactly as to be passed to the setresgid(2) system call.
	egid		The egid, exactly as to be passed to the setresgid(2) system call.
	sgid		The sgid, exactly as to be passed to the setresgid(2) system call.

RETURN VALUE

The explain_setresgid_or_die function only returns on success, see setresgid(2) for more information. On failure, prints an explanation and exits, it does not return.

The explain_setresgid_on_error function always returns the value return by the wrapped setresgid(2) system call.

EXAMPLE

The explain_setresgid_or_die function is intended to be used in a fashion similar to the following example:

explain_setresgid_or_die(rgid, egid, sgid);