explain_getresuid_or_die(3)

get r/e/s user IDs and report errors

Section 3 libexplain-dev bookworm source

Description

explain_getresuid_or_die

NAME

explain_getresuid_or_die - get r/e/s user IDs and report errors

SYNOPSIS

#include <libexplain/getresuid.h>
void explain_getresuid_or_die(uid_t *ruid, uid_t *euid, uid_t *suid);
int explain_getresuid_on_error(uid_t *ruid, uid_t *euid, uid_t *suid);

DESCRIPTION

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

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

	ruid		The ruid, exactly as to be passed to the getresuid(2) system call.
	euid		The euid, exactly as to be passed to the getresuid(2) system call.
	suid		The suid, exactly as to be passed to the getresuid(2) system call.

RETURN VALUE

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

The explain_getresuid_on_error function always returns the value return by the wrapped getresuid(2) system call.

EXAMPLE

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

explain_getresuid_or_die(ruid, euid, suid);