explain_setresuid_or_die(3)

set r/e/s user ID and report errors

Section 3 libexplain-dev bookworm source

Description

explain_setresuid_or_die

NAME

explain_setresuid_or_die - set r/e/s user ID and report errors

SYNOPSIS

#include <libexplain/setresuid.h>
void explain_setresuid_or_die(uid_t ruid, uid_t euid, uid_t suid);
int explain_setresuid_on_error(uid_t ruid, uid_t euid, uid_t suid);

DESCRIPTION

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

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

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

RETURN VALUE

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

The explain_setresuid_on_error function always returns the value return by the wrapped setresuid(2) system call.

EXAMPLE

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

explain_setresuid_or_die(ruid, euid, suid);