#include "lslib.h"

#include <grp.h>
#include <pwd.h>
#include <unistd.h>
#include <errno.h>

void change_identity(const struct passwd* pw) {
	int res;

	res = initgroups(pw->pw_name, pw->pw_gid);
	endgrent();

	if (res != 0) {
		if (errno == ENOSYS && pw->pw_uid == getuid()) {
			return;
		}

		error("can't set groups");
	}

	xsetgid(pw->pw_gid);
	xsetuid(pw->pw_uid);
}