/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Intel Corporation Author: Auke Kok <auke-jan.h.kok@intel.com> systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <unistd.h> #include <string.h> #ifdef HAVE_XATTR #include <attr/xattr.h> #endif #include "smack-util.h" bool use_smack(void) { #ifdef HAVE_SMACK static int use_smack_cached = -1; if (use_smack_cached < 0) use_smack_cached = access("/sys/fs/smackfs/", F_OK) >= 0; return use_smack_cached; #else return false; #endif } int smack_label_path(const char *path, const char *label) { #ifdef HAVE_SMACK if (!use_smack()) return 0; if (label) return setxattr(path, "security.SMACK64", label, strlen(label), 0); else return lremovexattr(path, "security.SMACK64"); #else return 0; #endif } int smack_label_fd(int fd, const char *label) { #ifdef HAVE_SMACK if (!use_smack()) return 0; return fsetxattr(fd, "security.SMACK64", label, strlen(label), 0); #else return 0; #endif } int smack_label_ip_out_fd(int fd, const char *label) { #ifdef HAVE_SMACK if (!use_smack()) return 0; return fsetxattr(fd, "security.SMACK64IPOUT", label, strlen(label), 0); #else return 0; #endif } int smack_label_ip_in_fd(int fd, const char *label) { #ifdef HAVE_SMACK if (!use_smack()) return 0; return fsetxattr(fd, "security.SMACK64IPIN", label, strlen(label), 0); #else return 0; #endif }