apparmor/libraries/libapparmor/src/apparmor.h

/*
 * Copyright (c) 2003-2008 Novell, Inc. (All rights reserved)
 * Copyright 2009-2010 Canonical Ltd.
 *
 * The libapparmor library is licensed under the terms of the GNU
 * Lesser General Public License, version 2.1. Please see the file
 * COPYING.LGPL.
 *
 * This library 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _SYS_APPARMOR_H_
#define _SYS_APPARMOR_H	1

#include <sys/types.h>

__BEGIN_DECLS

/* Prototypes for apparmor state queries */
extern int aa_is_enabled(void);
extern int aa_find_mountpoint(char **mnt);

/* Prototypes for self directed domain transitions
 * see <http://apparmor.net>
 * Please see the change_hat(2) manpage for information.
 */

#define change_hat(X, Y) aa_change_hat((X), (Y))
extern int (change_hat)(const char *subprofile, unsigned int magic_token);
extern int aa_change_hat(const char *subprofile, unsigned long magic_token);
extern int aa_change_profile(const char *profile);
extern int aa_change_onexec(const char *profile);

extern int aa_change_hatv(const char *subprofiles[], unsigned long token);
extern int (aa_change_hat_vargs)(unsigned long token, int count, ...);

/* Protypes for introspecting task confinement
 * Please see the aa_getcon(2) manpage for information
 */
extern int aa_getprocattr_raw(pid_t tid, const char *attr, char *buf, int len,
			      char **mode);
extern int aa_getprocattr(pid_t tid, const char *attr, char **buf, char **mode);
extern int aa_gettaskcon(pid_t target, char **con, char **mode);
extern int aa_getcon(char **con, char **mode);
extern int aa_getpeercon_raw(int fd, char *buffer, int *size);
extern int aa_getpeercon(int fd, char **con);

#define __macroarg_counter(Y...) __macroarg_count1 ( , ##Y)
#define __macroarg_count1(Y...) __macroarg_count2 (Y, 16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
#define __macroarg_count2(_,x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,n,Y...) n

/**
 * change_hat_vargs - a wrapper macro for change_hat_vargs
 * @T: the magic token
 * @X...: the parameter list of hats being passed
 *
 * The change_hat_vargs macro makes it so the caller doesn't have to
 * specify the number of hats passed as parameters to the change_hat_vargs
 * fn.
 *
 * eg.
 * change_hat_vargs(10, hat1, hat2, hat3, hat4);
 * expandes to
 * (change_hat_vargs)(10, 4, hat1, hat2, hat3, hat4);
 *
 * to call change_hat_vargs direction do
 * (change_hat_vargs)(token, nhats, hat1, hat2...)
 */
#define aa_change_hat_vargs(T, X...) \
	(aa_change_hat_vargs)(T, __macroarg_counter(X), X)

__END_DECLS

#endif	/* sys/apparmor.h */