/* * $Id: cap_flag.c,v 1.1 2003/01/03 02:16:17 jwm Exp $ * * Copyright (c) 1997-8 Andrew G. Morgan <morgan@linux.kernel.org> * * See end of file for Log. * * This file deals with flipping of capabilities on internal * capability sets as specified by POSIX.1e (formerlly, POSIX 6). */#include "libcap.h"/* * Return the state of a specified capability flag.  The state is * returned as the contents of *raised.  The capability is from one of * the sets stored in cap_d as specified by set and value */int cap_get_flag(cap_t cap_d, cap_value_t value, cap_flag_t set,		 cap_flag_value_t *raised){    /*     * Do we have a set and a place to store its value?     * Is it a known capability?     */    if (raised && good_cap_t(cap_d) && value >= 0 && value < __CAP_BITS	&& set >= 0 && set < NUMBER_OF_CAP_SETS) {	__cap_s *cap_p = (__cap_s *) (set*CAP_SET_SIZE				      + (__u8 *) &cap_d->set);	*raised = isset_cap(cap_p,value) ? CAP_SET:CAP_CLEAR;	return 0;    } else {	_cap_debug("invalid arguments");	errno = EINVAL;	return -1;    }}/* * raise/lower a selection of capabilities */int cap_set_flag(cap_t cap_d, cap_flag_t set,		 int no_values, cap_value_t *array_values,		 cap_flag_value_t raise){    /*     * Do we have a set and a place to store its value?     * Is it a known capability?     */    if (good_cap_t(cap_d) && no_values > 0 && no_values <= __CAP_BITS	&& (set >= 0) && (set < NUMBER_OF_CAP_SETS)	&& (raise == CAP_SET || raise == CAP_CLEAR) ) {	int i;	for (i=0; i<no_values; ++i) {	    if (array_values[i] < 0 || array_values[i] >= __CAP_BITS) {		_cap_debug("weird capability (%d) - skipped", array_values[i]);	    } else {		int value = array_values[i];		__cap_s *cap_p = (__cap_s *) (set*CAP_SET_SIZE					      + (__u8 *) &cap_d->set);		if (raise == CAP_SET) {		    cap_p->raise_cap(value);		} else {		    cap_p->lower_cap(value);		}	    }	}	return 0;    } else {	_cap_debug("invalid arguments");	errno = EINVAL;	return -1;    }}/* *  Reset the capability to be empty (nothing raised) */int cap_clear(cap_t cap_d){    if (good_cap_t(cap_d)) {	memset(&(cap_d->set), 0, sizeof(cap_d->set));	return 0;    } else {	_cap_debug("invalid pointer");	errno = EINVAL;	return -1;    }}/* * $Log: cap_flag.c,v $ * Revision 1.1  2003/01/03 02:16:17  jwm * * Turning mod_linuxprivs into a core module, mod_cap. This is by no means * complete. * * Revision 1.2  1999/09/07 23:14:19  macgyver * Updated capabilities library and model. * * Revision 1.1.1.1  1999/04/17 22:16:31  morgan * release 1.0 of libcap * * Revision 1.4  1998/09/20 23:07:59  morgan * fixed lower bound check on 'set'. * * Revision 1.3  1998/05/24 22:54:09  morgan * updated for 2.1.104 * * Revision 1.2  1997/04/28 00:57:11  morgan * fixes and zefram's patches * * Revision 1.1  1997/04/21 04:32:52  morgan * Initial revision * */