/* * Copyright (c) 2006 Jakub Jermar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup libc * @{ */ /** * @file cap.c * @brief Functions to grant/revoke capabilities to/from a task. */ #include #include #include /** Grant capabilities to a task. * * @param id Destination task ID. * @param caps Capabilities to grant. * * @return Zero on success or a value from @ref errno.h on failure. * */ int cap_grant(task_id_t id, unsigned int caps) { #ifdef __32_BITS__ sysarg64_t arg = (sysarg64_t) id; return __SYSCALL2(SYS_CAP_GRANT, (sysarg_t) &arg, (sysarg_t) caps); #endif #ifdef __64_BITS__ return __SYSCALL2(SYS_CAP_GRANT, (sysarg_t) id, (sysarg_t) caps); #endif } /** Revoke capabilities from a task. * * @param id Destination task ID. * @param caps Capabilities to revoke. * * @return Zero on success or a value from @ref errno.h on failure. * */ int cap_revoke(task_id_t id, unsigned int caps) { #ifdef __32_BITS__ sysarg64_t arg = (sysarg64_t) id; return __SYSCALL2(SYS_CAP_REVOKE, (sysarg_t) &arg, (sysarg_t) caps); #endif #ifdef __64_BITS__ return __SYSCALL2(SYS_CAP_REVOKE, (sysarg_t) id, (sysarg_t) caps); #endif } /** @} */