/* * 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 perm.c * @brief Functions to grant/revoke permissions to/from a task. */ #include <perm.h> #include <task.h> #include <libc.h> #include <types/common.h> /** Grant permissions to a task. * * @param id Destination task ID. * @param perms Permissions to grant. * * @return Zero on success or a value from @ref errno.h on failure. * */ errno_t perm_grant(task_id_t id, unsigned int perms) { #ifdef __32_BITS__ sysarg64_t arg = (sysarg64_t) id; return (errno_t) __SYSCALL2(SYS_PERM_GRANT, (sysarg_t) &arg, (sysarg_t) perms); #endif #ifdef __64_BITS__ return (errno_t) __SYSCALL2(SYS_PERM_GRANT, (sysarg_t) id, (sysarg_t) perms); #endif } /** Revoke permissions from a task. * * @param id Destination task ID. * @param perms Permissions to revoke. * * @return Zero on success or a value from @ref errno.h on failure. * */ errno_t perm_revoke(task_id_t id, unsigned int perms) { #ifdef __32_BITS__ sysarg64_t arg = (sysarg64_t) id; return (errno_t) __SYSCALL2(SYS_PERM_REVOKE, (sysarg_t) &arg, (sysarg_t) perms); #endif #ifdef __64_BITS__ return (errno_t) __SYSCALL2(SYS_PERM_REVOKE, (sysarg_t) id, (sysarg_t) perms); #endif } /** @} */