/*
* 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
}
/** @}
*/