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/*
* Instantatiate a private user environment for the calling thread.
*
* Submitted by: fernando.ruiz@ctv.es (correo@fernando-ruiz.com)
*
* COPYRIGHT (c) 1989-2000.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h> /* free */
#include <rtems.h>
#include <rtems/libio.h>
#include <rtems/libio_.h>
rtems_status_code rtems_libio_set_private_env(void) {
rtems_status_code sc;
rtems_id task_id;
sc=rtems_task_ident(RTEMS_SELF,0,&task_id);
if (sc != RTEMS_SUCCESSFUL) return sc;
/* Only for the first time a malloc is necesary */
if (rtems_current_user_env==&rtems_global_user_env) {
sc = rtems_task_variable_add(RTEMS_SELF,(void*)&rtems_current_user_env,free);
if (sc != RTEMS_SUCCESSFUL) return sc;
rtems_current_user_env = malloc(sizeof(rtems_user_env_t));
if (!rtems_current_user_env)
return RTEMS_NO_MEMORY;
};
/* the side effect desired . chroot("/") */
*rtems_current_user_env = rtems_global_user_env; /* get the global values*/
rtems_current_user_env->task_id=task_id; /* mark the local values*/
return RTEMS_SUCCESSFUL;
}
/*
* Share a same private environment beetween two task:
* Task_id (remote) and RTEMS_SELF(current).
*/
rtems_status_code rtems_libio_share_private_env(rtems_id task_id) {
rtems_status_code sc;
rtems_user_env_t * shared_user_env;
rtems_id current_task_id;
sc=rtems_task_ident(RTEMS_SELF,0,¤t_task_id);
if (sc != RTEMS_SUCCESSFUL) return sc;
if (rtems_current_user_env->task_id==current_task_id) {
/* kill the current user env & task_var*/
free(rtems_current_user_env);
sc = rtems_task_variable_delete(RTEMS_SELF,(void*)&rtems_current_user_env);
if (sc != RTEMS_SUCCESSFUL) return sc;
};
sc = rtems_task_variable_get(task_id,(void*)&rtems_current_user_env,
(void*)&shared_user_env );
if (sc != RTEMS_SUCCESSFUL) return sc;
/* don't free(NULL'ed) at the task_delete. It is a shared var... */
sc = rtems_task_variable_add(RTEMS_SELF,(void*)&rtems_current_user_env,NULL);
if (sc != RTEMS_SUCCESSFUL) return sc;
/* the current_user_env is the same pointer that remote env */
rtems_current_user_env = shared_user_env;
return RTEMS_SUCCESSFUL;
}
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