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[/] [or1k/] [trunk/] [rtems-20020807/] [cpukit/] [libcsupport/] [src/] [privateenv.c] - Rev 1026
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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. * * privateenv.c,v 1.3 2002/01/06 20:11:37 joel Exp */ #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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