src/libcaptive/sandbox/split.c

   1 /* $Id$
   2  * Connection of captive-vfs interface through CORBA/ORBit
   3  * Copyright (C) 2002 Jan Kratochvil <project-captive@jankratochvil.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; exactly version 2 of June 1991 is required
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20 #include "config.h"
  21
  22 #include "split.h"      /* self */
  23 #include "sandbox.h"
  24 #include "server-GLogFunc.h"
  25 #include "captive/macros.h"
  26 #include <glib/gmacros.h>
  27 #include <stdlib.h>
  28 #include "captive/rtl-file.h"
  29 #include <unistd.h>
  30 #include <fcntl.h>
  31 #include "server-Directory.h"
  32 #include "server-Vfs.h"
  33 #include "../client/vfs.h"
  34 #include "parent-Vfs.h"
  35 #include <dirent.h>
  36 #include "server-CaptiveIOChannel.h"
  37 #include <errno.h>
  38 #include "../client/giochannel-blind.h" /* for captive_giochannel_blind_new() */
  39 #include <signal.h>
  40 #include "../storage/relastblock.h"     /* for captive_storage_relastblock() */
  41
  42 #ifdef HAVE_ORBIT_LINK
  43 void link_set_tmpdir(const char *dir);
  44 #else
  45 #include <linc/linc.h>  /* for linc_main_get_loop() */
  46 #endif
  47
  48
  49 /* CONFIG: */
  50
  51 #define HEARTBEAT_SOURCE_CHECK_EVENTS (G_IO_IN|G_IO_PRI)
  52 #define HEARTBEAT_SOURCE_CHECK_REVENTS (HEARTBEAT_SOURCE_CHECK_EVENTS|G_IO_ERR|G_IO_HUP|G_IO_NVAL)
  53
  54
  55 gboolean validate_CORBA_Environment(CORBA_Environment *evp)
  56 {
  57         if (evp->_major==CORBA_NO_EXCEPTION)
  58                 return TRUE;
  59
  60         g_error(_("CORBA Exception occured: id=\"%s\", value=%p"),
  61                         CORBA_exception_id(evp),CORBA_exception_value(evp));
  62         CORBA_exception_free(evp);
  63         return FALSE;
  64 }
  65
  66 CORBA_Environment captive_corba_ev;
  67 CORBA_ORB captive_corba_orb;
  68 PortableServer_POA captive_corba_poa;
  69
  70 static void corba_shutdown_atexit(void);
  71
  72 static gboolean corba_init(const char *pname,CORBA_Environment *evp,CORBA_ORB *orbp,PortableServer_POA *poap)
  73 {
  74 static gboolean done=FALSE;
  75 int orb_argc=1;
  76 gchar *orb_argv[]={
  77                 (gchar *)captive_strdup_alloca(pname),
  78                 NULL};
  79
  80         g_return_val_if_fail(evp!=NULL,FALSE);
  81         g_return_val_if_fail(orbp!=NULL,FALSE);
  82         g_return_val_if_fail(poap!=NULL,FALSE);
  83
  84         if (done)
  85                 return TRUE;    /* FIXME: '*poap' is left invalid! */
  86
  87         /* Init 'ev' */
  88         CORBA_exception_init(evp);
  89
  90         /* Init 'orb' */
  91         /* libcaptive is single-threaded only, caller must lock it.
  92          * If thread A spawned the sandbox while currently doing its own work
  93          * and thread B calls the sandbox thread B waits on ORB_run()
  94          * while the sandbox waits for the response of thread A ORB. Deadlock.
  95          * "orbit-local-non-threaded-orb" requests thread unaware ORB.
  96          */
  97         *orbp=CORBA_ORB_init(&orb_argc,orb_argv,"orbit-local-non-threaded-orb",evp);
  98         g_return_val_if_fail(*orbp!=CORBA_OBJECT_NIL,FALSE);
  99         g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
 100
 101         /* Init 'poa' */
 102         *poap=(PortableServer_POA)CORBA_ORB_resolve_initial_references(*orbp,"RootPOA",evp);
 103         g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
 104         {
 105 PortableServer_POAManager poa_mgr;
 106                 poa_mgr=PortableServer_POA__get_the_POAManager(*poap,evp);
 107                 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
 108                 PortableServer_POAManager_activate(poa_mgr,evp);
 109                 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
 110                 CORBA_Object_release((CORBA_Object)poa_mgr,evp);
 111                 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
 112                 }
 113
 114         g_atexit(corba_shutdown_atexit);
 115
 116         done=TRUE;
 117         return TRUE;
 118 }
 119
 120
 121 static CORBA_ORB heartbeat_source_callback_orb=CORBA_OBJECT_NIL;
 122
 123 gboolean corba_shutdown(CORBA_Environment *evp,CORBA_ORB *orbp,PortableServer_POA *poap)
 124 {
 125 PortableServer_POA poa;
 126 CORBA_ORB orb;
 127
 128         g_return_val_if_fail(evp!=NULL,FALSE);
 129         g_return_val_if_fail(orbp!=NULL,FALSE);
 130         g_return_val_if_fail(poap!=NULL,FALSE);
 131
 132         /* Shutdown 'poa' */
 133         poa=*poap;
 134         *poap=CORBA_OBJECT_NIL;
 135         CORBA_Object_release((CORBA_Object)poa,evp);
 136         g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
 137
 138         /* Shutdown 'orb' */
 139         orb=*orbp;
 140         *orbp=CORBA_OBJECT_NIL;
 141         heartbeat_source_callback_orb=CORBA_OBJECT_NIL;
 142         CORBA_ORB_destroy(orb,evp);
 143         /* Do not: g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
 144          * here as CORBA_ORB_destroy() sometimes reports:
 145          *      WARNING **: ORB: a total of X refs to X ORB objects were leaked
 146          */
 147         CORBA_exception_free(evp);
 148
 149         /* Shutdown 'ev' */
 150         CORBA_exception_free(evp);
 151
 152         return TRUE;
 153 }
 154
 155 static void sandbox_parent_own_orbit_dir_cleanup_atexit(void);
 156
 157 static void corba_shutdown_atexit(void)
 158 {
 159 gboolean errbool;
 160
 161         errbool=corba_shutdown(&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
 162         g_assert(errbool==TRUE);
 163
 164         /* Delete the CORBA ORB socket directory only after full CORBA ORB shutdown. */
 165         sandbox_parent_own_orbit_dir_cleanup_atexit();
 166 }
 167
 168
 169 static GSource *captive_corba_sandbox_child_heartbeat_gsource;
 170
 171 #if 0   /* Currently unused - see server-Vfs.c:impl_Captive_Vfs_shutdown() */
 172 void sandbox_child_prepare_shutdown(void)
 173 {
 174         /* Prevent during shutdown: Captive-WARNING **: CORBA Exception occured: id="IDL:omg.org/CORBA/COMM_FAILURE:1.0" */
 175         if (captive_corba_sandbox_child_heartbeat_gsource) {
 176                 g_source_destroy(captive_corba_sandbox_child_heartbeat_gsource);
 177                 g_source_unref(captive_corba_sandbox_child_heartbeat_gsource);
 178                 captive_corba_sandbox_child_heartbeat_gsource=NULL;
 179                 }
 180 }
 181 #endif
 182
 183 GMainLoop *captive_corba_get_loop(void)
 184 {
 185 #ifdef HAVE_ORBIT_LINK
 186 static GMainLoop *link_loop;
 187
 188         if (!link_loop)
 189                 link_loop=g_main_loop_new(g_main_context_default(),TRUE);
 190         return link_loop;
 191 #else
 192         return linc_main_get_loop();
 193 #endif
 194 }
 195
 196 GMainContext *captive_corba_get_context(void)
 197 {
 198         return g_main_loop_get_context(captive_corba_get_loop());
 199 }
 200
 201 void sandbox_child_shutdown(void)
 202 {
 203         /* Do not fail by passing logging messages to the master. */
 204         impl_Captive_Vfs_init_g_log_func_disable();
 205
 206         g_main_loop_quit(captive_corba_get_loop());
 207 }
 208
 209
 210 static gboolean heartbeat_source_callback(gpointer data /* unused */)
 211 {
 212         g_return_val_if_fail(heartbeat_source_callback_orb!=CORBA_OBJECT_NIL,FALSE);    /* the source should be removed */
 213
 214         sandbox_child_shutdown();
 215
 216         return FALSE;   /* the source should be removed */
 217 }
 218
 219
 220 static gboolean heartbeat_source_prepare(GSource *source,gint *timeout)
 221 {
 222         *timeout=-1;
 223
 224         return FALSE;
 225 }
 226
 227 static GPollFD heartbeat_source_check_gpollfd;
 228
 229 static gboolean heartbeat_source_check(GSource *source)
 230 {
 231         return !!(heartbeat_source_check_gpollfd.revents & HEARTBEAT_SOURCE_CHECK_REVENTS);
 232 }
 233
 234 static gboolean heartbeat_source_dispatch(GSource *source,GSourceFunc callback,gpointer user_data)
 235 {
 236         g_assert(callback!=NULL);
 237         return (*callback)(user_data);
 238 }
 239
 240 static GSourceFuncs heartbeat_source_watch_funcs={
 241                 heartbeat_source_prepare,
 242                 heartbeat_source_check,
 243                 heartbeat_source_dispatch,
 244                 NULL,   /* finalize */
 245                 };
 246
 247 void captive_corba_sandbox_child(const gchar *chrooted_orbit_dir)
 248 {
 249 Captive_Vfs Vfs_object;
 250 impl_POA_Captive_Vfs *Vfs_servant;
 251 gboolean errbool;
 252 guint errguint;
 253 int errint;
 254
 255         /* attach heartbeat_source_callback() to watch for any abnormalities
 256          * on our open pipe 'parentheart_fds' and terminate the child if parent dies.
 257          */
 258         captive_corba_sandbox_child_heartbeat_gsource=g_source_new(&heartbeat_source_watch_funcs,sizeof(GSource));
 259         g_return_if_fail(captive_corba_sandbox_child_heartbeat_gsource!=NULL);
 260         g_source_set_callback(
 261                         captive_corba_sandbox_child_heartbeat_gsource,  /* source */
 262                         heartbeat_source_callback,      /* func */
 263                         NULL,   /* data */
 264                         NULL);  /* notify */
 265         heartbeat_source_check_gpollfd.fd=0 /* STDIN */;        /* parentheart_fd_read */
 266         heartbeat_source_check_gpollfd.events=HEARTBEAT_SOURCE_CHECK_EVENTS;
 267         heartbeat_source_check_gpollfd.revents=0;
 268         g_source_add_poll(captive_corba_sandbox_child_heartbeat_gsource,&heartbeat_source_check_gpollfd);
 269
 270         errbool=corba_init("captive-sandbox-child",&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
 271         g_return_if_fail(errbool==TRUE);
 272
 273         heartbeat_source_callback_orb=captive_corba_orb;
 274
 275         /* captive_corba_get_context() makes sense only after corba_init() -> CORBA_ORB_init() */
 276         errguint=g_source_attach(
 277                         captive_corba_sandbox_child_heartbeat_gsource,  /* source */
 278                         captive_corba_get_context());   /* context; NULL means 'default context' */
 279         g_assert(errguint!=0);
 280
 281         /* Init 'Vfs_object' */
 282         Vfs_object=impl_Captive_Vfs__create(captive_corba_poa,&captive_corba_ev);
 283         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 284
 285         /* Pass IOR to our parent.
 286          * It will also create the socket needed for 'chrooted_orbit_dir' below
 287          * by CORBA_ORB_object_to_string()->ORBit_marshal_object()->IOP_generate_profiles()->ORBit_ORB_start_servers...
 288          */
 289         {
 290 char *Vfs_IOR;
 291                 Vfs_IOR=CORBA_ORB_object_to_string(captive_corba_orb,Vfs_object,&captive_corba_ev);
 292                 g_assert(validate_CORBA_Environment(&captive_corba_ev));
 293                 g_assert(Vfs_IOR!=NULL);
 294                 errint=printf("ior=%s\n",Vfs_IOR);
 295                 g_assert(errint>=0);
 296                 CORBA_free(Vfs_IOR);
 297                 }
 298
 299         /* Default mode is 0700, permit parent non-"captive" users to access our IOR socket. */
 300         if (chrooted_orbit_dir) {
 301 DIR *dir;
 302 struct dirent *dirent;
 303 const gchar *socketname=NULL,*socketpathname;
 304
 305                 errint=chmod(chrooted_orbit_dir,0755);
 306                 g_assert(errint==0);
 307
 308                 dir=opendir(chrooted_orbit_dir);
 309                 g_assert(dir!=NULL);
 310                 while (errno=0,(dirent=readdir(dir))) {
 311                         if (!strcmp(dirent->d_name,".") || !strcmp(dirent->d_name,".."))
 312                                 continue;
 313                         g_assert(socketname==NULL);
 314                         socketname=captive_strdup_alloca(dirent->d_name);
 315                         }
 316                 g_assert(errno==0);
 317                 errint=closedir(dir);
 318                 g_assert(errint==0);
 319                 g_assert(socketname!=NULL);
 320
 321                 socketpathname=captive_printf_alloca("%s/%s",chrooted_orbit_dir,socketname);
 322                 errint=chmod(socketpathname,0666);
 323                 g_assert(errint==0);
 324
 325                 printf("socketname=%s\n",socketname);
 326                 }
 327
 328         /* Close the output to flush it to our spawning parent. */
 329         errint=fflush(stdout);
 330         g_assert(errint==0);
 331         errint=fclose(stdout);
 332         g_assert(errint==0);
 333
 334         /* CORBA_ORB_run() -> linc_main_loop_run() -> g_main_loop_run()
 335          * and therefore we should be safe with glib events handling.
 336          */
 337 #ifdef HAVE_ORBIT_LINK
 338         g_main_loop_run(captive_corba_get_loop());
 339 #else
 340         CORBA_ORB_run(captive_corba_orb,&captive_corba_ev);
 341         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 342 #endif
 343
 344         /* Shutdown 'Vfs' servant */
 345         Vfs_servant=PortableServer_POA_reference_to_servant(captive_corba_poa,Vfs_object,&captive_corba_ev);
 346         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 347         CORBA_Object_release(Vfs_object,&captive_corba_ev);
 348         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 349         impl_Captive_Vfs__destroy(Vfs_servant,&captive_corba_ev);
 350         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 351
 352         errbool=corba_shutdown(&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
 353         g_assert(errbool==TRUE);
 354
 355         _exit(EXIT_SUCCESS);
 356 }
 357
 358
 359 static void options_module_captive_to_options_module_corba
 360                 (Captive_CaptiveOptionsModule *dest_options_module_corba,const struct captive_options_module *src_options_module_captive)
 361 {
 362         g_return_if_fail(dest_options_module_corba!=NULL);
 363         g_return_if_fail(src_options_module_captive!=NULL);
 364
 365         g_return_if_fail(src_options_module_captive->type==CAPTIVE_OPTIONS_MODULE_TYPE_PE32);
 366
 367         dest_options_module_corba->pathname_utf8=CORBA_string_dup(src_options_module_captive->pathname_utf8);
 368         dest_options_module_corba->data._maximum=src_options_module_captive->u.pe32.length;
 369         dest_options_module_corba->data._length =src_options_module_captive->u.pe32.length;
 370         dest_options_module_corba->data._buffer=Captive_Bytes_allocbuf(dest_options_module_corba->data._maximum);
 371         memcpy(dest_options_module_corba->data._buffer,src_options_module_captive->u.pe32.base,
 372                         src_options_module_captive->u.pe32.length);
 373         dest_options_module_corba->data._release=TRUE;
 374 }
 375
 376 static void unlink_nonrecursive(const gchar *dirname)
 377 {
 378 DIR *dir;
 379 struct dirent *dirent;
 380 int errint;
 381
 382         dir=opendir(dirname);
 383         g_assert(dir!=NULL);
 384
 385         while (errno=0,(dirent=readdir(dir))) {
 386 gchar *pathname;
 387
 388                 if (!strcmp(dirent->d_name,".") || !strcmp(dirent->d_name,".."))
 389                         continue;
 390                 pathname=g_strdup_printf("%s/%s",dirname,dirent->d_name);
 391                 errint=unlink(pathname);
 392                 g_assert(errint==0);
 393                 g_free(pathname);
 394                 }
 395         g_assert(errno==0);
 396         errint=closedir(dir);
 397         g_assert(errint==0);
 398         errint=rmdir(dirname);
 399         g_assert(errint==0);
 400 }
 401
 402 static const gchar *sandbox_parent_own_orbit_dir;
 403 static const gchar *sandbox_parent_own_orbit_socket;
 404
 405 static void sandbox_parent_own_orbit_dir_cleanup_atexit(void)
 406 {
 407 static gboolean done=FALSE;
 408
 409         g_log(G_LOG_DOMAIN,G_LOG_LEVEL_DEBUG,"%s; done=%d",G_STRLOC,(int)done);
 410
 411         if (done)
 412                 return;
 413         done=TRUE;
 414
 415         if (sandbox_parent_own_orbit_dir)
 416                 unlink_nonrecursive(sandbox_parent_own_orbit_dir);
 417 }
 418
 419 static struct sandbox_parent_own_orbit_dir_cleanup_signal {
 420         int signum;
 421         /* FIXME: Why we cannot use 'sighandler_t'? */ void (*sighandler_orig)(int signum);
 422         } sandbox_parent_own_orbit_dir_cleanup_signals[]={
 423                 { SIGINT  },
 424                 { SIGQUIT },
 425                 { SIGTERM },
 426                 { SIGHUP  },
 427                 { SIGABRT },
 428                 { SIGFPE  },
 429                 };
 430
 431 static void sandbox_parent_own_orbit_dir_cleanup_sighandler(int signum)
 432 {
 433 struct sandbox_parent_own_orbit_dir_cleanup_signal *sigstructp;
 434
 435         for (
 436                         sigstructp=sandbox_parent_own_orbit_dir_cleanup_signals;
 437                         sigstructp<sandbox_parent_own_orbit_dir_cleanup_signals+G_N_ELEMENTS(sandbox_parent_own_orbit_dir_cleanup_signals);
 438                         sigstructp++) {
 439                 if (sigstructp->signum==signum)
 440                         break;
 441                 }
 442         g_assert(sigstructp<sandbox_parent_own_orbit_dir_cleanup_signals+G_N_ELEMENTS(sandbox_parent_own_orbit_dir_cleanup_signals));
 443         signal(signum,sigstructp->sighandler_orig);
 444
 445         /* Prevent recursive fatal logging before signal restore: */
 446         /* Do not: g_log(G_LOG_DOMAIN,G_LOG_LEVEL_DEBUG,"%s: signum=%d,sighandler_orig=%p",G_STRLOC,signum,sigstructp->sighandler_orig);
 447          * as it is dangerous to g_log() from sighandler.
 448          */
 449
 450         sandbox_parent_own_orbit_dir_cleanup_atexit();
 451
 452         /* Do not: g_log(G_LOG_DOMAIN,G_LOG_LEVEL_DEBUG,"%s: re-raising...",G_STRLOC);
 453          * as it is dangerous to g_log() from sighandler.
 454          */
 455         raise(signum);
 456 }
 457
 458 static void sandbox_parent_own_orbit_dir_cleanup_init(void)
 459 {
 460 struct sandbox_parent_own_orbit_dir_cleanup_signal *sigstructp;
 461
 462         for (
 463                         sigstructp=sandbox_parent_own_orbit_dir_cleanup_signals;
 464                         sigstructp<sandbox_parent_own_orbit_dir_cleanup_signals+G_N_ELEMENTS(sandbox_parent_own_orbit_dir_cleanup_signals);
 465                         sigstructp++) {
 466                 sigstructp->sighandler_orig=signal(sigstructp->signum,sandbox_parent_own_orbit_dir_cleanup_sighandler);
 467                 if (sigstructp->sighandler_orig==SIG_IGN)
 468                         sigstructp->sighandler_orig=SIG_DFL;
 469                 }
 470 }
 471
 472 static gchar *sandbox_parent_read_ior
 473                 (int Vfs_IOR_fd_read,gchar **child_chroot_pid_hashkey_dirp,CaptiveVfsParentObject *captive_vfs_parent_object)
 474 {
 475 gchar *data;
 476 gsize data_size;
 477 GHashTable *hash;
 478 gchar *ior,*child_chroot_pid_hashkey_dir;
 479 int errint;
 480 gchar *s,*sd,*se;
 481 gboolean errbool;
 482
 483         /* Initialize /tmp/orbit-$username directory for linking IOR socket. */
 484         errbool=corba_init("captive-sandbox-parent",&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
 485         g_assert(errbool==TRUE);
 486
 487         /* FIXME: Security: Duplicate giop_tmpdir_init() here. */
 488         if (!sandbox_parent_own_orbit_dir) {
 489                 /* FIXME: Make 'CAPTIVE_SANDBOX_CHROOT' configurable. */
 490                 sandbox_parent_own_orbit_dir=g_strdup_printf("%s/tmp/captive-orbit-%d",CAPTIVE_SANDBOX_CHROOT,getpid());
 491                 if (mkdir(sandbox_parent_own_orbit_dir,0700)) {
 492                         g_assert(errno==EEXIST);
 493                         sandbox_parent_own_orbit_dir_cleanup_init();
 494                         unlink_nonrecursive(sandbox_parent_own_orbit_dir);
 495                         if (mkdir(sandbox_parent_own_orbit_dir,0700))
 496                                 g_assert_not_reached();
 497                         }
 498                 sandbox_parent_own_orbit_dir_cleanup_init();
 499 #ifdef HAVE_ORBIT_LINK
 500                 link_set_tmpdir(sandbox_parent_own_orbit_dir);
 501 #else
 502                 linc_set_tmpdir(sandbox_parent_own_orbit_dir);
 503 #endif
 504                 }
 505
 506         data=captive_rtl_file_read(Vfs_IOR_fd_read,&data_size); /* data_fd_read */
 507         errint=close(Vfs_IOR_fd_read);
 508         g_assert(errint==0);
 509         g_assert(data!=NULL);
 510         g_assert(data_size>=1);
 511         g_assert(data[data_size-1]=='\n');
 512
 513         hash=g_hash_table_new(g_str_hash,g_str_equal);
 514
 515         for (s=data;s<data+data_size;s=se+1) {
 516                 se=strchr(s,'\n');
 517                 g_assert(se!=NULL);
 518                 *se=0;
 519                 sd=strchr(s,'=');
 520                 g_assert(sd!=NULL);
 521                 *sd=0;
 522                 g_hash_table_insert(hash,s,sd+1);
 523                 }
 524         g_assert(s==data+data_size);
 525
 526         if ((child_chroot_pid_hashkey_dir=g_hash_table_lookup(hash,"chroot_pid_hashkey_dir"))) {
 527 const gchar *socketname,*socketpathname_src,*socketpathname_dest;
 528 const gchar *chrooted_orbit_dir;
 529
 530                 /* IOR contains the full pathname with the setuid username encoded. */
 531                 chrooted_orbit_dir=g_hash_table_lookup(hash,"chrooted_orbit_dir");
 532                 g_assert(chrooted_orbit_dir!=NULL);
 533                 captive_vfs_parent_object->corba_chrooted_orbit_dir=g_strdup(chrooted_orbit_dir);
 534                 /* 0700 as this directory will not be reused
 535                  * to commuicate with any other sandbox child.
 536                  */
 537                 if (mkdir(chrooted_orbit_dir,0700)) {
 538                         g_assert(errno==EEXIST);
 539                         }
 540
 541                 socketname=g_hash_table_lookup(hash,"socketname");
 542                 g_assert(socketname!=NULL);
 543                 captive_vfs_parent_object->corba_socketname=g_strdup(socketname);
 544
 545                 socketpathname_src=captive_printf_alloca("%s/%s/%s",child_chroot_pid_hashkey_dir,chrooted_orbit_dir,socketname);
 546                 socketpathname_dest=g_strdup_printf("%s/%s",chrooted_orbit_dir,socketname);
 547                 errint=link(socketpathname_src,socketpathname_dest);
 548                 if (errint)
 549                         g_error("link(\"%s\",\"%s\")=%d:%m",socketpathname_src,socketpathname_dest,errint);
 550                 }
 551         if (child_chroot_pid_hashkey_dirp)
 552                 *child_chroot_pid_hashkey_dirp=g_strdup(child_chroot_pid_hashkey_dir);
 553
 554         ior=g_hash_table_lookup(hash,"ior");
 555         g_assert(ior!=NULL);
 556         ior=g_strdup(ior);
 557         g_free(data);
 558
 559         g_hash_table_destroy(hash);
 560
 561         return ior;
 562 }
 563
 564
 565 static xmlNode *options_module_captive_to_xml
 566                 (xmlNode *dest_xml_parent,const struct captive_options_module *src_options_module_captive)
 567 {
 568         g_return_val_if_fail(dest_xml_parent!=NULL,NULL);
 569         g_return_val_if_fail(src_options_module_captive!=NULL,NULL);
 570
 571         { xmlNode *module=xmlNewTextChild(dest_xml_parent,NULL,"module",NULL);
 572         const gchar *type_string="???"; /* Prevent: ... might be used uninitialized in this function */
 573         const gchar *basename,*cgs;
 574
 575                 basename=src_options_module_captive->pathname_utf8;
 576                 if ((cgs=strrchr(basename,'/')))
 577                         basename=cgs+1;
 578                 xmlNewProp(module,"basename",basename);
 579                 switch (src_options_module_captive->type) {
 580                         case CAPTIVE_OPTIONS_MODULE_TYPE_PE32:
 581                                 type_string="PE32";
 582                                 xmlNewProp(module,"length",captive_printf_alloca("%lu",(unsigned long)src_options_module_captive->u.pe32.length));
 583                                 xmlNewProp(module,"md5"   ,src_options_module_captive->u.pe32.md5);
 584                                 break;
 585                         case CAPTIVE_OPTIONS_MODULE_TYPE_GMODULE:
 586                                 type_string="gmodule";
 587                                 break;
 588                         default: g_assert_not_reached();
 589                         }
 590                 xmlNewProp(module,"type",type_string);  /* AFTER the 'switch' to set 'type_string'! */
 591                 return module;
 592                 }
 593 }
 594
 595
 596 static void sandbox_parent_bug_doc_make(CaptiveVfsParentObject *captive_vfs_parent_object)
 597 {
 598         { xmlDoc *doc=xmlNewDoc("1.0");
 599                 captive_vfs_parent_object->corba_bug_doc=doc;
 600                 { xmlNode *bug=xmlNewDocNode(captive_vfs_parent_object->corba_bug_doc,NULL,"bug",NULL);
 601                         xmlDocSetRootElement(captive_vfs_parent_object->corba_bug_doc,bug);
 602                         captive_vfs_parent_object->corba_bug=bug;
 603                         { xmlNode *bug_captive=xmlNewTextChild(bug,NULL,"captive",NULL);
 604                                 xmlNewProp(bug_captive,"version",VERSION);
 605                                 }
 606                         { xmlNode *bug_filesystem=xmlNewTextChild(bug,NULL,"filesystem",NULL);
 607                                 options_module_captive_to_xml(bug_filesystem,&CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.filesystem);
 608                                 }
 609                         { xmlNode *bug_load_module=xmlNewTextChild(bug,NULL,"load_module",NULL);
 610                         guint load_moduleui;
 611                         struct captive_options_module *options_module;
 612                         GList *load_module_node;
 613
 614                                 for (load_moduleui=0,load_module_node=CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.load_module;
 615                                                 load_module_node;
 616                                                 load_moduleui++,load_module_node=load_module_node->next) {
 617                                         options_module=load_module_node->data;
 618                                         options_module_captive_to_xml(bug_load_module,options_module);
 619                                         }
 620                                 }
 621                         { xmlNode *bug_action=xmlNewTextChild(bug,NULL,"action",NULL);
 622                                 captive_vfs_parent_object->corba_bug_action=bug_action;
 623                                 }
 624                         { xmlNode *bug_log=xmlNewTextChild(bug,NULL,"log",NULL);
 625                                 captive_vfs_parent_object->corba_bug_log=bug_log;
 626                                 }
 627                         }
 628                 }
 629 }
 630
 631
 632 static void sandbox_parent(const gchar *Vfs_IOR,const gchar *child_chroot_pid_hashkey_dir,CaptiveVfsParentObject *captive_vfs_parent_object)
 633 {
 634 Captive_Vfs Vfs_object;
 635 Captive_GLogFunc GLogFunc_object;
 636 Captive_CaptiveIOChannel CaptiveIOChannel_object;
 637 Captive_CaptiveOptions options_corba;
 638 guint load_module_length,load_moduleui;
 639 struct captive_options_module *options_module;
 640 GList *load_module_node;
 641 const gchar *child_chroot_parent_own_orbit_socket,*child_chroot_parent_own_orbit_dir;
 642 int errint;
 643
 644         g_return_if_fail(Vfs_IOR!=NULL);
 645         /* 'child_chroot_pid_hashkey_dir' may be NULL */
 646         g_return_if_fail(CAPTIVE_VFS_PARENT_IS_OBJECT(captive_vfs_parent_object));
 647
 648         Vfs_object=CORBA_ORB_string_to_object(captive_corba_orb,Vfs_IOR,&captive_corba_ev);
 649         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 650
 651         /* Init 'GLogFunc_object' */
 652         GLogFunc_object=impl_Captive_GLogFunc__create(captive_corba_poa,captive_vfs_parent_object,&captive_corba_ev);
 653         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 654
 655         /* Init 'CaptiveIOChannel_object' */
 656         if (!captive_vfs_parent_object->corba_parent_giochanel_blind_source) {
 657 GIOChannel *giochannel;
 658
 659                 giochannel=CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.image_iochannel;
 660                 g_io_channel_ref(giochannel);
 661
 662                 giochannel=captive_storage_relastblock(giochannel);
 663
 664                 switch (CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.rwmode) {
 665                         case CAPTIVE_OPTION_RWMODE_RO:
 666                         case CAPTIVE_OPTION_RWMODE_RW:
 667                                 break;
 668                         case CAPTIVE_OPTION_RWMODE_BLIND: {
 669 GIOChannel *giochannel_orig;
 670
 671                                 giochannel_orig=giochannel;
 672                                 giochannel=(GIOChannel *)captive_giochannel_blind_new(
 673                                                 giochannel,     /* giochannel_orig */
 674                                                 TRUE); /* writeable */
 675                                 g_io_channel_unref(giochannel_orig);    /* reffed by captive_giochannel_blind_new() */
 676                                 } break;
 677                         default: g_assert_not_reached();
 678                         }
 679                 captive_vfs_parent_object->corba_parent_giochanel_blind_source=giochannel;
 680                 }
 681
 682         if (!captive_vfs_parent_object->corba_parent_giochanel_blind)
 683                 captive_vfs_parent_object->corba_parent_giochanel_blind=(GIOChannel *)captive_giochannel_blind_new(
 684                                 captive_vfs_parent_object->corba_parent_giochanel_blind_source,  /* giochannel_orig */
 685                                 (CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.rwmode!=CAPTIVE_OPTION_RWMODE_RO)); /* writeable */
 686         CaptiveIOChannel_object=impl_Captive_CaptiveIOChannel__create(captive_corba_poa,
 687                         captive_vfs_parent_object->corba_parent_giochanel_blind,&captive_corba_ev);
 688         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 689
 690         /* Create the socket needed for 'sandbox_parent_own_orbit_socket' below
 691          * by CORBA_ORB_object_to_string()->ORBit_marshal_object()->IOP_generate_profiles()->ORBit_ORB_start_servers...
 692          */
 693         {
 694 char *GLogFunc_IOR;
 695                 GLogFunc_IOR=CORBA_ORB_object_to_string(captive_corba_orb,GLogFunc_object,&captive_corba_ev);
 696                 g_assert(validate_CORBA_Environment(&captive_corba_ev));
 697                 g_assert(GLogFunc_IOR!=NULL);
 698                 CORBA_free(GLogFunc_IOR);
 699                 }
 700
 701         if (sandbox_parent_own_orbit_dir && !sandbox_parent_own_orbit_socket) {
 702 DIR *dir;
 703 struct dirent *dirent;
 704
 705                 dir=opendir(sandbox_parent_own_orbit_dir);
 706                 g_assert(dir!=NULL);
 707
 708                 while (errno=0,(dirent=readdir(dir))) {
 709                         if (!strcmp(dirent->d_name,".") || !strcmp(dirent->d_name,".."))
 710                                 continue;
 711                         g_assert(sandbox_parent_own_orbit_socket==NULL);
 712                         sandbox_parent_own_orbit_socket=g_strdup_printf("%s/%s",sandbox_parent_own_orbit_dir,dirent->d_name);
 713                         }
 714                 g_assert(errno==0);
 715                 errint=closedir(dir);
 716                 g_assert(errint==0);
 717                 g_assert(sandbox_parent_own_orbit_socket!=NULL);
 718                 }
 719
 720         if (child_chroot_pid_hashkey_dir) {
 721 gchar *s;
 722
 723                 child_chroot_parent_own_orbit_dir=captive_printf_alloca("%s/%s",child_chroot_pid_hashkey_dir,sandbox_parent_own_orbit_dir);
 724                 s=(/* de-const */ gchar *)child_chroot_parent_own_orbit_dir;
 725                 do {
 726                         s=strchr(s,'/');
 727                         if (s)
 728                                 *s=0;
 729                         if (*child_chroot_parent_own_orbit_dir) {
 730                                 errint=mkdir(child_chroot_parent_own_orbit_dir,0777);
 731                                 if (errint)
 732                                         g_assert(errno==EEXIST);
 733                                 else {
 734                                         /* chmod(2) it to prevent mode limitation by
 735                                          * active ulimit(2) of being executed by mount(8).
 736                                          */
 737                                         errint=chmod(child_chroot_parent_own_orbit_dir,0777);
 738                                         g_assert(errint==0);
 739                                         }
 740                                 }
 741                         if (s)
 742                                 *s++='/';
 743                         } while (s);
 744                 child_chroot_parent_own_orbit_socket=captive_printf_alloca("%s/%s",
 745                                 child_chroot_pid_hashkey_dir,sandbox_parent_own_orbit_socket);
 746                 errint=link(sandbox_parent_own_orbit_socket,child_chroot_parent_own_orbit_socket);
 747                 g_assert(errint==0);
 748                 /* chmod(2)s also our orig. one (!) but this one is protected by its 0777 directory. */
 749                 errint=chmod(child_chroot_parent_own_orbit_socket,0666);
 750                 g_assert(errint==0);
 751                 }
 752
 753         options_corba.g_log_func=CORBA_Object_duplicate(GLogFunc_object,&captive_corba_ev);
 754         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 755
 756         options_module_captive_to_options_module_corba(&options_corba.filesystem,&CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.filesystem);
 757         /* Prevent secondary captive_giochannel_blind inside of our sandbox child
 758          * as we already have one captive_giochannel_blind in the parent.
 759          */
 760         options_corba.rwmode        =(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.rwmode == CAPTIVE_OPTION_RWMODE_BLIND ? CAPTIVE_OPTION_RWMODE_RW
 761                         : CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.rwmode);
 762         options_corba.media         =CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.media;
 763         options_corba.debug_messages=CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.debug_messages;
 764
 765         options_corba.image_iochannel=CORBA_Object_duplicate(CaptiveIOChannel_object,&captive_corba_ev);
 766         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 767
 768         load_module_length=g_list_length(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.load_module);
 769         options_corba.load_module._maximum=load_module_length;
 770         options_corba.load_module._length=load_module_length;
 771         options_corba.load_module._buffer=Captive_CaptiveOptionsModuleList_allocbuf(options_corba.load_module._maximum);
 772         options_corba.load_module._release=TRUE;
 773         for (load_moduleui=0,load_module_node=CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.load_module;
 774                         load_module_node;
 775                         load_moduleui++,load_module_node=load_module_node->next) {
 776                 options_module=load_module_node->data;
 777                 options_module_captive_to_options_module_corba(options_corba.load_module._buffer+load_moduleui,options_module);
 778                 }
 779
 780         Captive_Vfs_init(Vfs_object,&options_corba,&captive_corba_ev);
 781         g_assert(validate_CORBA_Environment(&captive_corba_ev));
 782
 783         Captive_CaptiveOptions__freekids(&options_corba,
 784                         NULL);  /* d; unused */
 785
 786         captive_vfs_parent_object->corba_Vfs_object=Vfs_object;
 787         captive_vfs_parent_object->corba_GLogFunc_object=GLogFunc_object;
 788         captive_vfs_parent_object->corba_CaptiveIOChannel_object=CaptiveIOChannel_object;
 789
 790         if (CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.bug_pathname)
 791                 sandbox_parent_bug_doc_make(captive_vfs_parent_object);
 792 }
 793
 794 static void fd_shiftup(int *fdp)
 795 {
 796         g_return_if_fail(fdp!=NULL);
 797
 798         while (*fdp<=2 /* STDERR */) {
 799                 *fdp=dup(*fdp);
 800                 g_assert(*fdp!=-1);
 801                 }
 802 }
 803
 804 void captive_sandbox_fd_closeup(int fd_first_to_delete)
 805 {
 806 DIR *dir;
 807 int errint;
 808 int dir_fd;
 809 struct dirent *dirent;
 810
 811         dir=opendir("/proc/self/fd/");
 812         g_return_if_fail(dir!=NULL);
 813         dir_fd=dirfd(dir);
 814         g_return_if_fail(dir_fd!=-1);
 815
 816         while (errno=0,(dirent=readdir(dir))) {
 817 long dirent_fd;
 818 char *endptr;
 819
 820                 if (0
 821                                 || !strcmp(dirent->d_name,".")
 822                                 || !strcmp(dirent->d_name,".."))
 823                         continue;
 824                 dirent_fd=strtol(dirent->d_name,&endptr,10 /* base */);
 825                 g_assert(dirent_fd>=0 && (!endptr || !*endptr));
 826                 if (dirent_fd<fd_first_to_delete || dirent_fd==dir_fd)
 827                         continue;
 828
 829                 errint=close(dirent_fd);
 830                 g_assert(errint==0);
 831                 errno=0;
 832                 errint=close(dirent_fd);
 833                 g_assert(errint==-1); g_assert(errno==EBADF);
 834                 }
 835         g_return_if_fail(errno==0);     /* check for EOF */
 836
 837         errint=closedir(dir);
 838         g_return_if_fail(errint==0);
 839         errno=0;
 840         close(dir_fd); g_assert(errno==EBADF);  /* just a bit of paranoia; it should be already closed by closedir() */
 841 }
 842
 843 gboolean captive_sandbox_spawn(CaptiveVfsParentObject *captive_vfs_parent_object)
 844 {
 845 /* Vfs_IOR_fds[0] for reading by sandbox_parent() - client,
 846  * Vfs_IOR_fds[1] for writing by sandbox_child()  - server
 847  */
 848 int Vfs_IOR_fds[2],parentheart_fds[2];
 849 int errint;
 850 gboolean errbool;
 851
 852         g_return_val_if_fail(CAPTIVE_VFS_PARENT_IS_OBJECT(captive_vfs_parent_object),FALSE);
 853
 854         errint=pipe(Vfs_IOR_fds);
 855         g_return_val_if_fail(errint==0,FALSE);
 856         errint=pipe(parentheart_fds);
 857         g_return_val_if_fail(errint==0,FALSE);
 858
 859         /* Currently never called anywhere:
 860          *     errbool=corba_shutdown(&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
 861          *     g_assert(errbool==TRUE);
 862          */
 863
 864         if (CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_ior) {
 865                 g_assert(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv==NULL);
 866
 867                 errbool=corba_init("captive-sandbox-parent",&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
 868                 g_assert(errbool==TRUE);
 869
 870                 captive_vfs_parent_object->corba_parentheart_fds_1=-1;
 871                 captive_vfs_parent_object->corba_child_pid=-1;
 872                 sandbox_parent(
 873                                 CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_ior,      /* Vfs_IOR */
 874                                 NULL,   /* child_chroot_pid_hashkey_dir */
 875                                 captive_vfs_parent_object);     /* captive_vfs_parent_object */
 876                 return TRUE;
 877                 }
 878
 879         g_assert(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv!=NULL);
 880         switch ((captive_vfs_parent_object->corba_child_pid=fork())) {
 881                 case -1:        /* error */
 882                         g_return_val_if_reached(FALSE);
 883
 884                 case 0: { /* child */
 885
 886                         errint=close(Vfs_IOR_fds[0]);   /* close Vfs_IOR_fd_read */
 887                         g_return_val_if_fail(errint==0,FALSE);
 888                         errint=close(parentheart_fds[1]);       /* close parentheart_fd_write */
 889                         g_return_val_if_fail(errint==0,FALSE);
 890
 891                         fd_shiftup(Vfs_IOR_fds+1);      /* Vfs_IOR_fd_write */
 892                         fd_shiftup(parentheart_fds+0);  /* parentheart_fd_read */
 893                         errint=dup2(Vfs_IOR_fds[1],1 /* STDOUT */);     /* Vfs_IOR_fd_write */
 894                         g_return_val_if_fail(errint==1 /* STDOUT */,FALSE);
 895                         errint=dup2(parentheart_fds[0],0 /* STDIN */);  /* parentheart_fd_read */
 896                         g_return_val_if_fail(errint==0 /* STDIN */,FALSE);
 897
 898                         captive_sandbox_fd_closeup(2 /* STDERR */ +1);
 899
 900                         execv(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv[0],
 901                                         /* re-const */ (char * const *)CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv);
 902                         g_return_val_if_reached(FALSE);
 903                         } /* NOTREACHED */
 904
 905                 default: {      /* parent */
 906 gchar *Vfs_IOR;
 907 gchar *child_chroot_pid_hashkey_dir;
 908
 909                         errint=close(Vfs_IOR_fds[1]);   /* close Vfs_IOR_fd_write */
 910                         g_return_val_if_fail(errint==0,FALSE);
 911                         errint=close(parentheart_fds[0]);       /* close parentheart_fd_read */
 912                         g_return_val_if_fail(errint==0,FALSE);
 913                         errint=fcntl(parentheart_fds[1],F_SETFD,FD_CLOEXEC);
 914                         /* This fcntl(2) may not be enough - some fork(2) may duplicate this
 915                          * write descriptor and even if we do some process finish the child
 916                          * may remain alone connected with some unknown fork(2)er from us.
 917                          * Currently I am not aware such case would occur.
 918                          */
 919                         g_return_val_if_fail(errint==0,FALSE);
 920                         captive_vfs_parent_object->corba_parentheart_fds_1=parentheart_fds[1];
 921
 922                         Vfs_IOR=sandbox_parent_read_ior(
 923                                         Vfs_IOR_fds[0], /* Vfs_IOR_fd_read */
 924                                         &child_chroot_pid_hashkey_dir,
 925                                         captive_vfs_parent_object);
 926
 927                         sandbox_parent(
 928                                         Vfs_IOR,        /* Vfs_IOR */
 929                                         child_chroot_pid_hashkey_dir,   /* child_chroot_pid_hashkey_dir */
 930                                         captive_vfs_parent_object);     /* captive_vfs_parent_object */
 931
 932                         g_free(Vfs_IOR);
 933                         g_free(child_chroot_pid_hashkey_dir);
 934
 935                         /* 'parentheart_fds[1]' - parentheart_fd_write - is left open here */
 936                         return TRUE;
 937                         }
 938                 }
 939         /* NOTREACHED */
 940         g_return_val_if_reached(FALSE);
 941 }
 942
 943
 944 GnomeVFSResult captive_sandbox_parent_return_from_CORBA_Environment
 945                 (CORBA_Environment *evp,CaptiveVfsParentObject *captive_vfs_parent_object)
 946 {
 947 GnomeVFSResult r;
 948
 949         if (evp->_major==CORBA_NO_EXCEPTION)
 950                 return GNOME_VFS_OK;
 951
 952         /* If !CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv it is CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_ior
 953          * where we cannot do any restart anyway.
 954          */
 955         if (captive_vfs_parent_object && CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv
 956                         && (evp->_major==CORBA_SYSTEM_EXCEPTION && !strcmp(ex_CORBA_COMM_FAILURE,CORBA_exception_id(evp)))) {
 957                 r=GNOME_VFS_ERROR_SERVICE_NOT_AVAILABLE;
 958                 if (captive_vfs_parent_object->corba_Vfs_object!=CORBA_OBJECT_NIL)
 959                         captive_vfs_parent_object_aborted(captive_vfs_parent_object);   /* errors ignored */
 960                 }
 961         else if (evp->_major==CORBA_USER_EXCEPTION && !strcmp(ex_Captive_GnomeVFSResultException,CORBA_exception_id(evp))) {
 962                 r=((Captive_GnomeVFSResultException *)CORBA_exception_value(evp))->gnome_vfs_result;
 963                 g_assert(r!=GNOME_VFS_ERROR_SERVICE_NOT_AVAILABLE);     /* code reserved for sandbox restarts */
 964                 }
 965         else {
 966                 r=GNOME_VFS_ERROR_GENERIC;
 967                 g_warning(_("CORBA Exception occured: id=\"%s\", value=%p"),
 968                                 CORBA_exception_id(evp),CORBA_exception_value(evp));
 969                 }
 970         CORBA_exception_free(evp);
 971
 972         return r;
 973 }
 974
 975
 976 void captive_sandbox_child_GnomeVFSResultException_throw(CORBA_Environment *evp,GnomeVFSResult errvfsresult)
 977 {
 978 Captive_GnomeVFSResultException *gnome_vfs_result_exception;
 979
 980         g_return_if_fail(evp!=NULL);
 981
 982         gnome_vfs_result_exception=Captive_GnomeVFSResultException__alloc();
 983         gnome_vfs_result_exception->gnome_vfs_result=errvfsresult;
 984         CORBA_exception_set(evp,CORBA_USER_EXCEPTION,ex_Captive_GnomeVFSResultException,gnome_vfs_result_exception);
 985 }