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