service_runtime/nacl_desc_dir.c

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NaCl Service Runtime.  Directory descriptor abstraction.
  34  */
  35
  36 #include "native_client/include/portability.h"
  37
  38 #include <stdlib.h>
  39
  40 #if NACL_WINDOWS
  41 # include "io.h"
  42 #endif
  43
  44 #include "native_client/service_runtime/nacl_config.h"
  45 #include "native_client/service_runtime/nacl_log.h"
  46 #include "native_client/service_runtime/nacl_desc_base.h"
  47 #include "native_client/service_runtime/nacl_desc_dir.h"
  48 #include "native_client/service_runtime/internal_errno.h"
  49
  50 #include "native_client/service_runtime/include/sys/dirent.h"
  51 #include "native_client/service_runtime/include/sys/errno.h"
  52 #include "native_client/service_runtime/include/sys/fcntl.h"
  53 #include "native_client/service_runtime/include/sys/mman.h"
  54
  55 #include "native_client/intermodule_comm/nacl_imc_c.h"
  56
  57 /*
  58  * This file contains the implementation for the NaClDirDesc subclass
  59  * of NaClDesc.
  60  *
  61  * NaClDescDirDesc is the subclass that wraps host-OS directory information.
  62  */
  63
  64 /*
  65  * Takes ownership of hd, will close in Dtor.
  66  */
  67 int NaClDescDirDescCtor(struct NaClDescDirDesc  *self,
  68                         struct NaClHostDir      *hd)
  69 {
  70   struct NaClDesc *basep = (struct NaClDesc *) self;
  71
  72   if (!NaClDescCtor(basep)) {
  73     return 0;
  74   }
  75   self->hd = hd;
  76   basep->vtbl = &kNaClDescDirDescVtbl;
  77   return 1;
  78 }
  79
  80 void NaClDescDirDescDtor(struct NaClDesc *vself)
  81 {
  82   struct NaClDescDirDesc *self = (struct NaClDescDirDesc *) vself;
  83
  84   NaClLog(4, "NaClDescDirDescDtor(0x%08x).\n",
  85           (uintptr_t) vself);
  86   NaClHostDirClose(self->hd);
  87   free(self->hd);
  88   self->hd = NULL;
  89   NaClDescDtor(&self->base);
  90 }
  91
  92 struct NaClDescDirDesc *NaClDescDirDescMake(struct NaClHostDir *nhdp)
  93 {
  94   struct NaClDescDirDesc *ndp;
  95
  96   ndp = malloc(sizeof *ndp);
  97   if (NULL == ndp) {
  98     NaClLog(LOG_FATAL,
  99             "NaClDescDirDescMake: no memory for 0x%08x\n",
 100             (uintptr_t) nhdp);
 101   }
 102   if (!NaClDescDirDescCtor(ndp, nhdp)) {
 103     NaClLog(LOG_FATAL,
 104             "NaClDescDirDescMake: NaClDescDirDescCtor(0x%08x,0x%08x) failed\n",
 105             (uintptr_t) ndp,
 106             (uintptr_t) nhdp);
 107   }
 108   return ndp;
 109 }
 110
 111 struct NaClDescDirDesc *NaClDescDirDescOpen(char  *path)
 112 {
 113   struct NaClHostDir  *nhdp;
 114
 115   nhdp = malloc(sizeof *nhdp);
 116   if (NULL == nhdp) {
 117     NaClLog(LOG_FATAL, "NaClDescDirDescOpen: no memory for %s\n", path);
 118   }
 119   if (!NaClHostDirOpen(nhdp, path)) {
 120     NaClLog(LOG_FATAL, "NaClDescDirDescOpen: NaClHostDirOpen failed for %s\n",
 121             path);
 122   }
 123   return NaClDescDirDescMake(nhdp);
 124 }
 125
 126 ssize_t NaClDescDirDescRead(struct NaClDesc         *vself,
 127                             struct NaClDescEffector *effp,
 128                             void                    *buf,
 129                             size_t                  len)
 130 {
 131   /* NaClLog(LOG_ERROR, "NaClDescDirDescRead: Read not allowed on dir\n"); */
 132   return NaClDescDirDescGetdents(vself, effp, buf, len);
 133   /* return -NACL_ABI_EINVAL; */
 134 }
 135
 136 ssize_t NaClDescDirDescGetdents(struct NaClDesc         *vself,
 137                                 struct NaClDescEffector *effp,
 138                                 void                    *dirp,
 139                                 size_t                  count)
 140 {
 141   struct NaClDescDirDesc *self = (struct NaClDescDirDesc *) vself;
 142   struct nacl_abi_dirent *direntp = (struct nacl_abi_dirent *) dirp;
 143   ssize_t retval;
 144
 145   NaClLog(3, "NaClDescDirDescGetdents(0x%08x, %u):\n", dirp, count);
 146   retval = NaClHostDirGetdents(self->hd, dirp, count);
 147   NaClLog(3, "NaClDescDirDescGetdents(d_ino=%u, d_off=%u, d_reclen=%u, "
 148           "d_name='%s')\n",
 149           direntp->nacl_abi_d_ino,
 150           direntp->nacl_abi_d_off,
 151           direntp->nacl_abi_d_reclen,
 152           direntp->nacl_abi_d_name);
 153   return retval;
 154 }
 155
 156 int NaClDescDirDescClose(struct NaClDesc          *vself,
 157                          struct NaClDescEffector  *effp)
 158 {
 159   NaClDescUnref(vself);
 160   return 0;
 161 }
 162
 163 int NaClDescDirDescExternalizeSize(struct NaClDesc *vself,
 164                                    size_t          *nbytes,
 165                                    size_t          *nhandles)
 166 {
 167   *nbytes = 0;
 168   *nhandles = 1;
 169   return 0;
 170 }
 171
 172 struct NaClDescVtbl const kNaClDescDirDescVtbl = {
 173   NaClDescDirDescDtor,
 174   NaClDescMapNotImplemented,
 175   NaClDescUnmapUnsafeNotImplemented,
 176   NaClDescUnmapNotImplemented,
 177   NaClDescDirDescRead,
 178   NaClDescWriteNotImplemented,
 179   NaClDescSeekNotImplemented,
 180   NaClDescIoctlNotImplemented,
 181   NaClDescFstatNotImplemented,
 182   NaClDescDirDescClose,
 183   NaClDescDirDescGetdents,
 184   NACL_DESC_DIR,
 185   NaClDescDirDescExternalizeSize,
 186   NaClDescExternalizeNotImplemented,
 187   NaClDescLockNotImplemented,
 188   NaClDescTryLockNotImplemented,
 189   NaClDescUnlockNotImplemented,
 190   NaClDescWaitNotImplemented,
 191   NaClDescTimedWaitAbsNotImplemented,
 192   NaClDescSignalNotImplemented,
 193   NaClDescBroadcastNotImplemented,
 194   NaClDescSendMsgNotImplemented,
 195   NaClDescRecvMsgNotImplemented,
 196   NaClDescConnectAddrNotImplemented,
 197   NaClDescAcceptConnNotImplemented,
 198   NaClDescPostNotImplemented,
 199   NaClDescSemWaitNotImplemented,
 200   NaClDescGetValueNotImplemented,
 201 };
 202
 203 int NaClDescDirInternalize(struct NaClDesc           **baseptr,
 204                            struct NaClDescXferState  *xfer)
 205 {
 206   NaClLog(LOG_ERROR, "NaClDescDirDescInternalize: not implemented for dir\n");
 207   return -NACL_ABI_EINVAL;
 208 }