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   basep->vtbl = (struct NaClDescVtbl *) NULL;
  73   if (!NaClDescCtor(basep)) {
  74     return 0;
  75   }
  76   self->hd = hd;
  77   basep->vtbl = &kNaClDescDirDescVtbl;
  78   return 1;
  79 }
  80
  81 void NaClDescDirDescDtor(struct NaClDesc *vself)
  82 {
  83   struct NaClDescDirDesc *self = (struct NaClDescDirDesc *) vself;
  84
  85   NaClLog(4, "NaClDescDirDescDtor(0x%08"PRIxPTR").\n",
  86           (uintptr_t) vself);
  87   NaClHostDirClose(self->hd);
  88   free(self->hd);
  89   self->hd = NULL;
  90   vself->vtbl = (struct NaClDescVtbl *) NULL;
  91   NaClDescDtor(&self->base);
  92 }
  93
  94 struct NaClDescDirDesc *NaClDescDirDescMake(struct NaClHostDir *nhdp)
  95 {
  96   struct NaClDescDirDesc *ndp;
  97
  98   ndp = malloc(sizeof *ndp);
  99   if (NULL == ndp) {
 100     NaClLog(LOG_FATAL,
 101             "NaClDescDirDescMake: no memory for 0x%08"PRIxPTR"\n",
 102             (uintptr_t) nhdp);
 103   }
 104   if (!NaClDescDirDescCtor(ndp, nhdp)) {
 105     NaClLog(LOG_FATAL,
 106             ("NaClDescDirDescMake:"
 107              " NaClDescDirDescCtor(0x%08"PRIxPTR",0x%08"PRIxPTR") failed\n"),
 108             (uintptr_t) ndp,
 109             (uintptr_t) nhdp);
 110   }
 111   return ndp;
 112 }
 113
 114 struct NaClDescDirDesc *NaClDescDirDescOpen(char  *path)
 115 {
 116   struct NaClHostDir  *nhdp;
 117
 118   nhdp = malloc(sizeof *nhdp);
 119   if (NULL == nhdp) {
 120     NaClLog(LOG_FATAL, "NaClDescDirDescOpen: no memory for %s\n", path);
 121   }
 122   if (!NaClHostDirOpen(nhdp, path)) {
 123     NaClLog(LOG_FATAL, "NaClDescDirDescOpen: NaClHostDirOpen failed for %s\n",
 124             path);
 125   }
 126   return NaClDescDirDescMake(nhdp);
 127 }
 128
 129 ssize_t NaClDescDirDescRead(struct NaClDesc         *vself,
 130                             struct NaClDescEffector *effp,
 131                             void                    *buf,
 132                             size_t                  len)
 133 {
 134   /* NaClLog(LOG_ERROR, "NaClDescDirDescRead: Read not allowed on dir\n"); */
 135   return NaClDescDirDescGetdents(vself, effp, buf, len);
 136   /* return -NACL_ABI_EINVAL; */
 137 }
 138
 139 ssize_t NaClDescDirDescGetdents(struct NaClDesc         *vself,
 140                                 struct NaClDescEffector *effp,
 141                                 void                    *dirp,
 142                                 size_t                  count)
 143 {
 144   struct NaClDescDirDesc *self = (struct NaClDescDirDesc *) vself;
 145   struct nacl_abi_dirent *direntp = (struct nacl_abi_dirent *) dirp;
 146   ssize_t retval;
 147
 148   NaClLog(3, "NaClDescDirDescGetdents(0x%08"PRIxPTR", %"PRIuS"):\n",
 149           (uintptr_t) dirp, count);
 150   retval = NaClHostDirGetdents(self->hd, dirp, count);
 151   NaClLog(3, "NaClDescDirDescGetdents(d_ino=%lu, d_off=%lu, d_reclen=%u, "
 152           "d_name='%s')\n",
 153           direntp->nacl_abi_d_ino,
 154           direntp->nacl_abi_d_off,
 155           direntp->nacl_abi_d_reclen,
 156           direntp->nacl_abi_d_name);
 157   return retval;
 158 }
 159
 160 int NaClDescDirDescClose(struct NaClDesc          *vself,
 161                          struct NaClDescEffector  *effp)
 162 {
 163   NaClDescUnref(vself);
 164   return 0;
 165 }
 166
 167 int NaClDescDirDescExternalizeSize(struct NaClDesc *vself,
 168                                    size_t          *nbytes,
 169                                    size_t          *nhandles)
 170 {
 171   *nbytes = 0;
 172   *nhandles = 1;
 173   return 0;
 174 }
 175
 176 struct NaClDescVtbl const kNaClDescDirDescVtbl = {
 177   NaClDescDirDescDtor,
 178   NaClDescMapNotImplemented,
 179   NaClDescUnmapUnsafeNotImplemented,
 180   NaClDescUnmapNotImplemented,
 181   NaClDescDirDescRead,
 182   NaClDescWriteNotImplemented,
 183   NaClDescSeekNotImplemented,
 184   NaClDescIoctlNotImplemented,
 185   NaClDescFstatNotImplemented,
 186   NaClDescDirDescClose,
 187   NaClDescDirDescGetdents,
 188   NACL_DESC_DIR,
 189   NaClDescDirDescExternalizeSize,
 190   NaClDescExternalizeNotImplemented,
 191   NaClDescLockNotImplemented,
 192   NaClDescTryLockNotImplemented,
 193   NaClDescUnlockNotImplemented,
 194   NaClDescWaitNotImplemented,
 195   NaClDescTimedWaitAbsNotImplemented,
 196   NaClDescSignalNotImplemented,
 197   NaClDescBroadcastNotImplemented,
 198   NaClDescSendMsgNotImplemented,
 199   NaClDescRecvMsgNotImplemented,
 200   NaClDescConnectAddrNotImplemented,
 201   NaClDescAcceptConnNotImplemented,
 202   NaClDescPostNotImplemented,
 203   NaClDescSemWaitNotImplemented,
 204   NaClDescGetValueNotImplemented,
 205 };
 206
 207 int NaClDescDirInternalize(struct NaClDesc           **baseptr,
 208                            struct NaClDescXferState  *xfer)
 209 {
 210   NaClLog(LOG_ERROR, "NaClDescDirDescInternalize: not implemented for dir\n");
 211   return -NACL_ABI_EINVAL;
 212 }