components/nacl/loader/nonsfi/abi_conversion.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <sys/stat.h>
   6 #include <sys/types.h>
   7 #include <unistd.h>
   8 #include <cstring>
   9
  10 #include "base/logging.h"
  11 #include "native_client/src/trusted/service_runtime/include/sys/stat.h"
  12 #include "native_client/src/trusted/service_runtime/include/sys/time.h"
  13
  14 namespace nacl {
  15 namespace nonsfi {
  16
  17 void NaClAbiTimeSpecToTimeSpec(const struct nacl_abi_timespec& nacl_timespec,
  18                                struct timespec* host_timespec) {
  19   host_timespec->tv_sec = nacl_timespec.tv_sec;
  20   host_timespec->tv_nsec = nacl_timespec.tv_nsec;
  21 }
  22
  23 void TimeSpecToNaClAbiTimeSpec(const struct timespec& host_timespec,
  24                                struct nacl_abi_timespec* nacl_timespec) {
  25   nacl_timespec->tv_sec = host_timespec.tv_sec;
  26   nacl_timespec->tv_nsec = host_timespec.tv_nsec;
  27 }
  28
  29 void StatToNaClAbiStat(
  30     const struct stat& host_stat, struct nacl_abi_stat* nacl_stat) {
  31   // Some fields in host_stat, such as st_dev, group/other bits of mode and
  32   // (a,m,c)timensec, are ignored to sync with the NaCl's original
  33   // implementation. Please see also NaClAbiStatHostDescStatXlateCtor in
  34   // native_client/src/trusted/desc/posix/nacl_desc.c.
  35   std::memset(nacl_stat, 0, sizeof(*nacl_stat));
  36   nacl_stat->nacl_abi_st_dev = 0;
  37   nacl_stat->nacl_abi_st_ino = host_stat.st_ino;
  38   nacl_abi_mode_t mode;
  39   switch (host_stat.st_mode & S_IFMT) {
  40     case S_IFREG:
  41       mode = NACL_ABI_S_IFREG;
  42       break;
  43     case S_IFDIR:
  44       mode = NACL_ABI_S_IFDIR;
  45       break;
  46     case S_IFCHR:
  47       mode = NACL_ABI_S_IFCHR;
  48       break;
  49     default:
  50       LOG(WARNING) << "Unusual NaCl descriptor type: "
  51                    << (host_stat.st_mode & S_IFMT);
  52       mode = NACL_ABI_S_UNSUP;
  53   }
  54   if (host_stat.st_mode & S_IRUSR)
  55     mode |= NACL_ABI_S_IRUSR;
  56   if (host_stat.st_mode & S_IWUSR)
  57     mode |= NACL_ABI_S_IWUSR;
  58   if (host_stat.st_mode & S_IXUSR)
  59     mode |= NACL_ABI_S_IXUSR;
  60   nacl_stat->nacl_abi_st_mode = mode;
  61   nacl_stat->nacl_abi_st_nlink = host_stat.st_nlink;
  62   nacl_stat->nacl_abi_st_uid = -1;  // Not root
  63   nacl_stat->nacl_abi_st_gid = -1;  // Not wheel
  64   nacl_stat->nacl_abi_st_rdev = 0;
  65   nacl_stat->nacl_abi_st_size = host_stat.st_size;
  66   nacl_stat->nacl_abi_st_blksize = 0;
  67   nacl_stat->nacl_abi_st_blocks = 0;
  68   nacl_stat->nacl_abi_st_atime = host_stat.st_atime;
  69   nacl_stat->nacl_abi_st_mtime = host_stat.st_mtime;
  70   nacl_stat->nacl_abi_st_ctime = host_stat.st_ctime;
  71 }
  72
  73 }  // namespace nonsfi
  74 }  // namespace nacl