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monero/src/common/util.cpp

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// Copyright (c) 2014-2018, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#include <cstdio>
#ifdef __GLIBC__
#include <gnu/libc-version.h>
#endif
#ifdef __GLIBC__
#include <sys/types.h>
#include <sys/stat.h>
#include <ustat.h>
#include <unistd.h>
#include <dirent.h>
#include <string.h>
#include <ctype.h>
#include <string>
#endif
#include "unbound.h"
#include "include_base_utils.h"
#include "file_io_utils.h"
#include "wipeable_string.h"
using namespace epee;
#include "crypto/crypto.h"
#include "util.h"
#include "stack_trace.h"
#include "memwipe.h"
#include "cryptonote_config.h"
#include "net/http_client.h" // epee::net_utils::...
#ifdef WIN32
#include <windows.h>
#include <shlobj.h>
#include <strsafe.h>
#else
#include <sys/file.h>
#include <sys/utsname.h>
#include <sys/stat.h>
#endif
#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/asio.hpp>
#include <openssl/sha.h>
namespace tools
{
std::function<void(int)> signal_handler::m_handler;
private_file::private_file() noexcept : m_handle(), m_filename() {}
private_file::private_file(std::FILE* handle, std::string&& filename) noexcept
: m_handle(handle), m_filename(std::move(filename)) {}
private_file private_file::create(std::string name)
{
#ifdef WIN32
struct close_handle
{
void operator()(HANDLE handle) const noexcept
{
CloseHandle(handle);
}
};
std::unique_ptr<void, close_handle> process = nullptr;
{
HANDLE temp{};
const bool fail = OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, std::addressof(temp)) == 0;
process.reset(temp);
if (fail)
return {};
}
DWORD sid_size = 0;
GetTokenInformation(process.get(), TokenOwner, nullptr, 0, std::addressof(sid_size));
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
return {};
std::unique_ptr<char[]> sid{new char[sid_size]};
if (!GetTokenInformation(process.get(), TokenOwner, sid.get(), sid_size, std::addressof(sid_size)))
return {};
const PSID psid = reinterpret_cast<const PTOKEN_OWNER>(sid.get())->Owner;
const DWORD daclSize =
sizeof(ACL) + sizeof(ACCESS_ALLOWED_ACE) + GetLengthSid(psid) - sizeof(DWORD);
const std::unique_ptr<char[]> dacl{new char[daclSize]};
if (!InitializeAcl(reinterpret_cast<PACL>(dacl.get()), daclSize, ACL_REVISION))
return {};
if (!AddAccessAllowedAce(reinterpret_cast<PACL>(dacl.get()), ACL_REVISION, (READ_CONTROL | FILE_GENERIC_READ | DELETE), psid))
return {};
SECURITY_DESCRIPTOR descriptor{};
if (!InitializeSecurityDescriptor(std::addressof(descriptor), SECURITY_DESCRIPTOR_REVISION))
return {};
if (!SetSecurityDescriptorDacl(std::addressof(descriptor), true, reinterpret_cast<PACL>(dacl.get()), false))
return {};
SECURITY_ATTRIBUTES attributes{sizeof(SECURITY_ATTRIBUTES), std::addressof(descriptor), false};
std::unique_ptr<void, close_handle> file{
CreateFile(
name.c_str(),
GENERIC_WRITE, FILE_SHARE_READ,
std::addressof(attributes),
CREATE_NEW, (FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE),
nullptr
)
};
if (file)
{
const int fd = _open_osfhandle(reinterpret_cast<intptr_t>(file.get()), 0);
if (0 <= fd)
{
file.release();
std::FILE* real_file = _fdopen(fd, "w");
if (!real_file)
{
_close(fd);
}
return {real_file, std::move(name)};
}
}
#else
const int fdr = open(name.c_str(), (O_RDONLY | O_CREAT), S_IRUSR);
if (0 <= fdr)
{
struct stat rstats = {};
if (fstat(fdr, std::addressof(rstats)) != 0)
{
close(fdr);
return {};
}
fchmod(fdr, (S_IRUSR | S_IWUSR));
const int fdw = open(name.c_str(), O_RDWR);
fchmod(fdr, rstats.st_mode);
close(fdr);
if (0 <= fdw)
{
struct stat wstats = {};
if (fstat(fdw, std::addressof(wstats)) == 0 &&
rstats.st_dev == wstats.st_dev && rstats.st_ino == wstats.st_ino &&
flock(fdw, (LOCK_EX | LOCK_NB)) == 0 && ftruncate(fdw, 0) == 0)
{
std::FILE* file = fdopen(fdw, "w");
if (file) return {file, std::move(name)};
}
close(fdw);
}
}
#endif
return {};
}
private_file::~private_file() noexcept
{
try
{
boost::system::error_code ec{};
boost::filesystem::remove(filename(), ec);
}
catch (...) {}
}
#ifdef WIN32
std::string get_windows_version_display_string()
{
typedef void (WINAPI *PGNSI)(LPSYSTEM_INFO);
typedef BOOL (WINAPI *PGPI)(DWORD, DWORD, DWORD, DWORD, PDWORD);
#define BUFSIZE 10000
char pszOS[BUFSIZE] = {0};
OSVERSIONINFOEX osvi;
SYSTEM_INFO si;
PGNSI pGNSI;
PGPI pGPI;
BOOL bOsVersionInfoEx;
DWORD dwType;
ZeroMemory(&si, sizeof(SYSTEM_INFO));
ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
bOsVersionInfoEx = GetVersionEx((OSVERSIONINFO*) &osvi);
if(!bOsVersionInfoEx) return pszOS;
// Call GetNativeSystemInfo if supported or GetSystemInfo otherwise.
pGNSI = (PGNSI) GetProcAddress(
GetModuleHandle(TEXT("kernel32.dll")),
"GetNativeSystemInfo");
if(NULL != pGNSI)
pGNSI(&si);
else GetSystemInfo(&si);
if ( VER_PLATFORM_WIN32_NT==osvi.dwPlatformId &&
osvi.dwMajorVersion > 4 )
{
StringCchCopy(pszOS, BUFSIZE, TEXT("Microsoft "));
// Test for the specific product.
if ( osvi.dwMajorVersion == 6 )
{
if( osvi.dwMinorVersion == 0 )
{
if( osvi.wProductType == VER_NT_WORKSTATION )
StringCchCat(pszOS, BUFSIZE, TEXT("Windows Vista "));
else StringCchCat(pszOS, BUFSIZE, TEXT("Windows Server 2008 " ));
}
if ( osvi.dwMinorVersion == 1 )
{
if( osvi.wProductType == VER_NT_WORKSTATION )
StringCchCat(pszOS, BUFSIZE, TEXT("Windows 7 "));
else StringCchCat(pszOS, BUFSIZE, TEXT("Windows Server 2008 R2 " ));
}
pGPI = (PGPI) GetProcAddress(
GetModuleHandle(TEXT("kernel32.dll")),
"GetProductInfo");
pGPI( osvi.dwMajorVersion, osvi.dwMinorVersion, 0, 0, &dwType);
switch( dwType )
{
case PRODUCT_ULTIMATE:
StringCchCat(pszOS, BUFSIZE, TEXT("Ultimate Edition" ));
break;
case PRODUCT_PROFESSIONAL:
StringCchCat(pszOS, BUFSIZE, TEXT("Professional" ));
break;
case PRODUCT_HOME_PREMIUM:
StringCchCat(pszOS, BUFSIZE, TEXT("Home Premium Edition" ));
break;
case PRODUCT_HOME_BASIC:
StringCchCat(pszOS, BUFSIZE, TEXT("Home Basic Edition" ));
break;
case PRODUCT_ENTERPRISE:
StringCchCat(pszOS, BUFSIZE, TEXT("Enterprise Edition" ));
break;
case PRODUCT_BUSINESS:
StringCchCat(pszOS, BUFSIZE, TEXT("Business Edition" ));
break;
case PRODUCT_STARTER:
StringCchCat(pszOS, BUFSIZE, TEXT("Starter Edition" ));
break;
case PRODUCT_CLUSTER_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Cluster Server Edition" ));
break;
case PRODUCT_DATACENTER_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Datacenter Edition" ));
break;
case PRODUCT_DATACENTER_SERVER_CORE:
StringCchCat(pszOS, BUFSIZE, TEXT("Datacenter Edition (core installation)" ));
break;
case PRODUCT_ENTERPRISE_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Enterprise Edition" ));
break;
case PRODUCT_ENTERPRISE_SERVER_CORE:
StringCchCat(pszOS, BUFSIZE, TEXT("Enterprise Edition (core installation)" ));
break;
case PRODUCT_ENTERPRISE_SERVER_IA64:
StringCchCat(pszOS, BUFSIZE, TEXT("Enterprise Edition for Itanium-based Systems" ));
break;
case PRODUCT_SMALLBUSINESS_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Small Business Server" ));
break;
case PRODUCT_SMALLBUSINESS_SERVER_PREMIUM:
StringCchCat(pszOS, BUFSIZE, TEXT("Small Business Server Premium Edition" ));
break;
case PRODUCT_STANDARD_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Standard Edition" ));
break;
case PRODUCT_STANDARD_SERVER_CORE:
StringCchCat(pszOS, BUFSIZE, TEXT("Standard Edition (core installation)" ));
break;
case PRODUCT_WEB_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Web Server Edition" ));
break;
}
}
if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 2 )
{
if( GetSystemMetrics(SM_SERVERR2) )
StringCchCat(pszOS, BUFSIZE, TEXT( "Windows Server 2003 R2, "));
else if ( osvi.wSuiteMask & VER_SUITE_STORAGE_SERVER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Windows Storage Server 2003"));
else if ( osvi.wSuiteMask & VER_SUITE_WH_SERVER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Windows Home Server"));
else if( osvi.wProductType == VER_NT_WORKSTATION &&
si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64)
{
StringCchCat(pszOS, BUFSIZE, TEXT( "Windows XP Professional x64 Edition"));
}
else StringCchCat(pszOS, BUFSIZE, TEXT("Windows Server 2003, "));
// Test for the server type.
if ( osvi.wProductType != VER_NT_WORKSTATION )
{
if ( si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_IA64 )
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Datacenter Edition for Itanium-based Systems" ));
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Enterprise Edition for Itanium-based Systems" ));
}
else if ( si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64 )
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Datacenter x64 Edition" ));
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Enterprise x64 Edition" ));
else StringCchCat(pszOS, BUFSIZE, TEXT( "Standard x64 Edition" ));
}
else
{
if ( osvi.wSuiteMask & VER_SUITE_COMPUTE_SERVER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Compute Cluster Edition" ));
else if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Datacenter Edition" ));
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Enterprise Edition" ));
else if ( osvi.wSuiteMask & VER_SUITE_BLADE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Web Edition" ));
else StringCchCat(pszOS, BUFSIZE, TEXT( "Standard Edition" ));
}
}
}
if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1 )
{
StringCchCat(pszOS, BUFSIZE, TEXT("Windows XP "));
if( osvi.wSuiteMask & VER_SUITE_PERSONAL )
StringCchCat(pszOS, BUFSIZE, TEXT( "Home Edition" ));
else StringCchCat(pszOS, BUFSIZE, TEXT( "Professional" ));
}
if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0 )
{
StringCchCat(pszOS, BUFSIZE, TEXT("Windows 2000 "));
if ( osvi.wProductType == VER_NT_WORKSTATION )
{
StringCchCat(pszOS, BUFSIZE, TEXT( "Professional" ));
}
else
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Datacenter Server" ));
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Advanced Server" ));
else StringCchCat(pszOS, BUFSIZE, TEXT( "Server" ));
}
}
// Include service pack (if any) and build number.
if( strlen(osvi.szCSDVersion) > 0 )
{
StringCchCat(pszOS, BUFSIZE, TEXT(" ") );
StringCchCat(pszOS, BUFSIZE, osvi.szCSDVersion);
}
TCHAR buf[80];
StringCchPrintf( buf, 80, TEXT(" (build %d)"), osvi.dwBuildNumber);
StringCchCat(pszOS, BUFSIZE, buf);
if ( osvi.dwMajorVersion >= 6 )
{
if ( si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64 )
StringCchCat(pszOS, BUFSIZE, TEXT( ", 64-bit" ));
else if (si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_INTEL )
StringCchCat(pszOS, BUFSIZE, TEXT(", 32-bit"));
}
return pszOS;
}
else
{
printf( "This sample does not support this version of Windows.\n");
return pszOS;
}
}
#else
std::string get_nix_version_display_string()
{
struct utsname un;
if(uname(&un) < 0)
return std::string("*nix: failed to get os version");
return std::string() + un.sysname + " " + un.version + " " + un.release;
}
#endif
std::string get_os_version_string()
{
#ifdef WIN32
return get_windows_version_display_string();
#else
return get_nix_version_display_string();
#endif
}
#ifdef WIN32
std::string get_special_folder_path(int nfolder, bool iscreate)
{
WCHAR psz_path[MAX_PATH] = L"";
if (SHGetSpecialFolderPathW(NULL, psz_path, nfolder, iscreate))
{
int size_needed = WideCharToMultiByte(CP_UTF8, 0, psz_path, wcslen(psz_path), NULL, 0, NULL, NULL);
std::string folder_name(size_needed, 0);
WideCharToMultiByte(CP_UTF8, 0, psz_path, wcslen(psz_path), &folder_name[0], size_needed, NULL, NULL);
return folder_name;
}
LOG_ERROR("SHGetSpecialFolderPathW() failed, could not obtain requested path.");
return "";
}
#endif
std::string get_default_data_dir()
{
/* Please for the love of god refactor the ifdefs out of this */
// namespace fs = boost::filesystem;
// Windows < Vista: C:\Documents and Settings\Username\Application Data\CRYPTONOTE_NAME
// Windows >= Vista: C:\Users\Username\AppData\Roaming\CRYPTONOTE_NAME
// Unix & Mac: ~/.CRYPTONOTE_NAME
std::string config_folder;
#ifdef WIN32
config_folder = get_special_folder_path(CSIDL_COMMON_APPDATA, true) + "\\" + CRYPTONOTE_NAME;
#else
std::string pathRet;
char* pszHome = getenv("HOME");
if (pszHome == NULL || strlen(pszHome) == 0)
pathRet = "/";
else
pathRet = pszHome;
config_folder = (pathRet + "/." + CRYPTONOTE_NAME);
#endif
return config_folder;
}
bool create_directories_if_necessary(const std::string& path)
{
namespace fs = boost::filesystem;
boost::system::error_code ec;
fs::path fs_path(path);
if (fs::is_directory(fs_path, ec))
{
return true;
}
bool res = fs::create_directories(fs_path, ec);
if (res)
{
LOG_PRINT_L2("Created directory: " << path);
}
else
{
LOG_PRINT_L2("Can't create directory: " << path << ", err: "<< ec.message());
}
return res;
}
std::error_code replace_file(const std::string& replacement_name, const std::string& replaced_name)
{
int code;
#if defined(WIN32)
// Maximizing chances for success
WCHAR wide_replacement_name[1000];
MultiByteToWideChar(CP_UTF8, 0, replacement_name.c_str(), replacement_name.size() + 1, wide_replacement_name, 1000);
WCHAR wide_replaced_name[1000];
MultiByteToWideChar(CP_UTF8, 0, replaced_name.c_str(), replaced_name.size() + 1, wide_replaced_name, 1000);
DWORD attributes = ::GetFileAttributesW(wide_replaced_name);
if (INVALID_FILE_ATTRIBUTES != attributes)
{
::SetFileAttributesW(wide_replaced_name, attributes & (~FILE_ATTRIBUTE_READONLY));
}
bool ok = 0 != ::MoveFileExW(wide_replacement_name, wide_replaced_name, MOVEFILE_REPLACE_EXISTING);
code = ok ? 0 : static_cast<int>(::GetLastError());
#else
bool ok = 0 == std::rename(replacement_name.c_str(), replaced_name.c_str());
code = ok ? 0 : errno;
#endif
return std::error_code(code, std::system_category());
}
static bool unbound_built_with_threads()
{
ub_ctx *ctx = ub_ctx_create();
if (!ctx) return false; // cheat a bit, should not happen unless OOM
char *monero = strdup("monero"), *unbound = strdup("unbound");
ub_ctx_zone_add(ctx, monero, unbound); // this calls ub_ctx_finalize first, then errors out with UB_SYNTAX
free(unbound);
free(monero);
// if no threads, bails out early with UB_NOERROR, otherwise fails with UB_AFTERFINAL id already finalized
bool with_threads = ub_ctx_async(ctx, 1) != 0; // UB_AFTERFINAL is not defined in public headers, check any error
ub_ctx_delete(ctx);
MINFO("libunbound was built " << (with_threads ? "with" : "without") << " threads");
return with_threads;
}
bool sanitize_locale()
{
// boost::filesystem throws for "invalid" locales, such as en_US.UTF-8, or kjsdkfs,
// so reset it here before any calls to it
try
{
boost::filesystem::path p {std::string("test")};
p /= std::string("test");
}
catch (...)
{
#if defined(__MINGW32__) || defined(__MINGW__)
putenv("LC_ALL=C");
putenv("LANG=C");
#else
setenv("LC_ALL", "C", 1);
setenv("LANG", "C", 1);
#endif
return true;
}
return false;
}
#ifdef STACK_TRACE
#ifdef _WIN32
// https://stackoverflow.com/questions/1992816/how-to-handle-seg-faults-under-windows
static LONG WINAPI windows_crash_handler(PEXCEPTION_POINTERS pExceptionInfo)
{
tools::log_stack_trace("crashing");
exit(1);
return EXCEPTION_CONTINUE_SEARCH;
}
static void setup_crash_dump()
{
SetUnhandledExceptionFilter(windows_crash_handler);
}
#else
static void posix_crash_handler(int signal)
{
tools::log_stack_trace(("crashing with fatal signal " + std::to_string(signal)).c_str());
#ifdef NDEBUG
_exit(1);
#else
abort();
#endif
}
static void setup_crash_dump()
{
signal(SIGSEGV, posix_crash_handler);
signal(SIGBUS, posix_crash_handler);
signal(SIGILL, posix_crash_handler);
signal(SIGFPE, posix_crash_handler);
}
#endif
#else
static void setup_crash_dump() {}
#endif
bool on_startup()
{
mlog_configure("", true);
setup_crash_dump();
sanitize_locale();
#ifdef __GLIBC__
const char *ver = gnu_get_libc_version();
if (!strcmp(ver, "2.25"))
MCLOG_RED(el::Level::Warning, "global", "Running with glibc " << ver << ", hangs may occur - change glibc version if possible");
#endif
#if OPENSSL_VERSION_NUMBER < 0x10100000 || defined(LIBRESSL_VERSION_TEXT)
SSL_library_init();
#else
OPENSSL_init_ssl(0, NULL);
#endif
if (!unbound_built_with_threads())
MCLOG_RED(el::Level::Warning, "global", "libunbound was not built with threads enabled - crashes may occur");
return true;
}
void set_strict_default_file_permissions(bool strict)
{
#if defined(__MINGW32__) || defined(__MINGW__)
// no clue about the odd one out
#else
mode_t mode = strict ? 077 : 0;
umask(mode);
#endif
}
bool is_hdd(const char *path)
{
#ifdef __GLIBC__
std::string device = "";
struct stat st, dst;
if (stat(path, &st) < 0)
return 0;
DIR *dir = opendir("/dev/block");
if (!dir)
return 0;
struct dirent *de;
while ((de = readdir(dir)))
{
if (strcmp(de->d_name, ".") && strcmp(de->d_name, ".."))
{
std::string dev_path = std::string("/dev/block/") + de->d_name;
char resolved[PATH_MAX];
if (realpath(dev_path.c_str(), resolved) && !strncmp(resolved, "/dev/", 5))
{
if (stat(resolved, &dst) == 0)
{
if (dst.st_rdev == st.st_dev)
{
// take out trailing digits (eg, sda1 -> sda)
char *ptr = resolved;
while (*ptr)
++ptr;
while (ptr > resolved && isdigit(*--ptr))
*ptr = 0;
device = resolved + 5;
break;
}
}
}
}
}
closedir(dir);
if (device.empty())
return 0;
std::string sys_path = "/sys/block/" + device + "/queue/rotational";
FILE *f = fopen(sys_path.c_str(), "r");
if (!f)
return false;
char s[8];
char *ptr = fgets(s, sizeof(s), f);
fclose(f);
if (!ptr)
return 0;
s[sizeof(s) - 1] = 0;
int n = atoi(s); // returns 0 on parse error
return n == 1;
#else
return 0;
#endif
}
namespace
{
boost::mutex max_concurrency_lock;
unsigned max_concurrency = boost::thread::hardware_concurrency();
}
void set_max_concurrency(unsigned n)
{
if (n < 1)
n = boost::thread::hardware_concurrency();
unsigned hwc = boost::thread::hardware_concurrency();
if (n > hwc)
n = hwc;
boost::lock_guard<boost::mutex> lock(max_concurrency_lock);
max_concurrency = n;
}
unsigned get_max_concurrency()
{
boost::lock_guard<boost::mutex> lock(max_concurrency_lock);
return max_concurrency;
}
bool is_local_address(const std::string &address)
{
// extract host
epee::net_utils::http::url_content u_c;
if (!epee::net_utils::parse_url(address, u_c))
{
MWARNING("Failed to determine whether address '" << address << "' is local, assuming not");
return false;
}
if (u_c.host.empty())
{
MWARNING("Failed to determine whether address '" << address << "' is local, assuming not");
return false;
}
// resolve to IP
boost::asio::io_service io_service;
boost::asio::ip::tcp::resolver resolver(io_service);
boost::asio::ip::tcp::resolver::query query(u_c.host, "");
boost::asio::ip::tcp::resolver::iterator i = resolver.resolve(query);
while (i != boost::asio::ip::tcp::resolver::iterator())
{
const boost::asio::ip::tcp::endpoint &ep = *i;
if (ep.address().is_loopback())
{
MDEBUG("Address '" << address << "' is local");
return true;
}
++i;
}
MDEBUG("Address '" << address << "' is not local");
return false;
}
int vercmp(const char *v0, const char *v1)
{
std::vector<std::string> f0, f1;
boost::split(f0, v0, boost::is_any_of(".-"));
boost::split(f1, v1, boost::is_any_of(".-"));
for (size_t i = 0; i < std::max(f0.size(), f1.size()); ++i) {
if (i >= f0.size())
return -1;
if (i >= f1.size())
return 1;
int f0i = atoi(f0[i].c_str()), f1i = atoi(f1[i].c_str());
int n = f0i - f1i;
if (n)
return n;
}
return 0;
}
bool sha256sum(const uint8_t *data, size_t len, crypto::hash &hash)
{
SHA256_CTX ctx;
if (!SHA256_Init(&ctx))
return false;
if (!SHA256_Update(&ctx, data, len))
return false;
if (!SHA256_Final((unsigned char*)hash.data, &ctx))
return false;
return true;
}
bool sha256sum(const std::string &filename, crypto::hash &hash)
{
if (!epee::file_io_utils::is_file_exist(filename))
return false;
std::ifstream f;
f.exceptions(std::ifstream::failbit | std::ifstream::badbit);
f.open(filename, std::ios_base::binary | std::ios_base::in | std::ios::ate);
if (!f)
return false;
std::ifstream::pos_type file_size = f.tellg();
SHA256_CTX ctx;
if (!SHA256_Init(&ctx))
return false;
size_t size_left = file_size;
f.seekg(0, std::ios::beg);
while (size_left)
{
char buf[4096];
std::ifstream::pos_type read_size = size_left > sizeof(buf) ? sizeof(buf) : size_left;
f.read(buf, read_size);
if (!f || !f.good())
return false;
if (!SHA256_Update(&ctx, buf, read_size))
return false;
size_left -= read_size;
}
f.close();
if (!SHA256_Final((unsigned char*)hash.data, &ctx))
return false;
return true;
}
}
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