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icinga2/lib/base/utility.cpp

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/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-present Icinga Development Team (http://www.icinga.org) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "base/utility.h"
#include "base/convert.h"
#include "base/application.h"
#include "base/logger_fwd.h"
#include "base/exception.h"
#include <mmatch.h>
#include <boost/lexical_cast.hpp>
#include <boost/function.hpp>
#include <boost/foreach.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#ifdef __FreeBSD__
# include <pthread_np.h>
#endif /* __FreeBSD__ */
#ifndef _MSC_VER
# include <cxxabi.h>
#endif /* _MSC_VER */
using namespace icinga;
boost::thread_specific_ptr<String> Utility::m_ThreadName;
boost::thread_specific_ptr<unsigned int> Utility::m_RandSeed;
/**
* Demangles a symbol name.
*
* @param sym The symbol name.
* @returns A human-readable version of the symbol name.
*/
String Utility::DemangleSymbolName(const String& sym)
{
String result = sym;
#ifndef _MSC_VER
int status;
char *realname = abi::__cxa_demangle(sym.CStr(), 0, 0, &status);
if (realname != NULL) {
result = String(realname);
free(realname);
}
#else /* _MSC_VER */
CHAR output[256];
if (UnDecorateSymbolName(sym.CStr(), output, sizeof(output), UNDNAME_COMPLETE) > 0)
result = output;
#endif /* _MSC_VER */
return result;
}
/**
* Returns a human-readable type name of a type_info object.
*
* @param ti A type_info object.
* @returns The type name of the object.
*/
String Utility::GetTypeName(const std::type_info& ti)
{
return DemangleSymbolName(ti.name());
}
/**
* Performs wildcard pattern matching.
*
* @param pattern The wildcard pattern.
* @param text The String that should be checked.
* @returns true if the wildcard pattern matches, false otherwise.
*/
bool Utility::Match(const String& pattern, const String& text)
{
return (match(pattern.CStr(), text.CStr()) == 0);
}
/**
* Returns the directory component of a path. See dirname(3) for details.
*
* @param path The full path.
* @returns The directory.
*/
String Utility::DirName(const String& path)
{
char *dir;
#ifdef _WIN32
String dupPath = path;
/* PathRemoveFileSpec doesn't properly handle forward slashes. */
BOOST_FOREACH(char& ch, dupPath) {
if (ch == '/')
ch = '\\';
}
dir = strdup(dupPath.CStr());
#else /* _WIN32 */
dir = strdup(path.CStr());
#endif /* _WIN32 */
if (dir == NULL)
BOOST_THROW_EXCEPTION(std::bad_alloc());
String result;
#ifndef _WIN32
result = dirname(dir);
#else /* _WIN32 */
if (!PathRemoveFileSpec(dir)) {
free(dir);
BOOST_THROW_EXCEPTION(win32_error()
<< boost::errinfo_api_function("PathRemoveFileSpec")
<< errinfo_win32_error(GetLastError()));
}
result = dir;
if (result.IsEmpty())
result = ".";
#endif /* _WIN32 */
free(dir);
return result;
}
/**
* Returns the file component of a path. See basename(3) for details.
*
* @param path The full path.
* @returns The filename.
*/
String Utility::BaseName(const String& path)
{
char *dir = strdup(path.CStr());
String result;
if (dir == NULL)
BOOST_THROW_EXCEPTION(std::bad_alloc());
#ifndef _WIN32
result = basename(dir);
#else /* _WIN32 */
result = PathFindFileName(dir);
#endif /* _WIN32 */
free(dir);
return result;
}
/**
* Null deleter. Used as a parameter for the shared_ptr constructor.
*
* @param - The object that should be deleted.
*/
void Utility::NullDeleter(void *)
{
/* Nothing to do here. */
}
/**
* Returns the current UNIX timestamp including fractions of seconds.
*
* @returns The current time.
*/
double Utility::GetTime(void)
{
#ifdef _WIN32
FILETIME cft;
GetSystemTimeAsFileTime(&cft);
ULARGE_INTEGER ucft;
ucft.HighPart = cft.dwHighDateTime;
ucft.LowPart = cft.dwLowDateTime;
SYSTEMTIME est = { 1970, 1, 4, 1, 0, 0, 0, 0};
FILETIME eft;
SystemTimeToFileTime(&est, &eft);
ULARGE_INTEGER ueft;
ueft.HighPart = eft.dwHighDateTime;
ueft.LowPart = eft.dwLowDateTime;
return ((ucft.QuadPart - ueft.QuadPart) / 10000) / 1000.0;
#else /* _WIN32 */
struct timeval tv;
if (gettimeofday(&tv, NULL) < 0) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("gettimeofday")
<< boost::errinfo_errno(errno));
}
return tv.tv_sec + tv.tv_usec / 1000000.0;
#endif /* _WIN32 */
}
/**
* Returns the ID of the current process.
*
* @returns The PID.
*/
pid_t Utility::GetPid(void)
{
#ifndef _WIN32
return getpid();
#else /* _WIN32 */
return GetCurrentProcessId();
#endif /* _WIN32 */
}
/**
* Sleeps for the specified amount of time.
*
* @param timeout The timeout in seconds.
*/
void Utility::Sleep(double timeout)
{
#ifndef _WIN32
usleep(timeout * 1000 * 1000);
#else /* _WIN32 */
::Sleep(timeout * 1000);
#endif /* _WIN32 */
}
/**
* Loads the specified library.
*
* @param library The name of the library.
*/
#ifdef _WIN32
HMODULE
#else /* _WIN32 */
void *
#endif /* _WIN32 */
Utility::LoadExtensionLibrary(const String& library)
{
String path;
#if defined(_WIN32)
path = library + ".dll";
#elif defined(__APPLE__)
path = "lib" + library + ".dylib";
#else /* __APPLE__ */
path = "lib" + library + ".so";
#endif /* _WIN32 */
Log(LogInformation, "base", "Loading library '" + path + "'");
#ifdef _WIN32
HMODULE hModule = LoadLibrary(path.CStr());
if (hModule == NULL) {
BOOST_THROW_EXCEPTION(win32_error()
<< boost::errinfo_api_function("LoadLibrary")
<< errinfo_win32_error(GetLastError())
<< boost::errinfo_file_name(path));
}
#else /* _WIN32 */
void *hModule = dlopen(path.CStr(), RTLD_NOW);
if (hModule == NULL) {
BOOST_THROW_EXCEPTION(std::runtime_error("Could not load library '" + path + "': " + dlerror()));
}
#endif /* _WIN32 */
return hModule;
}
/**
* Generates a new unique ID.
*
* @returns The new unique ID.
*/
String Utility::NewUniqueID(void)
{
static boost::mutex mutex;
static int next_id = 0;
/* I'd much rather use UUIDs but RHEL is way too cool to have
* a semi-recent version of boost. Yay. */
String id;
char buf[128];
if (gethostname(buf, sizeof(buf)) == 0)
id = String(buf) + "-";
id += Convert::ToString((long)Utility::GetTime()) + "-";
{
boost::mutex::scoped_lock lock(mutex);
id += Convert::ToString(next_id);
next_id++;
}
return id;
}
/**
* Calls the specified callback for each file matching the path specification.
*
* @param pathSpec The path specification.
* @param callback The callback which is invoked for each matching file.
* @param type The file type (a combination of GlobFile and GlobDirectory)
*/
bool Utility::Glob(const String& pathSpec, const boost::function<void (const String&)>& callback, int type)
{
#ifdef _WIN32
HANDLE handle;
WIN32_FIND_DATA wfd;
handle = FindFirstFile(pathSpec.CStr(), &wfd);
if (handle == INVALID_HANDLE_VALUE) {
DWORD errorCode = GetLastError();
if (errorCode == ERROR_FILE_NOT_FOUND)
return false;
BOOST_THROW_EXCEPTION(win32_error()
<< boost::errinfo_api_function("FindFirstFile")
<< errinfo_win32_error(errorCode)
<< boost::errinfo_file_name(pathSpec));
}
do {
if ((wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) && !(type & GlobDirectory))
continue;
if (!(wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) && !(type & GlobFile))
continue;
callback(DirName(pathSpec) + "/" + wfd.cFileName);
} while (FindNextFile(handle, &wfd));
if (!FindClose(handle)) {
BOOST_THROW_EXCEPTION(win32_error()
<< boost::errinfo_api_function("FindClose")
<< errinfo_win32_error(GetLastError()));
}
return true;
#else /* _WIN32 */
glob_t gr;
int rc = glob(pathSpec.CStr(), GLOB_ERR | GLOB_NOSORT, NULL, &gr);
if (rc < 0) {
if (rc == GLOB_NOMATCH)
return false;
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("glob")
<< boost::errinfo_errno(errno)
<< boost::errinfo_file_name(pathSpec));
}
if (gr.gl_pathc == 0) {
globfree(&gr);
return false;
}
size_t left;
char **gp;
for (gp = gr.gl_pathv, left = gr.gl_pathc; left > 0; gp++, left--) {
struct stat statbuf;
if (stat(*gp, &statbuf) < 0)
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("stat")
<< boost::errinfo_errno(errno));
if (!S_ISDIR(statbuf.st_mode) && !S_ISREG(statbuf.st_mode))
continue;
if (S_ISDIR(statbuf.st_mode) && !(type & GlobDirectory))
continue;
if (!S_ISDIR(statbuf.st_mode) && !(type & GlobFile))
continue;
callback(*gp);
}
globfree(&gr);
return true;
#endif /* _WIN32 */
}
/**
* Calls the specified callback for each file in the specified directory
* or any of its child directories if the file name matches the specified
* pattern.
*
* @param path The path.
* @param pattern The pattern.
* @param callback The callback which is invoked for each matching file.
* @param type The file type (a combination of GlobFile and GlobDirectory)
*/
bool Utility::GlobRecursive(const String& path, const String& pattern, const boost::function<void (const String&)>& callback, int type)
{
#ifdef _WIN32
HANDLE handle;
WIN32_FIND_DATA wfd;
String pathSpec = path + "/*";
handle = FindFirstFile(pathSpec.CStr(), &wfd);
if (handle == INVALID_HANDLE_VALUE) {
DWORD errorCode = GetLastError();
if (errorCode == ERROR_FILE_NOT_FOUND)
return false;
BOOST_THROW_EXCEPTION(win32_error()
<< boost::errinfo_api_function("FindFirstFile")
<< errinfo_win32_error(errorCode)
<< boost::errinfo_file_name(pathSpec));
}
do {
String cpath = path + "/" + wfd.cFileName;
if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
GlobRecursive(cpath, pattern, callback, type);
if ((wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) && !(type & GlobDirectory))
continue;
if (!(wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) && !(type & GlobFile))
continue;
if (!Utility::Match(pattern, wfd.cFileName))
continue;
callback(cpath);
} while (FindNextFile(handle, &wfd));
if (!FindClose(handle)) {
BOOST_THROW_EXCEPTION(win32_error()
<< boost::errinfo_api_function("FindClose")
<< errinfo_win32_error(GetLastError()));
}
#else /* _WIN32 */
DIR *dirp;
dirp = opendir(path.CStr());
if (dirp == NULL)
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("opendir")
<< boost::errinfo_errno(errno));
while (dirp) {
dirent ent, *pent;
if (readdir_r(dirp, &ent, &pent) < 0)
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("readdir_r")
<< boost::errinfo_errno(errno));
if (!pent)
break;
if (strcmp(ent.d_name, ".") == 0 || strcmp(ent.d_name, "..") == 0)
continue;
String cpath = path + "/" + ent.d_name;
struct stat statbuf;
if (lstat(cpath.CStr(), &statbuf) < 0)
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("lstat")
<< boost::errinfo_errno(errno));
if (S_ISDIR(statbuf.st_mode))
GlobRecursive(cpath, pattern, callback, type);
if (stat(cpath.CStr(), &statbuf) < 0)
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("stat")
<< boost::errinfo_errno(errno));
if (!S_ISDIR(statbuf.st_mode) && !S_ISREG(statbuf.st_mode))
continue;
if (S_ISDIR(statbuf.st_mode) && !(type & GlobDirectory))
continue;
if (!S_ISDIR(statbuf.st_mode) && !(type & GlobFile))
continue;
if (!Utility::Match(pattern, ent.d_name))
continue;
callback(cpath);
}
#endif /* _WIN32 */
return true;
}
#ifndef _WIN32
void Utility::SetNonBlocking(int fd)
{
int flags = fcntl(fd, F_GETFL, 0);
if (flags < 0) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("fcntl")
<< boost::errinfo_errno(errno));
}
if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("fcntl")
<< boost::errinfo_errno(errno));
}
}
void Utility::SetCloExec(int fd)
{
int flags = fcntl(fd, F_GETFD, 0);
if (flags < 0) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("fcntl")
<< boost::errinfo_errno(errno));
}
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("fcntl")
<< boost::errinfo_errno(errno));
}
}
#endif /* _WIN32 */
void Utility::SetNonBlockingSocket(SOCKET s)
{
#ifndef _WIN32
SetNonBlocking(s);
#else /* _WIN32 */
unsigned long lTrue = 1;
ioctlsocket(s, FIONBIO, &lTrue);
#endif /* _WIN32 */
}
void Utility::QueueAsyncCallback(const boost::function<void (void)>& callback)
{
Application::GetTP().Post(callback);
}
String Utility::FormatDateTime(const char *format, double ts)
{
char timestamp[128];
time_t tempts = (time_t)ts; /* We don't handle sub-second timestamps here just yet. */
tm tmthen;
#ifdef _MSC_VER
tm *temp = localtime(&tempts);
if (temp == NULL) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("localtime")
<< boost::errinfo_errno(errno));
}
tmthen = *temp;
#else /* _MSC_VER */
if (localtime_r(&tempts, &tmthen) == NULL) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("localtime_r")
<< boost::errinfo_errno(errno));
}
#endif /* _MSC_VER */
strftime(timestamp, sizeof(timestamp), format, &tmthen);
return timestamp;
}
String Utility::EscapeShellCmd(const String& s)
{
String result;
size_t prev_quote = String::NPos;
int index = -1;
BOOST_FOREACH(char ch, s) {
bool escape = false;
index++;
#ifdef _WIN32
if (ch == '%' || ch == '"' || ch == '\'')
escape = true;
#else /* _WIN32 */
if (ch == '"' || ch == '\'') {
/* Find a matching closing quotation character. */
if (prev_quote == String::NPos && (prev_quote = s.FindFirstOf(ch, index + 1)) != String::NPos)
; /* Empty statement. */
else if (prev_quote != String::NPos && s[prev_quote] == ch)
prev_quote = String::NPos;
else
escape = true;
}
#endif /* _WIN32 */
if (ch == '#' || ch == '&' || ch == ';' || ch == '`' || ch == '|' ||
ch == '*' || ch == '?' || ch == '~' || ch == '<' || ch == '>' ||
ch == '^' || ch == '(' || ch == ')' || ch == '[' || ch == ']' ||
ch == '{' || ch == '}' || ch == '$' || ch == '\\' || ch == '\x0A' ||
ch == '\xFF')
escape = true;
if (escape)
#ifdef _WIN32
result += '^';
#else /* _WIN32 */
result += '\\';
#endif /* _WIN32 */
result += ch;
}
return result;
}
#ifdef _WIN32
static void WindowsSetThreadName(const char *name)
{
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = name;
info.dwThreadID = -1;
info.dwFlags = 0;
__try {
RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)&info);
} __except(EXCEPTION_EXECUTE_HANDLER) {
/* Nothing to do here. */
}
}
#endif /* _WIN32 */
void Utility::SetThreadName(const String& name, bool os)
{
m_ThreadName.reset(new String(name));
if (!os)
return;
#ifdef _WIN32
WindowsSetThreadName(name.CStr());
#endif /* _WIN32 */
#ifdef HAVE_PTHREAD_SET_NAME_NP
pthread_set_name_np(pthread_self(), name.CStr());
#endif /* HAVE_PTHREAD_SET_NAME_NP */
#ifdef HAVE_PTHREAD_SETNAME_NP
# ifdef __APPLE__
pthread_setname_np(name.CStr());
# else /* __APPLE__ */
String tname = name.SubStr(0, 15);
pthread_setname_np(pthread_self(), tname.CStr());
# endif /* __APPLE__ */
#endif /* HAVE_PTHREAD_SETNAME_NP */
}
String Utility::GetThreadName(void)
{
String *name = m_ThreadName.get();
if (!name) {
std::ostringstream idbuf;
idbuf << boost::this_thread::get_id();
return idbuf.str();
}
return *name;
}
unsigned long Utility::SDBM(const String& str, size_t len)
{
unsigned long hash = 0;
size_t current = 0;
BOOST_FOREACH(char c, str) {
if (current >= len)
break;
hash = c + (hash << 6) + (hash << 16) - hash;
current++;
}
return hash;
}
int Utility::CompareVersion(const String& v1, const String& v2)
{
std::vector<String> tokensv1, tokensv2;
boost::algorithm::split(tokensv1, v1, boost::is_any_of("."));
boost::algorithm::split(tokensv2, v2, boost::is_any_of("."));
for (int i = 0; i < tokensv2.size() - tokensv1.size(); i++)
tokensv1.push_back("0");
for (int i = 0; i < tokensv1.size() - tokensv2.size(); i++)
tokensv2.push_back("0");
for (size_t i = 0; i < tokensv1.size(); i++) {
if (Convert::ToLong(tokensv2[i]) > Convert::ToLong(tokensv1[i]))
return 1;
else if (Convert::ToLong(tokensv2[i]) < Convert::ToLong(tokensv1[i]))
return -1;
}
return 0;
}
int Utility::Random(void)
{
#ifdef _WIN32
return rand();
#else /* _WIN32 */
unsigned int *seed = m_RandSeed.get();
if (!seed) {
seed = new unsigned int(Utility::GetTime());
m_RandSeed.reset(seed);
}
return rand_r(seed);
#endif /* _WIN32 */
}
tm Utility::LocalTime(time_t ts)
{
#ifdef _MSC_VER
tm *result = localtime(&ts);
if (result == NULL) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("localtime")
<< boost::errinfo_errno(errno));
}
return *result;
#else /* _MSC_VER */
tm result;
if (localtime_r(&ts, &result) == NULL) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("localtime_r")
<< boost::errinfo_errno(errno));
}
return result;
#endif /* _MSC_VER */
}
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