713 lines
20 KiB
C++
713 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef INCLUDED_UTIL_HPP
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#define INCLUDED_UTIL_HPP
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#include <cassert>
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#include <cerrno>
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#include <cstddef>
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#include <cstring>
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#include <atomic>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <set>
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#include <sstream>
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#include <string>
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#include <memory.h>
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#ifndef __linux
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#include <thread>
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#endif
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#include <Poco/File.h>
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#include <Poco/Path.h>
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#include <Poco/Process.h>
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#include <Poco/RegularExpression.h>
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#define LOK_USE_UNSTABLE_API
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#include <LibreOfficeKit/LibreOfficeKitEnums.h>
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namespace Util
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{
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namespace rng
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{
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void reseed();
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unsigned getNext();
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/// Generate an array of random characters.
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std::vector<char> getBytes(const size_t length);
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/// Generates a random string suitable for
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/// file/directory names.
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std::string getFilename(const size_t length);
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}
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/// Create randomized temporary directory
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std::string createRandomTmpDir();
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#ifndef MOBILEAPP
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/// Get number of threads in this process or -1 on error
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int getProcessThreadCount();
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/// Spawn a process if stdInput is non-NULL it contains a writable descriptor
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/// to send data to the child.
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int spawnProcess(const std::string &cmd, const std::vector<std::string> &args,
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int *stdInput = nullptr);
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#endif
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/// Hex to unsigned char
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bool dataFromHexString(const std::string& hexString, std::vector<unsigned char>& data);
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/// Encode an integral ID into a string, with padding support.
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std::string encodeId(const unsigned number, const int padding = 5);
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/// Decode an integral ID from a string.
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unsigned decodeId(const std::string& str);
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bool windowingAvailable();
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#if !defined(BUILDING_TESTS) && !defined(KIT_IN_PROCESS) && !defined(MOBILEAPP)
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/// Send a message to all clients.
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void alertAllUsers(const std::string& msg);
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/// Send a 'error:' message with the specified cmd and kind parameters to all connected
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/// clients. This function can be called either in loolwsd or loolkit processes, even if only
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/// loolwsd obviously has contact with the actual clients; in loolkit it will be forwarded to
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/// loolwsd for redistribution. (This function must be implemented separately in each program
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/// that uses it, it is not in Util.cpp.)
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void alertAllUsers(const std::string& cmd, const std::string& kind);
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#else
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/// No-op implementation in the test programs
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inline void alertAllUsers(const std::string&)
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{
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}
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/// No-op implementation in the test programs
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inline void alertAllUsers(const std::string&, const std::string&)
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{
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}
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#endif
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/// Assert that a lock is already taken.
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template <typename T>
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void assertIsLocked(const T& lock)
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{
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#ifdef NDEBUG
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(void) lock;
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#else
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assert(lock.owns_lock());
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#endif
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}
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inline void assertIsLocked(std::mutex& mtx)
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{
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#ifdef NDEBUG
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(void) mtx;
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#else
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assert(!mtx.try_lock());
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#endif
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}
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#ifndef MOBILEAPP
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/// Print given number of bytes in human-understandable form (KB,MB, etc.)
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std::string getHumanizedBytes(unsigned long nBytes);
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/// Returns the total physical memory (in kB) available in the system
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size_t getTotalSystemMemoryKb();
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/// Returns the process PSS in KB (works only when we have perms for /proc/pid/smaps).
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size_t getMemoryUsagePSS(const Poco::Process::PID pid);
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/// Returns the process RSS in KB.
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size_t getMemoryUsageRSS(const Poco::Process::PID pid);
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/// Returns the RSS and PSS of the current process in KB.
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/// Example: "procmemstats: pid=123 rss=12400 pss=566"
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std::string getMemoryStats(FILE* file);
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size_t getCpuUsage(const Poco::Process::PID pid);
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size_t getStatFromPid(const Poco::Process::PID pid, int ind);
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#endif
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std::string replace(std::string s, const std::string& a, const std::string& b);
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std::string formatLinesForLog(const std::string& s);
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void setThreadName(const std::string& s);
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const char *getThreadName();
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#ifdef __linux
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pid_t getThreadId();
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#else
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std::thread::id getThreadId();
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#endif
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/// Get version information
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void getVersionInfo(std::string& version, std::string& hash);
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/// Return a string that is unique across processes and calls.
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std::string UniqueId();
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// Extract all json entries into a map.
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std::map<std::string, std::string> JsonToMap(const std::string& jsonString);
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/// Dump a lineof data as hex
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inline std::string stringifyHexLine(
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const std::vector<char> &buffer,
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unsigned int offset,
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const unsigned int width = 32)
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{
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char scratch[64];
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std::stringstream os;
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for (unsigned int i = 0; i < width; i++)
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{
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if (i && (i % 8) == 0)
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os << " ";
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if ((offset + i) < buffer.size())
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sprintf (scratch, "%.2x ", (unsigned char)buffer[offset+i]);
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else
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sprintf (scratch, " ");
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os << scratch;
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}
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os << " | ";
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for (unsigned int i = 0; i < width; i++)
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{
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if ((offset + i) < buffer.size() && ::isprint(buffer[offset+i]))
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sprintf (scratch, "%c", buffer[offset+i]);
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else
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sprintf (scratch, ".");
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os << scratch;
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}
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return os.str();
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}
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/// Dump data as hex and chars to stream
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inline void dumpHex (std::ostream &os, const char *legend, const char *prefix,
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const std::vector<char> &buffer, bool skipDup = true,
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const unsigned int width = 32)
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{
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unsigned int j;
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char scratch[64];
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int skip = 0;
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std::string lastLine;
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os << legend;
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for (j = 0; j < buffer.size() + width - 1; j += width)
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{
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sprintf (scratch, "%s0x%.4x ", prefix, j);
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os << scratch;
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std::string line = stringifyHexLine(buffer, j, width);
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if (skipDup && lastLine == line)
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skip++;
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else {
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if (skip > 0)
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{
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os << "... dup " << skip - 1 << "...";
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skip = 0;
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}
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else
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os << line;
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}
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lastLine.swap(line);
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os << "\n";
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}
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os.flush();
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}
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/// Trim spaces from the left. Just spaces.
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inline std::string& ltrim(std::string& s)
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{
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const size_t pos = s.find_first_not_of(' ');
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if (pos != std::string::npos)
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{
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s = s.substr(pos);
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}
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return s;
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}
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/// Trim spaces from the left and copy. Just spaces.
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inline std::string ltrimmed(const std::string& s)
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{
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const size_t pos = s.find_first_not_of(' ');
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if (pos != std::string::npos)
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{
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return s.substr(pos);
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}
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return s;
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}
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/// Trim spaces from both left and right. Just spaces.
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inline std::string& trim(std::string& s)
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{
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const size_t first = s.find_first_not_of(' ');
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const size_t last = s.find_last_not_of(' ');
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if (first != std::string::npos)
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{
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if (last != std::string::npos)
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{
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s = s.substr(first, last + 1 - first);
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}
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else
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{
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s = s.substr(first);
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}
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}
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else
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{
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if (last != std::string::npos)
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{
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s = s.substr(0, last + 1);
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}
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else
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{
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s.clear();
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}
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}
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return s;
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}
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/// Trim spaces from both left and right and copy. Just spaces.
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inline std::string trimmed(const std::string& s)
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{
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const size_t first = s.find_first_not_of(' ');
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const size_t last = s.find_last_not_of(' ');
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if (first != std::string::npos)
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{
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if (last != std::string::npos)
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{
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return s.substr(first, last + 1 - first);
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}
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return s.substr(first);
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}
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if (last != std::string::npos)
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{
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return s.substr(0, last + 1);
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}
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return std::string();
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}
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/// Trim spaces from left and right. Just spaces.
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inline std::string trimmed(const char* s)
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{
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return trimmed(std::string(s));
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}
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/// Return true iff s starts with t.
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inline bool startsWith(const std::string& s, const std::string& t)
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{
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return s.length() >= t.length() && memcmp(s.c_str(), t.c_str(), t.length()) == 0;
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}
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/// Return true iff s starts with t.
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inline bool startsWith(const std::string& s, const char* t)
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{
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if (t != nullptr && !s.empty())
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{
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const size_t len = std::strlen(t);
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return s.length() >= len && memcmp(s.c_str(), t, len) == 0;
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}
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return false;
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}
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/// Return the symbolic name for an errno value, or in decimal if not handled here.
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inline std::string symbolicErrno(int e)
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{
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// Errnos from <asm-generic/errno-base.h> and <asm-generic/errno.h> on Linux.
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switch (e)
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{
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case EPERM: return "EPERM";
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case ENOENT: return "ENOENT";
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case ESRCH: return "ESRCH";
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case EINTR: return "EINTR";
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case EIO: return "EIO";
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case ENXIO: return "ENXIO";
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case E2BIG: return "E2BIG";
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case ENOEXEC: return "ENOEXEC";
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case EBADF: return "EBADF";
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case ECHILD: return "ECHILD";
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case EAGAIN: return "EAGAIN";
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case ENOMEM: return "ENOMEM";
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case EACCES: return "EACCES";
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case EFAULT: return "EFAULT";
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case ENOTBLK: return "ENOTBLK";
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case EBUSY: return "EBUSY";
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case EEXIST: return "EEXIST";
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case EXDEV: return "EXDEV";
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case ENODEV: return "ENODEV";
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case ENOTDIR: return "ENOTDIR";
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case EISDIR: return "EISDIR";
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case EINVAL: return "EINVAL";
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case ENFILE: return "ENFILE";
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case EMFILE: return "EMFILE";
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case ENOTTY: return "ENOTTY";
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case ETXTBSY: return "ETXTBSY";
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case EFBIG: return "EFBIG";
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case ENOSPC: return "ENOSPC";
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case ESPIPE: return "ESPIPE";
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case EROFS: return "EROFS";
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case EMLINK: return "EMLINK";
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case EPIPE: return "EPIPE";
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case EDOM: return "EDOM";
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case ERANGE: return "ERANGE";
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case EDEADLK: return "EDEADLK";
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case ENAMETOOLONG: return "ENAMETOOLONG";
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case ENOLCK: return "ENOLCK";
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case ENOSYS: return "ENOSYS";
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case ENOTEMPTY: return "ENOTEMPTY";
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case ELOOP: return "ELOOP";
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case ENOMSG: return "ENOMSG";
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case EIDRM: return "EIDRM";
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#ifdef ECHRNG
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case ECHRNG: return "ECHRNG";
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#endif
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#ifdef EL2NSYNC
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case EL2NSYNC: return "EL2NSYNC";
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#endif
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#ifdef EL3HLT
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case EL3HLT: return "EL3HLT";
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#endif
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#ifdef EL3RST
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case EL3RST: return "EL3RST";
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#endif
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#ifdef ELNRNG
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case ELNRNG: return "ELNRNG";
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#endif
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#ifdef EUNATCH
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case EUNATCH: return "EUNATCH";
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#endif
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#ifdef ENOCSI
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case ENOCSI: return "ENOCSI";
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#endif
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#ifdef EL2HLT
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case EL2HLT: return "EL2HLT";
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#endif
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#ifdef EBADE
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case EBADE: return "EBADE";
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#endif
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#ifdef EBADR
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case EBADR: return "EBADR";
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#endif
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#ifdef EXFULL
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case EXFULL: return "EXFULL";
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#endif
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#ifdef ENOANO
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case ENOANO: return "ENOANO";
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#endif
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#ifdef EBADRQC
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case EBADRQC: return "EBADRQC";
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#endif
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#ifdef EBADSLT
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case EBADSLT: return "EBADSLT";
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#endif
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#ifdef EBFONT
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case EBFONT: return "EBFONT";
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#endif
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case ENOSTR: return "ENOSTR";
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case ENODATA: return "ENODATA";
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case ETIME: return "ETIME";
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case ENOSR: return "ENOSR";
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#ifdef ENONET
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case ENONET: return "ENONET";
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#endif
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#ifdef ENOPKG
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case ENOPKG: return "ENOPKG";
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#endif
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case EREMOTE: return "EREMOTE";
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case ENOLINK: return "ENOLINK";
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#ifdef EADV
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case EADV: return "EADV";
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#endif
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#ifdef ESRMNT
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case ESRMNT: return "ESRMNT";
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#endif
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#ifdef ECOMM
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case ECOMM: return "ECOMM";
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#endif
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case EPROTO: return "EPROTO";
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case EMULTIHOP: return "EMULTIHOP";
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#ifdef EDOTDOT
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case EDOTDOT: return "EDOTDOT";
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#endif
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case EBADMSG: return "EBADMSG";
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case EOVERFLOW: return "EOVERFLOW";
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#ifdef ENOTUNIQ
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case ENOTUNIQ: return "ENOTUNIQ";
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#endif
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#ifdef EBADFD
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case EBADFD: return "EBADFD";
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#endif
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#ifdef EREMCHG
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case EREMCHG: return "EREMCHG";
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#endif
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#ifdef ELIBACC
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case ELIBACC: return "ELIBACC";
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#endif
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#ifdef ELIBBAD
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case ELIBBAD: return "ELIBBAD";
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#endif
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#ifdef ELIBSCN
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case ELIBSCN: return "ELIBSCN";
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#endif
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#ifdef ELIBMAX
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case ELIBMAX: return "ELIBMAX";
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#endif
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#ifdef ELIBEXEC
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case ELIBEXEC: return "ELIBEXEC";
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#endif
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case EILSEQ: return "EILSEQ";
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#ifdef ERESTART
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case ERESTART: return "ERESTART";
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#endif
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#ifdef ESTRPIPE
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case ESTRPIPE: return "ESTRPIPE";
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#endif
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case EUSERS: return "EUSERS";
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case ENOTSOCK: return "ENOTSOCK";
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case EDESTADDRREQ: return "EDESTADDRREQ";
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case EMSGSIZE: return "EMSGSIZE";
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case EPROTOTYPE: return "EPROTOTYPE";
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case ENOPROTOOPT: return "ENOPROTOOPT";
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case EPROTONOSUPPORT: return "EPROTONOSUPPORT";
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case ESOCKTNOSUPPORT: return "ESOCKTNOSUPPORT";
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case EOPNOTSUPP: return "EOPNOTSUPP";
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case EPFNOSUPPORT: return "EPFNOSUPPORT";
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case EAFNOSUPPORT: return "EAFNOSUPPORT";
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case EADDRINUSE: return "EADDRINUSE";
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case EADDRNOTAVAIL: return "EADDRNOTAVAIL";
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case ENETDOWN: return "ENETDOWN";
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case ENETUNREACH: return "ENETUNREACH";
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case ENETRESET: return "ENETRESET";
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case ECONNABORTED: return "ECONNABORTED";
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case ECONNRESET: return "ECONNRESET";
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case ENOBUFS: return "ENOBUFS";
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case EISCONN: return "EISCONN";
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case ENOTCONN: return "ENOTCONN";
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case ESHUTDOWN: return "ESHUTDOWN";
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case ETOOMANYREFS: return "ETOOMANYREFS";
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case ETIMEDOUT: return "ETIMEDOUT";
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case ECONNREFUSED: return "ECONNREFUSED";
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case EHOSTDOWN: return "EHOSTDOWN";
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case EHOSTUNREACH: return "EHOSTUNREACH";
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case EALREADY: return "EALREADY";
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case EINPROGRESS: return "EINPROGRESS";
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case ESTALE: return "ESTALE";
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#ifdef EUCLEAN
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case EUCLEAN: return "EUCLEAN";
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#endif
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#ifdef ENOTNAM
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case ENOTNAM: return "ENOTNAM";
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#endif
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#ifdef ENAVAIL
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case ENAVAIL: return "ENAVAIL";
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#endif
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#ifdef EISNAM
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case EISNAM: return "EISNAM";
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#endif
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#ifdef EREMOTEIO
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case EREMOTEIO: return "EREMOTEIO";
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#endif
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case EDQUOT: return "EDQUOT";
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#ifdef ENOMEDIUM
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case ENOMEDIUM: return "ENOMEDIUM";
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#endif
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#ifdef EMEDIUMTYPE
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case EMEDIUMTYPE: return "EMEDIUMTYPE";
|
|
#endif
|
|
case ECANCELED: return "ECANCELED";
|
|
#ifdef ENOKEY
|
|
case ENOKEY: return "ENOKEY";
|
|
#endif
|
|
#ifdef EKEYEXPIRED
|
|
case EKEYEXPIRED: return "EKEYEXPIRED";
|
|
#endif
|
|
#ifdef EKEYREVOKED
|
|
case EKEYREVOKED: return "EKEYREVOKED";
|
|
#endif
|
|
#ifdef EKEYREJECTED
|
|
case EKEYREJECTED: return "EKEYREJECTED";
|
|
#endif
|
|
case EOWNERDEAD: return "EOWNERDEAD";
|
|
case ENOTRECOVERABLE: return "ENOTRECOVERABLE";
|
|
#ifdef ERFKILL
|
|
case ERFKILL: return "ERFKILL";
|
|
#endif
|
|
#ifdef EHWPOISON
|
|
case EHWPOISON: return "EHWPOISON";
|
|
#endif
|
|
default: return std::to_string(e);
|
|
}
|
|
}
|
|
|
|
/// Check for the URI scheme validity.
|
|
/// For now just a basic sanity check, can be extended if necessary.
|
|
bool isValidURIScheme(const std::string& scheme);
|
|
|
|
/// Check for the URI host validity.
|
|
/// For now just a basic sanity check, can be extended if necessary.
|
|
bool isValidURIHost(const std::string& host);
|
|
|
|
/// Anonymize a sensitive string to avoid leaking it.
|
|
/// Called on strings to be logged or exposed.
|
|
std::string anonymize(const std::string& text);
|
|
|
|
/// Anonymize the basename of filenames only, preserving the path and extension.
|
|
std::string anonymizeUrl(const std::string& url);
|
|
|
|
/// Given one or more patterns to allow, and one or more to deny,
|
|
/// the match member will return true if, and only if, the subject
|
|
/// matches the allowed list, but not the deny.
|
|
/// By default, everything is denied.
|
|
class RegexListMatcher
|
|
{
|
|
public:
|
|
RegexListMatcher() :
|
|
_allowByDefault(false)
|
|
{
|
|
}
|
|
|
|
RegexListMatcher(const bool allowByDefault) :
|
|
_allowByDefault(allowByDefault)
|
|
{
|
|
}
|
|
|
|
RegexListMatcher(std::initializer_list<std::string> allowed) :
|
|
_allowByDefault(false),
|
|
_allowed(allowed)
|
|
{
|
|
}
|
|
|
|
RegexListMatcher(std::initializer_list<std::string> allowed,
|
|
std::initializer_list<std::string> denied) :
|
|
_allowByDefault(false),
|
|
_allowed(allowed),
|
|
_denied(denied)
|
|
{
|
|
}
|
|
|
|
RegexListMatcher(const bool allowByDefault,
|
|
std::initializer_list<std::string> denied) :
|
|
_allowByDefault(allowByDefault),
|
|
_denied(denied)
|
|
{
|
|
}
|
|
|
|
void allow(const std::string& pattern) { _allowed.insert(pattern); }
|
|
void deny(const std::string& pattern)
|
|
{
|
|
_allowed.erase(pattern);
|
|
_denied.insert(pattern);
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
_allowed.clear();
|
|
_denied.clear();
|
|
}
|
|
|
|
bool match(const std::string& subject) const
|
|
{
|
|
return (_allowByDefault || match(_allowed, subject)) && !match(_denied, subject);
|
|
}
|
|
|
|
private:
|
|
static bool match(const std::set<std::string>& set, const std::string& subject)
|
|
{
|
|
if (set.find(subject) != set.end())
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Not a perfect match, try regex.
|
|
for (const auto& value : set)
|
|
{
|
|
try
|
|
{
|
|
// Not performance critical to warrant caching.
|
|
Poco::RegularExpression re(value, Poco::RegularExpression::RE_CASELESS);
|
|
Poco::RegularExpression::Match reMatch;
|
|
|
|
// Must be a full match.
|
|
if (re.match(subject, reMatch) && reMatch.offset == 0 && reMatch.length == subject.size())
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
catch (const std::exception& exc)
|
|
{
|
|
// Nothing to do; skip.
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private:
|
|
const bool _allowByDefault;
|
|
std::set<std::string> _allowed;
|
|
std::set<std::string> _denied;
|
|
};
|
|
|
|
/// A logical constant that is allowed to initialize
|
|
/// exactly once and checks usage before initialization.
|
|
template <typename T>
|
|
class RuntimeConstant
|
|
{
|
|
T _value;
|
|
std::atomic<bool> _initialized;
|
|
|
|
public:
|
|
RuntimeConstant()
|
|
: _value()
|
|
, _initialized(false)
|
|
{
|
|
}
|
|
|
|
/// Use a compile-time const instead.
|
|
RuntimeConstant(const T& value) = delete;
|
|
|
|
const T& get()
|
|
{
|
|
if (_initialized)
|
|
{
|
|
return _value;
|
|
}
|
|
|
|
throw std::runtime_error("RuntimeConstant instance read before being initialized.");
|
|
}
|
|
|
|
void set(const T& value)
|
|
{
|
|
assert(!_initialized);
|
|
|
|
_initialized = true;
|
|
_value = value;
|
|
}
|
|
};
|
|
} // end namespace Util
|
|
|
|
#endif
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|