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CMake/Source/cmSystemTools.cxx
Brad King a4c19cb895 Windows: Restore suppression of error report popups in CI builds 
On Windows, libuv uses `_CrtSetReportHook` to install a handler it uses
to suppress assertions on invalid file descriptors in `_get_osfhandle`.
This removes the handler we install in CI environments to suppress
interactive popups.  Move installation of our handler to after libuv is
initialized so that our handler is actually used.

Unfortunately this also removes libuv's handler and so may cause Debug
builds under CI to abort on invalid file descriptors instead of simply
converting them to `INVALID_HANDLE_VALUE`.  If this becomes a problem
we may need to modify libuv to make its hook more configurable.
2019-11-15 09:23:47 -05:00

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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmSystemTools.h"
#include "cm_uv.h"
#include "cmAlgorithms.h"
#include "cmDuration.h"
#include "cmProcessOutput.h"
#include "cmRange.h"
#include "cmStringAlgorithms.h"
#if !defined(CMAKE_BOOTSTRAP)
# include "cm_libarchive.h"
# include "cmArchiveWrite.h"
# include "cmLocale.h"
# ifndef __LA_INT64_T
# define __LA_INT64_T la_int64_t
# endif
# ifndef __LA_SSIZE_T
# define __LA_SSIZE_T la_ssize_t
# endif
#endif
#if !defined(CMAKE_BOOTSTRAP)
# include "cmCryptoHash.h"
#endif
#if defined(CMAKE_USE_ELF_PARSER)
# include "cmELF.h"
#endif
#if defined(CMAKE_USE_MACH_PARSER)
# include "cmMachO.h"
#endif
#include <algorithm>
#include <cassert>
#include <cctype>
#include <cerrno>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <iostream>
#include <sstream>
#include <utility>
#include <vector>
#include <fcntl.h>
#include "cmsys/Directory.hxx"
#include "cmsys/Encoding.hxx"
#include "cmsys/FStream.hxx"
#include "cmsys/RegularExpression.hxx"
#include "cmsys/System.h"
#include "cmsys/Terminal.h"
#if defined(_WIN32)
# include <windows.h>
// include wincrypt.h after windows.h
# include <wincrypt.h>
#else
# include <unistd.h>
# include <sys/time.h>
#endif
#if defined(_WIN32) && \
(defined(_MSC_VER) || defined(__WATCOMC__) || defined(__MINGW32__))
# include <io.h>
#endif
#if defined(__APPLE__)
# include <mach-o/dyld.h>
#endif
#ifdef __QNX__
# include <malloc.h> /* for malloc/free on QNX */
#endif
namespace {
cmSystemTools::InterruptCallback s_InterruptCallback;
cmSystemTools::MessageCallback s_MessageCallback;
cmSystemTools::OutputCallback s_StderrCallback;
cmSystemTools::OutputCallback s_StdoutCallback;
} // namespace
#if !defined(HAVE_ENVIRON_NOT_REQUIRE_PROTOTYPE)
// For GetEnvironmentVariables
# if defined(_WIN32)
extern __declspec(dllimport) char** environ;
# else
extern char** environ;
# endif
#endif
#if !defined(CMAKE_BOOTSTRAP)
static std::string cm_archive_entry_pathname(struct archive_entry* entry)
{
# if cmsys_STL_HAS_WSTRING
return cmsys::Encoding::ToNarrow(archive_entry_pathname_w(entry));
# else
return archive_entry_pathname(entry);
# endif
}
static int cm_archive_read_open_file(struct archive* a, const char* file,
int block_size)
{
# if cmsys_STL_HAS_WSTRING
std::wstring wfile = cmsys::Encoding::ToWide(file);
return archive_read_open_filename_w(a, wfile.c_str(), block_size);
# else
return archive_read_open_filename(a, file, block_size);
# endif
}
#endif
#ifdef _WIN32
#elif defined(__APPLE__)
# include <crt_externs.h>
# define environ (*_NSGetEnviron())
#endif
bool cmSystemTools::s_RunCommandHideConsole = false;
bool cmSystemTools::s_DisableRunCommandOutput = false;
bool cmSystemTools::s_ErrorOccured = false;
bool cmSystemTools::s_FatalErrorOccured = false;
bool cmSystemTools::s_ForceUnixPaths = false;
// replace replace with with as many times as it shows up in source.
// write the result into source.
#if defined(_WIN32) && !defined(__CYGWIN__)
void cmSystemTools::ExpandRegistryValues(std::string& source, KeyWOW64 view)
{
// Regular expression to match anything inside [...] that begins in HKEY.
// Note that there is a special rule for regular expressions to match a
// close square-bracket inside a list delimited by square brackets.
// The "[^]]" part of this expression will match any character except
// a close square-bracket. The ']' character must be the first in the
// list of characters inside the [^...] block of the expression.
cmsys::RegularExpression regEntry("\\[(HKEY[^]]*)\\]");
// check for black line or comment
while (regEntry.find(source)) {
// the arguments are the second match
std::string key = regEntry.match(1);
std::string val;
if (ReadRegistryValue(key.c_str(), val, view)) {
std::string reg = cmStrCat('[', key, ']');
cmSystemTools::ReplaceString(source, reg.c_str(), val.c_str());
} else {
std::string reg = cmStrCat('[', key, ']');
cmSystemTools::ReplaceString(source, reg.c_str(), "/registry");
}
}
}
#else
void cmSystemTools::ExpandRegistryValues(std::string& source,
KeyWOW64 /*unused*/)
{
cmsys::RegularExpression regEntry("\\[(HKEY[^]]*)\\]");
while (regEntry.find(source)) {
// the arguments are the second match
std::string key = regEntry.match(1);
std::string reg = cmStrCat('[', key, ']');
cmSystemTools::ReplaceString(source, reg.c_str(), "/registry");
}
}
#endif
std::string cmSystemTools::HelpFileName(cm::string_view str)
{
std::string name(str);
cmSystemTools::ReplaceString(name, "<", "");
cmSystemTools::ReplaceString(name, ">", "");
return name;
}
void cmSystemTools::Error(const std::string& m)
{
std::string message = "CMake Error: " + m;
cmSystemTools::s_ErrorOccured = true;
cmSystemTools::Message(message, "Error");
}
void cmSystemTools::SetInterruptCallback(InterruptCallback f)
{
s_InterruptCallback = std::move(f);
}
bool cmSystemTools::GetInterruptFlag()
{
if (s_InterruptCallback) {
return s_InterruptCallback();
}
return false;
}
void cmSystemTools::SetMessageCallback(MessageCallback f)
{
s_MessageCallback = std::move(f);
}
void cmSystemTools::SetStdoutCallback(OutputCallback f)
{
s_StdoutCallback = std::move(f);
}
void cmSystemTools::SetStderrCallback(OutputCallback f)
{
s_StderrCallback = std::move(f);
}
void cmSystemTools::Stderr(const std::string& s)
{
if (s_StderrCallback) {
s_StderrCallback(s);
} else {
std::cerr << s << std::flush;
}
}
void cmSystemTools::Stdout(const std::string& s)
{
if (s_StdoutCallback) {
s_StdoutCallback(s);
} else {
std::cout << s << std::flush;
}
}
void cmSystemTools::Message(const std::string& m, const char* title)
{
if (s_MessageCallback) {
s_MessageCallback(m, title);
} else {
std::cerr << m << std::endl;
}
}
void cmSystemTools::ReportLastSystemError(const char* msg)
{
std::string m =
cmStrCat(msg, ": System Error: ", Superclass::GetLastSystemError());
cmSystemTools::Error(m);
}
void cmSystemTools::ParseWindowsCommandLine(const char* command,
std::vector<std::string>& args)
{
// See the MSDN document "Parsing C Command-Line Arguments" at
// http://msdn2.microsoft.com/en-us/library/a1y7w461.aspx for rules
// of parsing the windows command line.
bool in_argument = false;
bool in_quotes = false;
int backslashes = 0;
std::string arg;
for (const char* c = command; *c; ++c) {
if (*c == '\\') {
++backslashes;
in_argument = true;
} else if (*c == '"') {
int backslash_pairs = backslashes >> 1;
int backslash_escaped = backslashes & 1;
arg.append(backslash_pairs, '\\');
backslashes = 0;
if (backslash_escaped) {
/* An odd number of backslashes precede this quote.
It is escaped. */
arg.append(1, '"');
} else {
/* An even number of backslashes precede this quote.
It is not escaped. */
in_quotes = !in_quotes;
}
in_argument = true;
} else {
arg.append(backslashes, '\\');
backslashes = 0;
if (cmIsSpace(*c)) {
if (in_quotes) {
arg.append(1, *c);
} else if (in_argument) {
args.push_back(arg);
arg.clear();
in_argument = false;
}
} else {
in_argument = true;
arg.append(1, *c);
}
}
}
arg.append(backslashes, '\\');
if (in_argument) {
args.push_back(arg);
}
}
class cmSystemToolsArgV
{
char** ArgV;
public:
cmSystemToolsArgV(char** argv)
: ArgV(argv)
{
}
~cmSystemToolsArgV()
{
for (char** arg = this->ArgV; arg && *arg; ++arg) {
free(*arg);
}
free(this->ArgV);
}
cmSystemToolsArgV(const cmSystemToolsArgV&) = delete;
cmSystemToolsArgV& operator=(const cmSystemToolsArgV&) = delete;
void Store(std::vector<std::string>& args) const
{
for (char** arg = this->ArgV; arg && *arg; ++arg) {
args.emplace_back(*arg);
}
}
};
void cmSystemTools::ParseUnixCommandLine(const char* command,
std::vector<std::string>& args)
{
// Invoke the underlying parser.
cmSystemToolsArgV argv(cmsysSystem_Parse_CommandForUnix(command, 0));
argv.Store(args);
}
std::vector<std::string> cmSystemTools::HandleResponseFile(
std::vector<std::string>::const_iterator argBeg,
std::vector<std::string>::const_iterator argEnd)
{
std::vector<std::string> arg_full;
for (std::string const& arg : cmMakeRange(argBeg, argEnd)) {
if (cmHasLiteralPrefix(arg, "@")) {
cmsys::ifstream responseFile(arg.substr(1).c_str(), std::ios::in);
if (!responseFile) {
std::string error = cmStrCat("failed to open for reading (",
cmSystemTools::GetLastSystemError(),
"):\n ", cm::string_view(arg).substr(1));
cmSystemTools::Error(error);
} else {
std::string line;
cmSystemTools::GetLineFromStream(responseFile, line);
std::vector<std::string> args2;
#ifdef _WIN32
cmSystemTools::ParseWindowsCommandLine(line.c_str(), args2);
#else
cmSystemTools::ParseUnixCommandLine(line.c_str(), args2);
#endif
cmAppend(arg_full, args2);
}
} else {
arg_full.push_back(arg);
}
}
return arg_full;
}
std::vector<std::string> cmSystemTools::ParseArguments(const std::string& cmd)
{
std::vector<std::string> args;
std::string arg;
bool win_path = false;
const char* command = cmd.c_str();
if (command[0] && command[1] &&
((command[0] != '/' && command[1] == ':' && command[2] == '\\') ||
(command[0] == '\"' && command[1] != '/' && command[2] == ':' &&
command[3] == '\\') ||
(command[0] == '\'' && command[1] != '/' && command[2] == ':' &&
command[3] == '\\') ||
(command[0] == '\\' && command[1] == '\\'))) {
win_path = true;
}
// Split the command into an argv array.
for (const char* c = command; *c;) {
// Skip over whitespace.
while (*c == ' ' || *c == '\t') {
++c;
}
arg.clear();
if (*c == '"') {
// Parse a quoted argument.
++c;
while (*c && *c != '"') {
arg.append(1, *c);
++c;
}
if (*c) {
++c;
}
args.push_back(arg);
} else if (*c == '\'') {
// Parse a quoted argument.
++c;
while (*c && *c != '\'') {
arg.append(1, *c);
++c;
}
if (*c) {
++c;
}
args.push_back(arg);
} else if (*c) {
// Parse an unquoted argument.
while (*c && *c != ' ' && *c != '\t') {
if (*c == '\\' && !win_path) {
++c;
if (*c) {
arg.append(1, *c);
++c;
}
} else {
arg.append(1, *c);
++c;
}
}
args.push_back(arg);
}
}
return args;
}
bool cmSystemTools::SplitProgramFromArgs(std::string const& command,
std::string& program,
std::string& args)
{
const char* c = command.c_str();
// Skip leading whitespace.
while (isspace(static_cast<unsigned char>(*c))) {
++c;
}
// Parse one command-line element up to an unquoted space.
bool in_escape = false;
bool in_double = false;
bool in_single = false;
for (; *c; ++c) {
if (in_single) {
if (*c == '\'') {
in_single = false;
} else {
program += *c;
}
} else if (in_escape) {
in_escape = false;
program += *c;
} else if (*c == '\\') {
in_escape = true;
} else if (in_double) {
if (*c == '"') {
in_double = false;
} else {
program += *c;
}
} else if (*c == '"') {
in_double = true;
} else if (*c == '\'') {
in_single = true;
} else if (isspace(static_cast<unsigned char>(*c))) {
break;
} else {
program += *c;
}
}
// The remainder of the command line holds unparsed arguments.
args = c;
return !in_single && !in_escape && !in_double;
}
size_t cmSystemTools::CalculateCommandLineLengthLimit()
{
size_t sz =
#ifdef _WIN32
// There's a maximum of 65536 bytes and thus 32768 WCHARs on Windows
// However, cmd.exe itself can only handle 8191 WCHARs and Ninja for
// example uses it to spawn processes.
size_t(8191);
#elif defined(__linux)
// MAX_ARG_STRLEN is the maximum length of a string permissible for
// the execve() syscall on Linux. It's defined as (PAGE_SIZE * 32)
// in Linux's binfmts.h
static_cast<size_t>(sysconf(_SC_PAGESIZE) * 32);
#else
size_t(0);
#endif
#if defined(_SC_ARG_MAX)
// ARG_MAX is the maximum size of the command and environment
// that can be passed to the exec functions on UNIX.
// The value in limits.h does not need to be present and may
// depend upon runtime memory constraints, hence sysconf()
// should be used to query it.
long szArgMax = sysconf(_SC_ARG_MAX);
// A return value of -1 signifies an undetermined limit, but
// it does not imply an infinite limit, and thus is ignored.
if (szArgMax != -1) {
// We estimate the size of the environment block to be 1000.
// This isn't accurate at all, but leaves some headroom.
szArgMax = szArgMax < 1000 ? 0 : szArgMax - 1000;
# if defined(_WIN32) || defined(__linux)
sz = std::min(sz, static_cast<size_t>(szArgMax));
# else
sz = static_cast<size_t>(szArgMax);
# endif
}
#endif
return sz;
}
bool cmSystemTools::RunSingleCommand(std::vector<std::string> const& command,
std::string* captureStdOut,
std::string* captureStdErr, int* retVal,
const char* dir, OutputOption outputflag,
cmDuration timeout, Encoding encoding)
{
std::vector<const char*> argv;
argv.reserve(command.size() + 1);
for (std::string const& cmd : command) {
argv.push_back(cmd.c_str());
}
argv.push_back(nullptr);
cmsysProcess* cp = cmsysProcess_New();
cmsysProcess_SetCommand(cp, argv.data());
cmsysProcess_SetWorkingDirectory(cp, dir);
if (cmSystemTools::GetRunCommandHideConsole()) {
cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
}
if (outputflag == OUTPUT_PASSTHROUGH) {
cmsysProcess_SetPipeShared(cp, cmsysProcess_Pipe_STDOUT, 1);
cmsysProcess_SetPipeShared(cp, cmsysProcess_Pipe_STDERR, 1);
captureStdOut = nullptr;
captureStdErr = nullptr;
} else if (outputflag == OUTPUT_MERGE ||
(captureStdErr && captureStdErr == captureStdOut)) {
cmsysProcess_SetOption(cp, cmsysProcess_Option_MergeOutput, 1);
captureStdErr = nullptr;
}
assert(!captureStdErr || captureStdErr != captureStdOut);
cmsysProcess_SetTimeout(cp, timeout.count());
cmsysProcess_Execute(cp);
std::vector<char> tempStdOut;
std::vector<char> tempStdErr;
char* data;
int length;
int pipe;
cmProcessOutput processOutput(encoding);
std::string strdata;
if (outputflag != OUTPUT_PASSTHROUGH &&
(captureStdOut || captureStdErr || outputflag != OUTPUT_NONE)) {
while ((pipe = cmsysProcess_WaitForData(cp, &data, &length, nullptr)) >
0) {
// Translate NULL characters in the output into valid text.
for (int i = 0; i < length; ++i) {
if (data[i] == '\0') {
data[i] = ' ';
}
}
if (pipe == cmsysProcess_Pipe_STDOUT) {
if (outputflag != OUTPUT_NONE) {
processOutput.DecodeText(data, length, strdata, 1);
cmSystemTools::Stdout(strdata);
}
if (captureStdOut) {
cmAppend(tempStdOut, data, data + length);
}
} else if (pipe == cmsysProcess_Pipe_STDERR) {
if (outputflag != OUTPUT_NONE) {
processOutput.DecodeText(data, length, strdata, 2);
cmSystemTools::Stderr(strdata);
}
if (captureStdErr) {
cmAppend(tempStdErr, data, data + length);
}
}
}
if (outputflag != OUTPUT_NONE) {
processOutput.DecodeText(std::string(), strdata, 1);
if (!strdata.empty()) {
cmSystemTools::Stdout(strdata);
}
processOutput.DecodeText(std::string(), strdata, 2);
if (!strdata.empty()) {
cmSystemTools::Stderr(strdata);
}
}
}
cmsysProcess_WaitForExit(cp, nullptr);
if (captureStdOut) {
captureStdOut->assign(tempStdOut.begin(), tempStdOut.end());
processOutput.DecodeText(*captureStdOut, *captureStdOut);
}
if (captureStdErr) {
captureStdErr->assign(tempStdErr.begin(), tempStdErr.end());
processOutput.DecodeText(*captureStdErr, *captureStdErr);
}
bool result = true;
if (cmsysProcess_GetState(cp) == cmsysProcess_State_Exited) {
if (retVal) {
*retVal = cmsysProcess_GetExitValue(cp);
} else {
if (cmsysProcess_GetExitValue(cp) != 0) {
result = false;
}
}
} else if (cmsysProcess_GetState(cp) == cmsysProcess_State_Exception) {
const char* exception_str = cmsysProcess_GetExceptionString(cp);
if (outputflag != OUTPUT_NONE) {
std::cerr << exception_str << std::endl;
}
if (captureStdErr) {
captureStdErr->append(exception_str, strlen(exception_str));
} else if (captureStdOut) {
captureStdOut->append(exception_str, strlen(exception_str));
}
result = false;
} else if (cmsysProcess_GetState(cp) == cmsysProcess_State_Error) {
const char* error_str = cmsysProcess_GetErrorString(cp);
if (outputflag != OUTPUT_NONE) {
std::cerr << error_str << std::endl;
}
if (captureStdErr) {
captureStdErr->append(error_str, strlen(error_str));
} else if (captureStdOut) {
captureStdOut->append(error_str, strlen(error_str));
}
result = false;
} else if (cmsysProcess_GetState(cp) == cmsysProcess_State_Expired) {
const char* error_str = "Process terminated due to timeout\n";
if (outputflag != OUTPUT_NONE) {
std::cerr << error_str << std::endl;
}
if (captureStdErr) {
captureStdErr->append(error_str, strlen(error_str));
}
result = false;
}
cmsysProcess_Delete(cp);
return result;
}
bool cmSystemTools::RunSingleCommand(const std::string& command,
std::string* captureStdOut,
std::string* captureStdErr, int* retVal,
const char* dir, OutputOption outputflag,
cmDuration timeout)
{
if (s_DisableRunCommandOutput) {
outputflag = OUTPUT_NONE;
}
std::vector<std::string> args = cmSystemTools::ParseArguments(command);
if (args.empty()) {
return false;
}
return cmSystemTools::RunSingleCommand(args, captureStdOut, captureStdErr,
retVal, dir, outputflag, timeout);
}
std::string cmSystemTools::PrintSingleCommand(
std::vector<std::string> const& command)
{
if (command.empty()) {
return std::string();
}
return cmWrap('"', command, '"', " ");
}
bool cmSystemTools::DoesFileExistWithExtensions(
const std::string& name, const std::vector<std::string>& headerExts)
{
std::string hname;
for (std::string const& headerExt : headerExts) {
hname = cmStrCat(name, '.', headerExt);
if (cmSystemTools::FileExists(hname)) {
return true;
}
}
return false;
}
std::string cmSystemTools::FileExistsInParentDirectories(
const std::string& fname, const std::string& directory,
const std::string& toplevel)
{
std::string file = fname;
cmSystemTools::ConvertToUnixSlashes(file);
std::string dir = directory;
cmSystemTools::ConvertToUnixSlashes(dir);
std::string prevDir;
while (dir != prevDir) {
std::string path = cmStrCat(dir, "/", file);
if (cmSystemTools::FileExists(path)) {
return path;
}
if (dir.size() < toplevel.size()) {
break;
}
prevDir = dir;
dir = cmSystemTools::GetParentDirectory(dir);
}
return "";
}
#ifdef _WIN32
cmSystemTools::WindowsFileRetry cmSystemTools::GetWindowsFileRetry()
{
static WindowsFileRetry retry = { 0, 0 };
if (!retry.Count) {
unsigned int data[2] = { 0, 0 };
HKEY const keys[2] = { HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE };
wchar_t const* const values[2] = { L"FilesystemRetryCount",
L"FilesystemRetryDelay" };
for (int k = 0; k < 2; ++k) {
HKEY hKey;
if (RegOpenKeyExW(keys[k], L"Software\\Kitware\\CMake\\Config", 0,
KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
for (int v = 0; v < 2; ++v) {
DWORD dwData, dwType, dwSize = 4;
if (!data[v] &&
RegQueryValueExW(hKey, values[v], 0, &dwType, (BYTE*)&dwData,
&dwSize) == ERROR_SUCCESS &&
dwType == REG_DWORD && dwSize == 4) {
data[v] = static_cast<unsigned int>(dwData);
}
}
RegCloseKey(hKey);
}
}
retry.Count = data[0] ? data[0] : 5;
retry.Delay = data[1] ? data[1] : 500;
}
return retry;
}
#endif
std::string cmSystemTools::GetRealPathResolvingWindowsSubst(
const std::string& path, std::string* errorMessage)
{
#ifdef _WIN32
// uv_fs_realpath uses Windows Vista API so fallback to kwsys if not found
std::string resolved_path;
uv_fs_t req;
int err = uv_fs_realpath(NULL, &req, path.c_str(), NULL);
if (!err) {
resolved_path = std::string((char*)req.ptr);
cmSystemTools::ConvertToUnixSlashes(resolved_path);
// Normalize to upper-case drive letter as GetActualCaseForPath does.
if (resolved_path.size() > 1 && resolved_path[1] == ':') {
resolved_path[0] = toupper(resolved_path[0]);
}
} else if (err == UV_ENOSYS) {
resolved_path = cmsys::SystemTools::GetRealPath(path, errorMessage);
} else if (errorMessage) {
LPSTR message = NULL;
DWORD size = FormatMessageA(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&message, 0,
NULL);
*errorMessage = std::string(message, size);
LocalFree(message);
resolved_path = "";
} else {
resolved_path = path;
}
return resolved_path;
#else
return cmsys::SystemTools::GetRealPath(path, errorMessage);
#endif
}
void cmSystemTools::InitializeLibUV()
{
#if defined(_WIN32)
// Perform libuv one-time initialization now, and then un-do its
// global _fmode setting so that using libuv does not change the
// default file text/binary mode. See libuv issue 840.
uv_loop_close(uv_default_loop());
# ifdef _MSC_VER
_set_fmode(_O_TEXT);
# else
_fmode = _O_TEXT;
# endif
// Replace libuv's report handler with our own to suppress popups.
cmSystemTools::EnableMSVCDebugHook();
#endif
}
bool cmSystemTools::RenameFile(const std::string& oldname,
const std::string& newname)
{
#ifdef _WIN32
# ifndef INVALID_FILE_ATTRIBUTES
# define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
# endif
/* Windows MoveFileEx may not replace read-only or in-use files. If it
fails then remove the read-only attribute from any existing destination.
Try multiple times since we may be racing against another process
creating/opening the destination file just before our MoveFileEx. */
WindowsFileRetry retry = cmSystemTools::GetWindowsFileRetry();
while (
!MoveFileExW(SystemTools::ConvertToWindowsExtendedPath(oldname).c_str(),
SystemTools::ConvertToWindowsExtendedPath(newname).c_str(),
MOVEFILE_REPLACE_EXISTING) &&
--retry.Count) {
DWORD last_error = GetLastError();
// Try again only if failure was due to access/sharing permissions.
if (last_error != ERROR_ACCESS_DENIED &&
last_error != ERROR_SHARING_VIOLATION) {
return false;
}
DWORD attrs = GetFileAttributesW(
SystemTools::ConvertToWindowsExtendedPath(newname).c_str());
if ((attrs != INVALID_FILE_ATTRIBUTES) &&
(attrs & FILE_ATTRIBUTE_READONLY)) {
// Remove the read-only attribute from the destination file.
SetFileAttributesW(
SystemTools::ConvertToWindowsExtendedPath(newname).c_str(),
attrs & ~FILE_ATTRIBUTE_READONLY);
} else {
// The file may be temporarily in use so wait a bit.
cmSystemTools::Delay(retry.Delay);
}
}
return retry.Count > 0;
#else
/* On UNIX we have an OS-provided call to do this atomically. */
return rename(oldname.c_str(), newname.c_str()) == 0;
#endif
}
void cmSystemTools::MoveFileIfDifferent(const std::string& source,
const std::string& destination)
{
if (FilesDiffer(source, destination)) {
if (RenameFile(source, destination)) {
return;
}
CopyFileAlways(source, destination);
}
RemoveFile(source);
}
std::string cmSystemTools::ComputeFileHash(const std::string& source,
cmCryptoHash::Algo algo)
{
#if !defined(CMAKE_BOOTSTRAP)
cmCryptoHash hash(algo);
return hash.HashFile(source);
#else
(void)source;
cmSystemTools::Message("hashsum not supported in bootstrapping mode",
"Error");
return std::string();
#endif
}
std::string cmSystemTools::ComputeStringMD5(const std::string& input)
{
#if !defined(CMAKE_BOOTSTRAP)
cmCryptoHash md5(cmCryptoHash::AlgoMD5);
return md5.HashString(input);
#else
(void)input;
cmSystemTools::Message("md5sum not supported in bootstrapping mode",
"Error");
return "";
#endif
}
std::string cmSystemTools::ComputeCertificateThumbprint(
const std::string& source)
{
std::string thumbprint;
#if !defined(CMAKE_BOOTSTRAP) && defined(_WIN32)
BYTE* certData = NULL;
CRYPT_INTEGER_BLOB cryptBlob;
HCERTSTORE certStore = NULL;
PCCERT_CONTEXT certContext = NULL;
HANDLE certFile = CreateFileW(
cmsys::Encoding::ToWide(source.c_str()).c_str(), GENERIC_READ,
FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (certFile != INVALID_HANDLE_VALUE && certFile != NULL) {
DWORD fileSize = GetFileSize(certFile, NULL);
if (fileSize != INVALID_FILE_SIZE) {
certData = new BYTE[fileSize];
if (certData != NULL) {
DWORD dwRead = 0;
if (ReadFile(certFile, certData, fileSize, &dwRead, NULL)) {
cryptBlob.cbData = fileSize;
cryptBlob.pbData = certData;
// Verify that this is a valid cert
if (PFXIsPFXBlob(&cryptBlob)) {
// Open the certificate as a store
certStore = PFXImportCertStore(&cryptBlob, NULL, CRYPT_EXPORTABLE);
if (certStore != NULL) {
// There should only be 1 cert.
certContext =
CertEnumCertificatesInStore(certStore, certContext);
if (certContext != NULL) {
// The hash is 20 bytes
BYTE hashData[20];
DWORD hashLength = 20;
// Buffer to print the hash. Each byte takes 2 chars +
// terminating character
char hashPrint[41];
char* pHashPrint = hashPrint;
// Get the hash property from the certificate
if (CertGetCertificateContextProperty(
certContext, CERT_HASH_PROP_ID, hashData, &hashLength)) {
for (DWORD i = 0; i < hashLength; i++) {
// Convert each byte to hexadecimal
sprintf(pHashPrint, "%02X", hashData[i]);
pHashPrint += 2;
}
*pHashPrint = '\0';
thumbprint = hashPrint;
}
CertFreeCertificateContext(certContext);
}
CertCloseStore(certStore, 0);
}
}
}
delete[] certData;
}
}
CloseHandle(certFile);
}
#else
(void)source;
cmSystemTools::Message("ComputeCertificateThumbprint is not implemented",
"Error");
#endif
return thumbprint;
}
void cmSystemTools::Glob(const std::string& directory,
const std::string& regexp,
std::vector<std::string>& files)
{
cmsys::Directory d;
cmsys::RegularExpression reg(regexp.c_str());
if (d.Load(directory)) {
size_t numf;
unsigned int i;
numf = d.GetNumberOfFiles();
for (i = 0; i < numf; i++) {
std::string fname = d.GetFile(i);
if (reg.find(fname)) {
files.push_back(std::move(fname));
}
}
}
}
void cmSystemTools::GlobDirs(const std::string& path,
std::vector<std::string>& files)
{
std::string::size_type pos = path.find("/*");
if (pos == std::string::npos) {
files.push_back(path);
return;
}
std::string startPath = path.substr(0, pos);
std::string finishPath = path.substr(pos + 2);
cmsys::Directory d;
if (d.Load(startPath)) {
for (unsigned int i = 0; i < d.GetNumberOfFiles(); ++i) {
if ((std::string(d.GetFile(i)) != ".") &&
(std::string(d.GetFile(i)) != "..")) {
std::string fname = cmStrCat(startPath, '/', d.GetFile(i));
if (cmSystemTools::FileIsDirectory(fname)) {
fname += finishPath;
cmSystemTools::GlobDirs(fname, files);
}
}
}
}
}
bool cmSystemTools::SimpleGlob(const std::string& glob,
std::vector<std::string>& files,
int type /* = 0 */)
{
files.clear();
if (glob.back() != '*') {
return false;
}
std::string path = cmSystemTools::GetFilenamePath(glob);
std::string ppath = cmSystemTools::GetFilenameName(glob);
ppath = ppath.substr(0, ppath.size() - 1);
if (path.empty()) {
path = "/";
}
bool res = false;
cmsys::Directory d;
if (d.Load(path)) {
for (unsigned int i = 0; i < d.GetNumberOfFiles(); ++i) {
if ((std::string(d.GetFile(i)) != ".") &&
(std::string(d.GetFile(i)) != "..")) {
std::string fname = path;
if (path.back() != '/') {
fname += "/";
}
fname += d.GetFile(i);
std::string sfname = d.GetFile(i);
if (type > 0 && cmSystemTools::FileIsDirectory(fname)) {
continue;
}
if (type < 0 && !cmSystemTools::FileIsDirectory(fname)) {
continue;
}
if (sfname.size() >= ppath.size() &&
sfname.substr(0, ppath.size()) == ppath) {
files.push_back(fname);
res = true;
}
}
}
}
return res;
}
std::string cmSystemTools::ConvertToOutputPath(std::string const& path)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
if (s_ForceUnixPaths) {
return cmSystemTools::ConvertToUnixOutputPath(path);
}
return cmSystemTools::ConvertToWindowsOutputPath(path);
#else
return cmSystemTools::ConvertToUnixOutputPath(path);
#endif
}
void cmSystemTools::ConvertToOutputSlashes(std::string& path)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
if (!s_ForceUnixPaths) {
// Convert to windows slashes.
std::string::size_type pos = 0;
while ((pos = path.find('/', pos)) != std::string::npos) {
path[pos++] = '\\';
}
}
#else
static_cast<void>(path);
#endif
}
std::string cmSystemTools::ConvertToRunCommandPath(const std::string& path)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
return cmSystemTools::ConvertToWindowsOutputPath(path);
#else
return cmSystemTools::ConvertToUnixOutputPath(path);
#endif
}
// compute the relative path from here to there
std::string cmSystemTools::RelativePath(std::string const& local,
std::string const& remote)
{
if (!cmSystemTools::FileIsFullPath(local)) {
cmSystemTools::Error("RelativePath must be passed a full path to local: " +
local);
}
if (!cmSystemTools::FileIsFullPath(remote)) {
cmSystemTools::Error(
"RelativePath must be passed a full path to remote: " + remote);
}
return cmsys::SystemTools::RelativePath(local, remote);
}
std::string cmSystemTools::ForceToRelativePath(std::string const& local_path,
std::string const& remote_path)
{
// The paths should never be quoted.
assert(local_path.front() != '\"');
assert(remote_path.front() != '\"');
// The local path should never have a trailing slash except if it is just the
// bare root directory
assert(local_path.empty() || local_path.back() != '/' ||
local_path.size() == 1 ||
(local_path.size() == 3 && local_path[1] == ':' &&
((local_path[0] >= 'A' && local_path[0] <= 'Z') ||
(local_path[0] >= 'a' && local_path[0] <= 'z'))));
// If the path is already relative then just return the path.
if (!cmSystemTools::FileIsFullPath(remote_path)) {
return remote_path;
}
// Identify the longest shared path component between the remote
// path and the local path.
std::vector<std::string> local;
cmSystemTools::SplitPath(local_path, local);
std::vector<std::string> remote;
cmSystemTools::SplitPath(remote_path, remote);
unsigned int common = 0;
while (common < remote.size() && common < local.size() &&
cmSystemTools::ComparePath(remote[common], local[common])) {
++common;
}
// If no part of the path is in common then return the full path.
if (common == 0) {
return remote_path;
}
// If the entire path is in common then just return a ".".
if (common == remote.size() && common == local.size()) {
return ".";
}
// If the entire path is in common except for a trailing slash then
// just return a "./".
if (common + 1 == remote.size() && remote[common].empty() &&
common == local.size()) {
return "./";
}
// Construct the relative path.
std::string relative;
// First add enough ../ to get up to the level of the shared portion
// of the path. Leave off the trailing slash. Note that the last
// component of local will never be empty because local should never
// have a trailing slash.
for (unsigned int i = common; i < local.size(); ++i) {
relative += "..";
if (i < local.size() - 1) {
relative += "/";
}
}
// Now add the portion of the destination path that is not included
// in the shared portion of the path. Add a slash the first time
// only if there was already something in the path. If there was a
// trailing slash in the input then the last iteration of the loop
// will add a slash followed by an empty string which will preserve
// the trailing slash in the output.
if (!relative.empty() && !remote.empty()) {
relative += "/";
}
relative += cmJoin(cmMakeRange(remote).advance(common), "/");
// Finally return the path.
return relative;
}
#ifndef CMAKE_BOOTSTRAP
bool cmSystemTools::UnsetEnv(const char* value)
{
# if !defined(HAVE_UNSETENV)
std::string var = cmStrCat(value, '=');
return cmSystemTools::PutEnv(var.c_str());
# else
unsetenv(value);
return true;
# endif
}
std::vector<std::string> cmSystemTools::GetEnvironmentVariables()
{
std::vector<std::string> env;
int cc;
for (cc = 0; environ[cc]; ++cc) {
env.emplace_back(environ[cc]);
}
return env;
}
void cmSystemTools::AppendEnv(std::vector<std::string> const& env)
{
for (std::string const& eit : env) {
cmSystemTools::PutEnv(eit);
}
}
cmSystemTools::SaveRestoreEnvironment::SaveRestoreEnvironment()
{
this->Env = cmSystemTools::GetEnvironmentVariables();
}
cmSystemTools::SaveRestoreEnvironment::~SaveRestoreEnvironment()
{
// First clear everything in the current environment:
std::vector<std::string> currentEnv = GetEnvironmentVariables();
for (std::string var : currentEnv) {
std::string::size_type pos = var.find('=');
if (pos != std::string::npos) {
var = var.substr(0, pos);
}
cmSystemTools::UnsetEnv(var.c_str());
}
// Then put back each entry from the original environment:
cmSystemTools::AppendEnv(this->Env);
}
#endif
void cmSystemTools::EnableVSConsoleOutput()
{
#ifdef _WIN32
// Visual Studio tools like devenv may not
// display output to the console unless this environment variable is
// set. We need it to capture the output of these build tools.
// Note for future work that one could pass "/out \\.\pipe\NAME" to
// either of these executables where NAME is created with
// CreateNamedPipe. This would bypass the internal buffering of the
// output and allow it to be captured on the fly.
cmSystemTools::PutEnv("vsconsoleoutput=1");
# ifndef CMAKE_BOOTSTRAP
// VS sets an environment variable to tell MS tools like "cl" to report
// output through a backdoor pipe instead of stdout/stderr. Unset the
// environment variable to close this backdoor for any path of process
// invocations that passes through CMake so we can capture the output.
cmSystemTools::UnsetEnv("VS_UNICODE_OUTPUT");
# endif
#endif
}
bool cmSystemTools::IsPathToFramework(const std::string& path)
{
return (cmSystemTools::FileIsFullPath(path) &&
cmHasLiteralSuffix(path, ".framework"));
}
bool cmSystemTools::CreateTar(const std::string& outFileName,
const std::vector<std::string>& files,
cmTarCompression compressType, bool verbose,
std::string const& mtime,
std::string const& format)
{
#if !defined(CMAKE_BOOTSTRAP)
std::string cwd = cmSystemTools::GetCurrentWorkingDirectory();
cmsys::ofstream fout(outFileName.c_str(), std::ios::out | std::ios::binary);
if (!fout) {
std::string e = cmStrCat("Cannot open output file \"", outFileName,
"\": ", cmSystemTools::GetLastSystemError());
cmSystemTools::Error(e);
return false;
}
cmArchiveWrite::Compress compress = cmArchiveWrite::CompressNone;
switch (compressType) {
case TarCompressGZip:
compress = cmArchiveWrite::CompressGZip;
break;
case TarCompressBZip2:
compress = cmArchiveWrite::CompressBZip2;
break;
case TarCompressXZ:
compress = cmArchiveWrite::CompressXZ;
break;
case TarCompressZstd:
compress = cmArchiveWrite::CompressZstd;
break;
case TarCompressNone:
compress = cmArchiveWrite::CompressNone;
break;
}
cmArchiveWrite a(fout, compress, format.empty() ? "paxr" : format);
a.SetMTime(mtime);
a.SetVerbose(verbose);
bool tarCreatedSuccessfully = true;
for (auto path : files) {
if (cmSystemTools::FileIsFullPath(path)) {
// Get the relative path to the file.
path = cmSystemTools::RelativePath(cwd, path);
}
if (!a.Add(path)) {
cmSystemTools::Error(a.GetError());
tarCreatedSuccessfully = false;
}
}
return tarCreatedSuccessfully;
#else
(void)outFileName;
(void)files;
(void)verbose;
return false;
#endif
}
#if !defined(CMAKE_BOOTSTRAP)
namespace {
# define BSDTAR_FILESIZE_PRINTF "%lu"
# define BSDTAR_FILESIZE_TYPE unsigned long
void list_item_verbose(FILE* out, struct archive_entry* entry)
{
char tmp[100];
size_t w;
const char* p;
const char* fmt;
time_t tim;
static time_t now;
size_t u_width = 6;
size_t gs_width = 13;
/*
* We avoid collecting the entire list in memory at once by
* listing things as we see them. However, that also means we can't
* just pre-compute the field widths. Instead, we start with guesses
* and just widen them as necessary. These numbers are completely
* arbitrary.
*/
if (!now) {
time(&now);
}
fprintf(out, "%s %d ", archive_entry_strmode(entry),
archive_entry_nlink(entry));
/* Use uname if it's present, else uid. */
p = archive_entry_uname(entry);
if ((p == nullptr) || (*p == '\0')) {
sprintf(tmp, "%lu ", static_cast<unsigned long>(archive_entry_uid(entry)));
p = tmp;
}
w = strlen(p);
if (w > u_width) {
u_width = w;
}
fprintf(out, "%-*s ", static_cast<int>(u_width), p);
/* Use gname if it's present, else gid. */
p = archive_entry_gname(entry);
if (p != nullptr && p[0] != '\0') {
fprintf(out, "%s", p);
w = strlen(p);
} else {
sprintf(tmp, "%lu", static_cast<unsigned long>(archive_entry_gid(entry)));
w = strlen(tmp);
fprintf(out, "%s", tmp);
}
/*
* Print device number or file size, right-aligned so as to make
* total width of group and devnum/filesize fields be gs_width.
* If gs_width is too small, grow it.
*/
if (archive_entry_filetype(entry) == AE_IFCHR ||
archive_entry_filetype(entry) == AE_IFBLK) {
unsigned long rdevmajor = archive_entry_rdevmajor(entry);
unsigned long rdevminor = archive_entry_rdevminor(entry);
sprintf(tmp, "%lu,%lu", rdevmajor, rdevminor);
} else {
/*
* Note the use of platform-dependent macros to format
* the filesize here. We need the format string and the
* corresponding type for the cast.
*/
sprintf(tmp, BSDTAR_FILESIZE_PRINTF,
static_cast<BSDTAR_FILESIZE_TYPE>(archive_entry_size(entry)));
}
if (w + strlen(tmp) >= gs_width) {
gs_width = w + strlen(tmp) + 1;
}
fprintf(out, "%*s", static_cast<int>(gs_width - w), tmp);
/* Format the time using 'ls -l' conventions. */
tim = archive_entry_mtime(entry);
# define HALF_YEAR ((time_t)365 * 86400 / 2)
# if defined(_WIN32) && !defined(__CYGWIN__)
/* Windows' strftime function does not support %e format. */
# define DAY_FMT "%d"
# else
# define DAY_FMT "%e" /* Day number without leading zeros */
# endif
if (tim < now - HALF_YEAR || tim > now + HALF_YEAR) {
fmt = DAY_FMT " %b %Y";
} else {
fmt = DAY_FMT " %b %H:%M";
}
strftime(tmp, sizeof(tmp), fmt, localtime(&tim));
fprintf(out, " %s ", tmp);
fprintf(out, "%s", cm_archive_entry_pathname(entry).c_str());
/* Extra information for links. */
if (archive_entry_hardlink(entry)) /* Hard link */
{
fprintf(out, " link to %s", archive_entry_hardlink(entry));
} else if (archive_entry_symlink(entry)) /* Symbolic link */
{
fprintf(out, " -> %s", archive_entry_symlink(entry));
}
fflush(out);
}
void ArchiveError(const char* m1, struct archive* a)
{
std::string message(m1);
const char* m2 = archive_error_string(a);
if (m2) {
message += m2;
}
cmSystemTools::Error(message);
}
bool la_diagnostic(struct archive* ar, __LA_SSIZE_T r)
{
// See archive.h definition of ARCHIVE_OK for return values.
if (r >= ARCHIVE_OK) {
return true;
}
if (r >= ARCHIVE_WARN) {
const char* warn = archive_error_string(ar);
if (!warn) {
warn = "unknown warning";
}
std::cerr << "cmake -E tar: warning: " << warn << '\n';
return true;
}
// Error.
const char* err = archive_error_string(ar);
if (!err) {
err = "unknown error";
}
std::cerr << "cmake -E tar: error: " << err << '\n';
return false;
}
// Return 'true' on success
bool copy_data(struct archive* ar, struct archive* aw)
{
long r;
const void* buff;
size_t size;
# if defined(ARCHIVE_VERSION_NUMBER) && ARCHIVE_VERSION_NUMBER >= 3000000
__LA_INT64_T offset;
# else
off_t offset;
# endif
for (;;) {
// See archive.h definition of ARCHIVE_OK for return values.
r = archive_read_data_block(ar, &buff, &size, &offset);
if (r == ARCHIVE_EOF) {
return true;
}
if (!la_diagnostic(ar, r)) {
return false;
}
// See archive.h definition of ARCHIVE_OK for return values.
__LA_SSIZE_T const w = archive_write_data_block(aw, buff, size, offset);
if (!la_diagnostic(ar, w)) {
return false;
}
}
# if !defined(__clang__) && !defined(__HP_aCC)
return false; /* this should not happen but it quiets some compilers */
# endif
}
bool extract_tar(const std::string& outFileName,
const std::vector<std::string>& files, bool verbose,
bool extract)
{
cmLocaleRAII localeRAII;
static_cast<void>(localeRAII);
struct archive* a = archive_read_new();
struct archive* ext = archive_write_disk_new();
archive_read_support_filter_all(a);
archive_read_support_format_all(a);
struct archive_entry* entry;
struct archive* matching = archive_match_new();
if (matching == nullptr) {
cmSystemTools::Error("Out of memory");
return false;
}
for (const auto& filename : files) {
if (archive_match_include_pattern(matching, filename.c_str()) !=
ARCHIVE_OK) {
cmSystemTools::Error("Failed to add to inclusion list: " + filename);
return false;
}
}
int r = cm_archive_read_open_file(a, outFileName.c_str(), 10240);
if (r) {
ArchiveError("Problem with archive_read_open_file(): ", a);
archive_write_free(ext);
archive_read_close(a);
return false;
}
for (;;) {
r = archive_read_next_header(a, &entry);
if (r == ARCHIVE_EOF) {
break;
}
if (r != ARCHIVE_OK) {
ArchiveError("Problem with archive_read_next_header(): ", a);
break;
}
if (archive_match_excluded(matching, entry)) {
continue;
}
if (verbose) {
if (extract) {
cmSystemTools::Stdout("x ");
cmSystemTools::Stdout(cm_archive_entry_pathname(entry));
} else {
list_item_verbose(stdout, entry);
}
cmSystemTools::Stdout("\n");
} else if (!extract) {
cmSystemTools::Stdout(cm_archive_entry_pathname(entry));
cmSystemTools::Stdout("\n");
}
if (extract) {
r = archive_write_disk_set_options(ext, ARCHIVE_EXTRACT_TIME);
if (r != ARCHIVE_OK) {
ArchiveError("Problem with archive_write_disk_set_options(): ", ext);
break;
}
r = archive_write_header(ext, entry);
if (r == ARCHIVE_OK) {
if (!copy_data(a, ext)) {
break;
}
r = archive_write_finish_entry(ext);
if (r != ARCHIVE_OK) {
ArchiveError("Problem with archive_write_finish_entry(): ", ext);
break;
}
}
# ifdef _WIN32
else if (const char* linktext = archive_entry_symlink(entry)) {
std::cerr << "cmake -E tar: warning: skipping symbolic link \""
<< cm_archive_entry_pathname(entry) << "\" -> \"" << linktext
<< "\"." << std::endl;
}
# endif
else {
ArchiveError("Problem with archive_write_header(): ", ext);
cmSystemTools::Error("Current file: " +
cm_archive_entry_pathname(entry));
break;
}
}
}
bool error_occured = false;
if (matching != nullptr) {
const char* p;
int ar;
while ((ar = archive_match_path_unmatched_inclusions_next(matching, &p)) ==
ARCHIVE_OK) {
cmSystemTools::Error("tar: " + std::string(p) +
": Not found in archive");
error_occured = true;
}
if (error_occured) {
return false;
}
if (ar == ARCHIVE_FATAL) {
cmSystemTools::Error("tar: Out of memory");
return false;
}
}
archive_match_free(matching);
archive_write_free(ext);
archive_read_close(a);
archive_read_free(a);
return r == ARCHIVE_EOF || r == ARCHIVE_OK;
}
}
#endif
bool cmSystemTools::ExtractTar(const std::string& outFileName,
const std::vector<std::string>& files,
bool verbose)
{
#if !defined(CMAKE_BOOTSTRAP)
return extract_tar(outFileName, files, verbose, true);
#else
(void)outFileName;
(void)files;
(void)verbose;
return false;
#endif
}
bool cmSystemTools::ListTar(const std::string& outFileName,
const std::vector<std::string>& files,
bool verbose)
{
#if !defined(CMAKE_BOOTSTRAP)
return extract_tar(outFileName, files, verbose, false);
#else
(void)outFileName;
(void)files;
(void)verbose;
return false;
#endif
}
int cmSystemTools::WaitForLine(cmsysProcess* process, std::string& line,
cmDuration timeout, std::vector<char>& out,
std::vector<char>& err)
{
line.clear();
auto outiter = out.begin();
auto erriter = err.begin();
cmProcessOutput processOutput;
std::string strdata;
while (true) {
// Check for a newline in stdout.
for (; outiter != out.end(); ++outiter) {
if ((*outiter == '\r') && ((outiter + 1) == out.end())) {
break;
}
if (*outiter == '\n' || *outiter == '\0') {
std::vector<char>::size_type length = outiter - out.begin();
if (length > 1 && *(outiter - 1) == '\r') {
--length;
}
if (length > 0) {
line.append(&out[0], length);
}
out.erase(out.begin(), outiter + 1);
return cmsysProcess_Pipe_STDOUT;
}
}
// Check for a newline in stderr.
for (; erriter != err.end(); ++erriter) {
if ((*erriter == '\r') && ((erriter + 1) == err.end())) {
break;
}
if (*erriter == '\n' || *erriter == '\0') {
std::vector<char>::size_type length = erriter - err.begin();
if (length > 1 && *(erriter - 1) == '\r') {
--length;
}
if (length > 0) {
line.append(&err[0], length);
}
err.erase(err.begin(), erriter + 1);
return cmsysProcess_Pipe_STDERR;
}
}
// No newlines found. Wait for more data from the process.
int length;
char* data;
double timeoutAsDbl = timeout.count();
int pipe =
cmsysProcess_WaitForData(process, &data, &length, &timeoutAsDbl);
if (pipe == cmsysProcess_Pipe_Timeout) {
// Timeout has been exceeded.
return pipe;
}
if (pipe == cmsysProcess_Pipe_STDOUT) {
processOutput.DecodeText(data, length, strdata, 1);
// Append to the stdout buffer.
std::vector<char>::size_type size = out.size();
cmAppend(out, strdata);
outiter = out.begin() + size;
} else if (pipe == cmsysProcess_Pipe_STDERR) {
processOutput.DecodeText(data, length, strdata, 2);
// Append to the stderr buffer.
std::vector<char>::size_type size = err.size();
cmAppend(err, strdata);
erriter = err.begin() + size;
} else if (pipe == cmsysProcess_Pipe_None) {
// Both stdout and stderr pipes have broken. Return leftover data.
processOutput.DecodeText(std::string(), strdata, 1);
if (!strdata.empty()) {
std::vector<char>::size_type size = out.size();
cmAppend(out, strdata);
outiter = out.begin() + size;
}
processOutput.DecodeText(std::string(), strdata, 2);
if (!strdata.empty()) {
std::vector<char>::size_type size = err.size();
cmAppend(err, strdata);
erriter = err.begin() + size;
}
if (!out.empty()) {
line.append(&out[0], outiter - out.begin());
out.erase(out.begin(), out.end());
return cmsysProcess_Pipe_STDOUT;
}
if (!err.empty()) {
line.append(&err[0], erriter - err.begin());
err.erase(err.begin(), err.end());
return cmsysProcess_Pipe_STDERR;
}
return cmsysProcess_Pipe_None;
}
}
}
#ifdef _WIN32
static void EnsureStdPipe(DWORD fd)
{
if (GetStdHandle(fd) != INVALID_HANDLE_VALUE) {
return;
}
SECURITY_ATTRIBUTES sa;
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
HANDLE h = CreateFileW(
L"NUL",
fd == STD_INPUT_HANDLE ? FILE_GENERIC_READ
: FILE_GENERIC_WRITE | FILE_READ_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_WRITE, &sa, OPEN_EXISTING, 0, NULL);
if (h == INVALID_HANDLE_VALUE) {
LPSTR message = NULL;
DWORD size = FormatMessageA(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR)&message, 0, NULL);
std::string msg = std::string(message, size);
LocalFree(message);
std::cerr << "failed to open NUL for missing stdio pipe: " << msg;
abort();
}
SetStdHandle(fd, h);
}
void cmSystemTools::EnsureStdPipes()
{
EnsureStdPipe(STD_INPUT_HANDLE);
EnsureStdPipe(STD_OUTPUT_HANDLE);
EnsureStdPipe(STD_ERROR_HANDLE);
}
#else
static void EnsureStdPipe(int fd)
{
if (fcntl(fd, F_GETFD) != -1 || errno != EBADF) {
return;
}
int f = open("/dev/null", fd == STDIN_FILENO ? O_RDONLY : O_WRONLY);
if (f == -1) {
perror("failed to open /dev/null for missing stdio pipe");
abort();
}
if (f != fd) {
dup2(f, fd);
close(f);
}
}
void cmSystemTools::EnsureStdPipes()
{
EnsureStdPipe(STDIN_FILENO);
EnsureStdPipe(STDOUT_FILENO);
EnsureStdPipe(STDERR_FILENO);
}
#endif
void cmSystemTools::DoNotInheritStdPipes()
{
#ifdef _WIN32
// Check to see if we are attached to a console
// if so, then do not stop the inherited pipes
// or stdout and stderr will not show up in dos
// shell windows
CONSOLE_SCREEN_BUFFER_INFO hOutInfo;
HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
if (GetConsoleScreenBufferInfo(hOut, &hOutInfo)) {
return;
}
{
HANDLE out = GetStdHandle(STD_OUTPUT_HANDLE);
DuplicateHandle(GetCurrentProcess(), out, GetCurrentProcess(), &out, 0,
FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
SetStdHandle(STD_OUTPUT_HANDLE, out);
}
{
HANDLE out = GetStdHandle(STD_ERROR_HANDLE);
DuplicateHandle(GetCurrentProcess(), out, GetCurrentProcess(), &out, 0,
FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
SetStdHandle(STD_ERROR_HANDLE, out);
}
#endif
}
#ifdef _WIN32
# ifndef CRYPT_SILENT
# define CRYPT_SILENT 0x40 /* Not defined by VS 6 version of header. */
# endif
static int WinCryptRandom(void* data, size_t size)
{
int result = 0;
HCRYPTPROV hProvider = 0;
if (CryptAcquireContextW(&hProvider, 0, 0, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
result = CryptGenRandom(hProvider, (DWORD)size, (BYTE*)data) ? 1 : 0;
CryptReleaseContext(hProvider, 0);
}
return result;
}
#endif
unsigned int cmSystemTools::RandomSeed()
{
#if defined(_WIN32) && !defined(__CYGWIN__)
unsigned int seed = 0;
// Try using a real random source.
if (WinCryptRandom(&seed, sizeof(seed))) {
return seed;
}
// Fall back to the time and pid.
FILETIME ft;
GetSystemTimeAsFileTime(&ft);
unsigned int t1 = static_cast<unsigned int>(ft.dwHighDateTime);
unsigned int t2 = static_cast<unsigned int>(ft.dwLowDateTime);
unsigned int pid = static_cast<unsigned int>(GetCurrentProcessId());
return t1 ^ t2 ^ pid;
#else
union
{
unsigned int integer;
char bytes[sizeof(unsigned int)];
} seed;
// Try using a real random source.
cmsys::ifstream fin;
fin.rdbuf()->pubsetbuf(nullptr, 0); // Unbuffered read.
fin.open("/dev/urandom");
if (fin.good() && fin.read(seed.bytes, sizeof(seed)) &&
fin.gcount() == sizeof(seed)) {
return seed.integer;
}
// Fall back to the time and pid.
struct timeval t;
gettimeofday(&t, nullptr);
unsigned int pid = static_cast<unsigned int>(getpid());
unsigned int tv_sec = static_cast<unsigned int>(t.tv_sec);
unsigned int tv_usec = static_cast<unsigned int>(t.tv_usec);
// Since tv_usec never fills more than 11 bits we shift it to fill
// in the slow-changing high-order bits of tv_sec.
return tv_sec ^ (tv_usec << 21) ^ pid;
#endif
}
static std::string cmSystemToolsCMakeCommand;
static std::string cmSystemToolsCTestCommand;
static std::string cmSystemToolsCPackCommand;
static std::string cmSystemToolsCMakeCursesCommand;
static std::string cmSystemToolsCMakeGUICommand;
static std::string cmSystemToolsCMClDepsCommand;
static std::string cmSystemToolsCMakeRoot;
void cmSystemTools::FindCMakeResources(const char* argv0)
{
std::string exe_dir;
#if defined(_WIN32) && !defined(__CYGWIN__)
(void)argv0; // ignore this on windows
wchar_t modulepath[_MAX_PATH];
::GetModuleFileNameW(NULL, modulepath, sizeof(modulepath));
std::string path = cmsys::Encoding::ToNarrow(modulepath);
std::string realPath =
cmSystemTools::GetRealPathResolvingWindowsSubst(path, NULL);
if (realPath.empty()) {
realPath = path;
}
exe_dir = cmSystemTools::GetFilenamePath(realPath);
#elif defined(__APPLE__)
(void)argv0; // ignore this on OS X
# define CM_EXE_PATH_LOCAL_SIZE 16384
char exe_path_local[CM_EXE_PATH_LOCAL_SIZE];
# if defined(MAC_OS_X_VERSION_10_3) && !defined(MAC_OS_X_VERSION_10_4)
unsigned long exe_path_size = CM_EXE_PATH_LOCAL_SIZE;
# else
uint32_t exe_path_size = CM_EXE_PATH_LOCAL_SIZE;
# endif
# undef CM_EXE_PATH_LOCAL_SIZE
char* exe_path = exe_path_local;
if (_NSGetExecutablePath(exe_path, &exe_path_size) < 0) {
exe_path = static_cast<char*>(malloc(exe_path_size));
_NSGetExecutablePath(exe_path, &exe_path_size);
}
exe_dir =
cmSystemTools::GetFilenamePath(cmSystemTools::GetRealPath(exe_path));
if (exe_path != exe_path_local) {
free(exe_path);
}
if (cmSystemTools::GetFilenameName(exe_dir) == "MacOS") {
// The executable is inside an application bundle.
// Look for ..<CMAKE_BIN_DIR> (install tree) and then fall back to
// ../../../bin (build tree).
exe_dir = cmSystemTools::GetFilenamePath(exe_dir);
if (cmSystemTools::FileExists(exe_dir + CMAKE_BIN_DIR "/cmake")) {
exe_dir += CMAKE_BIN_DIR;
} else {
exe_dir = cmSystemTools::GetFilenamePath(exe_dir);
exe_dir = cmSystemTools::GetFilenamePath(exe_dir);
}
}
#else
std::string errorMsg;
std::string exe;
if (cmSystemTools::FindProgramPath(argv0, exe, errorMsg)) {
// remove symlinks
exe = cmSystemTools::GetRealPath(exe);
exe_dir = cmSystemTools::GetFilenamePath(exe);
} else {
// ???
}
#endif
exe_dir = cmSystemTools::GetActualCaseForPath(exe_dir);
cmSystemToolsCMakeCommand =
cmStrCat(exe_dir, "/cmake", cmSystemTools::GetExecutableExtension());
#ifdef CMAKE_BOOTSTRAP
// The bootstrap cmake does not provide the other tools,
// so use the directory where they are about to be built.
exe_dir = CMAKE_BOOTSTRAP_BINARY_DIR "/bin";
#endif
cmSystemToolsCTestCommand =
cmStrCat(exe_dir, "/ctest", cmSystemTools::GetExecutableExtension());
cmSystemToolsCPackCommand =
cmStrCat(exe_dir, "/cpack", cmSystemTools::GetExecutableExtension());
cmSystemToolsCMakeGUICommand =
cmStrCat(exe_dir, "/cmake-gui", cmSystemTools::GetExecutableExtension());
if (!cmSystemTools::FileExists(cmSystemToolsCMakeGUICommand)) {
cmSystemToolsCMakeGUICommand.clear();
}
cmSystemToolsCMakeCursesCommand =
cmStrCat(exe_dir, "/ccmake", cmSystemTools::GetExecutableExtension());
if (!cmSystemTools::FileExists(cmSystemToolsCMakeCursesCommand)) {
cmSystemToolsCMakeCursesCommand.clear();
}
cmSystemToolsCMClDepsCommand =
cmStrCat(exe_dir, "/cmcldeps", cmSystemTools::GetExecutableExtension());
if (!cmSystemTools::FileExists(cmSystemToolsCMClDepsCommand)) {
cmSystemToolsCMClDepsCommand.clear();
}
#ifndef CMAKE_BOOTSTRAP
// Install tree has
// - "<prefix><CMAKE_BIN_DIR>/cmake"
// - "<prefix><CMAKE_DATA_DIR>"
if (cmHasSuffix(exe_dir, CMAKE_BIN_DIR)) {
std::string const prefix =
exe_dir.substr(0, exe_dir.size() - strlen(CMAKE_BIN_DIR));
cmSystemToolsCMakeRoot = prefix + CMAKE_DATA_DIR;
}
if (cmSystemToolsCMakeRoot.empty() ||
!cmSystemTools::FileExists(
(cmSystemToolsCMakeRoot + "/Modules/CMake.cmake"))) {
// Build tree has "<build>/bin[/<config>]/cmake" and
// "<build>/CMakeFiles/CMakeSourceDir.txt".
std::string dir = cmSystemTools::GetFilenamePath(exe_dir);
std::string src_dir_txt = dir + "/CMakeFiles/CMakeSourceDir.txt";
cmsys::ifstream fin(src_dir_txt.c_str());
std::string src_dir;
if (fin && cmSystemTools::GetLineFromStream(fin, src_dir) &&
cmSystemTools::FileIsDirectory(src_dir)) {
cmSystemToolsCMakeRoot = src_dir;
} else {
dir = cmSystemTools::GetFilenamePath(dir);
src_dir_txt = dir + "/CMakeFiles/CMakeSourceDir.txt";
cmsys::ifstream fin2(src_dir_txt.c_str());
if (fin2 && cmSystemTools::GetLineFromStream(fin2, src_dir) &&
cmSystemTools::FileIsDirectory(src_dir)) {
cmSystemToolsCMakeRoot = src_dir;
}
}
}
#else
// Bootstrap build knows its source.
cmSystemToolsCMakeRoot = CMAKE_BOOTSTRAP_SOURCE_DIR;
#endif
}
std::string const& cmSystemTools::GetCMakeCommand()
{
return cmSystemToolsCMakeCommand;
}
std::string const& cmSystemTools::GetCTestCommand()
{
return cmSystemToolsCTestCommand;
}
std::string const& cmSystemTools::GetCPackCommand()
{
return cmSystemToolsCPackCommand;
}
std::string const& cmSystemTools::GetCMakeCursesCommand()
{
return cmSystemToolsCMakeCursesCommand;
}
std::string const& cmSystemTools::GetCMakeGUICommand()
{
return cmSystemToolsCMakeGUICommand;
}
std::string const& cmSystemTools::GetCMClDepsCommand()
{
return cmSystemToolsCMClDepsCommand;
}
std::string const& cmSystemTools::GetCMakeRoot()
{
return cmSystemToolsCMakeRoot;
}
void cmSystemTools::MakefileColorEcho(int color, const char* message,
bool newline, bool enabled)
{
// On some platforms (an MSYS prompt) cmsysTerminal may not be able
// to determine whether the stream is displayed on a tty. In this
// case it assumes no unless we tell it otherwise. Since we want
// color messages to be displayed for users we will assume yes.
// However, we can test for some situations when the answer is most
// likely no.
int assumeTTY = cmsysTerminal_Color_AssumeTTY;
if (cmSystemTools::HasEnv("DART_TEST_FROM_DART") ||
cmSystemTools::HasEnv("DASHBOARD_TEST_FROM_CTEST") ||
cmSystemTools::HasEnv("CTEST_INTERACTIVE_DEBUG_MODE")) {
// Avoid printing color escapes during dashboard builds.
assumeTTY = 0;
}
if (enabled && color != cmsysTerminal_Color_Normal) {
// Print with color. Delay the newline until later so that
// all color restore sequences appear before it.
cmsysTerminal_cfprintf(color | assumeTTY, stdout, "%s", message);
} else {
// Color is disabled. Print without color.
fprintf(stdout, "%s", message);
}
if (newline) {
fprintf(stdout, "\n");
}
}
bool cmSystemTools::GuessLibrarySOName(std::string const& fullPath,
std::string& soname)
{
// For ELF shared libraries use a real parser to get the correct
// soname.
#if defined(CMAKE_USE_ELF_PARSER)
cmELF elf(fullPath.c_str());
if (elf) {
return elf.GetSOName(soname);
}
#endif
// If the file is not a symlink we have no guess for its soname.
if (!cmSystemTools::FileIsSymlink(fullPath)) {
return false;
}
if (!cmSystemTools::ReadSymlink(fullPath, soname)) {
return false;
}
// If the symlink has a path component we have no guess for the soname.
if (!cmSystemTools::GetFilenamePath(soname).empty()) {
return false;
}
// If the symlink points at an extended version of the same name
// assume it is the soname.
std::string name = cmSystemTools::GetFilenameName(fullPath);
return soname.length() > name.length() &&
soname.compare(0, name.length(), name) == 0;
}
bool cmSystemTools::GuessLibraryInstallName(std::string const& fullPath,
std::string& soname)
{
#if defined(CMAKE_USE_MACH_PARSER)
cmMachO macho(fullPath.c_str());
if (macho) {
return macho.GetInstallName(soname);
}
#else
(void)fullPath;
(void)soname;
#endif
return false;
}
#if defined(CMAKE_USE_ELF_PARSER)
std::string::size_type cmSystemToolsFindRPath(std::string const& have,
std::string const& want)
{
std::string::size_type pos = 0;
while (pos < have.size()) {
// Look for an occurrence of the string.
std::string::size_type const beg = have.find(want, pos);
if (beg == std::string::npos) {
return std::string::npos;
}
// Make sure it is separated from preceding entries.
if (beg > 0 && have[beg - 1] != ':') {
pos = beg + 1;
continue;
}
// Make sure it is separated from following entries.
std::string::size_type const end = beg + want.size();
if (end < have.size() && have[end] != ':') {
pos = beg + 1;
continue;
}
// Return the position of the path portion.
return beg;
}
// The desired rpath was not found.
return std::string::npos;
}
#endif
#if defined(CMAKE_USE_ELF_PARSER)
struct cmSystemToolsRPathInfo
{
unsigned long Position;
unsigned long Size;
std::string Name;
std::string Value;
};
#endif
#if defined(CMAKE_USE_ELF_PARSER)
bool cmSystemTools::ChangeRPath(std::string const& file,
std::string const& oldRPath,
std::string const& newRPath,
bool removeEnvironmentRPath, std::string* emsg,
bool* changed)
{
if (changed) {
*changed = false;
}
int rp_count = 0;
bool remove_rpath = true;
cmSystemToolsRPathInfo rp[2];
{
// Parse the ELF binary.
cmELF elf(file.c_str());
// Get the RPATH and RUNPATH entries from it.
int se_count = 0;
cmELF::StringEntry const* se[2] = { nullptr, nullptr };
const char* se_name[2] = { nullptr, nullptr };
if (cmELF::StringEntry const* se_rpath = elf.GetRPath()) {
se[se_count] = se_rpath;
se_name[se_count] = "RPATH";
++se_count;
}
if (cmELF::StringEntry const* se_runpath = elf.GetRunPath()) {
se[se_count] = se_runpath;
se_name[se_count] = "RUNPATH";
++se_count;
}
if (se_count == 0) {
if (newRPath.empty()) {
// The new rpath is empty and there is no rpath anyway so it is
// okay.
return true;
}
if (emsg) {
*emsg =
cmStrCat("No valid ELF RPATH or RUNPATH entry exists in the file; ",
elf.GetErrorMessage());
}
return false;
}
for (int i = 0; i < se_count; ++i) {
// If both RPATH and RUNPATH refer to the same string literal it
// needs to be changed only once.
if (rp_count && rp[0].Position == se[i]->Position) {
continue;
}
// Make sure the current rpath contains the old rpath.
std::string::size_type pos =
cmSystemToolsFindRPath(se[i]->Value, oldRPath);
if (pos == std::string::npos) {
// If it contains the new rpath instead then it is okay.
if (cmSystemToolsFindRPath(se[i]->Value, newRPath) !=
std::string::npos) {
remove_rpath = false;
continue;
}
if (emsg) {
std::ostringstream e;
/* clang-format off */
e << "The current " << se_name[i] << " is:\n"
<< " " << se[i]->Value << "\n"
<< "which does not contain:\n"
<< " " << oldRPath << "\n"
<< "as was expected.";
/* clang-format on */
*emsg = e.str();
}
return false;
}
// Store information about the entry in the file.
rp[rp_count].Position = se[i]->Position;
rp[rp_count].Size = se[i]->Size;
rp[rp_count].Name = se_name[i];
std::string::size_type prefix_len = pos;
// If oldRPath was at the end of the file's RPath, and newRPath is empty,
// we should remove the unnecessary ':' at the end.
if (newRPath.empty() && pos > 0 && se[i]->Value[pos - 1] == ':' &&
pos + oldRPath.length() == se[i]->Value.length()) {
prefix_len--;
}
// Construct the new value which preserves the part of the path
// not being changed.
if (!removeEnvironmentRPath) {
rp[rp_count].Value = se[i]->Value.substr(0, prefix_len);
}
rp[rp_count].Value += newRPath;
rp[rp_count].Value += se[i]->Value.substr(pos + oldRPath.length());
if (!rp[rp_count].Value.empty()) {
remove_rpath = false;
}
// Make sure there is enough room to store the new rpath and at
// least one null terminator.
if (rp[rp_count].Size < rp[rp_count].Value.length() + 1) {
if (emsg) {
*emsg = cmStrCat("The replacement path is too long for the ",
se_name[i], " entry.");
}
return false;
}
// This entry is ready for update.
++rp_count;
}
}
// If no runtime path needs to be changed, we are done.
if (rp_count == 0) {
return true;
}
// If the resulting rpath is empty, just remove the entire entry instead.
if (remove_rpath) {
return cmSystemTools::RemoveRPath(file, emsg, changed);
}
{
// Open the file for update.
cmsys::ofstream f(file.c_str(),
std::ios::in | std::ios::out | std::ios::binary);
if (!f) {
if (emsg) {
*emsg = "Error opening file for update.";
}
return false;
}
// Store the new RPATH and RUNPATH strings.
for (int i = 0; i < rp_count; ++i) {
// Seek to the RPATH position.
if (!f.seekp(rp[i].Position)) {
if (emsg) {
*emsg = cmStrCat("Error seeking to ", rp[i].Name, " position.");
}
return false;
}
// Write the new rpath. Follow it with enough null terminators to
// fill the string table entry.
f << rp[i].Value;
for (unsigned long j = rp[i].Value.length(); j < rp[i].Size; ++j) {
f << '\0';
}
// Make sure it wrote correctly.
if (!f) {
if (emsg) {
*emsg = cmStrCat("Error writing the new ", rp[i].Name,
" string to the file.");
}
return false;
}
}
}
// Everything was updated successfully.
if (changed) {
*changed = true;
}
return true;
}
#else
bool cmSystemTools::ChangeRPath(std::string const& /*file*/,
std::string const& /*oldRPath*/,
std::string const& /*newRPath*/,
bool /*removeEnvironmentRPath*/,
std::string* /*emsg*/, bool* /*changed*/)
{
return false;
}
#endif
bool cmSystemTools::VersionCompare(cmSystemTools::CompareOp op,
const char* lhss, const char* rhss)
{
const char* endl = lhss;
const char* endr = rhss;
unsigned long lhs;
unsigned long rhs;
while (((*endl >= '0') && (*endl <= '9')) ||
((*endr >= '0') && (*endr <= '9'))) {
// Do component-wise comparison.
lhs = strtoul(endl, const_cast<char**>(&endl), 10);
rhs = strtoul(endr, const_cast<char**>(&endr), 10);
if (lhs < rhs) {
// lhs < rhs, so true if operation is LESS
return (op & cmSystemTools::OP_LESS) != 0;
}
if (lhs > rhs) {
// lhs > rhs, so true if operation is GREATER
return (op & cmSystemTools::OP_GREATER) != 0;
}
if (*endr == '.') {
endr++;
}
if (*endl == '.') {
endl++;
}
}
// lhs == rhs, so true if operation is EQUAL
return (op & cmSystemTools::OP_EQUAL) != 0;
}
bool cmSystemTools::VersionCompareEqual(std::string const& lhs,
std::string const& rhs)
{
return cmSystemTools::VersionCompare(cmSystemTools::OP_EQUAL, lhs.c_str(),
rhs.c_str());
}
bool cmSystemTools::VersionCompareGreater(std::string const& lhs,
std::string const& rhs)
{
return cmSystemTools::VersionCompare(cmSystemTools::OP_GREATER, lhs.c_str(),
rhs.c_str());
}
bool cmSystemTools::VersionCompareGreaterEq(std::string const& lhs,
std::string const& rhs)
{
return cmSystemTools::VersionCompare(cmSystemTools::OP_GREATER_EQUAL,
lhs.c_str(), rhs.c_str());
}
static size_t cm_strverscmp_find_first_difference_or_end(const char* lhs,
const char* rhs)
{
size_t i = 0;
/* Step forward until we find a difference or both strings end together.
The difference may lie on the null-terminator of one string. */
while (lhs[i] == rhs[i] && lhs[i] != 0) {
++i;
}
return i;
}
static size_t cm_strverscmp_find_digits_begin(const char* s, size_t i)
{
/* Step back until we are not preceded by a digit. */
while (i > 0 && isdigit(s[i - 1])) {
--i;
}
return i;
}
static size_t cm_strverscmp_find_digits_end(const char* s, size_t i)
{
/* Step forward over digits. */
while (isdigit(s[i])) {
++i;
}
return i;
}
static size_t cm_strverscmp_count_leading_zeros(const char* s, size_t b)
{
size_t i = b;
/* Step forward over zeros that are followed by another digit. */
while (s[i] == '0' && isdigit(s[i + 1])) {
++i;
}
return i - b;
}
static int cm_strverscmp(const char* lhs, const char* rhs)
{
size_t const i = cm_strverscmp_find_first_difference_or_end(lhs, rhs);
if (lhs[i] != rhs[i]) {
/* The strings differ starting at 'i'. Check for a digit sequence. */
size_t const b = cm_strverscmp_find_digits_begin(lhs, i);
if (b != i || (isdigit(lhs[i]) && isdigit(rhs[i]))) {
/* A digit sequence starts at 'b', preceding or at 'i'. */
/* Look for leading zeros, implying a leading decimal point. */
size_t const lhs_zeros = cm_strverscmp_count_leading_zeros(lhs, b);
size_t const rhs_zeros = cm_strverscmp_count_leading_zeros(rhs, b);
if (lhs_zeros != rhs_zeros) {
/* The side with more leading zeros orders first. */
return rhs_zeros > lhs_zeros ? 1 : -1;
}
if (lhs_zeros == 0) {
/* No leading zeros; compare digit sequence lengths. */
size_t const lhs_end = cm_strverscmp_find_digits_end(lhs, i);
size_t const rhs_end = cm_strverscmp_find_digits_end(rhs, i);
if (lhs_end != rhs_end) {
/* The side with fewer digits orders first. */
return lhs_end > rhs_end ? 1 : -1;
}
}
}
}
/* Ordering was not decided by digit sequence lengths; compare bytes. */
return lhs[i] - rhs[i];
}
int cmSystemTools::strverscmp(std::string const& lhs, std::string const& rhs)
{
return cm_strverscmp(lhs.c_str(), rhs.c_str());
}
#if defined(CMAKE_USE_ELF_PARSER)
bool cmSystemTools::RemoveRPath(std::string const& file, std::string* emsg,
bool* removed)
{
if (removed) {
*removed = false;
}
int zeroCount = 0;
unsigned long zeroPosition[2] = { 0, 0 };
unsigned long zeroSize[2] = { 0, 0 };
unsigned long bytesBegin = 0;
std::vector<char> bytes;
{
// Parse the ELF binary.
cmELF elf(file.c_str());
// Get the RPATH and RUNPATH entries from it and sort them by index
// in the dynamic section header.
int se_count = 0;
cmELF::StringEntry const* se[2] = { nullptr, nullptr };
if (cmELF::StringEntry const* se_rpath = elf.GetRPath()) {
se[se_count++] = se_rpath;
}
if (cmELF::StringEntry const* se_runpath = elf.GetRunPath()) {
se[se_count++] = se_runpath;
}
if (se_count == 0) {
// There is no RPATH or RUNPATH anyway.
return true;
}
if (se_count == 2 && se[1]->IndexInSection < se[0]->IndexInSection) {
std::swap(se[0], se[1]);
}
// Obtain a copy of the dynamic entries
cmELF::DynamicEntryList dentries = elf.GetDynamicEntries();
if (dentries.empty()) {
// This should happen only for invalid ELF files where a DT_NULL
// appears before the end of the table.
if (emsg) {
*emsg = "DYNAMIC section contains a DT_NULL before the end.";
}
return false;
}
// Save information about the string entries to be zeroed.
zeroCount = se_count;
for (int i = 0; i < se_count; ++i) {
zeroPosition[i] = se[i]->Position;
zeroSize[i] = se[i]->Size;
}
// Get size of one DYNAMIC entry
unsigned long const sizeof_dentry =
elf.GetDynamicEntryPosition(1) - elf.GetDynamicEntryPosition(0);
// Adjust the entry list as necessary to remove the run path
unsigned long entriesErased = 0;
for (auto it = dentries.begin(); it != dentries.end();) {
if (it->first == cmELF::TagRPath || it->first == cmELF::TagRunPath) {
it = dentries.erase(it);
entriesErased++;
continue;
}
if (cmELF::TagMipsRldMapRel != 0 &&
it->first == cmELF::TagMipsRldMapRel) {
// Background: debuggers need to know the "linker map" which contains
// the addresses each dynamic object is loaded at. Most arches use
// the DT_DEBUG tag which the dynamic linker writes to (directly) and
// contain the location of the linker map, however on MIPS the
// .dynamic section is always read-only so this is not possible. MIPS
// objects instead contain a DT_MIPS_RLD_MAP tag which contains the
// address where the dynamic linker will write to (an indirect
// version of DT_DEBUG). Since this doesn't work when using PIE, a
// relative equivalent was created - DT_MIPS_RLD_MAP_REL. Since this
// version contains a relative offset, moving it changes the
// calculated address. This may cause the dynamic linker to write
// into memory it should not be changing.
//
// To fix this, we adjust the value of DT_MIPS_RLD_MAP_REL here. If
// we move it up by n bytes, we add n bytes to the value of this tag.
it->second += entriesErased * sizeof_dentry;
}
it++;
}
// Encode new entries list
bytes = elf.EncodeDynamicEntries(dentries);
bytesBegin = elf.GetDynamicEntryPosition(0);
}
// Open the file for update.
cmsys::ofstream f(file.c_str(),
std::ios::in | std::ios::out | std::ios::binary);
if (!f) {
if (emsg) {
*emsg = "Error opening file for update.";
}
return false;
}
// Write the new DYNAMIC table header.
if (!f.seekp(bytesBegin)) {
if (emsg) {
*emsg = "Error seeking to DYNAMIC table header for RPATH.";
}
return false;
}
if (!f.write(&bytes[0], bytes.size())) {
if (emsg) {
*emsg = "Error replacing DYNAMIC table header.";
}
return false;
}
// Fill the RPATH and RUNPATH strings with zero bytes.
for (int i = 0; i < zeroCount; ++i) {
if (!f.seekp(zeroPosition[i])) {
if (emsg) {
*emsg = "Error seeking to RPATH position.";
}
return false;
}
for (unsigned long j = 0; j < zeroSize[i]; ++j) {
f << '\0';
}
if (!f) {
if (emsg) {
*emsg = "Error writing the empty rpath string to the file.";
}
return false;
}
}
// Everything was updated successfully.
if (removed) {
*removed = true;
}
return true;
}
#else
bool cmSystemTools::RemoveRPath(std::string const& /*file*/,
std::string* /*emsg*/, bool* /*removed*/)
{
return false;
}
#endif
bool cmSystemTools::CheckRPath(std::string const& file,
std::string const& newRPath)
{
#if defined(CMAKE_USE_ELF_PARSER)
// Parse the ELF binary.
cmELF elf(file.c_str());
// Get the RPATH or RUNPATH entry from it.
cmELF::StringEntry const* se = elf.GetRPath();
if (!se) {
se = elf.GetRunPath();
}
// Make sure the current rpath contains the new rpath.
if (newRPath.empty()) {
if (!se) {
return true;
}
} else {
if (se &&
cmSystemToolsFindRPath(se->Value, newRPath) != std::string::npos) {
return true;
}
}
return false;
#else
(void)file;
(void)newRPath;
return false;
#endif
}
bool cmSystemTools::RepeatedRemoveDirectory(const std::string& dir)
{
#ifdef _WIN32
// Windows sometimes locks files temporarily so try a few times.
WindowsFileRetry retry = cmSystemTools::GetWindowsFileRetry();
for (unsigned int i = 0; i < retry.Count; ++i) {
if (cmSystemTools::RemoveADirectory(dir)) {
return true;
}
cmSystemTools::Delay(retry.Delay);
}
return false;
#else
return cmSystemTools::RemoveADirectory(dir);
#endif
}
std::string cmSystemTools::EncodeURL(std::string const& in, bool escapeSlashes)
{
std::string out;
for (char c : in) {
char hexCh[4] = { 0, 0, 0, 0 };
hexCh[0] = c;
switch (c) {
case '+':
case '?':
case '\\':
case '&':
case ' ':
case '=':
case '%':
sprintf(hexCh, "%%%02X", static_cast<int>(c));
break;
case '/':
if (escapeSlashes) {
strcpy(hexCh, "%2F");
}
break;
default:
break;
}
out.append(hexCh);
}
return out;
}
bool cmSystemTools::CreateSymlink(const std::string& origName,
const std::string& newName,
std::string* errorMessage)
{
uv_fs_t req;
int flags = 0;
#if defined(_WIN32)
if (cmsys::SystemTools::FileIsDirectory(origName)) {
flags |= UV_FS_SYMLINK_DIR;
}
#endif
int err = uv_fs_symlink(nullptr, &req, origName.c_str(), newName.c_str(),
flags, nullptr);
if (err) {
std::string e =
"failed to create symbolic link '" + newName + "': " + uv_strerror(err);
if (errorMessage) {
*errorMessage = std::move(e);
} else {
cmSystemTools::Error(e);
}
return false;
}
return true;
}
bool cmSystemTools::CreateLink(const std::string& origName,
const std::string& newName,
std::string* errorMessage)
{
uv_fs_t req;
int err =
uv_fs_link(nullptr, &req, origName.c_str(), newName.c_str(), nullptr);
if (err) {
std::string e =
"failed to create link '" + newName + "': " + uv_strerror(err);
if (errorMessage) {
*errorMessage = std::move(e);
} else {
cmSystemTools::Error(e);
}
return false;
}
return true;
}
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