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base / command_line.cc [blame]
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include "base/command_line.h"
#include <ostream>
#include <string_view>
#include "base/check_op.h"
#include "base/containers/contains.h"
#include "base/containers/span.h"
#include "base/debug/debugging_buildflags.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/notreached.h"
#include "base/numerics/checked_math.h"
#include "base/ranges/algorithm.h"
#include "base/strings/strcat.h"
#include "base/strings/string_split.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#include <shellapi.h>
#include "base/strings/string_util_win.h"
#endif // BUILDFLAG(IS_WIN)
namespace base {
CommandLine* CommandLine::current_process_commandline_ = nullptr;
namespace {
DuplicateSwitchHandler* g_duplicate_switch_handler = nullptr;
constexpr CommandLine::CharType kSwitchTerminator[] = FILE_PATH_LITERAL("--");
constexpr CommandLine::CharType kSwitchValueSeparator[] =
FILE_PATH_LITERAL("=");
// Since we use a lazy match, make sure that longer versions (like "--") are
// listed before shorter versions (like "-") of similar prefixes.
#if BUILDFLAG(IS_WIN)
// By putting slash last, we can control whether it is treaded as a switch
// value by changing the value of switch_prefix_count to be one less than
// the array size.
constexpr CommandLine::StringViewType kSwitchPrefixes[] = {L"--", L"-", L"/"};
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
// Unixes don't use slash as a switch.
constexpr CommandLine::StringViewType kSwitchPrefixes[] = {"--", "-"};
#endif
size_t switch_prefix_count = std::size(kSwitchPrefixes);
#if BUILDFLAG(IS_WIN)
// Switch string that specifies the single argument to the command line.
// If present, everything after this switch is interpreted as a single
// argument regardless of whitespace, quotes, etc. Used for launches from the
// Windows shell, which may have arguments with unencoded quotes that could
// otherwise unexpectedly be split into multiple arguments
// (https://crbug.com/937179).
constexpr CommandLine::CharType kSingleArgument[] =
FILE_PATH_LITERAL("single-argument");
#endif // BUILDFLAG(IS_WIN)
size_t GetSwitchPrefixLength(CommandLine::StringViewType string) {
for (size_t i = 0; i < switch_prefix_count; ++i) {
CommandLine::StringType prefix(kSwitchPrefixes[i]);
if (string.substr(0, prefix.length()) == prefix)
return prefix.length();
}
return 0;
}
// Fills in |switch_string| and |switch_value| if |string| is a switch.
// This will preserve the input switch prefix in the output |switch_string|.
bool IsSwitch(const CommandLine::StringType& string,
CommandLine::StringType* switch_string,
CommandLine::StringType* switch_value) {
switch_string->clear();
switch_value->clear();
size_t prefix_length = GetSwitchPrefixLength(string);
if (prefix_length == 0 || prefix_length == string.length())
return false;
const size_t equals_position = string.find(kSwitchValueSeparator);
*switch_string = string.substr(0, equals_position);
if (equals_position != CommandLine::StringType::npos)
*switch_value = string.substr(equals_position + 1);
return true;
}
// Returns true iff |string| represents a switch with key
// |switch_key_without_prefix|, regardless of value.
bool IsSwitchWithKey(CommandLine::StringViewType string,
CommandLine::StringViewType switch_key_without_prefix) {
size_t prefix_length = GetSwitchPrefixLength(string);
if (prefix_length == 0 || prefix_length == string.length())
return false;
const size_t equals_position = string.find(kSwitchValueSeparator);
return string.substr(prefix_length, equals_position - prefix_length) ==
switch_key_without_prefix;
}
#if BUILDFLAG(IS_WIN)
// Quotes a string as necessary for CommandLineToArgvW compatibility *on
// Windows*.
// http://msdn.microsoft.com/en-us/library/17w5ykft.aspx#parsing-c-command-line-arguments.
std::wstring QuoteForCommandLineToArgvWInternal(
const std::wstring& arg,
bool allow_unsafe_insert_sequences) {
// Ensures that GetCommandLineString isn't used to generate command-line
// strings for the Windows shell by checking for Windows insert sequences like
// "%1". GetCommandLineStringForShell should be used instead to get a string
// with the correct placeholder format for the shell.
DCHECK(arg.size() != 2 || arg[0] != L'%' || allow_unsafe_insert_sequences);
constexpr wchar_t kQuotableCharacters[] = L" \t\\\"";
if (arg.find_first_of(kQuotableCharacters) == std::wstring::npos) {
return arg;
}
std::wstring out(1, L'"');
for (size_t i = 0; i < arg.size(); ++i) {
if (arg[i] == L'\\') {
// Finds the extent of this run of backslashes.
size_t end = i + 1;
while (end < arg.size() && arg[end] == L'\\') {
++end;
}
const size_t backslash_count = end - i;
// Backslashes are escaped only if the run is followed by a double quote.
// Since we also will end the string with a double quote, we escape for
// either a double quote or the end of the string.
const size_t backslash_multiplier =
(end == arg.size() || arg[end] == L'"') ? 2 : 1;
out.append(std::wstring(backslash_count * backslash_multiplier, L'\\'));
// Advances `i` to one before `end` to balance `++i` in loop.
i = end - 1;
} else if (arg[i] == L'"') {
out.append(LR"(\")");
} else {
out.push_back(arg[i]);
}
}
out.push_back(L'"');
return out;
}
#endif // BUILDFLAG(IS_WIN)
} // namespace
// static
void CommandLine::SetDuplicateSwitchHandler(
std::unique_ptr<DuplicateSwitchHandler> new_duplicate_switch_handler) {
delete g_duplicate_switch_handler;
g_duplicate_switch_handler = new_duplicate_switch_handler.release();
}
CommandLine::CommandLine(NoProgram no_program) : argv_(1), begin_args_(1) {}
CommandLine::CommandLine(const FilePath& program)
: argv_(1),
begin_args_(1) {
SetProgram(program);
}
CommandLine::CommandLine(int argc, const CommandLine::CharType* const* argv)
: argv_(1), begin_args_(1) {
InitFromArgv(argc, argv);
}
CommandLine::CommandLine(const StringVector& argv)
: argv_(1),
begin_args_(1) {
InitFromArgv(argv);
}
CommandLine::CommandLine(const CommandLine& other) = default;
CommandLine::CommandLine(CommandLine&& other) noexcept
:
#if BUILDFLAG(IS_WIN)
raw_command_line_string_(
std::exchange(other.raw_command_line_string_, StringViewType())),
has_single_argument_switch_(
std::exchange(other.has_single_argument_switch_, false)),
#endif // BUILDFLAG(IS_WIN)
argv_(std::exchange(other.argv_, StringVector(1))),
switches_(std::move(other.switches_)),
begin_args_(std::exchange(other.begin_args_, 1)) {
#if BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
other.sequence_checker_.Detach();
#endif
}
CommandLine& CommandLine::operator=(const CommandLine& other) = default;
CommandLine& CommandLine::operator=(CommandLine&& other) noexcept {
#if BUILDFLAG(IS_WIN)
raw_command_line_string_ =
std::exchange(other.raw_command_line_string_, StringViewType());
has_single_argument_switch_ =
std::exchange(other.has_single_argument_switch_, false);
#endif // BUILDFLAG(IS_WIN)
argv_ = std::exchange(other.argv_, StringVector(1));
switches_ = std::move(other.switches_);
begin_args_ = std::exchange(other.begin_args_, 1);
#if BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
other.sequence_checker_.Detach();
#endif
return *this;
}
CommandLine::~CommandLine() = default;
#if BUILDFLAG(IS_WIN)
// static
void CommandLine::set_slash_is_not_a_switch() {
// The last switch prefix should be slash, so adjust the size to skip it.
static_assert(base::span(kSwitchPrefixes).back() == L"/",
"Error: Last switch prefix is not a slash.");
switch_prefix_count = std::size(kSwitchPrefixes) - 1;
}
// static
void CommandLine::InitUsingArgvForTesting(int argc, const char* const* argv) {
DCHECK(!current_process_commandline_);
current_process_commandline_ = new CommandLine(NO_PROGRAM);
// On Windows we need to convert the command line arguments to std::wstring.
CommandLine::StringVector argv_vector;
for (int i = 0; i < argc; ++i)
argv_vector.push_back(UTF8ToWide(argv[i]));
current_process_commandline_->InitFromArgv(argv_vector);
}
#endif // BUILDFLAG(IS_WIN)
// static
bool CommandLine::Init(int argc, const char* const* argv) {
if (current_process_commandline_) {
// If this is intentional, Reset() must be called first. If we are using
// the shared build mode, we have to share a single object across multiple
// shared libraries.
return false;
}
current_process_commandline_ = new CommandLine(NO_PROGRAM);
#if BUILDFLAG(IS_WIN)
current_process_commandline_->ParseFromString(::GetCommandLineW());
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
current_process_commandline_->InitFromArgv(argc, argv);
#else
#error Unsupported platform
#endif
return true;
}
// static
void CommandLine::Reset() {
DCHECK(current_process_commandline_);
delete current_process_commandline_;
current_process_commandline_ = nullptr;
}
// static
CommandLine* CommandLine::ForCurrentProcess() {
DCHECK(current_process_commandline_);
return current_process_commandline_;
}
// static
bool CommandLine::InitializedForCurrentProcess() {
return !!current_process_commandline_;
}
// static
CommandLine CommandLine::FromArgvWithoutProgram(const StringVector& argv) {
CommandLine cmd(NO_PROGRAM);
cmd.AppendSwitchesAndArguments(argv);
return cmd;
}
#if BUILDFLAG(IS_WIN)
// static
CommandLine CommandLine::FromString(StringViewType command_line) {
CommandLine cmd(NO_PROGRAM);
cmd.ParseFromString(command_line);
return cmd;
}
#endif // BUILDFLAG(IS_WIN)
void CommandLine::InitFromArgv(int argc,
const CommandLine::CharType* const* argv) {
StringVector new_argv;
for (int i = 0; i < argc; ++i)
new_argv.push_back(argv[i]);
InitFromArgv(new_argv);
}
void CommandLine::InitFromArgv(const StringVector& argv) {
argv_ = StringVector(1);
switches_.clear();
begin_args_ = 1;
SetProgram(argv.empty() ? FilePath() : FilePath(argv[0]));
if (!argv.empty()) {
AppendSwitchesAndArguments(span(argv).subspan<1>());
}
}
FilePath CommandLine::GetProgram() const {
return FilePath(argv_[0]);
}
void CommandLine::SetProgram(const FilePath& program) {
#if BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
sequence_checker_.Check();
#endif
#if BUILDFLAG(IS_WIN)
argv_[0] = StringType(TrimWhitespace(program.value(), TRIM_ALL));
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
TrimWhitespaceASCII(program.value(), TRIM_ALL, &argv_[0]);
#else
#error Unsupported platform
#endif
}
bool CommandLine::HasSwitch(std::string_view switch_string) const {
DCHECK_EQ(ToLowerASCII(switch_string), switch_string);
return Contains(switches_, switch_string);
}
bool CommandLine::HasSwitch(const char switch_constant[]) const {
return HasSwitch(std::string_view(switch_constant));
}
std::string CommandLine::GetSwitchValueASCII(
std::string_view switch_string) const {
StringType value = GetSwitchValueNative(switch_string);
#if BUILDFLAG(IS_WIN)
if (!IsStringASCII(base::AsStringPiece16(value))) {
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
if (!IsStringASCII(value)) {
#endif
DLOG(WARNING) << "Value of switch (" << switch_string << ") must be ASCII.";
return std::string();
}
#if BUILDFLAG(IS_WIN)
return WideToUTF8(value);
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
return value;
#endif
}
FilePath CommandLine::GetSwitchValuePath(std::string_view switch_string) const {
return FilePath(GetSwitchValueNative(switch_string));
}
CommandLine::StringType CommandLine::GetSwitchValueNative(
std::string_view switch_string) const {
DCHECK_EQ(ToLowerASCII(switch_string), switch_string);
auto result = switches_.find(switch_string);
return result == switches_.end() ? StringType() : result->second;
}
void CommandLine::AppendSwitch(std::string_view switch_string) {
AppendSwitchNative(switch_string, StringType());
}
void CommandLine::AppendSwitchPath(std::string_view switch_string,
const FilePath& path) {
AppendSwitchNative(switch_string, path.value());
}
void CommandLine::AppendSwitchNative(std::string_view switch_string,
CommandLine::StringViewType value) {
#if BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
sequence_checker_.Check();
#endif
#if BUILDFLAG(IS_WIN)
const std::string switch_key = ToLowerASCII(switch_string);
StringType combined_switch_string(UTF8ToWide(switch_key));
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
std::string_view switch_key = switch_string;
StringType combined_switch_string(switch_key);
#endif
size_t prefix_length = GetSwitchPrefixLength(combined_switch_string);
auto key = switch_key.substr(prefix_length);
if (g_duplicate_switch_handler) {
g_duplicate_switch_handler->ResolveDuplicate(key, value,
switches_[std::string(key)]);
} else {
switches_[std::string(key)] = StringType(value);
}
// Preserve existing switch prefixes in |argv_|; only append one if necessary.
if (prefix_length == 0) {
combined_switch_string.insert(0, kSwitchPrefixes[0].data(),
kSwitchPrefixes[0].size());
}
if (!value.empty())
base::StrAppend(&combined_switch_string, {kSwitchValueSeparator, value});
// Append the switch and update the switches/arguments divider |begin_args_|.
argv_.insert(argv_.begin() + begin_args_, combined_switch_string);
begin_args_ = (CheckedNumeric(begin_args_) + 1).ValueOrDie();
}
void CommandLine::AppendSwitchASCII(std::string_view switch_string,
std::string_view value_string) {
#if BUILDFLAG(IS_WIN)
AppendSwitchNative(switch_string, UTF8ToWide(value_string));
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
AppendSwitchNative(switch_string, value_string);
#else
#error Unsupported platform
#endif
}
void CommandLine::RemoveSwitch(std::string_view switch_key_without_prefix) {
#if BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
sequence_checker_.Check();
#endif
#if BUILDFLAG(IS_WIN)
StringType switch_key_native = UTF8ToWide(switch_key_without_prefix);
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
StringType switch_key_native(switch_key_without_prefix);
#endif
DCHECK_EQ(ToLowerASCII(switch_key_without_prefix), switch_key_without_prefix);
DCHECK_EQ(0u, GetSwitchPrefixLength(switch_key_native));
auto it = switches_.find(switch_key_without_prefix);
if (it == switches_.end())
return;
switches_.erase(it);
// Also erase from the switches section of |argv_| and update |begin_args_|
// accordingly.
// Switches in |argv_| have indices [1, begin_args_).
auto argv_switches_begin = argv_.begin() + 1;
auto argv_switches_end = argv_.begin() + begin_args_;
DCHECK(argv_switches_begin <= argv_switches_end);
DCHECK(argv_switches_end <= argv_.end());
auto expell = std::remove_if(argv_switches_begin, argv_switches_end,
[&switch_key_native](const StringType& arg) {
return IsSwitchWithKey(arg, switch_key_native);
});
if (expell == argv_switches_end) {
NOTREACHED();
}
begin_args_ -= argv_switches_end - expell;
argv_.erase(expell, argv_switches_end);
}
void CommandLine::CopySwitchesFrom(const CommandLine& source,
span<const char* const> switches) {
for (const char* entry : switches) {
if (source.HasSwitch(entry)) {
AppendSwitchNative(entry, source.GetSwitchValueNative(entry));
}
}
}
CommandLine::StringVector CommandLine::GetArgs() const {
// Gather all arguments after the last switch (may include kSwitchTerminator).
StringVector args(argv_.begin() + begin_args_, argv_.end());
// Erase only the first kSwitchTerminator (maybe "--" is a legitimate page?)
auto switch_terminator = ranges::find(args, kSwitchTerminator);
if (switch_terminator != args.end())
args.erase(switch_terminator);
return args;
}
void CommandLine::AppendArg(std::string_view value) {
#if BUILDFLAG(IS_WIN)
DCHECK(IsStringUTF8(value));
AppendArgNative(UTF8ToWide(value));
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
AppendArgNative(value);
#else
#error Unsupported platform
#endif
}
void CommandLine::AppendArgPath(const FilePath& path) {
AppendArgNative(path.value());
}
void CommandLine::AppendArgNative(StringViewType value) {
#if BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
sequence_checker_.Check();
#endif
argv_.push_back(StringType(value));
}
void CommandLine::AppendArguments(const CommandLine& other,
bool include_program) {
if (include_program)
SetProgram(other.GetProgram());
if (!other.argv().empty()) {
AppendSwitchesAndArguments(span(other.argv()).subspan<1>());
}
}
void CommandLine::PrependWrapper(StringViewType wrapper) {
#if BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
sequence_checker_.Check();
#endif
if (wrapper.empty())
return;
// Split the wrapper command based on whitespace (with quoting).
// StringViewType does not currently work directly with StringTokenizerT.
using CommandLineTokenizer =
StringTokenizerT<StringType, StringType::const_iterator>;
StringType wrapper_string(wrapper);
CommandLineTokenizer tokenizer(wrapper_string, FILE_PATH_LITERAL(" "));
tokenizer.set_quote_chars(FILE_PATH_LITERAL("'\""));
std::vector<StringType> wrapper_argv;
while (std::optional<StringViewType> token = tokenizer.GetNextTokenView()) {
wrapper_argv.emplace_back(token.value());
}
// Prepend the wrapper and update the switches/arguments |begin_args_|.
argv_.insert(argv_.begin(), wrapper_argv.begin(), wrapper_argv.end());
begin_args_ += wrapper_argv.size();
}
#if BUILDFLAG(IS_WIN)
void CommandLine::ParseFromString(StringViewType command_line) {
command_line = TrimWhitespace(command_line, TRIM_ALL);
if (command_line.empty())
return;
raw_command_line_string_ = command_line;
int num_args = 0;
wchar_t** args = NULL;
// When calling CommandLineToArgvW, use the apiset if available.
// Doing so will bypass loading shell32.dll on Windows.
HMODULE downlevel_shell32_dll =
::LoadLibraryEx(L"api-ms-win-downlevel-shell32-l1-1-0.dll", nullptr,
LOAD_LIBRARY_SEARCH_SYSTEM32);
if (downlevel_shell32_dll) {
auto command_line_to_argv_w_proc =
reinterpret_cast<decltype(::CommandLineToArgvW)*>(
::GetProcAddress(downlevel_shell32_dll, "CommandLineToArgvW"));
if (command_line_to_argv_w_proc)
args = command_line_to_argv_w_proc(command_line.data(), &num_args);
} else {
// Since the apiset is not available, allow the delayload of shell32.dll
// to take place.
args = ::CommandLineToArgvW(command_line.data(), &num_args);
}
DPLOG_IF(FATAL, !args) << "CommandLineToArgvW failed on command line: "
<< command_line;
StringVector argv(args, args + num_args);
InitFromArgv(argv);
raw_command_line_string_ = StringViewType();
LocalFree(args);
if (downlevel_shell32_dll)
::FreeLibrary(downlevel_shell32_dll);
}
#endif // BUILDFLAG(IS_WIN)
void CommandLine::AppendSwitchesAndArguments(span<const StringType> argv) {
bool parse_switches = true;
#if BUILDFLAG(IS_WIN)
const bool is_parsed_from_string = !raw_command_line_string_.empty();
#endif
for (StringType arg : argv) {
#if BUILDFLAG(IS_WIN)
arg = CommandLine::StringType(TrimWhitespace(arg, TRIM_ALL));
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
TrimWhitespaceASCII(arg, TRIM_ALL, &arg);
#endif
CommandLine::StringType switch_string;
CommandLine::StringType switch_value;
parse_switches &= (arg != kSwitchTerminator);
if (parse_switches && IsSwitch(arg, &switch_string, &switch_value)) {
#if BUILDFLAG(IS_WIN)
if (is_parsed_from_string &&
IsSwitchWithKey(switch_string, kSingleArgument)) {
ParseAsSingleArgument(switch_string);
return;
}
AppendSwitchNative(WideToUTF8(switch_string), switch_value);
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
AppendSwitchNative(switch_string, switch_value);
#else
#error Unsupported platform
#endif
} else {
AppendArgNative(arg);
}
}
}
CommandLine::StringType CommandLine::GetArgumentsStringInternal(
bool allow_unsafe_insert_sequences) const {
StringType params;
// Append switches and arguments.
bool parse_switches = true;
#if BUILDFLAG(IS_WIN)
bool appended_single_argument_switch = false;
#endif
for (size_t i = 1; i < argv_.size(); ++i) {
StringType arg = argv_[i];
StringType switch_string;
StringType switch_value;
parse_switches &= arg != kSwitchTerminator;
if (i > 1)
params.append(FILE_PATH_LITERAL(" "));
if (parse_switches && IsSwitch(arg, &switch_string, &switch_value)) {
params.append(switch_string);
if (!switch_value.empty()) {
#if BUILDFLAG(IS_WIN)
switch_value = QuoteForCommandLineToArgvWInternal(
switch_value, allow_unsafe_insert_sequences);
#endif
params.append(kSwitchValueSeparator + switch_value);
}
} else {
#if BUILDFLAG(IS_WIN)
if (has_single_argument_switch_) {
// Check that we don't have multiple arguments when
// `has_single_argument_switch_` is true.
DCHECK(!appended_single_argument_switch);
appended_single_argument_switch = true;
params.append(base::StrCat(
{kSwitchPrefixes[0], kSingleArgument, FILE_PATH_LITERAL(" ")}));
} else {
arg = QuoteForCommandLineToArgvWInternal(arg,
allow_unsafe_insert_sequences);
}
#endif
params.append(arg);
}
}
return params;
}
CommandLine::StringType CommandLine::GetCommandLineString() const {
StringType string(argv_[0]);
#if BUILDFLAG(IS_WIN)
string = QuoteForCommandLineToArgvWInternal(
string,
/*allow_unsafe_insert_sequences=*/false);
#endif
StringType params(GetArgumentsString());
if (!params.empty()) {
string.append(FILE_PATH_LITERAL(" "));
string.append(params);
}
return string;
}
#if BUILDFLAG(IS_WIN)
// static
std::wstring CommandLine::QuoteForCommandLineToArgvW(const std::wstring& arg) {
return QuoteForCommandLineToArgvWInternal(
arg, /*allow_unsafe_insert_sequences=*/false);
}
// NOTE: this function is used to set Chrome's open command in the registry
// during update. Any change to the syntax must be compatible with the prior
// version (i.e., any new syntax must be understood by older browsers expecting
// the old syntax, and the new browser must still handle the old syntax), as
// old versions are likely to persist, e.g., immediately after background
// update, when parsing command lines for other channels, when uninstalling web
// applications installed using the old syntax, etc.
CommandLine::StringType CommandLine::GetCommandLineStringForShell() const {
DCHECK(GetArgs().empty());
StringType command_line_string = GetCommandLineString();
return command_line_string + FILE_PATH_LITERAL(" ") +
StringType(kSwitchPrefixes[0]) + kSingleArgument +
FILE_PATH_LITERAL(" %1");
}
CommandLine::StringType
CommandLine::GetCommandLineStringWithUnsafeInsertSequences() const {
StringType string(argv_[0]);
string = QuoteForCommandLineToArgvWInternal(
string,
/*allow_unsafe_insert_sequences=*/true);
StringType params(
GetArgumentsStringInternal(/*allow_unsafe_insert_sequences=*/true));
if (!params.empty()) {
string.append(FILE_PATH_LITERAL(" "));
string.append(params);
}
return string;
}
#endif // BUILDFLAG(IS_WIN)
CommandLine::StringType CommandLine::GetArgumentsString() const {
return GetArgumentsStringInternal(/*allow_unsafe_insert_sequences=*/false);
}
#if BUILDFLAG(IS_WIN)
void CommandLine::ParseAsSingleArgument(
const CommandLine::StringType& single_arg_switch) {
DCHECK(!raw_command_line_string_.empty());
// Remove any previously parsed arguments.
argv_.resize(static_cast<size_t>(begin_args_));
// Locate "--single-argument" in the process's raw command line. Results are
// unpredictable if "--single-argument" appears as part of a previous
// argument or switch.
const size_t single_arg_switch_position =
raw_command_line_string_.find(single_arg_switch);
DCHECK_NE(single_arg_switch_position, StringType::npos);
// Append the portion of the raw command line that starts one character past
// "--single-argument" as the one and only argument, or return if no
// argument is present.
const size_t arg_position =
single_arg_switch_position + single_arg_switch.length() + 1;
if (arg_position >= raw_command_line_string_.length())
return;
has_single_argument_switch_ = true;
const StringViewType arg = raw_command_line_string_.substr(arg_position);
if (!arg.empty()) {
AppendArgNative(arg);
}
}
#endif // BUILDFLAG(IS_WIN)
void CommandLine::DetachFromCurrentSequence() {
#if BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
sequence_checker_.Detach();
#endif // BUILDFLAG(ENABLE_COMMANDLINE_SEQUENCE_CHECKS)
}
} // namespace base