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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /security/sandbox/chromium/base/environment.cc | |
parent | Initial commit. (diff) | |
download | firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'security/sandbox/chromium/base/environment.cc')
-rw-r--r-- | security/sandbox/chromium/base/environment.cc | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/environment.cc b/security/sandbox/chromium/base/environment.cc new file mode 100644 index 0000000000..8e3afd8983 --- /dev/null +++ b/security/sandbox/chromium/base/environment.cc @@ -0,0 +1,123 @@ +// Copyright (c) 2012 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "base/environment.h" + +#include "base/memory/ptr_util.h" +#include "base/strings/string_piece.h" +#include "base/strings/string_util.h" +#include "base/strings/utf_string_conversions.h" +#include "build/build_config.h" + +#if defined(OS_WIN) +#include <windows.h> +#elif defined(OS_POSIX) || defined(OS_FUCHSIA) +#include <stdlib.h> +#endif + +namespace base { + +namespace { + +class EnvironmentImpl : public Environment { + public: + bool GetVar(StringPiece variable_name, std::string* result) override { + if (GetVarImpl(variable_name, result)) + return true; + + // Some commonly used variable names are uppercase while others + // are lowercase, which is inconsistent. Let's try to be helpful + // and look for a variable name with the reverse case. + // I.e. HTTP_PROXY may be http_proxy for some users/systems. + char first_char = variable_name[0]; + std::string alternate_case_var; + if (IsAsciiLower(first_char)) + alternate_case_var = ToUpperASCII(variable_name); + else if (IsAsciiUpper(first_char)) + alternate_case_var = ToLowerASCII(variable_name); + else + return false; + return GetVarImpl(alternate_case_var, result); + } + + bool SetVar(StringPiece variable_name, + const std::string& new_value) override { + return SetVarImpl(variable_name, new_value); + } + + bool UnSetVar(StringPiece variable_name) override { + return UnSetVarImpl(variable_name); + } + + private: + bool GetVarImpl(StringPiece variable_name, std::string* result) { +#if defined(OS_WIN) + DWORD value_length = + ::GetEnvironmentVariable(UTF8ToWide(variable_name).c_str(), nullptr, 0); + if (value_length == 0) + return false; + if (result) { + std::unique_ptr<wchar_t[]> value(new wchar_t[value_length]); + ::GetEnvironmentVariable(UTF8ToWide(variable_name).c_str(), value.get(), + value_length); + *result = WideToUTF8(value.get()); + } + return true; +#elif defined(OS_POSIX) || defined(OS_FUCHSIA) + const char* env_value = getenv(variable_name.data()); + if (!env_value) + return false; + // Note that the variable may be defined but empty. + if (result) + *result = env_value; + return true; +#endif + } + + bool SetVarImpl(StringPiece variable_name, const std::string& new_value) { +#if defined(OS_WIN) + // On success, a nonzero value is returned. + return !!SetEnvironmentVariable(UTF8ToWide(variable_name).c_str(), + UTF8ToWide(new_value).c_str()); +#elif defined(OS_POSIX) || defined(OS_FUCHSIA) + // On success, zero is returned. + return !setenv(variable_name.data(), new_value.c_str(), 1); +#endif + } + + bool UnSetVarImpl(StringPiece variable_name) { +#if defined(OS_WIN) + // On success, a nonzero value is returned. + return !!SetEnvironmentVariable(UTF8ToWide(variable_name).c_str(), nullptr); +#elif defined(OS_POSIX) || defined(OS_FUCHSIA) + // On success, zero is returned. + return !unsetenv(variable_name.data()); +#endif + } +}; + +} // namespace + +namespace env_vars { + +#if defined(OS_POSIX) || defined(OS_FUCHSIA) +// On Posix systems, this variable contains the location of the user's home +// directory. (e.g, /home/username/). +const char kHome[] = "HOME"; +#endif + +} // namespace env_vars + +Environment::~Environment() = default; + +// static +std::unique_ptr<Environment> Environment::Create() { + return std::make_unique<EnvironmentImpl>(); +} + +bool Environment::HasVar(StringPiece variable_name) { + return GetVar(variable_name, nullptr); +} + +} // namespace base |