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datadog-setup.php
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datadog-setup.php
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<?php
// Tests for the installer are in 'dockerfiles/verify_packages/installer'
const INI_SCANDIR = 'Scan this dir for additional .ini files';
const INI_MAIN = 'Loaded Configuration File';
const EXTENSION_DIR = 'extension_dir';
const THREAD_SAFETY = 'Thread Safety';
const PHP_VER = 'PHP Version';
const PHP_API = 'PHP API';
const IS_DEBUG = 'Debug Build';
// Commands
const CMD_CONFIG_GET = 'config get';
const CMD_CONFIG_SET = 'config set';
const CMD_CONFIG_LIST = 'config list';
// Options
const OPT_HELP = 'help';
const OPT_INSTALL_DIR = 'install-dir';
const OPT_EXTENSION_DIR = 'extension-dir';
const OPT_PHP_BIN = 'php-bin';
const OPT_PHP_INI = 'ini';
const OPT_FILE = 'file';
const OPT_UNINSTALL = 'uninstall';
const OPT_ENABLE_APPSEC = 'enable-appsec';
const OPT_ENABLE_PROFILING = 'enable-profiling';
const OPT_INI_SETTING = 'd';
// Release version is set while generating the final release files
const RELEASE_VERSION = '@release_version@';
// phpcs:disable Generic.Files.LineLength.TooLong
// For testing purposes, we need an alternate repo where we can push bundles that includes changes that we are
// trying to test, as the previously released versions would not have those changes.
define('RELEASE_URL_PREFIX', (getenv('DD_TEST_INSTALLER_REPO') ?: "https://github.com/DataDog/dd-trace-php") . "/releases/download/" . RELEASE_VERSION . "/");
// phpcs:enable Generic.Files.LineLength.TooLong
define('IS_WINDOWS', strncasecmp(PHP_OS, "WIN", 3) == 0);
define('EXTENSION_PREFIX', IS_WINDOWS ? "php_" : "");
define('EXTENSION_SUFFIX', IS_WINDOWS ? "dll" : "so");
define('DEFAULT_INSTALL_DIR', IS_WINDOWS ? getenv('ProgramW6432') . '\Datadog\PHP Tracer' : '/opt/datadog');
/**
* The number of items to shift off `get_ini_settings` for config commands.
*/
const CMD_CONFIG_NUM_SHIFT = 3;
function main()
{
if (is_truthy(getenv('DD_TEST_EXECUTION'))) {
return;
}
$arguments = parse_validate_user_options();
$options = $arguments['opts'];
switch ($arguments['cmd']) {
case CMD_CONFIG_GET:
cmd_config_get($options);
break;
case CMD_CONFIG_SET:
cmd_config_set($options);
break;
case CMD_CONFIG_LIST:
cmd_config_list($options);
break;
default:
if ($options[OPT_UNINSTALL]) {
uninstall($options);
} else {
install($options);
}
}
}
function print_help()
{
$installdir = DEFAULT_INSTALL_DIR;
echo <<<EOD
Usage:
Interactive
php datadog-setup.php [command] ...
Non-Interactive
php datadog-setup.php --php-bin php ...
php datadog-setup.php --php-bin php --php-bin /usr/local/sbin/php-fpm ...
php datadog-setup.php config get --php-bin php -d datadog.profiling.enabled
php datadog-setup.php config set --php-bin php -d datadog.profiling.enabled=On
Options:
-h, --help Print this help text and exit.
--php-bin all|<path to php> Install the library to the specified binary or
all php binaries in standard search paths. The
option can be provided multiple times.
--install-dir <path> Install to a specific directory. Default: '$installdir'
--uninstall Uninstall the library from the specified binaries.
--file <path to .tar.gz> Path to a dd-library-php-*.tar.gz file. Can be used for offline installation.
--extension-dir <path> Specify the extension directory. Default: PHP's extension directory.
--ini <path> Specify the INI file to use. Default: <ini-dir>/98-ddtrace.ini
--enable-appsec Enable the application security monitoring module.
--enable-profiling Enable the profiling module.
-d setting[=value] Used in conjunction with `config <set|get>`
command to specify the INI setting to get or set.
Available commands:
config list List Datadog's INI setting for the specified binaries.
config get Get INI setting for the specified binaries.
config set Set INI setting for the specified binaries.
EOD;
}
// phpcs:disable PSR1.Classes.ClassDeclaration.MissingNamespace
class IniRecord
{
/** @var string */
public $setting;
/** @var string */
public $currentValue;
/** @var string */
public $defaultValue;
/** @var string */
public $iniFile;
/** @var string */
public $binary;
public function println()
{
// phpcs:disable Generic.Files.LineLength.TooLong
echo "$this->setting = $this->currentValue; default: $this->defaultValue, binary: $this->binary, INI file: $this->iniFile\n";
// phpcs:disable Generic.Files.LineLength.TooLong
}
}
/**
* @param array $options
* @return array<string, IniRecord>
*/
function config_list(array $options)
{
$iniSettings = get_ini_settings('', '', '');
// The first 3 are 'extension' type of settings.
$iniSettings = array_slice($iniSettings, CMD_CONFIG_NUM_SHIFT);
// Build an index by unique names for filtering.
$indexByName = array_column($iniSettings, null, 'name');
$return = [];
foreach (require_binaries_or_exit($options) as $command => $fullPath) {
$binaryForLog = ($command === $fullPath) ? $fullPath : "$command ($fullPath)";
$iniFilePaths = find_all_ini_files(ini_values($fullPath));
foreach ($iniFilePaths as $iniFilePath) {
$iniFileSettings = parse_ini_file($iniFilePath, false, INI_SCANNER_RAW);
$settings = array_intersect_key($iniFileSettings, $indexByName);
foreach ($settings as $iniFileSetting => $currentValue) {
$iniSetting = $indexByName[$iniFileSetting];
$record = new IniRecord();
$record->setting = $iniFileSetting;
$record->currentValue = $currentValue;
$record->defaultValue = $iniSetting['default'];
$record->iniFile = $iniFilePath;
$record->binary = $binaryForLog;
$return[$record->setting] = $record;
}
}
}
return $return;
}
/**
* This function will print out all Datadog specific PHP INI settings. The list
* of Datadog specific settings is retrieved by calling `get_ini_settings()`. It
* will also show the default and INI file this setting was found.
* The output will be grouped by PHP binary, example:
*
* $ php datadog-setup.php config list --php-bin all
* Searching for available php binaries, this operation might take a while.
* datadog.profiling.enabled = On; default: 1, binary: /opt/php/8.2/bin/php, INI file: /opt/php/etc/conf.d/98-ddtrace.ini
* datadog.profiling.experimental_allocation_enabled = On; default: 1, binary: /opt/php/8.2/bin/php, INI file: /opt/php/etc/conf.d/98-ddtrace.ini
*
* @see get_ini_settings
* @return void
*/
function cmd_config_list(array $options)
{
foreach (config_list($options) as $record) {
$record->println();
}
}
/**
* This function will print the specified PHP INI settings. It only prints
* information for Datadog's own settings; it can't be used to parse opcache,
* xdebug, etc.
* The output will be grouped by PHP binary, example:
*
* $ php datadog-setup.php config get --php-bin all \
* -ddatadog.profiling.experimental_allocation_enabled \
* -ddatadog.profiling.experimental_cpu_time_enabled \
* -dnonexisting \
* -dopcache.preload
* datadog.profiling.experimental_allocation_enabled = On; binary: /opt/php/8.2/bin/php, INI file: /opt/php/etc/conf.d/98-ddtrace.ini
* datadog.profiling.experimental_cpu_time_enabled = On; binary: /opt/php/8.2/bin/php, INI file: /opt/php/etc/conf.d/98-ddtrace.ini
* nonexisting = undefined; is missing in INI files
* opcache.preload = undefined; is missing in INI files
* @return void
*/
function cmd_config_get(array $options)
{
if (!isset($options['d'])) {
print_help();
return;
}
/* A value could be set in multiple places:
* - /opt/php/8.1/etc/conf.d/98-ddtrace.ini
* - /opt/php/8.1/etc/conf.d/90-ddtrace-custom.ini
* So, a given setting like 'datadog.trace.enabled' is not necessarily
* unique in the iterator's keys.
*/
$records = [];
foreach (config_list($options) as $setting => $record) {
$records[$setting][] = $record;
}
foreach ($options['d'] as $iniSetting) {
if (!isset($records[$iniSetting])) {
echo '; ', $iniSetting, ' = undefined; is missing in INI files', PHP_EOL;
} else {
foreach ($records[$iniSetting] as $record) {
$record->println();
}
}
}
}
/**
* This function will set the given INI settings for any given PHP binary
*
* 1. Scan all INI files for for this INI setting and update if found (updates
* in all INI files in case it finds in multiple places and warns about the
* mess it found).
* 2. In case it could not find, it searches for commented out versions of this
* INI setting, uncomments it and updates the value. It first checks this in
* the "default" INI file (the one that holds the `extension = ddtrace` line,
* then others and only promotes the first commented version found.
* 3. In case this INI setting is not there yet it creates a new entry in the
* "default" INI file (see above).
*
* $ php datadog-setup.php config set --php-bin all \
* -ddatadog.profiling.experimental_allocation_enabled=On \
* -ddatadog.profiling.experimental_cpu_time_enabled=On \
* Setting configuration for binary: php (/opt/php/8.2/bin/php)
* Set 'datadog.profiling.experimental_allocation_enabled' to 'On' in INI file: /opt/php/etc/conf.d/98-ddtrace.ini
* Set 'datadog.profiling.experimental_cpu_time_enabled' to 'On' in INI file: /opt/php/etc/conf.d/98-ddtrace.ini
*/
function cmd_config_set(array $options)
{
if (!isset($options['d'])) {
print_help();
return;
}
$selectedBinaries = require_binaries_or_exit($options);
foreach ($selectedBinaries as $command => $fullPath) {
$binaryForLog = ($command === $fullPath) ? $fullPath : "$command ($fullPath)";
echo "Setting configuration for binary: $binaryForLog", PHP_EOL;
$phpProps = ini_values($fullPath);
foreach ($options['d'] as $cliIniSetting) {
if (($setting = parse_ini_setting($cliIniSetting)) === false) {
echo "The given INI setting '", $cliIniSetting,
"' can't be converted to a valid INI setting, skipping.", PHP_EOL;
continue;
}
$allIniFilePaths = find_all_ini_files($phpProps);
$matchCount = 0;
// look for INI setting in INI files
foreach ($allIniFilePaths as $iniFile) {
$count = update_ini_setting($setting, $iniFile, false);
if ($count === 0) {
continue;
}
if ($count === false) {
echo "Could not set '", $setting[0], "' to '", $setting[1],
"' in INI file: ", $iniFile , PHP_EOL;
continue;
}
echo "Set '", $setting[0], "' to '", $setting[1], "' in INI file: ", $iniFile, PHP_EOL;
$matchCount += $count;
}
if ($matchCount >= 1) {
// found and updated
if ($matchCount >= 2) {
echo "Warning: '$setting[0]' was found in multiple places, ",
"you might want to remove duplicates.", PHP_EOL;
}
continue;
}
// If we are here, we could not find the INI setting in any files, so
// we try and look for commented versions
$matchCount = 0;
// look for INI setting in INI files
foreach ($allIniFilePaths as $iniFile) {
$count = update_ini_setting($setting, $iniFile, true);
if ($count === 0) {
continue;
}
if ($count === false) {
echo "Could not set '", $setting[0], "' to '", $setting[1],
"' in INI file: ", $iniFile , PHP_EOL;
continue;
}
echo "Set '", $setting[0], "' to '", $setting[1], "' in INI file: ", $iniFile, PHP_EOL;
$matchCount += $count;
break;
}
if ($matchCount >= 1) {
// found, promoted from comment and updated
continue;
}
// Now we are here, meaning we could not find it, not in active nor in
// commented version, so we just add it to the default INI file(s)
$mainIniFilePaths = find_main_ini_files($phpProps);
$set = false;
foreach ($mainIniFilePaths as $iniFile) {
if (!file_exists($iniFile)) {
echo "File '$iniFile' does not exist. Trying to create it... ";
if (file_put_contents($iniFile, '') === false) {
echo "Could not set '{$setting[0]}' to '{$setting[1]}' in INI file: {$iniFile}.\n";
$directory = dirname($iniFile);
if (!is_dir($directory)) {
echo "Directory '$directory' doesn't exist. Create it and try again if you want to use '$iniFile'.\n";
}
continue;
} else {
echo "Success.\n";
}
}
$iniFileContent = file_get_contents($iniFile);
// check for "End of Line" symbol at the end of the file and
// add in case it is missing
if (strlen($iniFileContent) > 0 && substr($iniFileContent, -1, 1) !== PHP_EOL) {
$iniFileContent .= PHP_EOL;
}
$iniFileContent .= implode(' = ', $setting) . PHP_EOL;
if (file_put_contents($iniFile, $iniFileContent) === false) {
echo "Could not set '{$setting[0]}' to '{$setting[1]}' in INI file: {$iniFile}.\n";
continue;
}
echo "Set '{$setting[0]}' to '{$setting[1]}' in INI file: $iniFile.\n";
$set = true;
}
if (!$set) {
echo "Unable to set '{$setting[0]}' to '{$setting[1]}' in any INI file for $binaryForLog.\n";
exit(1);
}
}
}
}
/**
* Parse a given INI setting (from CLI) into an array and return it. It also tries
* to parse the new setting with `parse_ini_string()` to validate it is actually
* working
*
* @param string $setting
* @return false|array{0:string, 1:string}
*/
function parse_ini_setting($setting)
{
// `trim()` should not be needed, but better safe than sorry
$setting = array_map(
'trim',
explode(
'=',
$setting,
2
)
);
if (count($setting) !== 2) {
return false;
}
// safety: try out if parsing the generated ini setting is actually possible
if (parse_ini_string($setting[0] . '=' . $setting[1], false, INI_SCANNER_RAW) === false) {
return false;
}
return $setting;
}
/**
* This function will try and update a given `$setting` in the INI file given in
* `$iniFile`. First it tries to find an uncommented version of the setting in
* the file and replace this with the new value. In case no uncommented version
* was found it tries to find commented versions of this INI setting.
*
* In case `$promoteComment` is set to `true`, this function will replace and
* therefore promote only the first occurrence it finds from a comment to an INI
* setting in the given `$iniFile`.
*
* @param array{0: string, 1: string} $setting
* @param string $iniFile
* @param bool $promoteComment
* @return false|int
*/
function update_ini_setting($setting, $iniFile, $promoteComment)
{
$iniFileContent = file_get_contents($iniFile);
if ($promoteComment) {
$regex = '/^[\h;]*' . preg_quote($setting[0]) . '\h*=\h*?[^;\n\r]*/mi';
} else {
$regex = '/^\h*' . preg_quote($setting[0]) . '\h*=\h*?[^;\n\r]*/mi';
}
$count = 0;
$iniFileContent = preg_replace($regex, implode(' = ', $setting), $iniFileContent, $promoteComment ? 1 : -1, $count);
if ($iniFileContent === null) {
// something wrong with the regex, the user should see a warning
// in the form of "Warning: preg_replace(): Compilation failed ..."
return false;
}
if ($count > 0) {
if (file_put_contents($iniFile, $iniFileContent) === false) {
return false;
}
}
return $count;
}
function install($options)
{
$architecture = get_architecture();
$platform = "$architecture-" . (IS_WINDOWS ? "windows" : "linux-" . (is_alpine() ? 'musl' : 'gnu'));
// Checking required libraries
check_library_prerequisite_or_exit('libcurl');
check_library_prerequisite_or_exit('libgcc_s');
if (!is_alpine()) {
if (is_truthy($options[OPT_ENABLE_PROFILING])) {
check_library_prerequisite_or_exit('libdl.so');
check_library_prerequisite_or_exit('libpthread');
check_library_prerequisite_or_exit('librt');
}
}
// Picking the right binaries to install the library
$selectedBinaries = require_binaries_or_exit($options);
$interactive = empty($options[OPT_PHP_BIN]);
$commandExtensionSuffixes = [];
$downloadVersions = [];
foreach ($selectedBinaries as $command => $fullPath) {
$binaryForLog = ($command === $fullPath) ? $fullPath : "$command ($fullPath)";
echo "Checking for binary: $binaryForLog\n";
check_php_ext_prerequisite_or_exit($fullPath, 'json');
$phpProperties = ini_values($fullPath);
if (!isset($phpProperties[INI_SCANDIR])) {
if (!isset($phpProperties[INI_MAIN])) {
if (IS_WINDOWS) {
$phpProperties[INI_MAIN] = dirname($fullPath) . "/php.ini";
} else {
print_error_and_exit(
"It is not possible to perform installation on this "
. "system because there is no scan directory and no "
. "configuration file loaded."
);
}
}
print_warning(
"Performing an installation without a scan directory may "
. "result in fragile installations that are broken by normal "
. "system upgrades. It is advisable to use the configure "
. "switch --with-config-file-scan-dir when building PHP."
);
}
// Suffix (zts/debug)
$extensionSuffix = '';
if (is_truthy($phpProperties[IS_DEBUG])) {
$extensionSuffix .= '-debug';
}
if (is_truthy($phpProperties[THREAD_SAFETY])) {
$extensionSuffix .= '-zts';
}
$commandExtensionSuffixes[$command] = $extensionSuffix;
$extensionVersion = $phpProperties[PHP_API];
$downloadVersions["$extensionVersion$extensionSuffix"] = true;
}
$tar_gz_suffix = "";
if (count($downloadVersions) === 1) {
$tar_gz_suffix = "-" . key($downloadVersions);
}
// Preparing clean tmp folder to extract files
$tmpDir = sys_get_temp_dir() . '/dd-install';
$tmpArchiveRoot = $tmpDir . '/dd-library-php';
$tmpArchiveTraceRoot = $tmpDir . '/dd-library-php/trace';
$tmpArchiveAppsecRoot = $tmpDir . '/dd-library-php/appsec';
$tmpArchiveAppsecLib = "{$tmpArchiveAppsecRoot}/lib";
$tmpArchiveAppsecEtc = "{$tmpArchiveAppsecRoot}/etc";
$tmpArchiveProfilingRoot = $tmpDir . '/dd-library-php/profiling';
$tmpSrcDir = $tmpArchiveTraceRoot . '/src';
if (!file_exists($tmpDir)) {
execute_or_exit("Cannot create directory '$tmpDir'", "mkdir " . (IS_WINDOWS ? "" : "-p ") . escapeshellarg($tmpDir));
}
register_shutdown_function(function () use ($tmpDir) {
execute_or_exit("Cannot remove temporary directory '$tmpDir'", (IS_WINDOWS ? "rd /s /q " : "rm -rf ") . escapeshellarg($tmpDir));
});
if (!IS_WINDOWS) {
execute_or_exit(
"Cannot clean '$tmpDir'",
"rm -rf " . escapeshellarg($tmpDir) . "/* "
);
}
// Retrieve and extract the archive to a tmp location
if (isset($options[OPT_FILE])) {
print_warning('--' . OPT_FILE . ' option is intended for internal usage and can be removed without notice');
$tmpDirTarGz = $options[OPT_FILE];
} else {
for (;;) {
$url = RELEASE_URL_PREFIX . "dd-library-php-" . RELEASE_VERSION . "-{$platform}{$tar_gz_suffix}.tar.gz";
$tmpDirTarGz = $tmpDir . "/dd-library-php-{$platform}{$tar_gz_suffix}.tar.gz";
if (download($url, $tmpDirTarGz, $tar_gz_suffix != "")) {
break;
}
$tar_gz_suffix = ""; // retry with the full archive if the original download failed
}
}
if (!IS_WINDOWS || `where tar 2> nul` !== null) {
execute_or_exit(
"Cannot extract the archive",
"tar -xf " . escapeshellarg($tmpDirTarGz) . " -C " . escapeshellarg($tmpDir)
);
} elseif (($defaultPath = `where 7z 2> nul`) !== null || @is_dir($installDir7z = getenv("PROGRAMFILES") . "\\7-Zip")) {
if ($defaultPath === null) {
putenv("PATH=" . getenv("PATH") . ";$installDir7z");
}
execute_or_exit(
"Cannot extract the archive",
"7z x " . escapeshellarg($tmpDirTarGz) . " -so | 7z x -aoa -si -ttar -o" . escapeshellarg($tmpDir)
);
} else {
die("ERROR: neither tar nor 7z are installed and available in %PATH%. Please install either to continue the installation.\n");
}
$releaseVersion = trim(file_get_contents("$tmpArchiveRoot/VERSION"));
$installDir = $options[OPT_INSTALL_DIR] . '/' . $releaseVersion;
// Tracer sources
$installDirSourcesDir = $installDir . '/dd-trace-sources';
$installDirSrcDir = $installDirSourcesDir . '/src';
// copying sources to the final destination
if (!file_exists($installDirSourcesDir)) {
execute_or_exit(
"Cannot create directory '$installDirSourcesDir'",
"mkdir " . (IS_WINDOWS ? "" : "-p ") . escapeshellarg($installDirSourcesDir)
);
}
execute_or_exit(
"Cannot copy files from '$tmpSrcDir' to '$installDirSourcesDir'",
(IS_WINDOWS ? "echo d | xcopy /s /e /y /g /b /o /h " : "cp -r ") . escapeshellarg("$tmpSrcDir") . ' ' . escapeshellarg($installDirSrcDir)
);
echo "Installed required source files to '$installDir'\n";
// Appsec helper and rules
if (file_exists($tmpArchiveAppsecRoot)) {
execute_or_exit(
"Cannot copy files from '$tmpArchiveAppsecLib' to '$installDir'",
(IS_WINDOWS ? "xcopy /s /e /y /g /b /o /h " : "cp -rf ") . escapeshellarg("$tmpArchiveAppsecLib") . ' ' . escapeshellarg($installDir)
);
execute_or_exit(
"Cannot copy files from '$tmpArchiveAppsecEtc' to '$installDir'",
(IS_WINDOWS ? "xcopy /s /e /y /g /b /o /h " : "cp -r ") . escapeshellarg("$tmpArchiveAppsecEtc") . ' ' . escapeshellarg($installDir)
);
}
$appSecRulesPath = $installDir . '/etc/recommended.json';
// Actual installation
foreach ($selectedBinaries as $command => $fullPath) {
$binaryForLog = ($command === $fullPath) ? $fullPath : "$command ($fullPath)";
echo "Installing to binary: $binaryForLog\n";
check_php_ext_prerequisite_or_exit($fullPath, 'json');
$phpProperties = ini_values($fullPath);
if (!isset($phpProperties[INI_SCANDIR])) {
if (!isset($phpProperties[INI_MAIN])) {
if (IS_WINDOWS) {
$phpProperties[INI_MAIN] = dirname($fullPath) . "/php.ini";
} else {
print_error_and_exit(
"It is not possible to perform installation on this "
. "system because there is no scan directory and no "
. "configuration file loaded."
);
}
}
print_warning(
"Performing an installation without a scan directory may "
. "result in fragile installations that are broken by normal "
. "system upgrades. It is advisable to use the configure "
. "switch --with-config-file-scan-dir when building PHP."
);
}
// Copying the extension
$extensionVersion = $phpProperties[PHP_API];
$extensionSuffix = $commandExtensionSuffixes[$command];
$extDir = isset($options[OPT_EXTENSION_DIR]) ? $options[OPT_EXTENSION_DIR] : $phpProperties[EXTENSION_DIR];
echo "Installing extension to $extDir\n";
// Trace
$extensionRealPath = "$tmpArchiveTraceRoot/ext/$extensionVersion/"
. EXTENSION_PREFIX . "ddtrace$extensionSuffix." . EXTENSION_SUFFIX;
if (!file_exists($extensionRealPath)) {
print_error_and_exit(substr($extensionSuffix ?: '-nts', 1)
. ' builds of PHP ' . $phpProperties[PHP_VER] . ' are currently not supported');
}
$extensionDestination = $extDir . '/' . EXTENSION_PREFIX . 'ddtrace.' . EXTENSION_SUFFIX;
safe_copy_extension($extensionRealPath, $extensionDestination);
// Profiling
$profilingExtensionRealPath = "$tmpArchiveProfilingRoot/ext/$extensionVersion/"
. EXTENSION_PREFIX . "datadog-profiling$extensionSuffix." . EXTENSION_SUFFIX;
$shouldInstallProfiling = file_exists($profilingExtensionRealPath);
if ($shouldInstallProfiling) {
$profilingExtensionDestination = $extDir . '/' . EXTENSION_PREFIX . 'datadog-profiling.' . EXTENSION_SUFFIX;
safe_copy_extension($profilingExtensionRealPath, $profilingExtensionDestination);
}
// Appsec
$appsecExtensionRealPath = "{$tmpArchiveAppsecRoot}/ext/{$extensionVersion}/"
. EXTENSION_PREFIX . "ddappsec{$extensionSuffix}." . EXTENSION_SUFFIX;
$shouldInstallAppsec = file_exists($appsecExtensionRealPath);
if ($shouldInstallAppsec) {
$appsecExtensionDestination = $extDir . '/' . EXTENSION_PREFIX . 'ddappsec.' . EXTENSION_SUFFIX;
safe_copy_extension($appsecExtensionRealPath, $appsecExtensionDestination);
}
$appSecHelperPath = $installDir . '/lib/libddappsec-helper.so';
if (isset($options[OPT_PHP_INI])) {
$iniFilePaths = $options[OPT_PHP_INI];
} else {
$iniFilePaths = find_main_ini_files($phpProperties);
}
foreach ($iniFilePaths as $iniFilePath) {
$replacements = [];
if (!file_exists($iniFilePath)) {
$iniDir = dirname($iniFilePath);
if (!file_exists($iniDir)) {
execute_or_exit(
"Cannot create directory '$iniDir'",
"mkdir " . (IS_WINDOWS ? "" : "-p ") . escapeshellarg($iniDir)
);
}
if (false === file_put_contents($iniFilePath, '')) {
print_error_and_exit("Cannot create INI file $iniFilePath");
}
echo "Created INI file '$iniFilePath'\n";
} else {
echo "Updating existing INI file '$iniFilePath'";
if (is_link($iniFilePath)) {
$iniFilePath = readlink($iniFilePath);
echo " which is a symlink to '$iniFilePath'";
}
echo "\n";
$replacements += [
// Old name is deprecated
'(ddtrace\.request_init_hook)' => 'datadog.trace.sources_path',
'(datadog\.trace\.request_init_hook)' => 'datadog.trace.sources_path',
'((datadog\.trace\.sources_path)\s*=\s*.*)' => "$1 = $installDirSrcDir",
];
}
if (isset($options[OPT_EXTENSION_DIR])) {
$replacements += [
'(^\s*;?\s*extension\s*=\s*.*ddtrace.*)m' => "extension = $extensionDestination",
];
} else {
$replacements += [
/* In order to support upgrading from legacy installation method to new installation method, we
* replace "extension = /opt/datadog-php/xyz.so" with "extension = ddtrace.so" honoring trailing
* `;`, hence not automatically re-activating the extension if the user had commented it out.
*/
'(^\s*;?\s*extension\s*=\s*.*ddtrace.*)m' => "extension = ddtrace" . (IS_WINDOWS ? "" : "." . EXTENSION_SUFFIX),
// Support upgrading from the C based zend_extension.
'(zend_extension\s*=\s*.*datadog-profiling.*)' => "extension = datadog-profiling" . (IS_WINDOWS ? "" : "." . EXTENSION_SUFFIX),
];
}
// Enabling profiling
if (is_truthy($options[OPT_ENABLE_PROFILING])) {
// phpcs:disable Generic.Files.LineLength.TooLong
if ($shouldInstallProfiling) {
if (isset($options[OPT_EXTENSION_DIR])) {
$replacements['(zend_extension\s*=\s*.*datadog-profiling.*)'] = "extension = $profilingExtensionDestination";
$replacements['(^\s*;?\s*extension\s*=\s*.*datadog-profiling.*)m'] = "extension = $profilingExtensionDestination";
} else {
$replacements['(^\s*;?\s*extension\s*=\s*.*datadog-profiling.*)m'] = "extension = datadog-profiling" . (IS_WINDOWS ? "" : "." . EXTENSION_SUFFIX);
}
} else {
$enableProfiling = OPT_ENABLE_PROFILING;
print_error_and_exit(
"Option --{$enableProfiling} was provided, but it is not supported on this PHP build or version.\n"
);
}
// phpcs:enable Generic.Files.LineLength.TooLong
}
// Load AppSec and enable/disable as required
// phpcs:disable Generic.Files.LineLength.TooLong
if ($shouldInstallAppsec) {
$rulesPathRegex = preg_quote($options[OPT_INSTALL_DIR]) . "/[0-9\.]*/etc/recommended.json";
$iniAppsecExtension = isset($options[OPT_EXTENSION_DIR])
? $appsecExtensionDestination
: ("ddappsec" . (IS_WINDOWS ? "" : "." . EXTENSION_SUFFIX));
$replacements += [
'(^\s*;?\s*extension\s*=\s*.*ddappsec.*)m' => "extension = $iniAppsecExtension",
// Update helper path
'(datadog.appsec.helper_path\s*=.*)' => "datadog.appsec.helper_path = $appSecHelperPath",
// Update and comment rules path
'(^[\s;]*datadog.appsec.rules\s*=\s*' . $rulesPathRegex . ')m' => "; datadog.appsec.rules = " . $appSecRulesPath,
];
if (is_truthy($options[OPT_ENABLE_APPSEC])) {
$replacements += ['(^[\s;]*datadog.appsec.enabled\s*=.*)m' => 'datadog.appsec.enabled = On'];
}
} else {
// Ensure AppSec isn't loaded if not compatible
$replacements['(^[\s;]*extension\s*=\s*.*ddappsec.*)m'] = "; extension = ddappsec" . (IS_WINDOWS ? "" : "." . EXTENSION_SUFFIX);
if (is_truthy($options[OPT_ENABLE_APPSEC])) {
$enableAppsec = OPT_ENABLE_APPSEC;
print_error_and_exit(
"Option --{$enableAppsec} was provided, but it is not supported on this PHP build or version.\n"
);
}
}
add_missing_ini_settings(
$iniFilePath,
get_ini_settings($installDirSrcDir, $appSecHelperPath, $appSecRulesPath),
$replacements
);
// phpcs:enable Generic.Files.LineLength.TooLong
echo "Installation to '$binaryForLog' was successful\n";
}
}
echo "--------------------------------------------------\n";
echo "SUCCESS\n\n";
if ($interactive) {
echo "To run this script in a non interactive mode, use the following options:\n";
$args = array_merge(
$_SERVER["argv"],
array_map(
function ($el) {
return '--php-bin=' . $el;
},
array_keys($selectedBinaries)
)
);
echo " php " . implode(" ", array_map("escapeshellarg", $args)) . "\n";
}
}
/**
* Returns a list of all INI files found for the `$phpProperties` given.
*
* Does so by scanning the INI scan directory for `.ini` files. Additionally we
* check if we are running on a Debian based distribution so we assume the INI
* files are split by SAPI, so we try and add the Apache SAPI INI files as
* well. In case it exists, we also add the default `php.ini` file to the list.
*
* The returned array is somewhat sorted to have the "default" INI file for
* Datadog (`98-ddtrace.ini`) in the beginning of the array.
*
* @see ini_values
* @return string[]
*/
function find_all_ini_files(array $phpProperties)
{
$iniFilePaths = [];
$addIniFiles = function ($path) use (&$iniFilePaths) {
if (!is_dir($path)) {
return;
}
foreach (scandir($path) as $ini) {
if (!is_file($path . '/' . $ini) || substr($ini, -4) !== '.ini') {
continue;
}
$iniFile = $path . '/' . $ini;
if (strpos($ini, '98-ddtrace.ini') !== false) {
array_unshift($iniFilePaths, $iniFile);
} else {
$iniFilePaths[] = $iniFile;
}
}
};
if ($phpProperties[INI_SCANDIR]) {
$addIniFiles($phpProperties[INI_SCANDIR]);
if (strpos($phpProperties[INI_SCANDIR], '/cli/conf.d') !== false) {
/* debian based distros have INI folders split by SAPI, in a predefined way:
* - <...>/cli/conf.d <-- we know this from php -i
* - <...>/apache2/conf.d <-- we derive this from relative path
* - <...>/fpm/conf.d <-- we derive this from relative path
*/
$apacheConfd = str_replace('/cli/conf.d', '/apache2/conf.d', $phpProperties[INI_SCANDIR]);
$addIniFiles($apacheConfd);
}
}
if (isset($phpProperties[INI_MAIN]) && is_file($phpProperties[INI_MAIN])) {
$iniFilePaths = [$phpProperties[INI_MAIN]];
}
return $iniFilePaths;
}
/**
* This function will find the main INI file(s) for the given `$phpProperties`.
*
* The "main" or "default" INI file is either a `98-ddtrace.ini` file or
* another INI file that loads the extension (or rephrasing this as: the file
* the has the `extension = ddtrace` line in it).
*
* In most cases this function will return an array with exactly one element,
* only in case we detect a Debian based distribution, it might contain two
* elements, as debian based distributions split the INI folders based on SAPI
* and we include those as well.
*
* The `$phpProperties` can be retrieved by calling `ini_values($pathToPHPBinary)`.
*
* @see ini_values
* @return string[]
*/
function find_main_ini_files(array $phpProperties)
{
if (isset($phpProperties[INI_SCANDIR])) {
$pos = strpos($phpProperties[INI_SCANDIR], \PATH_SEPARATOR);
if ($pos !== false) {
// https://www.php.net/manual/en/configuration.file.php#configuration.file.scandir
$phpProperties[INI_SCANDIR] = current(array_filter(explode(\PATH_SEPARATOR, $phpProperties[INI_SCANDIR])));
}
$iniFileName = '98-ddtrace.ini';
// Search for pre-existing files with extension = ddtrace.so to avoid conflicts
// See issue https://github.com/DataDog/dd-trace-php/issues/1833
if (is_dir($phpProperties[INI_SCANDIR])) {
foreach (scandir($phpProperties[INI_SCANDIR]) as $ini) {
$path = "{$phpProperties[INI_SCANDIR]}/$ini";
if (is_file($path)) {
// match /path/to/ddtrace.so, plain extension = ddtrace or future extensions like ddtrace.dll
if (preg_match("(^\s*extension\s*=\s*(\S*ddtrace)\b)m", file_get_contents($path), $res)) {
if (basename($res[1]) == "ddtrace") {
$iniFileName = $ini;
}
}
}
}
}
$iniFilePaths = [$phpProperties[INI_SCANDIR] . '/' . $iniFileName];
if (strpos($phpProperties[INI_SCANDIR], '/cli/conf.d') !== false) {
/* debian based distros have INI folders split by SAPI, in a predefined way:
* - <...>/cli/conf.d <-- we know this from php -i
* - <...>/apache2/conf.d <-- we derive this from relative path
* - <...>/fpm/conf.d <-- we derive this from relative path
*/
$apacheConfd = str_replace('/cli/conf.d', '/apache2/conf.d', $phpProperties[INI_SCANDIR]);
if (is_dir($apacheConfd)) {
$iniFilePaths[] = "$apacheConfd/$iniFileName";
}
}
} else {
$iniFileName = $phpProperties[INI_MAIN];
$iniFilePaths = [$iniFileName];
}
return $iniFilePaths;
}
/**
* Copies an extension's file to a destination using copy+rename to avoid segfault if the file is loaded by php.
*
* @param string $source
* @param string $destination
* @return void
*/
function safe_copy_extension($source, $destination)
{
/* Move - rename() - instead of copy() since copying does a fopen() and copies to the stream itself, causing a
* segfault in the PHP process that is running and had loaded the old shared object file.
*/
if (IS_WINDOWS && file_exists($destination)) {
// We have to blackhole it in tempdir because it is likely currently loaded and may not be replaced in place.
rename($destination, getenv("TEMP") . "\\" . time() . "-" . basename($destination));
}
$destinationDir = dirname($destination);
if (!file_exists($destinationDir)) {
execute_or_exit(
"Cannot create directory '$destinationDir'",
"mkdir " . (IS_WINDOWS ? "" : "-p ") . escapeshellarg($destinationDir)
);
}
$tmpName = $destination . '.tmp';
copy($source, $tmpName);
rename($tmpName, $destination);
echo "Copied '$source' to '$destination'\n";
}
function uninstall($options)
{
$selectedBinaries = require_binaries_or_exit($options);
foreach ($selectedBinaries as $command => $fullPath) {
$binaryForLog = ($command === $fullPath) ? $fullPath : "$command ($fullPath)";
echo "Uninstalling from binary: $binaryForLog\n";
$phpProperties = ini_values($fullPath);
$extensionDir = isset($options[OPT_EXTENSION_DIR]) ? $options[OPT_EXTENSION_DIR] : $phpProperties[EXTENSION_DIR];
$extensionDestinations = [
$extensionDir . '/' . EXTENSION_PREFIX . 'ddtrace.' . EXTENSION_SUFFIX,
$extensionDir . '/' . EXTENSION_PREFIX . 'datadog-profiling.' . EXTENSION_SUFFIX,
$extensionDir . '/' . EXTENSION_PREFIX . 'ddappsec.' . EXTENSION_SUFFIX,
];
$iniFileName = '98-ddtrace.ini';
if (isset($phpProperties[INI_SCANDIR])) {
$iniFilePaths = [$phpProperties[INI_SCANDIR] . '/' . $iniFileName];
if (strpos('/cli/conf.d', $phpProperties[INI_SCANDIR]) >= 0) {
/* debian based distros have INI folders split by SAPI, in a predefined way:
* - <...>/cli/conf.d <-- we know this from php -i
* - <...>/apache2/conf.d <-- we derive this from relative path
* - <...>/fpm/conf.d <-- we derive this from relative path
*/
$apacheConfd = str_replace('/cli/conf.d', '/apache2/conf.d', $phpProperties[INI_SCANDIR]);
if (is_dir($apacheConfd)) {
$iniFilePaths[] = "$apacheConfd/$iniFileName";
}
}
} else {
if (!isset($phpProperties[INI_MAIN])) {
print_error_and_exit(
"It is not possible to perform uninstallation on this "
. "system because there is no scan directory and no "
. "configuration file loaded."
);
}
$iniFilePaths = [$phpProperties[INI_MAIN]];
}
/* Actual uninstall
* 1) comment out extension=ddtrace.so
* 2) remove ddtrace.so
*/