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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_API = 'PHP API';
const IS_DEBUG = 'Debug Build';
// Options
const OPT_HELP = 'help';
const OPT_INSTALL_DIR = 'install-dir';
const OPT_PHP_BIN = 'php-bin';
const OPT_FILE = 'file';
const OPT_UNINSTALL = 'uninstall';
const OPT_ENABLE_APPSEC = 'enable-appsec';
const OPT_ENABLE_PROFILING = 'enable-profiling';
// Release version is set while generating the final release files
const RELEASE_VERSION = '@release_version@';
function main()
{
if (is_truthy(getenv('DD_TEST_EXECUTION'))) {
return;
}
$options = parse_validate_user_options();
if ($options[OPT_UNINSTALL]) {
uninstall($options);
} else {
install($options);
}
}
function print_help()
{
echo <<<EOD
Usage:
Interactive
php datadog-setup.php ...
Non-Interactive
php datadog-setup.php --php-bin php ...
php datadog-setup.php --php-bin php --php-bin /usr/local/sbin/php-fpm ...
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: '/opt/datadog'
--uninstall Uninstall the library from the specified binaries
--enable-appsec Enable the application security monitoring module.
--enable-profiling Enable the BETA profiling module.
EOD;
}
function install($options)
{
$architecture = get_architecture();
$platform = "$architecture-linux-" . (is_alpine() ? 'musl' : 'gnu');
// Checking required libraries
check_library_prerequisite_or_exit('libcurl');
if (is_alpine()) {
if (is_truthy($options[OPT_ENABLE_PROFILING])) {
check_library_prerequisite_or_exit('libgcc_s');
}
} else {
if (is_truthy($options[OPT_ENABLE_PROFILING])) {
check_library_prerequisite_or_exit('libdl.so');
check_library_prerequisite_or_exit('libgcc_s');
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]);
// Preparing clean tmp folder to extract files
$tmpDir = sys_get_temp_dir() . '/dd-install';
$tmpDirTarGz = $tmpDir . "/dd-library-php-{$platform}.tar.gz";
$tmpArchiveRoot = $tmpDir . '/dd-library-php';
$tmpArchiveTraceRoot = $tmpDir . '/dd-library-php/trace';
$tmpArchiveAppsecRoot = $tmpDir . '/dd-library-php/appsec';
$tmpArchiveAppsecBin = "{$tmpArchiveAppsecRoot}/bin";
$tmpArchiveAppsecEtc = "{$tmpArchiveAppsecRoot}/etc";
$tmpArchiveProfilingRoot = $tmpDir . '/dd-library-php/profiling';
$tmpBridgeDir = $tmpArchiveTraceRoot . '/bridge';
execute_or_exit("Cannot create directory '$tmpDir'", "mkdir -p " . escapeshellarg($tmpDir));
register_shutdown_function(function () use ($tmpDir) {
execute_or_exit("Cannot remove temporary directory '$tmpDir'", "rm -rf " . escapeshellarg($tmpDir));
});
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 {
$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.
$url = (getenv('DD_TEST_INSTALLER_REPO') ?: "https://github.com/DataDog/dd-trace-php")
. "/releases/download/{$version}/dd-library-php-{$version}-{$platform}.tar.gz";
// phpcs:enable Generic.Files.LineLength.TooLong
download($url, $tmpDirTarGz);
unset($version);
}
execute_or_exit(
"Cannot extract the archive",
"tar -xf " . escapeshellarg($tmpDirTarGz) . " -C " . escapeshellarg($tmpDir)
);
$releaseVersion = trim(file_get_contents("$tmpArchiveRoot/VERSION"));
$installDir = $options[OPT_INSTALL_DIR] . '/' . $releaseVersion;
// Tracer sources
$installDirSourcesDir = $installDir . '/dd-trace-sources';
$installDirBridgeDir = $installDirSourcesDir . '/bridge';
$installDirWrapperPath = $installDirBridgeDir . '/dd_wrap_autoloader.php';
// copying sources to the final destination
execute_or_exit(
"Cannot create directory '$installDirSourcesDir'",
"mkdir -p " . escapeshellarg($installDirSourcesDir)
);
execute_or_exit(
"Cannot copy files from '$tmpBridgeDir' to '$installDirSourcesDir'",
"cp -r " . escapeshellarg("$tmpBridgeDir") . ' ' . escapeshellarg($installDirSourcesDir)
);
echo "Installed required source files to '$installDir'\n";
// Appsec helper and rules
if (file_exists($tmpArchiveAppsecRoot)) {
execute_or_exit(
"Cannot copy files from '$tmpArchiveAppsecBin' to '$installDir'",
"cp -rf " . escapeshellarg("$tmpArchiveAppsecBin") . ' ' . escapeshellarg($installDir)
);
execute_or_exit(
"Cannot copy files from '$tmpArchiveAppsecEtc' to '$installDir'",
"cp -r " . escapeshellarg("$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";
$phpMajorMinor = get_php_major_minor($fullPath);
check_php_ext_prerequisite_or_exit($fullPath, 'json');
$phpProperties = ini_values($fullPath);
if (!isset($phpProperties[INI_SCANDIR])) {
if (!isset($phpProperties[INI_MAIN])) {
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];
// Suffix (zts/debug/alpine)
$extensionSuffix = '';
if (is_truthy($phpProperties[IS_DEBUG])) {
$extensionSuffix .= '-debug';
}
if (is_truthy($phpProperties[THREAD_SAFETY])) {
$extensionSuffix .= '-zts';
}
// Trace
$extensionRealPath = "$tmpArchiveTraceRoot/ext/$extensionVersion/ddtrace$extensionSuffix.so";
if (!file_exists($extensionRealPath)) {
print_error_and_exit(substr($extensionSuffix ?: '-nts', 1) . ' builds of PHP are currently not supported');
}
$extensionDestination = $phpProperties[EXTENSION_DIR] . '/ddtrace.so';
safe_copy_extension($extensionRealPath, $extensionDestination);
// Profiling
// phpcs:disable Generic.Files.LineLength.TooLong
$profilingExtensionRealPath = "$tmpArchiveProfilingRoot/ext/$extensionVersion/datadog-profiling$extensionSuffix.so";
// phpcs:enable Generic.Files.LineLength.TooLong
$shouldInstallProfiling = file_exists($profilingExtensionRealPath);
if ($shouldInstallProfiling) {
$profilingExtensionDestination = $phpProperties[EXTENSION_DIR] . '/datadog-profiling.so';
safe_copy_extension($profilingExtensionRealPath, $profilingExtensionDestination);
}
// Appsec
$appsecExtensionRealPath = "{$tmpArchiveAppsecRoot}/ext/{$extensionVersion}/ddappsec{$extensionSuffix}.so";
$shouldInstallAppsec = file_exists($appsecExtensionRealPath);
if ($shouldInstallAppsec) {
$appsecExtensionDestination = $phpProperties[EXTENSION_DIR] . '/ddappsec.so';
safe_copy_extension($appsecExtensionRealPath, $appsecExtensionDestination);
}
$appSecHelperPath = $installDir . '/bin/ddappsec-helper';
// Writing the ini file
if ($phpProperties[INI_SCANDIR]) {
$iniFileName = '98-ddtrace.ini';
// Search for pre-existing files with extension = ddtrace.so to avoid conflicts
// See issue https://github.com/DataDog/dd-trace-php/issues/1833
foreach (scandir($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)) {
array_push($iniFilePaths, "$apacheConfd/$iniFileName");
}
}
} else {
$iniFileName = $phpProperties[INI_MAIN];
$iniFilePaths = [$iniFileName];
}
foreach ($iniFilePaths as $iniFilePath) {
if (!file_exists($iniFilePath)) {
$iniDir = dirname($iniFilePath);
execute_or_exit(
"Cannot create directory '$iniDir'",
"mkdir -p " . escapeshellarg($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 '$iniFilePath'\n";
// phpcs:disable Generic.Files.LineLength.TooLong
execute_or_exit(
'Impossible to replace the deprecated ddtrace.request_init_hook parameter with the new name.',
"sed -i 's|ddtrace.request_init_hook|datadog.trace.request_init_hook|g' "
. escapeshellarg($iniFilePath)
);
execute_or_exit(
'Impossible to update the INI settings file.',
"sed -i 's@datadog\.trace\.request_init_hook \?= \?\(.*\)@datadog.trace.request_init_hook = '"
. escapeshellarg($installDirWrapperPath)
. "'@g' " . escapeshellarg($iniFilePath)
);
// phpcs:enable Generic.Files.LineLength.TooLong
/* 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.
*/
execute_or_exit(
'Impossible to update the INI settings file.',
"sed -i 's@ \?;\? \?extension \?= \?.*ddtrace.*\(.*\)@extension = ddtrace.so@g' "
. escapeshellarg($iniFilePath)
);
// Support upgrading from the C based zend_extension.
execute_or_exit(
'Impossible to update the INI settings file.',
"sed -i 's@zend_extension \?= \?.*datadog-profiling.*\(.*\)@extension = datadog-profiling.so@g' "
. escapeshellarg($iniFilePath)
);
}
add_missing_ini_settings(
$iniFilePath,
get_ini_settings($installDirWrapperPath, $appSecHelperPath, $appSecRulesPath)
);
// Enabling profiling
if (is_truthy($options[OPT_ENABLE_PROFILING])) {
// phpcs:disable Generic.Files.LineLength.TooLong
if ($shouldInstallProfiling) {
execute_or_exit(
'Impossible to update the INI settings file.',
"sed -i 's@ \?; \?extension \?= \?datadog-profiling.so@extension = datadog-profiling.so@g' "
. escapeshellarg($iniFilePath)
);
} 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 ($shouldInstallAppsec) {
execute_or_exit(
'Impossible to update the INI settings file.',
"sed -i 's@ \?; \?extension \?= \?ddappsec.so@extension = ddappsec.so@g' "
. escapeshellarg($iniFilePath)
);
if (is_truthy($options[OPT_ENABLE_APPSEC])) {
execute_or_exit(
'Impossible to update the INI settings file.',
"sed -i '[email protected] \?=.*$\[email protected] = On@g' "
. escapeshellarg($iniFilePath)
);
} else {
execute_or_exit(
'Impossible to update the INI settings file.',
"sed -i '[email protected] \?=.*$\[email protected] = Off@g' "
. escapeshellarg($iniFilePath)
);
}
} else {
// Ensure AppSec isn't loaded if not compatible
execute_or_exit(
'Impossible to update the INI settings file.',
"sed -i 's@extension \?= \?ddappsec.so@;extension = ddappsec.so@g' "
. escapeshellarg($iniFilePath)
);
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"
);
}
}
// 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";
}
}
/**
* 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.
*/
$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);
$extensionDestinations = [
$phpProperties[EXTENSION_DIR] . '/ddtrace.so',
$phpProperties[EXTENSION_DIR] . '/datadog-profiling.so',
$phpProperties[EXTENSION_DIR] . '/ddappsec.so',
];
if (isset($phpProperties[INI_SCANDIR])) {
$iniFileName = '98-ddtrace.ini';
$iniFilePaths = [$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)) {
array_push($iniFilePaths, "$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
*/
foreach ($iniFilePaths as $iniFilePath) {
if (file_exists($iniFilePath)) {
execute_or_exit(
"Impossible to disable PHP modules from '$iniFilePath'. You can disable them manually.",
"sed -i 's@^extension \?=@;extension =@g' " . escapeshellarg($iniFilePath)
);
execute_or_exit(
"Impossible to disable Zend modules from '$iniFilePath'. You can disable them manually.",
"sed -i 's@^zend_extension \?=@;zend_extension =@g' " . escapeshellarg($iniFilePath)
);
echo "Disabled all modules in INI file '$iniFilePath'. "
. "The file has not been removed to preserve custom settings.\n";
}
}
$errors = false;
foreach ($extensionDestinations as $extensionDestination) {
if (file_exists($extensionDestination) && false === unlink($extensionDestination)) {
print_warning("Error while removing $extensionDestination. It can be manually removed.");
$errors = true;
}
}
if ($errors) {
echo "Uninstall from '$binaryForLog' was completed with warnings\n";
} else {
echo "Uninstall from '$binaryForLog' was successful\n";
}
}
}
/**
* Returns a list of php binaries where the library will be installed. If not explicitly provided by the CLI options,
* then the list is retrieved using an interactive session.
*
* @param array $options
* @return array
*/
function require_binaries_or_exit($options)
{
$selectedBinaries = [];
if (empty($options[OPT_PHP_BIN])) {
$selectedBinaries = pick_binaries_interactive($options, search_php_binaries());
} else {
foreach ($options[OPT_PHP_BIN] as $command) {
if ($command == "all") {
foreach (search_php_binaries() as $command => $binaryinfo) {
if (!$binaryinfo["shebang"]) {
$selectedBinaries[$command] = $binaryinfo["path"];
}
}
} elseif ($resolvedPath = resolve_command_full_path($command)) {
$selectedBinaries[$command] = $resolvedPath;
} else {
print_error_and_exit("Provided PHP binary '$command' was not found.\n");
}
}
}
if (empty($selectedBinaries)) {
print_error_and_exit("At least one binary must be specified\n");
}
return $selectedBinaries;
}
function search_for_working_ldconfig()
{
static $path;
if ($path) {
return $path;
}
$paths = [
"/sbin", /* this is most likely path */
"/usr/sbin",
"/usr/local/sbin",
"/bin",
"/usr/bin",
"/usr/local/bin",
];
$search = function (&$path) {
exec("find $path -name ldconfig", $found, $result);
if ($result == 0) {
return $path = \end($found);
}
};
/* searching individual paths is much faster than searching
them all */
foreach ($paths as $path) {
if ($search($path)) {
return $path;
}
}
/* probably won't get this far, but just in case */
foreach (\explode(":", \getenv("PATH")) as $path) {
if (\array_search($path, $paths) === false) {
if ($search($path)) {
return $path;
}
}
}
/*
we cannot find a working ldconfig binary on this system,
fall back on previous behaviour:
there is a slim outside chance that exec() expands ldconfig
*/
return $path = "ldconfig";
}
/**
* Checks if a library is available or not in an OS-independent way.
*
* @param string $requiredLibrary E.g. libcurl
* @return void
*/
function check_library_prerequisite_or_exit($requiredLibrary)
{
if (is_alpine()) {
$lastLine = execute_or_exit(
"Error while searching for library '$requiredLibrary'.",
"find /usr/local/lib /usr/lib -type f -name '*{$requiredLibrary}*.so*'"
);
} else {
$ldconfig = search_for_working_ldconfig();
$lastLine = execute_or_exit(
"Cannot find library '$requiredLibrary'",
"$ldconfig -p | grep $requiredLibrary"
);
}
if (empty($lastLine)) {
print_error_and_exit("Required library '$requiredLibrary' not found.\n");
}
}
/**
* Checks if an extension is enabled or not.
*
* @param string $binary
* @param string $requiredLibrary E.g. json
* @return void
*/
function check_php_ext_prerequisite_or_exit($binary, $extName)
{
$lastLine = execute_or_exit(
"Cannot retrieve extensions list",
// '|| true' is necessary because grep exits with 1 if the pattern was not found.
"$binary -m | grep '$extName' || true"
);
if (empty($lastLine)) {
print_error_and_exit("Required PHP extension '$extName' not found.\n");
}
}
/**
* @return bool
*/
function is_alpine()
{
$osInfoFile = '/etc/os-release';
// if /etc/os-release is not readable, we cannot tell and we assume NO
if (!is_readable($osInfoFile)) {
return false;
}
return false !== stripos(file_get_contents($osInfoFile), 'alpine');
}
/**
* Returns the host architecture, e.g. x86_64, aarch64
*
* @return string
*/
function get_architecture()
{
return execute_or_exit(
"Cannot detect host architecture (uname -m)",
"uname -m"
);
}
/**
* Parses command line options provided by the user and generate a normalized $options array.
* @return array
*/
function parse_validate_user_options()
{
$shortOptions = "h";
$longOptions = [
OPT_HELP,
OPT_PHP_BIN . ':',
OPT_FILE . ':',
OPT_INSTALL_DIR . ':',
OPT_UNINSTALL,
OPT_ENABLE_APPSEC,
OPT_ENABLE_PROFILING,
];
$options = getopt($shortOptions, $longOptions);
global $argc;
if ($options === false || (empty($options) && $argc > 1)) {
/* Note that the above conditions are not as robust as I'd like.
* Consider:
* php datadog-setup.php --enable-profiling 0.69.0 --php-bin php
* getopt will stop at 0.69.0 as it doesn't recognize it, but it will
* return an array that only has enable-profiling in it.
* I don't see an obvious way out of this, but catching some failures
* here is better than not catching any.
*/
print_error_and_exit("Failed to parse options", true);
}
// Help and exit
if (key_exists('h', $options) || key_exists(OPT_HELP, $options)) {
print_help();
exit(0);
}
$normalizedOptions = [];
$normalizedOptions[OPT_UNINSTALL] = isset($options[OPT_UNINSTALL]) ? true : false;
if (!$normalizedOptions[OPT_UNINSTALL]) {
if (isset($options[OPT_FILE])) {
if (is_array($options[OPT_FILE])) {
print_error_and_exit('Only one --file can be provided', true);
}
$normalizedOptions[OPT_FILE] = $options[OPT_FILE];
}
}
if (isset($options[OPT_PHP_BIN])) {
$normalizedOptions[OPT_PHP_BIN] = is_array($options[OPT_PHP_BIN])
? $options[OPT_PHP_BIN]
: [$options[OPT_PHP_BIN]];
}
$normalizedOptions[OPT_INSTALL_DIR] = isset($options[OPT_INSTALL_DIR])
? rtrim($options[OPT_INSTALL_DIR], '/')
: '/opt/datadog';
$normalizedOptions[OPT_INSTALL_DIR] = $normalizedOptions[OPT_INSTALL_DIR] . '/dd-library';
$normalizedOptions[OPT_ENABLE_APPSEC] = isset($options[OPT_ENABLE_APPSEC]);
$normalizedOptions[OPT_ENABLE_PROFILING] = isset($options[OPT_ENABLE_PROFILING]);
return $normalizedOptions;
}
function print_error_and_exit($message, $printHelp = false)
{
echo "ERROR: $message\n";
if ($printHelp) {
print_help();
}
exit(1);
}
function print_warning($message)
{
echo "WARNING: $message\n";
}
/**
* Given a certain set of available PHP binaries, let users pick in an interactive way the ones where the library
* should be installed to.
*
* @param array $php_binaries
* @return array
*/
function pick_binaries_interactive($options, array $php_binaries)
{
echo sprintf(
"Multiple PHP binaries detected. Please select the binaries the datadog library will be %s:\n\n",
$options[OPT_UNINSTALL] ? "uninstalled from" : "installed to"
);
$commands = array_keys($php_binaries);
for ($index = 0; $index < count($commands); $index++) {
$command = $commands[$index];
$fullPath = $php_binaries[$command]["path"];
echo " "
. str_pad($index + 1, 2, ' ', STR_PAD_LEFT)
. ". "
. ($command !== $fullPath ? "$command --> " : "")
. $fullPath
. ($php_binaries[$command]["shebang"] ? " (not a binary)" : "")
. "\n";
}
echo "\n";
flush();
echo "Select binaries using their number. Multiple binaries separated by space (example: 1 3): ";
$userInput = fgets(STDIN);
$choices = array_map('intval', array_filter(explode(' ', $userInput)));
$pickedBinaries = [];
foreach ($choices as $choice) {
$index = $choice - 1; // we render to the user as 1-indexed
if (!isset($commands[$index])) {
echo "\nERROR: Wrong choice: $choice\n\n";
return pick_binaries_interactive($options, $php_binaries);
}
$command = $commands[$index];
$pickedBinaries[$command] = $php_binaries[$command]["path"];
}
return $pickedBinaries;
}
function execute_or_exit($exitMessage, $command)
{
$output = [];
$returnCode = 0;
$lastLine = exec($command, $output, $returnCode);
if (false === $lastLine || $returnCode > 0) {
print_error_and_exit(
$exitMessage
. "\nFailed command (return code $returnCode): $command\n"
. "---- Output ----\n"
. implode("\n", $output)
. "\n---- End of output ----\n"
);
}
return $lastLine;
}
/**
* Downloads the library applying a number of fallback mechanisms if specific libraries/binaries are not available.
*
* @param string $url
* @param string $destination
*/
function download($url, $destination)
{
echo "Downloading installable archive from $url.\n";
echo "This operation might take a while.\n";
$okMessage = "\nDownload completed\n\n";
/* We try the following options, mostly to provide progress report, if possible:
* 1) `ext-curl` (with progress report); if 'ext-curl' is not installed...
* 2) `curl` from CLI (it shows progress); if `curl` is not installed...
* 3) `file_get_contents()` (no progress report); if `allow_url_fopen=0`...
* 4) exit with errror
*/
// ext-curl
if (extension_loaded('curl')) {
if (false === $fp = fopen($destination, 'w+')) {
print_error_and_exit("Error while opening target file '$destination' for writing\n");
}
global $progress_counter;
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_TIMEOUT, 50);
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, 'on_download_progress');
curl_setopt($ch, CURLOPT_NOPROGRESS, false);
$progress_counter = 0;
$return = curl_exec($ch);
curl_close($ch);
fclose($fp);
if (false !== $return) {
echo $okMessage;
return;
}
// Otherwise we attempt other methods
}
// curl
$statusCode = 0;
$output = [];
if (false !== exec('curl --version', $output, $statusCode) && $statusCode === 0) {
$curlInvocationStatusCode = 0;
system(
'curl -L --output ' . escapeshellarg($destination) . ' ' . escapeshellarg($url),
$curlInvocationStatusCode
);
if ($curlInvocationStatusCode === 0) {
echo $okMessage;
return;
}
// Otherwise we attempt other methods
}
// file_get_contents
if (is_truthy(ini_get('allow_url_fopen'))) {
if (false === file_put_contents($destination, file_get_contents($url))) {
print_error_and_exit("Error while downloading the installable archive from $url\n");
}
echo $okMessage;
return;
}
echo "Error: Cannot download the installable archive.\n";
echo " One of the following prerequisites must be satisfied:\n";
echo " - PHP ext-curl extension is installed\n";
echo " - curl CLI command is available\n";
echo " - the INI setting 'allow_url_fopen=1'\n";
exit(1);
}
/**
* Progress callback as specified by the ext-curl documentation.
* see: https://www.php.net/manual/en/function.curl-setopt.php#:~:text=CURLOPT_PROGRESSFUNCTION
*
* @return int
*/
function on_download_progress($curlHandle, $download_size, $downloaded)
{
global $progress_counter;
if ($download_size === 0) {
return 0;
}
$ratio = $downloaded / $download_size;
if ($ratio == 1) {
return 0;
}
// Max 20 dots to show progress
if ($ratio >= ($progress_counter + (1 / 20))) {
$progress_counter = $ratio;
echo ".";
}
flush();
return 0;
}
/**
* Extracts and normalizes a set of properties from PHP's ini values.
*
* @param string $binary
* @return array
*/
function ini_values($binary)
{
$properties = [INI_MAIN, INI_SCANDIR, EXTENSION_DIR, THREAD_SAFETY, PHP_API, IS_DEBUG];
$lines = [];
// Timezone is irrelevant to this script. Quick-and-dirty workaround to the PHP 5 warning with missing timezone
exec(escapeshellarg($binary) . " -d date.timezone=UTC -i", $lines);
$found = [];
foreach ($lines as $line) {
$parts = explode('=>', $line);
if (count($parts) === 2 || count($parts) === 3) {
$key = trim($parts[0]);
if (in_array($key, $properties)) {
$value = trim(count($parts) === 2 ? $parts[1] : $parts[2]);
if ($value === "(none)") {
continue;
}
$found[$key] = $value;
}
}
}
return $found;
}
function is_truthy($value)
{
if ($value === null) {
return false;
}
$normalized = trim(strtolower($value));
return in_array($normalized, ['1', 'true', 'yes', 'enabled']);
}
/**
* @param string $prefix Default ''. Used for testing purposes only.
* @return array
*/
function search_php_binaries($prefix = '')
{
echo "Searching for available php binaries, this operation might take a while.\n";
$resolvedPaths = [];
$allPossibleCommands = build_known_command_names_matrix();
// First, we search in $PATH, for php, php7, php74, php7.4, php7.4-fpm, etc....
foreach ($allPossibleCommands as $command) {
if ($resolvedPath = resolve_command_full_path($command)) {
$resolvedPaths[$command] = $resolvedPath;
}
}
// Then we search in known possible locations for popular installable paths on different systems.
$standardPaths = [
$prefix . '/usr/bin',
$prefix . '/usr/sbin',
$prefix . '/usr/local/bin',
$prefix . '/usr/local/sbin',
];
$remiSafePaths = array_map(function ($phpVersion) use ($prefix) {
list($major, $minor) = explode('.', $phpVersion);
/* php is installed to /usr/bin/php{$major}{$minor} so we do not need to do anything special, while php-fpm
* is installed to /opt/remi/php{$major}{$minor}/root/usr/sbin and it needs to be added to the searched
* locations.
*/
return "{$prefix}/opt/remi/php{$major}{$minor}/root/usr/sbin";
}, get_supported_php_versions());
$pleskPaths = array_map(function ($phpVersion) use ($prefix) {
return "/opt/plesk/php/$phpVersion/bin";
}, get_supported_php_versions());
$escapedSearchLocations = implode(
' ',
array_map('escapeshellarg', array_merge($standardPaths, $remiSafePaths, $pleskPaths))
);
$escapedCommandNamesForFind = implode(
' -o ',
array_map(
function ($cmd) {
return '-name ' . escapeshellarg($cmd);
},
$allPossibleCommands
)
);
$pathsFound = [];
exec(
"find -L $escapedSearchLocations -type f \( $escapedCommandNamesForFind \) 2>/dev/null",
$pathsFound
);
foreach ($pathsFound as $path) {
$resolved = realpath($path);
if (in_array($resolved, array_values($resolvedPaths))) {