Anomie has uploaded a new change for review.
https://gerrit.wikimedia.org/r/72089
Change subject: Improve disable_functions handling in LuaStandalone
......................................................................
Improve disable_functions handling in LuaStandalone
If the user is on a webhost that has proc_open listed in PHP's
disable_functions directive, we should give a better error message.
Until we no longer support PHP below 5.4, we should do the same for
safe_mode. And since we're doing that, we may as well report any other
warnings if proc_open fails, too.
In addition, this cleans up error handling in
Scribunto_LuaEngine::load() so it doesn't pretend the interpreter is
loaded if getInterpreter() throws an exception. Otherwise other code
winds up with PHP fatal errors trying to access a null value.
Bug: 50706
Change-Id: I2887b722e089fd7a526aa7dcab9c80deb343d8ac
---
M Scribunto.i18n.php
M engines/LuaCommon/LuaCommon.php
M engines/LuaStandalone/LuaStandaloneEngine.php
3 files changed, 56 insertions(+), 23 deletions(-)
git pull ssh://gerrit.wikimedia.org:29418/mediawiki/extensions/Scribunto
refs/changes/89/72089/1
diff --git a/Scribunto.i18n.php b/Scribunto.i18n.php
index 3735b71..91eeb68 100644
--- a/Scribunto.i18n.php
+++ b/Scribunto.i18n.php
@@ -55,6 +55,9 @@
'scribunto-lua-noreturn' => 'Script error: The module did not return a
value. It is supposed to return an export table.',
'scribunto-lua-notarrayreturn' => 'Script error: The module returned
something other than a table. It is supposed to return an export table.',
'scribunto-luastandalone-proc-error' => 'Lua error: Cannot create
process.',
+ 'scribunto-luastandalone-proc-error-msg' => 'Lua error: Cannot create
process: $2',
+ 'scribunto-luastandalone-proc-error-proc-open' => 'Lua error: Cannot
create process: proc_open is not available. Check PHP\'s "disable_functions"
configuration directive.',
+ 'scribunto-luastandalone-proc-error-safe-mode' => 'Lua error: Cannot
create process. Note that PHP\'s deprecated "safe_mode" configuration directive
is enabled.',
'scribunto-luastandalone-decode-error' => 'Lua error: Internal error:
Unable to decode message.',
'scribunto-luastandalone-write-error' => 'Lua error: Internal error:
Error writing to pipe.',
'scribunto-luastandalone-read-error' => 'Lua error: Internal error:
Error reading from pipe.',
@@ -129,6 +132,11 @@
'scribunto-lua-noreturn' => 'Error message.',
'scribunto-lua-notarrayreturn' => 'Error message.',
'scribunto-luastandalone-proc-error' => 'Exception message.',
+ 'scribunto-luastandalone-proc-error-msg' => 'Exception message.
Parameters:
+* $1 - (Unused)
+* $2 - Warning/error text from PHP',
+ 'scribunto-luastandalone-proc-error-proc-open' => 'Exception message
displayed when PHP\'s proc_open function is not available, which is needed by
the LuaStandalone engine.',
+ 'scribunto-luastandalone-proc-error-safe-mode' => 'Exception message
displayed when PHP\'s "safe_mode" configuration directive is enabled.',
'scribunto-luastandalone-decode-error' => 'Exception message.',
'scribunto-luastandalone-write-error' => 'Exception message.',
'scribunto-luastandalone-read-error' => 'Exception message.',
diff --git a/engines/LuaCommon/LuaCommon.php b/engines/LuaCommon/LuaCommon.php
index bd2bd6b..ab893ec 100644
--- a/engines/LuaCommon/LuaCommon.php
+++ b/engines/LuaCommon/LuaCommon.php
@@ -67,32 +67,38 @@
}
$this->loaded = true;
- $this->interpreter = $this->newInterpreter();
+ try {
+ $this->interpreter = $this->newInterpreter();
- $funcs = array(
- 'loadPackage',
- 'frameExists',
- 'newChildFrame',
- 'getExpandedArgument',
- 'getAllExpandedArguments',
- 'expandTemplate',
- 'callParserFunction',
- 'preprocess',
- 'incrementExpensiveFunctionCount',
- );
+ $funcs = array(
+ 'loadPackage',
+ 'frameExists',
+ 'newChildFrame',
+ 'getExpandedArgument',
+ 'getAllExpandedArguments',
+ 'expandTemplate',
+ 'callParserFunction',
+ 'preprocess',
+ 'incrementExpensiveFunctionCount',
+ );
- $lib = array();
- foreach ( $funcs as $name ) {
- $lib[$name] = array( $this, $name );
- }
+ $lib = array();
+ foreach ( $funcs as $name ) {
+ $lib[$name] = array( $this, $name );
+ }
- $this->mw = $this->registerInterface( 'mw.lua', $lib,
- array( 'allowEnvFuncs' =>
$this->options['allowEnvFuncs'] ) );
+ $this->mw = $this->registerInterface( 'mw.lua', $lib,
+ array( 'allowEnvFuncs' =>
$this->options['allowEnvFuncs'] ) );
- $libraries = $this->getLibraries( 'lua', self::$libraryClasses
);
- foreach ( $libraries as $name => $class ) {
- $this->loadedLibraries[$name] = new $class( $this );
- $this->loadedLibraries[$name]->register();
+ $libraries = $this->getLibraries( 'lua',
self::$libraryClasses );
+ foreach ( $libraries as $name => $class ) {
+ $this->loadedLibraries[$name] = new $class(
$this );
+ $this->loadedLibraries[$name]->register();
+ }
+ } catch ( Exception $ex ) {
+ $this->loaded = false;
+ $this->interpreter = null;
+ throw $ex;
}
}
diff --git a/engines/LuaStandalone/LuaStandaloneEngine.php
b/engines/LuaStandalone/LuaStandaloneEngine.php
index 748ec96..af21a7a 100644
--- a/engines/LuaStandalone/LuaStandaloneEngine.php
+++ b/engines/LuaStandalone/LuaStandaloneEngine.php
@@ -141,6 +141,16 @@
wfDebug( __METHOD__.": creating interpreter: $cmd\n" );
+ // Check whether proc_open is available before trying to call
it (e.g.
+ // PHP's disable_functions may have removed it)
+ if ( !function_exists( 'proc_open' ) ) {
+ throw $this->engine->newException(
'scribunto-luastandalone-proc-error-proc-open' );
+ }
+
+ // Clear the "last error", so if proc_open fails we can know any
+ // warning was generated by that.
+ @user_error( '' );
+
$this->proc = proc_open(
$cmd,
array(
@@ -150,7 +160,16 @@
),
$pipes );
if ( !$this->proc ) {
- throw $this->engine->newException(
'scribunto-luastandalone-proc-error' );
+ $err = error_get_last();
+ if ( !empty( $err['message'] ) ) {
+ throw $this->engine->newException(
'scribunto-luastandalone-proc-error-msg',
+ array( 'args' => array( $err['message']
) ) );
+ } elseif ( ini_get( 'safe_mode' ) ) {
+ /** @todo: Remove this case once we no longer
support PHP 5.3 */
+ throw $this->engine->newException(
'scribunto-luastandalone-proc-error-safe-mode' );
+ } else {
+ throw $this->engine->newException(
'scribunto-luastandalone-proc-error' );
+ }
}
$this->writePipe = $pipes[0];
$this->readPipe = $pipes[1];
--
To view, visit https://gerrit.wikimedia.org/r/72089
To unsubscribe, visit https://gerrit.wikimedia.org/r/settings
Gerrit-MessageType: newchange
Gerrit-Change-Id: I2887b722e089fd7a526aa7dcab9c80deb343d8ac
Gerrit-PatchSet: 1
Gerrit-Project: mediawiki/extensions/Scribunto
Gerrit-Branch: master
Gerrit-Owner: Anomie <bjor...@wikimedia.org>
_______________________________________________
MediaWiki-commits mailing list
MediaWiki-commits@lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/mediawiki-commits
