Cleanup processes output handling

src/Composer/Downloader/RarDownloader.php

@@ -44,7 +44,7 @@ class RarDownloader extends ArchiveDownloader
 
         // Try to use unrar on *nix
         if (!Platform::isWindows()) {
-            $command = 'unrar x ' . ProcessExecutor::escape($file) . ' ' . ProcessExecutor::escape($path) . ' && chmod -R u+w ' . ProcessExecutor::escape($path);
+            $command = 'unrar x ' . ProcessExecutor::escape($file) . ' ' . ProcessExecutor::escape($path) . ' >/dev/null && chmod -R u+w ' . ProcessExecutor::escape($path);
 
             if (0 === $this->process->execute($command, $ignoredOutput)) {
                 return;

src/Composer/Downloader/ZipDownloader.php

@@ -70,7 +70,7 @@ class ZipDownloader extends ArchiveDownloader
         $processError = null;
 
         if (self::$hasSystemUnzip && !(class_exists('ZipArchive') && Platform::isWindows())) {
-            $command = 'unzip '.ProcessExecutor::escape($file).' -d '.ProcessExecutor::escape($path);
+            $command = 'unzip -qq '.ProcessExecutor::escape($file).' -d '.ProcessExecutor::escape($path);
             if (!Platform::isWindows()) {
                 $command .= ' && chmod -R u+w ' . ProcessExecutor::escape($path);
             }