From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id C76FE3858D39 for ; Mon, 24 Jan 2022 14:43:37 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org C76FE3858D39 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-484-j3dEmh1wMy-CS1ngWltpCQ-1; Mon, 24 Jan 2022 09:43:36 -0500 X-MC-Unique: j3dEmh1wMy-CS1ngWltpCQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8422D190B2A1 for ; Mon, 24 Jan 2022 14:43:35 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.8]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 867137BB60; Mon, 24 Jan 2022 14:43:28 +0000 (UTC) From: Florian Weimer To: libc-alpha@sourceware.org Cc: Siddhesh Poyarekar , DJ Delorie Subject: [PATCH] Linux: Detect user namespace support in io/tst-getcwd-smallbuff Date: Mon, 24 Jan 2022 15:43:26 +0100 Message-ID: <87fspd2nzl.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-12.2 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 Jan 2022 14:43:38 -0000 Otherwise the test fails with certain container runtimes. --- sysdeps/unix/sysv/linux/tst-getcwd-smallbuff.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/sysdeps/unix/sysv/linux/tst-getcwd-smallbuff.c b/sysdeps/unix/sysv/linux/tst-getcwd-smallbuff.c index d460d6e766..55362f6060 100644 --- a/sysdeps/unix/sysv/linux/tst-getcwd-smallbuff.c +++ b/sysdeps/unix/sysv/linux/tst-getcwd-smallbuff.c @@ -34,6 +34,7 @@ #include #include #include +#include #include #include @@ -188,6 +189,23 @@ do_test (void) xmkdir (MOUNT_NAME, S_IRWXU); atexit (do_cleanup); + /* Check whether user namespaces are supported. */ + { + pid_t pid = xfork (); + if (pid == 0) + { + if (unshare (CLONE_NEWUSER | CLONE_NEWNS) != 0) + _exit (EXIT_UNSUPPORTED); + else + _exit (0); + } + int status; + xwaitpid (pid, &status, 0); + TEST_VERIFY_EXIT (WIFEXITED (status)); + if (WEXITSTATUS (status) != 0) + return WEXITSTATUS (status); + } + TEST_VERIFY_EXIT (socketpair (AF_UNIX, SOCK_STREAM, 0, sockfd) == 0); pid_t child_pid = xclone (child_func, NULL, child_stack, sizeof (child_stack),