From patchwork Wed Jan 12 17:00:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Weimer X-Patchwork-Id: 49927 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 5B709388A01A for ; Wed, 12 Jan 2022 17:02:00 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 5B709388A01A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1642006920; bh=i5arpXIxvKBSeIvuCOK5EzWB3WEbugkkGvnvw8JP6Ok=; h=To:Subject:In-Reply-To:References:Date:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=G0aNsegk+GYljnDpgUQkhcp7o/fo+1uuFzomz58acLpiQYIOfMa7UOq9RDfNA5Ujj irx/pLuRmDToUjT/2AepLVFPEu3Q7XWa+OuBDpHr+DhV7A4MXV74uI2ohRVThn2f8A oCQspSs3NWyYFpCf3dqqazz32xBaug0USOV/33F8= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 94883394002A for ; Wed, 12 Jan 2022 17:01:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 94883394002A 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-39-DcQpZVYcNaSk13RQWq9aWQ-1; Wed, 12 Jan 2022 12:01:00 -0500 X-MC-Unique: DcQpZVYcNaSk13RQWq9aWQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C337883DD22 for ; Wed, 12 Jan 2022 17:00:59 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.102]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E2DBD87958; Wed, 12 Jan 2022 17:00:58 +0000 (UTC) To: libc-alpha@sourceware.org Subject: [PATCH 1/4] socket: Add the __sockaddr_un_set function In-Reply-To: References: X-From-Line: 53ed6ecda61defacb37475d19b990717ce592e9b Mon Sep 17 00:00:00 2001 Message-Id: <53ed6ecda61defacb37475d19b990717ce592e9b.1642006428.git.fweimer@redhat.com> Date: Wed, 12 Jan 2022 18:00:57 +0100 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-12.4 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, 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-Patchwork-Original-From: Florian Weimer via Libc-alpha From: Florian Weimer Reply-To: Florian Weimer Cc: Martin Sebor Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" --- include/sys/un.h | 12 +++++++ socket/Makefile | 6 +++- socket/sockaddr_un_set.c | 41 ++++++++++++++++++++++++ socket/tst-sockaddr_un_set.c | 62 ++++++++++++++++++++++++++++++++++++ 4 files changed, 120 insertions(+), 1 deletion(-) create mode 100644 socket/sockaddr_un_set.c create mode 100644 socket/tst-sockaddr_un_set.c diff --git a/include/sys/un.h b/include/sys/un.h index bdbee99980..152afd9fc7 100644 --- a/include/sys/un.h +++ b/include/sys/un.h @@ -1 +1,13 @@ #include + +#ifndef _ISOMAC + +/* Set ADDR->sun_family to AF_UNIX and ADDR->sun_path to PATHNAME. + Return 0 on success or -1 on failure (due to overlong PATHNAME). + The caller should always use sizeof (struct sockaddr_un) as the + socket address length, disregaring the length of PATHNAME. + Only concrete (non-abstract) pathnames are supported. */ +int __sockaddr_un_set (struct sockaddr_un *addr, const char *pathname) + attribute_hidden; + +#endif /* _ISOMAC */ diff --git a/socket/Makefile b/socket/Makefile index 39333e10ca..156eec6c85 100644 --- a/socket/Makefile +++ b/socket/Makefile @@ -29,13 +29,17 @@ headers := sys/socket.h sys/un.h bits/sockaddr.h bits/socket.h \ routines := accept bind connect getpeername getsockname getsockopt \ listen recv recvfrom recvmsg send sendmsg sendto \ setsockopt shutdown socket socketpair isfdtype opensock \ - sockatmark accept4 recvmmsg sendmmsg + sockatmark accept4 recvmmsg sendmmsg sockaddr_un_set tests := \ tst-accept4 \ tst-sockopt \ # tests +tests-internal := \ + tst-sockaddr_un_set \ + # tests-internal + tests-time64 := \ tst-sockopt-time64 \ # tests diff --git a/socket/sockaddr_un_set.c b/socket/sockaddr_un_set.c new file mode 100644 index 0000000000..0bd40dc34e --- /dev/null +++ b/socket/sockaddr_un_set.c @@ -0,0 +1,41 @@ +/* Set the sun_path member of struct sockaddr_un. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include +#include + +int +__sockaddr_un_set (struct sockaddr_un *addr, const char *pathname) +{ + size_t name_length = strlen (pathname); + + /* The kernel supports names of exactly sizeof (addr->sun_path) + bytes, without a null terminator, but userspace does not; see the + SUN_LEN macro. */ + if (name_length >= sizeof (addr->sun_path)) + { + __set_errno (EINVAL); /* Error code used by the kernel. */ + return -1; + } + + addr->sun_family = AF_UNIX; + memcpy (addr->sun_path, pathname, name_length + 1); + return 0; +} diff --git a/socket/tst-sockaddr_un_set.c b/socket/tst-sockaddr_un_set.c new file mode 100644 index 0000000000..29c2a81afd --- /dev/null +++ b/socket/tst-sockaddr_un_set.c @@ -0,0 +1,62 @@ +/* Test the __sockaddr_un_set function. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +/* Re-compile the function because the version in libc is not + exported. */ +#include "sockaddr_un_set.c" + +#include + +static int +do_test (void) +{ + struct sockaddr_un sun; + + memset (&sun, 0xcc, sizeof (sun)); + __sockaddr_un_set (&sun, ""); + TEST_COMPARE (sun.sun_family, AF_UNIX); + TEST_COMPARE (__sockaddr_un_set (&sun, ""), 0); + + memset (&sun, 0xcc, sizeof (sun)); + TEST_COMPARE (__sockaddr_un_set (&sun, "/example"), 0); + TEST_COMPARE_STRING (sun.sun_path, "/example"); + + { + char pathname[108]; /* Length of sun_path (ABI constant). */ + memset (pathname, 'x', sizeof (pathname)); + pathname[sizeof (pathname) - 1] = '\0'; + memset (&sun, 0xcc, sizeof (sun)); + TEST_COMPARE (__sockaddr_un_set (&sun, pathname), 0); + TEST_COMPARE (sun.sun_family, AF_UNIX); + TEST_COMPARE_STRING (sun.sun_path, pathname); + } + + { + char pathname[109]; + memset (pathname, 'x', sizeof (pathname)); + pathname[sizeof (pathname) - 1] = '\0'; + memset (&sun, 0xcc, sizeof (sun)); + errno = 0; + TEST_COMPARE (__sockaddr_un_set (&sun, pathname), -1); + TEST_COMPARE (errno, EINVAL); + } + + return 0; +} + +#include