public inbox for glibc-cvs@sourceware.org help / color / mirror / Atom feed
From: Dmitry Levin <ldv@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/release/2.32/master] socket: Add the __sockaddr_un_set function Date: Fri, 7 Oct 2022 08:20:38 +0000 (GMT) [thread overview] Message-ID: <20221007082038.2D5AE382F987@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b10d5e62a6ac7688305772eb64aac3eda87b1623 commit b10d5e62a6ac7688305772eb64aac3eda87b1623 Author: Florian Weimer <fweimer@redhat.com> Date: Mon Jan 17 10:21:34 2022 +0100 socket: Add the __sockaddr_un_set function Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> (cherry picked from commit e368b12f6c16b6888dda99ba641e999b9c9643c8) Diff: --- 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(-) 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 <socket/sys/un.h> + +#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 125c042cab..19fc6ab41d 100644 --- a/socket/Makefile +++ b/socket/Makefile @@ -29,10 +29,14 @@ 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 +tests-internal := \ + tst-sockaddr_un_set \ + # tests-internal + aux := sa_len include ../Rules 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 + <https://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <string.h> +#include <sys/socket.h> +#include <sys/un.h> + +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 + <https://www.gnu.org/licenses/>. */ + +/* Re-compile the function because the version in libc is not + exported. */ +#include "sockaddr_un_set.c" + +#include <support/check.h> + +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 <support/test-driver.c>
reply other threads:[~2022-10-07 8:20 UTC|newest] Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20221007082038.2D5AE382F987@sourceware.org \ --to=ldv@sourceware.org \ --cc=glibc-cvs@sourceware.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).