forked from pool/glibc
Andreas Schwab
7db7ce4082
- no-long-double.patch: Don't use long double functions if NO_LONG_DOUBLE
- Update to glibc 2.23 release.
* Unicode 8.0.0 Support
* sched_setaffinity, pthread_setaffinity_np no longer attempt to guess
the kernel-internal CPU set size
* The fts.h header can now be used with -D_FILE_OFFSET_BITS=64
* getaddrinfo now detects certain invalid responses on an internal
netlink socket
* A defect in the malloc implementation, present since glibc 2.15 (2012)
or glibc 2.10 via --enable-experimental-malloc (2009), could result in
the unnecessary serialization of memory allocation requests across
threads
* The obsolete header <regexp.h> has been removed
* The obsolete functions bdflush, create_module, get_kernel_syms,
query_module and uselib are no longer available to newly linked
binaries
* Optimized string, wcsmbs and memory functions for IBM z13.
* Newly linked programs that define a variable called signgam will no
longer have it set by the lgamma, lgammaf and lgammal functions
- Removed patches:
* dont-remove-nodelete-flag.patch
* openat64-readd-o-largefile.patch
* mntent-blank-line.patch
* opendir-o-directory-check.patch
* strcoll-remove-strdiff-opt.patch
* ld-pointer-guard.patch
* tls-dtor-list-mangling.patch
* powerpc-lock-elision-race.patch
* prelink-elf-rtype-class.patch
OBS-URL: https://build.opensuse.org/request/show/361238
OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=423
123 lines
4.5 KiB
Diff
123 lines
4.5 KiB
Diff
From libc-alpha-return-22754-pasky=ucw.cz@sourceware.org Tue Mar 16 00:47:00 2010
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Message-ID: <4B9E6CFA.7020002@riot.org>
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Date: Mon, 15 Mar 2010 18:23:06 +0100
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From: Sebastian Kienzl <seb@riot.org>
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User-Agent: Thunderbird 2.0.0.23 (Windows/20090812)
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MIME-Version: 1.0
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To: libc-alpha@sourceware.org
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Subject: Reloading of /etc/resolv.conf
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Content-Type: multipart/mixed;
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boundary="------------060407080409020101000002"
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Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm
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This is a multi-part message in MIME format.
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--------------060407080409020101000002
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Content-Type: text/plain; charset=ISO-8859-15; format=flowed
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Content-Transfer-Encoding: 7bit
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Hello!
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There's a patch in the wild against the resolver which makes it reload
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/etc/resolv.conf on change, see
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http://sources.redhat.com/ml/libc-alpha/2004-09/msg00130.html
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However, this patch actually doesn't work properly for multi-threaded
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programs, as only one thread will notice the change and refresh its
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resolver state. I've attached a proper patch. It's for 2.5 but it should
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work with current versions, too.
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Even though the patch may not be interesting for upstream, I decided to
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let you know about this problem, since the mentioned patch seems to be
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used by at least Debian and Ubuntu.
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Regards,
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Seb.
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--------------060407080409020101000002
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Content-Type: text/plain;
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name="glibc-2.5-resolvconf.patch"
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Content-Transfer-Encoding: 7bit
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Content-Disposition: inline;
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filename="glibc-2.5-resolvconf.patch"
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Index: glibc-2.17.90/resolv/res_libc.c
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===================================================================
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--- glibc-2.17.90.orig/resolv/res_libc.c
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+++ glibc-2.17.90/resolv/res_libc.c
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@@ -22,7 +22,7 @@
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#include <arpa/nameser.h>
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#include <resolv.h>
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#include <libc-lock.h>
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-
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+#include <sys/stat.h>
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/* The following bit is copied from res_data.c (where it is #ifdef'ed
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out) since res_init() should go into libc.so but the rest of that
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@@ -89,12 +89,34 @@ res_init(void) {
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return (__res_vinit(&_res, 1));
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}
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+static time_t resconf_mtime;
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+__libc_lock_define_initialized (static, resconf_mtime_lock);
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+
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+/* Check if the modification time of resolv.conf has changed.
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+ If so, have all threads re-initialize their resolver states */
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+static void
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+__res_check_resconf (void)
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+{
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+ struct stat statbuf;
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+ if (stat (_PATH_RESCONF, &statbuf) == 0) {
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+ __libc_lock_lock (resconf_mtime_lock);
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+ if (statbuf.st_mtime != resconf_mtime) {
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+ resconf_mtime = statbuf.st_mtime;
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+ atomicinclock (lock);
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+ atomicinc (__res_initstamp);
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+ atomicincunlock (lock);
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+ }
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+ __libc_lock_unlock (resconf_mtime_lock);
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+ }
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+}
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+
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/* Initialize resp if RES_INIT is not yet set or if res_init in some other
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thread requested re-initializing. */
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int
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__res_maybe_init (res_state resp, int preinit)
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{
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if (resp->options & RES_INIT) {
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+ __res_check_resconf ();
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if (__res_initstamp != resp->_u._ext.initstamp) {
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if (resp->nscount > 0)
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__res_iclose (resp, true);
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