From patchwork Sat Nov 29 10:13:33 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joseph Myers X-Patchwork-Id: 4004 Received: (qmail 3065 invoked by alias); 29 Nov 2014 10:13:41 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 3056 invoked by uid 89); 29 Nov 2014 10:13:40 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=AWL, BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.2 X-HELO: relay1.mentorg.com Date: Sat, 29 Nov 2014 10:13:33 +0000 From: Joseph Myers To: Subject: Fix fgets_unlocked namespace issues (bug 17664) Message-ID: User-Agent: Alpine 2.10 (DEB 1266 2009-07-14) MIME-Version: 1.0 Various POSIX functions bring in res_init.o, res_hconf.o or mntent_r.o, which use fgets_unlocked, which is not a POSIX function. This patch arranges for them to use __fgets_unlocked instead. (The IS_IN (libc) conditional in rec_hconf.c is needed because that file is also used in nscd.) Tested for x86_64 (testsuite, and that disassembly of installed shared libraries is unchanged by the patch except for an assertion line number). Note that most of the linknamespace tests that failed because of fgets_unlocked from the resolver also fail because of other symbols brought in by the resolver, so the number of XFAILs this removes is limited. Also note that fgets_unlocked failures for unistd.h for XPG3/XPG4 showed up that actually unistd.h is declaring too much for XPG3/XPG4 (bug 17665) - there is no actual need to make getusershell.c use __fgets_unlocked (at least as regards formal standards are concerned; maybe it should still change for namespace-cleanness of _DEFAULT_SOURCE) because the functions there aren't actually in any of the supported standards; the correct fix for those failures will be to stop the *usershell* functions appearing in unistd.h for XPG3/XPG4. 2014-11-29 Joseph Myers [BZ #17664] * misc/mntent_r.c (__getmntent_r): Use __fgets_unlocked instead of fgets_unlocked. * resolv/res_hconf.c [IS_IN (libc)] (fgets_unlocked): Define to __fgets_unlocked. * resolv/res_init.c (__res_vinit): Use __fgets_unlocked instead of fgets_unlocked. * conform/Makefile (test-xfail-XPG4/sys/statvfs.h/linknamespace): Remove variable. (test-xfail-POSIX/sys/mman.h/linknamespace): Likewise. (test-xfail-UNIX98/sys/mman.h/linknamespace): Likewise. (test-xfail-UNIX98/sys/statvfs.h/linknamespace): Likewise. (test-xfail-XOPEN2K/sys/mman.h/linknamespace): Likewise. (test-xfail-XOPEN2K/sys/statvfs.h/linknamespace): Likewise. (test-xfail-POSIX2008/sys/mman.h/linknamespace): Likewise. (test-xfail-POSIX2008/sys/statvfs.h/linknamespace): Likewise. (test-xfail-XOPEN2K8/sys/mman.h/linknamespace): Likewise. (test-xfail-XOPEN2K8/sys/statvfs.h/linknamespace): Likewise. diff --git a/conform/Makefile b/conform/Makefile index 641f546..eed2843 100644 --- a/conform/Makefile +++ b/conform/Makefile @@ -369,7 +369,6 @@ test-xfail-XPG4/regex.h/linknamespace = yes test-xfail-XPG4/search.h/linknamespace = yes test-xfail-XPG4/stdio.h/linknamespace = yes test-xfail-XPG4/stdlib.h/linknamespace = yes -test-xfail-XPG4/sys/statvfs.h/linknamespace = yes test-xfail-XPG4/syslog.h/linknamespace = yes test-xfail-XPG4/time.h/linknamespace = yes test-xfail-XPG4/unistd.h/linknamespace = yes @@ -382,7 +381,6 @@ test-xfail-POSIX/pthread.h/linknamespace = yes test-xfail-POSIX/regex.h/linknamespace = yes test-xfail-POSIX/sched.h/linknamespace = yes test-xfail-POSIX/semaphore.h/linknamespace = yes -test-xfail-POSIX/sys/mman.h/linknamespace = yes test-xfail-POSIX/time.h/linknamespace = yes test-xfail-POSIX/unistd.h/linknamespace = yes test-xfail-POSIX/wordexp.h/linknamespace = yes @@ -403,8 +401,6 @@ test-xfail-UNIX98/search.h/linknamespace = yes test-xfail-UNIX98/semaphore.h/linknamespace = yes test-xfail-UNIX98/stdio.h/linknamespace = yes test-xfail-UNIX98/stdlib.h/linknamespace = yes -test-xfail-UNIX98/sys/mman.h/linknamespace = yes -test-xfail-UNIX98/sys/statvfs.h/linknamespace = yes test-xfail-UNIX98/syslog.h/linknamespace = yes test-xfail-UNIX98/time.h/linknamespace = yes test-xfail-UNIX98/unistd.h/linknamespace = yes @@ -428,8 +424,6 @@ test-xfail-XOPEN2K/semaphore.h/linknamespace = yes test-xfail-XOPEN2K/signal.h/linknamespace = yes test-xfail-XOPEN2K/spawn.h/linknamespace = yes test-xfail-XOPEN2K/stdlib.h/linknamespace = yes -test-xfail-XOPEN2K/sys/mman.h/linknamespace = yes -test-xfail-XOPEN2K/sys/statvfs.h/linknamespace = yes test-xfail-XOPEN2K/sys/wait.h/linknamespace = yes test-xfail-XOPEN2K/syslog.h/linknamespace = yes test-xfail-XOPEN2K/time.h/linknamespace = yes @@ -448,8 +442,6 @@ test-xfail-POSIX2008/pthread.h/linknamespace = yes test-xfail-POSIX2008/regex.h/linknamespace = yes test-xfail-POSIX2008/semaphore.h/linknamespace = yes test-xfail-POSIX2008/spawn.h/linknamespace = yes -test-xfail-POSIX2008/sys/mman.h/linknamespace = yes -test-xfail-POSIX2008/sys/statvfs.h/linknamespace = yes test-xfail-POSIX2008/time.h/linknamespace = yes test-xfail-POSIX2008/unistd.h/linknamespace = yes test-xfail-XOPEN2K8/aio.h/linknamespace = yes @@ -467,8 +459,6 @@ test-xfail-XOPEN2K8/regex.h/linknamespace = yes test-xfail-XOPEN2K8/search.h/linknamespace = yes test-xfail-XOPEN2K8/semaphore.h/linknamespace = yes test-xfail-XOPEN2K8/spawn.h/linknamespace = yes -test-xfail-XOPEN2K8/sys/mman.h/linknamespace = yes -test-xfail-XOPEN2K8/sys/statvfs.h/linknamespace = yes test-xfail-XOPEN2K8/syslog.h/linknamespace = yes test-xfail-XOPEN2K8/time.h/linknamespace = yes test-xfail-XOPEN2K8/unistd.h/linknamespace = yes diff --git a/misc/mntent_r.c b/misc/mntent_r.c index e68ec8e..0d5c2e3 100644 --- a/misc/mntent_r.c +++ b/misc/mntent_r.c @@ -127,7 +127,7 @@ __getmntent_r (FILE *stream, struct mntent *mp, char *buffer, int bufsiz) { char *end_ptr; - if (fgets_unlocked (buffer, bufsiz, stream) == NULL) + if (__fgets_unlocked (buffer, bufsiz, stream) == NULL) { funlockfile (stream); return NULL; @@ -140,7 +140,7 @@ __getmntent_r (FILE *stream, struct mntent *mp, char *buffer, int bufsiz) { /* Not the whole line was read. Do it now but forget it. */ char tmp[1024]; - while (fgets_unlocked (tmp, sizeof tmp, stream) != NULL) + while (__fgets_unlocked (tmp, sizeof tmp, stream) != NULL) if (strchr (tmp, '\n') != NULL) break; } diff --git a/resolv/res_hconf.c b/resolv/res_hconf.c index cde0229..6693b12 100644 --- a/resolv/res_hconf.c +++ b/resolv/res_hconf.c @@ -46,6 +46,10 @@ #include "res_hconf.h" #include +#if IS_IN (libc) +# define fgets_unlocked __fgets_unlocked +#endif + #define _PATH_HOSTCONF "/etc/host.conf" /* Environment vars that all user to override default behavior: */ diff --git a/resolv/res_init.c b/resolv/res_init.c index ea133f8..90760ec 100644 --- a/resolv/res_init.c +++ b/resolv/res_init.c @@ -238,7 +238,7 @@ __res_vinit(res_state statp, int preinit) { /* No threads use this stream. */ __fsetlocking (fp, FSETLOCKING_BYCALLER); /* read the config file */ - while (fgets_unlocked(buf, sizeof(buf), fp) != NULL) { + while (__fgets_unlocked(buf, sizeof(buf), fp) != NULL) { /* skip comments */ if (*buf == ';' || *buf == '#') continue;