https://github.com/archlinuxarm/PKGBUILDs/issues/296
Fixes the bug causing a segfault on nscd and sshd:
symbol lookup error: /usr/lib/libnss_ldap.so.2: undefined symbol: __libc_lock_lock
--- ldap-nss.c.orig 2012-10-17 12:32:03.908730283 +0000
+++ ldap-nss.c 2012-10-17 12:38:10.906767283 +0000
@@ -148,7 +148,7 @@
*/
static ldap_session_t __session = { NULL, NULL, 0, LS_UNINITIALIZED };
-#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE___LIBC_ONCE)
static pthread_once_t __once = PTHREAD_ONCE_INIT;
#endif
@@ -168,7 +168,7 @@
static int __ssl_initialized = 0;
#endif /* HAVE_LDAPSSL_CLIENT_INIT */
-#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE___LIBC_ONCE)
/*
* Prepare for fork(); lock mutex.
*/
@@ -519,7 +519,7 @@
}
#endif /* HAVE_NSSWITCH_H */
-#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#if defined(HAVE_PTHREAD_ATFORK) || defined(HAVE___LIBC_ONCE)
static void
do_atfork_prepare (void)
{
@@ -553,7 +553,7 @@
#ifdef HAVE_PTHREAD_ATFORK
(void) pthread_atfork (do_atfork_prepare, do_atfork_parent,
do_atfork_child);
-#elif defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#elif defined(HAVE___LIBC_ATFORK)
(void) __libc_atfork (do_atfork_prepare, do_atfork_parent, do_atfork_child);
#endif
@@ -1119,7 +1119,7 @@
}
#ifndef HAVE_PTHREAD_ATFORK
-#if defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#if defined(HAVE___LIBC_ONCE)
/*
* This bogosity is necessary because Linux uses different
* PIDs for different threads (like IRIX, which we don't
@@ -1151,7 +1151,7 @@
pid = -1; /* linked against libpthreads, don't care */
#else
pid = getpid ();
-#endif /* HAVE_LIBC_LOCK_H || HAVE_BITS_LIBC_LOCK_H */
+#endif /* HAVE___LIBC_ONCE */
#endif /* HAVE_PTHREAD_ATFORK */
euid = geteuid ();
@@ -1161,7 +1161,7 @@
syslog (LOG_DEBUG,
"nss_ldap: __session.ls_state=%d, __session.ls_conn=%p, __euid=%i, euid=%i",
__session.ls_state, __session.ls_conn, __euid, euid);
-#elif defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#elif defined(HAVE___LIBC_ONCE)
syslog (LOG_DEBUG,
"nss_ldap: libpthreads=%s, __session.ls_state=%d, __session.ls_conn=%p, __pid=%i, pid=%i, __euid=%i, euid=%i",
((__pthread_once == NULL || __pthread_atfork == NULL) ? "FALSE" : "TRUE"),
@@ -1185,11 +1185,11 @@
}
else
#ifndef HAVE_PTHREAD_ATFORK
-#if defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#if defined(HAVE___LIBC_ONCE)
if ((__pthread_once == NULL || __pthread_atfork == NULL) && __pid != pid)
#else
if (__pid != pid)
-#endif /* HAVE_LIBC_LOCK_H || HAVE_BITS_LIBC_LOCK_H */
+#endif /* HAVE___LIBC_ONCE */
{
do_close_no_unbind ();
}
@@ -1250,9 +1250,9 @@
debug ("<== do_init (pthread_once failed)");
return NSS_UNAVAIL;
}
-#elif defined(HAVE_PTHREAD_ATFORK) && ( defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H) )
+#elif defined(HAVE_PTHREAD_ATFORK) && defined(HAVE___LIBC_ONCE)
__libc_once (__once, do_atfork_setup);
-#elif defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#elif defined(HAVE___LIBC_ONCE)
/*
* Only install the pthread_atfork() handlers i
* we are linked against libpthreads. Otherwise,
--- ldap-nss.h.orig 2012-10-17 12:33:05.681379283 +0000
+++ ldap-nss.h 2012-10-17 12:34:06.337050753 +0000
@@ -671,7 +671,7 @@
#define NSS_LDAP_LOCK(m) mutex_lock(&m)
#define NSS_LDAP_UNLOCK(m) mutex_unlock(&m)
#define NSS_LDAP_DEFINE_LOCK(m) static mutex_t m = DEFAULTMUTEX
-#elif defined(HAVE_LIBC_LOCK_H) || defined(HAVE_BITS_LIBC_LOCK_H)
+#elif defined(HAVE___LIBC_LOCK_LOCK) && defined(HAVE___LIBC_LOCK_UNLOCK)
#define NSS_LDAP_LOCK(m) __libc_lock_lock(m)
#define NSS_LDAP_UNLOCK(m) __libc_lock_unlock(m)
#define NSS_LDAP_DEFINE_LOCK(m) static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER
--- ldap-nss.c.orig 2012-10-17 12:58:20.270783283 +0000
+++ ldap-nss.c 2012-10-17 12:58:43.699267283 +0000
@@ -156,7 +156,7 @@
static FILE *__debugfile;
#endif /* LBER_OPT_LOG_PRINT_FILE */
-#ifndef HAVE_PTHREAD_ATFORK
+#if !defined(HAVE_PTHREAD_ATFORK) || !defined(HAVE___LIBC_ONCE)
/*
* Process ID that opened the session.
*/
--- configure.in.orig 2012-10-17 12:59:31.707235283 +0000
+++ configure.in 2012-10-17 13:00:15.854289283 +0000
@@ -255,6 +255,7 @@
AC_CHECK_FUNCS(pthread_once)
AC_CHECK_FUNCS(ether_aton)
AC_CHECK_FUNCS(ether_ntoa)
+AC_CHECK_FUNCS(__libc_once __libc_atfork __libc_lock_lock __libc_lock_unlock)
AC_MSG_CHECKING(for struct ether_addr)
AC_TRY_COMPILE([#include <sys/types.h>
--- ldap-nss.c.orig 2012-10-17 13:02:01.418010283 +0000
+++ ldap-nss.c 2012-10-17 13:03:25.017240283 +0000
@@ -1102,7 +1102,7 @@
do_init (void)
{
ldap_config_t *cfg;
-#ifndef HAVE_PTHREAD_ATFORK
+#if !defined(HAVE_PTHREAD_ATFORK) || !defined(HAVE___LIBC_ONCE)
pid_t pid;
#endif
uid_t euid;