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authorUlrich Drepper <drepper@redhat.com>2005-06-14 22:52:30 +0000
committerUlrich Drepper <drepper@redhat.com>2005-06-14 22:52:30 +0000
commitec23b9bece4780a2031eedf23019cbb229e855fb (patch)
treec4a5eb2239fc514124a9ffae30ed7530239d1a5f
parent0e66ade5ada897fe4b8be8d9c05c5519e7be4199 (diff)
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* configure.in: Add test for availability of libaudit.
* config.h.in: Define HAVE_LIBAUDIT. * config.make.in: Define have-libaudit. * nscd/Makefile: If libaudit is available, link nscd with it. * nscd/selinux.c: If HAVE_LIBAUDIT is defined, log using libaudit. Patch by Steve Grubb <sgrubb@redhat.com>.
-rw-r--r--ChangeLog7
-rw-r--r--config.h.in3
-rw-r--r--config.make.in1
-rw-r--r--configure.in8
-rw-r--r--nscd/Makefile6
-rw-r--r--nscd/selinux.c43
6 files changed, 67 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 38071b4..711ae2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
2005-06-14 Ulrich Drepper <drepper@redhat.com>
+ * configure.in: Add test for availability of libaudit.
+ * config.h.in: Define HAVE_LIBAUDIT.
+ * config.make.in: Define have-libaudit.
+ * nscd/Makefile: If libaudit is available, link nscd with it.
+ * nscd/selinux.c: If HAVE_LIBAUDIT is defined, log using libaudit.
+ Patch by Steve Grubb <sgrubb@redhat.com>.
+
* debug/pread64_chk.c: Use __libc_pread64 instead of __pread64.
* sysdeps/posix/posix_fallocate64.c: Likewise.
* include/string.h: Use libc_hidden_proto for strnlen.
diff --git a/config.h.in b/config.h.in
index db3defc..5406d41 100644
--- a/config.h.in
+++ b/config.h.in
@@ -21,6 +21,9 @@
/* Define if building with SELinux support. Set by --with-selinux. */
#undef HAVE_SELINUX
+/* Defined if building with SELinux support & audit libs are detected. */
+#undef HAVE_LIBAUDIT
+
/* Define if using XCOFF. Set by --with-xcoff. */
#undef HAVE_XCOFF
diff --git a/config.make.in b/config.make.in
index 1bd025e..1ab4bfb 100644
--- a/config.make.in
+++ b/config.make.in
@@ -59,6 +59,7 @@ enable-check-abi = @enable_check_abi@
have-forced-unwind = @libc_cv_forced_unwind@
have-fpie = @libc_cv_fpie@
have-selinux = @have_selinux@
+have-libaudit = @have_libaudit@
have-cc-with-libunwind = @libc_cv_cc_with_libunwind@
fno-unit-at-a-time = @fno_unit_at_a_time@
bind-now = @bindnow@
diff --git a/configure.in b/configure.in
index 503611a..5f46b5e 100644
--- a/configure.in
+++ b/configure.in
@@ -1938,6 +1938,14 @@ fi
# Check if we're building with SELinux support.
if test "x$have_selinux" = xyes; then
AC_DEFINE(HAVE_SELINUX,1,[SELinux support])
+
+ # See if we have the libaudit library
+ AC_CHECK_LIB(audit, audit_log_avc,
+ have_libaudit=yes, have_libaudit=no)
+ if test "x$have_libaudit" = xyes; then
+ AC_DEFINE(HAVE_LIBAUDIT,1,[SELinux libaudit support])
+ fi
+ AC_SUBST(have_libaudit)
fi
AC_SUBST(have_selinux)
diff --git a/nscd/Makefile b/nscd/Makefile
index 7e0c4eb..2ebd90b 100644
--- a/nscd/Makefile
+++ b/nscd/Makefile
@@ -53,8 +53,12 @@ endif
all-nscd-modules := $(nscd-modules) selinux
ifeq (yes,$(have-selinux))
+ifeq (yes,$(have-libaudit))
+libaudit = -laudit
+endif
+
nscd-modules += selinux
-selinux-LIBS := -lselinux
+selinux-LIBS := -lselinux $(libaudit)
endif
LDLIBS-nscd = $(selinux-LIBS)
diff --git a/nscd/selinux.c b/nscd/selinux.c
index f57f092..4dc4df3 100644
--- a/nscd/selinux.c
+++ b/nscd/selinux.c
@@ -18,6 +18,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+#include "config.h"
#include <error.h>
#include <errno.h>
#include <libintl.h>
@@ -30,6 +31,9 @@
#include <selinux/avc.h>
#include <selinux/flask.h>
#include <selinux/selinux.h>
+#ifdef HAVE_LIBAUDIT
+#include <libaudit.h>
+#endif
#include "dbg_log.h"
#include "selinux.h"
@@ -66,6 +70,11 @@ static struct avc_entry_ref aeref;
/* Thread to listen for SELinux status changes via netlink. */
static pthread_t avc_notify_thread;
+#ifdef HAVE_LIBAUDIT
+/* Prototype for supporting the audit daemon */
+static void log_callback (const char *fmt, ...);
+#endif
+
/* Prototypes for AVC callback functions. */
static void *avc_create_thread (void (*run) (void));
static void avc_stop_thread (void *thread);
@@ -77,7 +86,11 @@ static void avc_free_lock (void *lock);
/* AVC callback structures for use in avc_init. */
static const struct avc_log_callback log_cb =
{
+#ifdef HAVE_LIBAUDIT
+ .func_log = log_callback,
+#else
.func_log = dbg_log,
+#endif
.func_audit = NULL
};
static const struct avc_thread_callback thread_cb =
@@ -93,6 +106,30 @@ static const struct avc_lock_callback lock_cb =
.func_free_lock = avc_free_lock
};
+#ifdef HAVE_LIBAUDIT
+/* The audit system's netlink socket descriptor */
+static int audit_fd = -1;
+
+/* When an avc denial occurs, log it to audit system */
+static void
+log_callback (const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start (ap, fmt);
+ audit_log_avc (audit_fd, AUDIT_USER_AVC, fmt, ap);
+ va_end (ap);
+}
+
+/* Initialize the connection to the audit system */
+static void
+audit_init (void)
+{
+ audit_fd = audit_open ();
+ if (audit_fd < 0)
+ dbg_log (_("Failed opening connection to the audit subsystem"));
+}
+#endif /* HAVE_LIBAUDIT */
/* Determine if we are running on an SELinux kernel. Set selinux_enabled
to the result. */
@@ -182,6 +219,9 @@ nscd_avc_init (void)
error (EXIT_FAILURE, errno, _("Failed to start AVC"));
else
dbg_log (_("Access Vector Cache (AVC) started"));
+#ifdef HAVE_LIBAUDIT
+ audit_init ();
+#endif
}
@@ -262,6 +302,9 @@ void
nscd_avc_destroy (void)
{
avc_destroy ();
+#ifdef HAVE_LIBAUDIT
+ audit_close (audit_fd);
+#endif
}
#endif /* HAVE_SELINUX */