v2.4.4 audit sources

Change-Id: I9315a7408817db51edf084fb4d27fbb492785084
Signed-off-by: Ashlee Young <ashlee@wildernessvoice.com>

1 files changed, 140 insertions, 0 deletions

diff --git a/framework/src/audit/contrib/skeleton.c b/framework/src/audit/contrib/skeleton.c
new file mode 100644
index 00000000..7e041042
--- /dev/null
+++ b/framework/src/audit/contrib/skeleton.c
@@ -0,0 +1,140 @@
+/* skeleton.c --
+ * 
+ * This is a sample program that you can customize to create your own audit
+ * event handler. It will be started by auditd via the dispatcher option in
+ * /etc/audit/auditd.conf. This program can be built as follows:
+ *
+ * gcc skeleton.c -o skeleton -laudit
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <locale.h>
+#include "libaudit.h"
+
+
+// Local data
+static volatile int signaled = 0;
+static int pipe_fd;
+static const char *pgm = "skeleton";
+
+// Local functions
+static int event_loop(void);
+
+// SIGTERM handler
+static void term_handler( int sig )
+{
+	signaled = 1;
+}
+
+
+/*
+ * main is started by auditd. See dispatcher in auditd.conf
+ */
+int main(int argc, char *argv[])
+{
+	struct sigaction sa;
+
+	setlocale (LC_ALL, "");
+	openlog(pgm, LOG_PID, LOG_DAEMON);
+	syslog(LOG_NOTICE, "starting...");
+
+#ifndef DEBUG
+	// Make sure we are root
+	if (getuid() != 0) {
+		syslog(LOG_ERR, "You must be root to run this program.");
+		return 4;
+	}
+#endif
+
+	// register sighandlers
+	sa.sa_flags = 0 ;
+	sa.sa_handler = term_handler;
+	sigemptyset( &sa.sa_mask ) ;
+	sigaction( SIGTERM, &sa, NULL );
+	sa.sa_handler = term_handler;
+	sigemptyset( &sa.sa_mask ) ;
+	sigaction( SIGCHLD, &sa, NULL );
+	sa.sa_handler = SIG_IGN;
+	sigaction( SIGHUP, &sa, NULL );
+	(void)chdir("/");
+
+	// change over to pipe_fd
+	pipe_fd = dup(0);
+	close(0);
+	open("/dev/null", O_RDONLY);
+	fcntl(pipe_fd, F_SETFD, FD_CLOEXEC);
+
+	// Start the program
+	return event_loop();
+}
+
+static int event_loop(void)
+{
+	void *data;
+	struct iovec vec[2];
+	struct audit_dispatcher_header hdr;
+
+	// allocate data structures
+	data = malloc(MAX_AUDIT_MESSAGE_LENGTH);
+	if (data == NULL) {
+		syslog(LOG_ERR, "Cannot allocate buffer");
+		return 1;
+	}
+	memset(data, 0, MAX_AUDIT_MESSAGE_LENGTH);
+	memset(&hdr, 0, sizeof(hdr));
+
+	do {
+		int rc;
+		struct timeval tv;
+		fd_set fd;
+
+		tv.tv_sec = 1;
+		tv.tv_usec = 0;
+		FD_ZERO(&fd);
+		FD_SET(pipe_fd, &fd);
+		rc = select(pipe_fd+1, &fd, NULL, NULL, &tv);
+		if (rc == 0) 
+			continue;
+		 else if (rc == -1)
+			break;
+
+		/* Get header first. it is fixed size */
+		vec[0].iov_base = (void*)&hdr;
+		vec[0].iov_len = sizeof(hdr);
+		do {
+			rc = readv(fd, &vec[0], 1);
+		} while (rc < 0 && errno == EINTR);
+
+		if (rc > 0) {
+	        	// Next payload 
+			vec[1].iov_base = data;
+			vec[1].iov_len = hdr.size; 
+			do {
+				rc = readv(fd, &vec[1], 1);
+			} while (rc < 0 && errno == EINTR);
+		}
+		if (rc <= 0) {
+			syslog(LOG_ERR, "rc == %d(%s)", rc, strerror(errno));
+			continue;
+		}
+
+		// Handle events here. Just for illustration, we print
+		// to syslog, but you will want to do something else.
+		syslog(LOG_NOTICE,"type=%d, payload size=%d", 
+			hdr.type, hdr.size);
+		syslog(LOG_NOTICE,"data=\"%.*s\"", hdr.size,
+			(char *)data);
+
+	} while(!signaled);
+
+	return 0;
+}
+