--- /dev/null
+/*
+ * Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <libaudit.h>
+
+#include "missing.h"
+#include "error.h"
+#include "alloc.h"
+#include "linux_audit.h"
+
+/*
+ * Open audit connection if possible.
+ * Returns audit fd on success and -1 on failure.
+ */
+static int
+linux_audit_open(void)
+{
+ static int au_fd = -1;
+
+ if (au_fd != -1)
+ return au_fd;
+ au_fd = audit_open();
+ if (au_fd == -1) {
+ /* Kernel may not have audit support. */
+ if (errno != EINVAL && errno != EPROTONOSUPPORT && errno != EAFNOSUPPORT)
+ error(1, "unable to open audit system");
+ } else {
+ (void)fcntl(au_fd, F_SETFD, FD_CLOEXEC);
+ }
+ return au_fd;
+}
+
+int
+linux_audit_command(char *argv[], int result)
+{
+ int au_fd, rc;
+ char *command, *cp, **av;
+ size_t size, n;
+
+ if ((au_fd = linux_audit_open()) == -1)
+ return -1;
+
+ /* Convert argv to a flat string. */
+ for (size = 0, av = argv; *av != NULL; av++)
+ size += strlen(*av) + 1;
+ command = cp = emalloc(size);
+ for (av = argv; *av != NULL; av++) {
+ n = strlcpy(cp, *av, size - (cp - command));
+ if (n >= size - (cp - command))
+ errorx(1, "internal error, linux_audit_command() overflow");
+ cp += n;
+ *cp++ = ' ';
+ }
+ *--cp = '\0';
+
+ /* Log command, ignoring ECONNREFUSED on error. */
+ rc = audit_log_user_command(au_fd, AUDIT_USER_CMD, command, NULL, result);
+ if (rc <= 0 && errno != ECONNREFUSED)
+ warning("unable to send audit message");
+
+ efree(command);
+
+ return rc;
+}