1 files changed, 45 insertions, 0 deletions
diff --git a/lib/caputils.c b/lib/caputils.c
new file mode 100644
index 0000000..17e9c01
--- /dev/null
+++ b/lib/caputils.c
@@ -0,0 +1,45 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+
+#include "caputils.h"
+#include "pathnames.h"
+
+int cap_last_cap(void)
+{
+	/* CAP_LAST_CAP is untrustworthy. */
+	static int ret = -1;
+	int matched;
+	FILE *f;
+
+	if (ret != -1)
+		return ret;
+
+	f = fopen(_PATH_PROC_CAPLASTCAP, "r");
+	if (!f) {
+		ret = CAP_LAST_CAP;	/* guess */
+		return ret;
+	}
+
+	matched = fscanf(f, "%d", &ret);
+	fclose(f);
+
+	if (matched != 1)
+		ret = CAP_LAST_CAP;	/* guess */
+
+	return ret;
+}