Port of libselinux to Android.
diff --git a/src/compute_av.c b/src/compute_av.c
new file mode 100644
index 0000000..8c01fd0
--- /dev/null
+++ b/src/compute_av.c
@@ -0,0 +1,72 @@
+#include <unistd.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <limits.h>
+#include "selinux_internal.h"
+#include "policy.h"
+#include "mapping.h"
+
+int security_compute_av(const security_context_t scon,
+ const security_context_t tcon,
+ security_class_t tclass,
+ access_vector_t requested,
+ struct av_decision *avd)
+{
+ char path[PATH_MAX];
+ char *buf;
+ size_t len;
+ int fd, ret;
+
+ if (!selinux_mnt) {
+ errno = ENOENT;
+ return -1;
+ }
+
+ snprintf(path, sizeof path, "%s/access", selinux_mnt);
+ fd = open(path, O_RDWR);
+ if (fd < 0)
+ return -1;
+
+ len = selinux_page_size;
+ buf = malloc(len);
+ if (!buf) {
+ ret = -1;
+ goto out;
+ }
+
+ snprintf(buf, len, "%s %s %hu %x", scon, tcon,
+ unmap_class(tclass), unmap_perm(tclass, requested));
+
+ ret = write(fd, buf, strlen(buf));
+ if (ret < 0)
+ goto out2;
+
+ memset(buf, 0, len);
+ ret = read(fd, buf, len - 1);
+ if (ret < 0)
+ goto out2;
+
+ ret = sscanf(buf, "%x %x %x %x %u %x",
+ &avd->allowed, &avd->decided,
+ &avd->auditallow, &avd->auditdeny,
+ &avd->seqno, &avd->flags);
+ if (ret < 5) {
+ ret = -1;
+ goto out2;
+ } else if (ret < 6)
+ avd->flags = 0;
+
+ map_decision(tclass, avd);
+
+ ret = 0;
+ out2:
+ free(buf);
+ out:
+ close(fd);
+ return ret;
+}
+