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-rw-r--r--lib/compat/selinux.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/lib/compat/selinux.c b/lib/compat/selinux.c
new file mode 100644
index 0000000..7d3b33a
--- /dev/null
+++ b/lib/compat/selinux.c
@@ -0,0 +1,85 @@
+/*
+ * libcompat - system compatibility library
+ *
+ * Based on code from libselinux, Public Domain.
+ * Copyright © 2014 Guillem Jover <guillem@debian.org>
+ *
+ * This 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+#include <selinux/selinux.h>
+#include <selinux/context.h>
+
+#include "compat.h"
+
+int
+setexecfilecon(const char *filename, const char *fallback)
+{
+ int rc;
+
+ security_context_t curcon = NULL, newcon = NULL, filecon = NULL;
+ security_class_t seclass;
+ context_t tmpcon = NULL;
+
+ if (is_selinux_enabled() < 1)
+ return 0;
+
+ rc = getcon(&curcon);
+ if (rc < 0)
+ goto out;
+
+ rc = getfilecon(filename, &filecon);
+ if (rc < 0)
+ goto out;
+
+ seclass = string_to_security_class("process");
+ if (seclass == 0)
+ goto out;
+
+ rc = security_compute_create(curcon, filecon, seclass, &newcon);
+ if (rc < 0)
+ goto out;
+
+ if (strcmp(curcon, newcon) == 0) {
+ /* No default transition, use fallback for now. */
+ rc = -1;
+ tmpcon = context_new(curcon);
+ if (tmpcon == NULL)
+ goto out;
+ if (context_type_set(tmpcon, fallback))
+ goto out;
+ freecon(newcon);
+ newcon = strdup(context_str(tmpcon));
+ if (newcon == NULL)
+ goto out;
+ }
+
+ rc = setexeccon(newcon);
+
+out:
+ if (rc < 0 && security_getenforce() == 0)
+ rc = 0;
+
+ context_free(tmpcon);
+ freecon(newcon);
+ freecon(curcon);
+ freecon(filecon);
+
+ return rc;
+}