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-rw-r--r--lib/common/Makemodule.am1
-rw-r--r--lib/common/filename_sane.c26
2 files changed, 27 insertions, 0 deletions
diff --git a/lib/common/Makemodule.am b/lib/common/Makemodule.am
index db366af..4f4562b 100644
--- a/lib/common/Makemodule.am
+++ b/lib/common/Makemodule.am
@@ -6,5 +6,6 @@ libcommon_a_SOURCES += lib/common/data_writer.c include/common.h
libcommon_a_SOURCES += lib/common/get_path.c lib/common/io_stdin.c
libcommon_a_SOURCES += lib/common/writer.c lib/common/perror.c
libcommon_a_SOURCES += lib/common/dirstack.c lib/common/mkdir_p.c
+libcommon_a_SOURCES += lib/common/filename_sane.c
noinst_LIBRARIES += libcommon.a
diff --git a/lib/common/filename_sane.c b/lib/common/filename_sane.c
new file mode 100644
index 0000000..6b497c3
--- /dev/null
+++ b/lib/common/filename_sane.c
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * filename_sane.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "common.h"
+
+bool is_filename_sane(const char *name)
+{
+ if (name[0] == '.') {
+ if (name[1] == '\0')
+ return false;
+
+ if (name[1] == '.' && name[2] == '\0')
+ return false;
+ }
+
+ while (*name != '\0') {
+ if (*name == '/')
+ return false;
+ ++name;
+ }
+
+ return true;
+}