1 files changed, 44 insertions, 0 deletions
diff --git a/src/shared/volatile-util.c b/src/shared/volatile-util.c
new file mode 100644
index 0000000..4d75bc0
--- /dev/null
+++ b/src/shared/volatile-util.c
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+
+#include "alloc-util.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "proc-cmdline.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "volatile-util.h"
+
+int query_volatile_mode(VolatileMode *ret) {
+        _cleanup_free_ char *mode = NULL;
+        VolatileMode m = VOLATILE_NO;
+        int r;
+
+        r = proc_cmdline_get_key("systemd.volatile", PROC_CMDLINE_VALUE_OPTIONAL, &mode);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                goto finish;
+
+        if (mode) {
+                m = volatile_mode_from_string(mode);
+                if (m < 0)
+                        return -EINVAL;
+        } else
+                m = VOLATILE_YES;
+
+        r = 1;
+
+finish:
+        *ret = m;
+        return r;
+}
+
+static const char* const volatile_mode_table[_VOLATILE_MODE_MAX] = {
+        [VOLATILE_NO] = "no",
+        [VOLATILE_YES] = "yes",
+        [VOLATILE_STATE] = "state",
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(volatile_mode, VolatileMode, VOLATILE_YES);