/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include "alloc-util.h"

#include "proc-cmdline.h"

#include "string-table.h"

#include "volatile-util.h"

int query_volatile_mode(VolatileMode *ret) {

        _cleanup_free_ char *mode = NULL;

        int r;

        r = proc_cmdline_get_key("systemd.volatile", PROC_CMDLINE_VALUE_OPTIONAL, &mode);

        if (r < 0)

                return r;

        if (r == 0) {

                *ret = VOLATILE_NO;

                return 0;

        }

        if (mode) {

                VolatileMode m;

                m = volatile_mode_from_string(mode);

                if (m < 0)

                        return m;

                *ret = m;

        } else

                *ret = VOLATILE_YES;

        return 1;

}

static const char* const volatile_mode_table[_VOLATILE_MODE_MAX] = {

        [VOLATILE_NO] = "no",

        [VOLATILE_YES] = "yes",

        [VOLATILE_STATE] = "state",

        [VOLATILE_OVERLAY] = "overlay",

};

DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(volatile_mode, VolatileMode, VOLATILE_YES);