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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2015 Lennart Poettering
***/
#include <errno.h>
#include "alloc-util.h"
#include "macro.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "string-util.h"
#include "volatile-util.h"
VolatileMode volatile_mode_from_string(const char *s) {
int b;
if (isempty(s))
return _VOLATILE_MODE_INVALID;
b = parse_boolean(s);
if (b > 0)
return VOLATILE_YES;
if (b == 0)
return VOLATILE_NO;
if (streq(s, "state"))
return VOLATILE_STATE;
return _VOLATILE_MODE_INVALID;
}
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;
}
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