69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/***
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This file is part of systemd.
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Copyright 2015 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "alloc-util.h"
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#include "macro.h"
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#include "parse-util.h"
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#include "proc-cmdline.h"
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#include "string-util.h"
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#include "volatile-util.h"
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VolatileMode volatile_mode_from_string(const char *s) {
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int b;
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if (isempty(s))
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return _VOLATILE_MODE_INVALID;
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b = parse_boolean(s);
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if (b > 0)
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return VOLATILE_YES;
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if (b == 0)
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return VOLATILE_NO;
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if (streq(s, "state"))
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return VOLATILE_STATE;
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return _VOLATILE_MODE_INVALID;
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}
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int query_volatile_mode(VolatileMode *ret) {
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_cleanup_free_ char *mode = NULL;
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VolatileMode m = VOLATILE_NO;
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int r;
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r = proc_cmdline_get_key("systemd.volatile", PROC_CMDLINE_VALUE_OPTIONAL, &mode);
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if (r < 0)
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return r;
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if (r == 0)
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goto finish;
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if (mode) {
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m = volatile_mode_from_string(mode);
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if (m < 0)
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return -EINVAL;
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} else
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m = VOLATILE_YES;
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r = 1;
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finish:
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*ret = m;
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return r;
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}
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