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a4c35b6b LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2015 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
91214a37 | 20 | #include "alloc-util.h" |
a4c35b6b LP |
21 | #include "macro.h" |
22 | #include "parse-util.h" | |
91214a37 | 23 | #include "proc-cmdline.h" |
a4c35b6b LP |
24 | #include "string-util.h" |
25 | #include "volatile-util.h" | |
26 | ||
27 | VolatileMode volatile_mode_from_string(const char *s) { | |
28 | int b; | |
29 | ||
30 | if (isempty(s)) | |
31 | return _VOLATILE_MODE_INVALID; | |
32 | ||
33 | b = parse_boolean(s); | |
34 | if (b > 0) | |
35 | return VOLATILE_YES; | |
36 | if (b == 0) | |
37 | return VOLATILE_NO; | |
38 | ||
39 | if (streq(s, "state")) | |
40 | return VOLATILE_STATE; | |
41 | ||
42 | return _VOLATILE_MODE_INVALID; | |
43 | } | |
91214a37 LP |
44 | |
45 | int query_volatile_mode(VolatileMode *ret) { | |
46 | _cleanup_free_ char *mode = NULL; | |
47 | VolatileMode m = VOLATILE_NO; | |
48 | int r; | |
49 | ||
50 | r = proc_cmdline_get_key("systemd.volatile", PROC_CMDLINE_VALUE_OPTIONAL, &mode); | |
51 | if (r < 0) | |
52 | return r; | |
53 | if (r == 0) | |
54 | goto finish; | |
55 | ||
56 | if (mode) { | |
57 | m = volatile_mode_from_string(mode); | |
58 | if (m < 0) | |
59 | return -EINVAL; | |
60 | } else | |
61 | m = VOLATILE_YES; | |
62 | ||
63 | r = 1; | |
64 | ||
65 | finish: | |
66 | *ret = m; | |
67 | return r; | |
68 | } |