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cef4decf JP |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify it | |
3 | * under the terms of the GNU General Public License as published by the | |
4 | * Free Software Foundation; either version 2, or (at your option) any | |
5 | * later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, but | |
8 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
10 | * General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License along | |
13 | * with this program; if not, write to the Free Software Foundation, Inc., | |
14 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
15 | */ | |
16 | ||
17 | #include <stdio.h> | |
18 | ||
19 | #include "caputils.h" | |
20 | #include "pathnames.h" | |
21 | ||
22 | int cap_last_cap(void) | |
23 | { | |
24 | /* CAP_LAST_CAP is untrustworthy. */ | |
25 | static int ret = -1; | |
26 | int matched; | |
27 | FILE *f; | |
28 | ||
29 | if (ret != -1) | |
30 | return ret; | |
31 | ||
32 | f = fopen(_PATH_PROC_CAPLASTCAP, "r"); | |
33 | if (!f) { | |
34 | ret = CAP_LAST_CAP; /* guess */ | |
35 | return ret; | |
36 | } | |
37 | ||
38 | matched = fscanf(f, "%d", &ret); | |
39 | fclose(f); | |
40 | ||
41 | if (matched != 1) | |
42 | ret = CAP_LAST_CAP; /* guess */ | |
43 | ||
44 | return ret; | |
45 | } |