1 | /* Linux setrlimit64 implementation (64 bits off_t). |
2 | Copyright (C) 2010-2017 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <errno.h> |
20 | #include <sys/types.h> |
21 | #include <shlib-compat.h> |
22 | |
23 | /* Add this redirection so the strong_alias for __RLIM_T_MATCHES_RLIM64_T |
24 | linking setlimit64 to {__}setrlimit does not throw a type error. */ |
25 | #undef settrlimit |
26 | #undef __sttrlimit |
27 | #define setrlimit setrlimit_redirect |
28 | #define __setrlimit __setrlimit_redirect |
29 | #include <sys/resource.h> |
30 | #undef setrlimit |
31 | #undef __setrlimit |
32 | |
33 | /* Set the soft and hard limits for RESOURCE to *RLIMITS. |
34 | Only the super-user can increase hard limits. |
35 | Return 0 if successful, -1 if not (and sets errno). */ |
36 | int |
37 | __setrlimit64 (enum __rlimit_resource resource, const struct rlimit64 *rlimits) |
38 | { |
39 | int res; |
40 | |
41 | #ifdef __NR_prlimit64 |
42 | res = INLINE_SYSCALL_CALL (prlimit64, 0, resource, rlimits, NULL); |
43 | if (res == 0 || errno != ENOSYS) |
44 | return res; |
45 | #endif |
46 | |
47 | /* The fallback code only makes sense if the platform supports |
48 | __NR_setrlimit. */ |
49 | #ifdef __NR_setrlimit |
50 | # if !__RLIM_T_MATCHES_RLIM64_T |
51 | struct rlimit rlimits32; |
52 | |
53 | if (rlimits->rlim_cur >= RLIM_INFINITY) |
54 | rlimits32.rlim_cur = RLIM_INFINITY; |
55 | else |
56 | rlimits32.rlim_cur = rlimits->rlim_cur; |
57 | if (rlimits->rlim_max >= RLIM_INFINITY) |
58 | rlimits32.rlim_max = RLIM_INFINITY; |
59 | else |
60 | rlimits32.rlim_max = rlimits->rlim_max; |
61 | # else |
62 | # define rlimits32 (*rlimits) |
63 | # endif |
64 | |
65 | res = INLINE_SYSCALL_CALL (setrlimit, resource, &rlimits32); |
66 | #endif |
67 | |
68 | return res; |
69 | } |
70 | weak_alias (__setrlimit64, setrlimit64) |
71 | |
72 | #if __RLIM_T_MATCHES_RLIM64_T |
73 | strong_alias (__setrlimit64, __setrlimit) |
74 | weak_alias (__setrlimit64, setrlimit) |
75 | #endif |
76 | |