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). */
36int
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}
70weak_alias (__setrlimit64, setrlimit64)
71
72#if __RLIM_T_MATCHES_RLIM64_T
73strong_alias (__setrlimit64, __setrlimit)
74weak_alias (__setrlimit64, setrlimit)
75#endif
76