1/* Linux getrlimit64 implementation (64 bits rlim_t).
2 Copyright (C) 2010-2021 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 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <sys/types.h>
21#include <sysdep.h>
22#include <shlib-compat.h>
23
24/* Add this redirection so the strong_alias for __RLIM_T_MATCHES_RLIM64_T
25 linking getrlimit64 to {__}getrlimit does not throw a type error. */
26#undef getrlimit
27#undef __getrlimit
28#define getrlimit getrlimit_redirect
29#define __getrlimit __getrlimit_redirect
30#include <sys/resource.h>
31#undef getrlimit
32#undef __getrlimit
33
34/* Put the soft and hard limits for RESOURCE in *RLIMITS.
35 Returns 0 if successful, -1 if not (and sets errno). */
36int
37__getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
38{
39 return INLINE_SYSCALL_CALL (prlimit64, 0, resource, NULL, rlimits);
40}
41libc_hidden_def (__getrlimit64)
42
43#if __RLIM_T_MATCHES_RLIM64_T
44/* If both rlim_t and rlimt64_t are essentially the same type we can use
45 alias both interfaces. */
46strong_alias (__getrlimit64, __GI_getrlimit)
47strong_alias (__getrlimit64, __GI___getrlimit)
48strong_alias (__getrlimit64, __getrlimit)
49/* Alpha defines a versioned getrlimit{64}. */
50# ifndef USE_VERSIONED_RLIMIT
51weak_alias (__getrlimit64, getrlimit)
52weak_alias (__getrlimit64, getrlimit64)
53libc_hidden_weak (getrlimit64)
54# else
55weak_alias (__getrlimit64, __GI_getrlimit64)
56# endif
57
58#elif SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_2)
59/* Back compatible 2GiB limited rlimit. */
60extern int __new_getrlimit (enum __rlimit_resource, struct rlimit *)
61 attribute_hidden;
62
63int
64attribute_compat_text_section
65__old_getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
66{
67 struct rlimit rlimits32;
68
69 if (__new_getrlimit (resource, &rlimits32) < 0)
70 return -1;
71
72 if (rlimits32.rlim_cur == RLIM_INFINITY)
73 rlimits->rlim_cur = RLIM64_INFINITY >> 1;
74 else
75 rlimits->rlim_cur = rlimits32.rlim_cur;
76 if (rlimits32.rlim_max == RLIM_INFINITY)
77 rlimits->rlim_max = RLIM64_INFINITY >> 1;
78 else
79 rlimits->rlim_max = rlimits32.rlim_max;
80
81 return 0;
82}
83versioned_symbol (libc, __getrlimit64, getrlimit64, GLIBC_2_2);
84compat_symbol (libc, __old_getrlimit64, getrlimit64, GLIBC_2_1);
85#else
86weak_alias (__getrlimit64, getrlimit64)
87libc_hidden_weak (getrlimit64)
88#endif /* __RLIM_T_MATCHES_RLIM64_T */
89