1/* Linux getrlimit64 implementation (64 bits rlim_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 getlimit64 to {__}getrlimit does not throw a type error. */
25#undef getrlimit
26#undef __getrlimit
27#define getrlimit getrlimit_redirect
28#define __getrlimit __getrlimit_redirect
29#include <sys/resource.h>
30#undef getrlimit
31#undef __getrlimit
32
33/* Put the soft and hard limits for RESOURCE in *RLIMITS.
34 Returns 0 if successful, -1 if not (and sets errno). */
35int
36__getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
37{
38 return INLINE_SYSCALL_CALL (prlimit64, 0, resource, NULL, rlimits);
39}
40libc_hidden_def (__getrlimit64)
41
42#if __RLIM_T_MATCHES_RLIM64_T
43/* If both rlim_t and rlimt64_t are essentially the same type we can use
44 alias both interfaces. */
45strong_alias (__getrlimit64, __GI_getrlimit)
46strong_alias (__getrlimit64, __GI___getrlimit)
47strong_alias (__getrlimit64, __getrlimit)
48weak_alias (__getrlimit64, getrlimit)
49/* And there is no need for compat symbols. */
50# undef SHLIB_COMPAT
51# define SHLIB_COMPAT(a, b, c) 0
52#endif
53
54#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_2)
55/* Back compatible 2GiB limited rlimit. */
56extern int __new_getrlimit (enum __rlimit_resource, struct rlimit *);
57
58int
59attribute_compat_text_section
60__old_getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
61{
62# if __RLIM_T_MATCHES_RLIM64_T
63# define rlimits32 (*rlimits)
64# else
65 struct rlimit rlimits32;
66# endif
67
68 if (__new_getrlimit (resource, &rlimits32) < 0)
69 return -1;
70
71 if (rlimits32.rlim_cur == RLIM_INFINITY)
72 rlimits->rlim_cur = RLIM64_INFINITY >> 1;
73 else
74 rlimits->rlim_cur = rlimits32.rlim_cur;
75 if (rlimits32.rlim_max == RLIM_INFINITY)
76 rlimits->rlim_max = RLIM64_INFINITY >> 1;
77 else
78 rlimits->rlim_max = rlimits32.rlim_max;
79
80 return 0;
81}
82versioned_symbol (libc, __getrlimit64, getrlimit64, GLIBC_2_2);
83compat_symbol (libc, __old_getrlimit64, getrlimit64, GLIBC_2_1);
84#else
85weak_alias (__getrlimit64, getrlimit64)
86libc_hidden_weak (getrlimit64)
87#endif
88