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). */
36 int
__getrlimit64(enum __rlimit_resource resource,struct rlimit64 * rlimits)37 __getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
38 {
39 return INLINE_SYSCALL_CALL (prlimit64, 0, resource, NULL, rlimits);
40 }
41 libc_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. */
46 strong_alias (__getrlimit64, __GI_getrlimit)
47 strong_alias (__getrlimit64, __GI___getrlimit)
48 strong_alias (__getrlimit64, __getrlimit)
49 /* Alpha defines a versioned getrlimit{64}. */
50 # ifndef USE_VERSIONED_RLIMIT
51 weak_alias (__getrlimit64, getrlimit)
52 weak_alias (__getrlimit64, getrlimit64)
53 libc_hidden_weak (getrlimit64)
54 # else
55 weak_alias (__getrlimit64, __GI_getrlimit64)
56 # endif
57
58 #elif SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_2)
59 /* Back compatible 2GiB limited rlimit. */
60 extern int __new_getrlimit (enum __rlimit_resource, struct rlimit *)
61 attribute_hidden;
62
63 int
64 attribute_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 }
83 versioned_symbol (libc, __getrlimit64, getrlimit64, GLIBC_2_2);
84 compat_symbol (libc, __old_getrlimit64, getrlimit64, GLIBC_2_1);
85 #else
86 weak_alias (__getrlimit64, getrlimit64)
87 libc_hidden_weak (getrlimit64)
88 #endif /* __RLIM_T_MATCHES_RLIM64_T */
89