| 1 | /* Linux getrlimit64 implementation (64 bits rlim_t). |
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| 2 | Copyright (C) 2010-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <errno.h> |
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| 20 | #include <sys/types.h> |
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| 21 | #include <sysdep.h> |
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| 22 | #include <shlib-compat.h> |
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| 23 | |
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| 24 | /* Add this redirection so the strong_alias for __RLIM_T_MATCHES_RLIM64_T |
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| 25 | linking getrlimit64 to {__}getrlimit does not throw a type error. */ |
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| 26 | #undef getrlimit |
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| 27 | #undef __getrlimit |
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| 28 | #define getrlimit getrlimit_redirect |
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| 29 | #define __getrlimit __getrlimit_redirect |
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| 30 | #include <sys/resource.h> |
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| 31 | #undef getrlimit |
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| 32 | #undef __getrlimit |
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| 33 | |
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| 34 | /* Put the soft and hard limits for RESOURCE in *RLIMITS. |
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| 35 | Returns 0 if successful, -1 if not (and sets errno). */ |
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| 36 | int |
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| 37 | __getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits) |
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| 38 | { |
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| 39 | return INLINE_SYSCALL_CALL (prlimit64, 0, resource, NULL, rlimits); |
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| 40 | } |
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| 41 | libc_hidden_def (__getrlimit64) |
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| 42 | |
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| 43 | #if __RLIM_T_MATCHES_RLIM64_T |
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| 44 | /* If both rlim_t and rlimt64_t are essentially the same type we can use |
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| 45 | alias both interfaces. */ |
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| 46 | strong_alias (__getrlimit64, __GI_getrlimit) |
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| 47 | strong_alias (__getrlimit64, __GI___getrlimit) |
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| 48 | strong_alias (__getrlimit64, __getrlimit) |
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| 49 | /* Alpha defines a versioned getrlimit{64}. */ |
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| 50 | # ifndef USE_VERSIONED_RLIMIT |
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| 51 | weak_alias (__getrlimit64, getrlimit) |
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| 52 | weak_alias (__getrlimit64, getrlimit64) |
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| 53 | libc_hidden_weak (getrlimit64) |
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| 54 | # else |
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| 55 | weak_alias (__getrlimit64, __GI_getrlimit64) |
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| 56 | # endif |
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| 57 | |
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| 58 | #elif SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_2) |
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| 59 | /* Back compatible 2GiB limited rlimit. */ |
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| 60 | extern int __new_getrlimit (enum __rlimit_resource, struct rlimit *) |
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| 61 | attribute_hidden; |
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| 62 | |
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| 63 | int |
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| 64 | attribute_compat_text_section |
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| 65 | __old_getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits) |
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| 66 | { |
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| 67 | struct rlimit rlimits32; |
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| 68 | |
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| 69 | if (__new_getrlimit (resource, &rlimits32) < 0) |
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| 70 | return -1; |
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| 71 | |
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| 72 | if (rlimits32.rlim_cur == RLIM_INFINITY) |
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| 73 | rlimits->rlim_cur = RLIM64_INFINITY >> 1; |
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| 74 | else |
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| 75 | rlimits->rlim_cur = rlimits32.rlim_cur; |
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| 76 | if (rlimits32.rlim_max == RLIM_INFINITY) |
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| 77 | rlimits->rlim_max = RLIM64_INFINITY >> 1; |
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| 78 | else |
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| 79 | rlimits->rlim_max = rlimits32.rlim_max; |
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| 80 | |
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| 81 | return 0; |
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| 82 | } |
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| 83 | versioned_symbol (libc, __getrlimit64, getrlimit64, GLIBC_2_2); |
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| 84 | compat_symbol (libc, __old_getrlimit64, getrlimit64, GLIBC_2_1); |
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| 85 | #else |
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| 86 | weak_alias (__getrlimit64, getrlimit64) |
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| 87 | libc_hidden_weak (getrlimit64) |
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| 88 | #endif /* __RLIM_T_MATCHES_RLIM64_T */ |
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| 89 | |
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