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695d7d138e
This patch makes sysdeps/unix/sysv/linux code assume the prlimit64 syscall is always available, given the minimum of a 3.2 kernel. __ASSUME_PRLIMIT64, which in fact was no longer used, is removed. Code conditional on __NR_prlimit64 being defined is made unconditional. Fallback code for the case where prlimit64 produces an ENOSYS error is removed, substantially simplifying some functions. Tested for x86_64 and x86. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_PRLIMIT64): Remove macro. * sysdeps/unix/sysv/linux/getrlimit64.c (__getrlimit64): Assume prlimit64 is always available and does not give an ENOSYS error. * sysdeps/unix/sysv/linux/prlimit.c [__NR_prlimit64]: Make code unconditional. [!__NR_prlimit64]: Remove conditional code. * sysdeps/unix/sysv/linux/setrlimit.c (__setrlimit): Assume prlimit64 is always available and does not give an ENOSYS error. * sysdeps/unix/sysv/linux/setrlimit64.c (__setrlimit64): Likewise.
88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/* Linux getrlimit64 implementation (64 bits rlim_t).
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Copyright (C) 2010-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/types.h>
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#include <shlib-compat.h>
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/* Add this redirection so the strong_alias for __RLIM_T_MATCHES_RLIM64_T
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linking getlimit64 to {__}getrlimit does not throw a type error. */
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#undef getrlimit
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#undef __getrlimit
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#define getrlimit getrlimit_redirect
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#define __getrlimit __getrlimit_redirect
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#include <sys/resource.h>
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#undef getrlimit
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#undef __getrlimit
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/* Put the soft and hard limits for RESOURCE in *RLIMITS.
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Returns 0 if successful, -1 if not (and sets errno). */
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int
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__getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
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{
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return INLINE_SYSCALL_CALL (prlimit64, 0, resource, NULL, rlimits);
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}
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libc_hidden_def (__getrlimit64)
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#if __RLIM_T_MATCHES_RLIM64_T
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/* If both rlim_t and rlimt64_t are essentially the same type we can use
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alias both interfaces. */
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strong_alias (__getrlimit64, __GI_getrlimit)
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strong_alias (__getrlimit64, __GI___getrlimit)
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strong_alias (__getrlimit64, __getrlimit)
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weak_alias (__getrlimit64, getrlimit)
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/* And there is no need for compat symbols. */
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# undef SHLIB_COMPAT
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# define SHLIB_COMPAT(a, b, c) 0
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#endif
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#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_2)
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/* Back compatible 2GiB limited rlimit. */
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extern int __new_getrlimit (enum __rlimit_resource, struct rlimit *);
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int
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attribute_compat_text_section
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__old_getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
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{
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# if __RLIM_T_MATCHES_RLIM64_T
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# define rlimits32 (*rlimits)
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# else
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struct rlimit rlimits32;
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# endif
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if (__new_getrlimit (resource, &rlimits32) < 0)
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return -1;
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if (rlimits32.rlim_cur == RLIM_INFINITY)
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rlimits->rlim_cur = RLIM64_INFINITY >> 1;
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else
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rlimits->rlim_cur = rlimits32.rlim_cur;
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if (rlimits32.rlim_max == RLIM_INFINITY)
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rlimits->rlim_max = RLIM64_INFINITY >> 1;
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else
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rlimits->rlim_max = rlimits32.rlim_max;
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return 0;
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}
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versioned_symbol (libc, __getrlimit64, getrlimit64, GLIBC_2_2);
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compat_symbol (libc, __old_getrlimit64, getrlimit64, GLIBC_2_1);
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#else
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weak_alias (__getrlimit64, getrlimit64)
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libc_hidden_weak (getrlimit64)
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#endif
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