mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 08:40:07 +00:00
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.
75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/* Copyright (C) 2010-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/syscall.h>
|
|
|
|
|
|
int
|
|
prlimit (__pid_t pid, enum __rlimit_resource resource,
|
|
const struct rlimit *new_rlimit, struct rlimit *old_rlimit)
|
|
{
|
|
struct rlimit64 new_rlimit64_mem;
|
|
struct rlimit64 *new_rlimit64 = NULL;
|
|
struct rlimit64 old_rlimit64_mem;
|
|
struct rlimit64 *old_rlimit64 = (old_rlimit != NULL
|
|
? &old_rlimit64_mem : NULL);
|
|
|
|
if (new_rlimit != NULL)
|
|
{
|
|
if (new_rlimit->rlim_cur == RLIM_INFINITY)
|
|
new_rlimit64_mem.rlim_cur = RLIM64_INFINITY;
|
|
else
|
|
new_rlimit64_mem.rlim_cur = new_rlimit->rlim_cur;
|
|
if (new_rlimit->rlim_max == RLIM_INFINITY)
|
|
new_rlimit64_mem.rlim_max = RLIM64_INFINITY;
|
|
else
|
|
new_rlimit64_mem.rlim_max = new_rlimit->rlim_max;
|
|
new_rlimit64 = &new_rlimit64_mem;
|
|
}
|
|
|
|
int res = INLINE_SYSCALL (prlimit64, 4, pid, resource, new_rlimit64,
|
|
old_rlimit64);
|
|
|
|
if (res == 0 && old_rlimit != NULL)
|
|
{
|
|
/* The prlimit64 syscall is ill-designed for 32-bit machines.
|
|
We have to provide a 32-bit variant since otherwise the LFS
|
|
system would not work. But what shall we do if the syscall
|
|
succeeds but the old values do not fit into a rlimit
|
|
structure? We cannot return an error because the operation
|
|
itself worked. Best is perhaps to return RLIM_INFINITY. */
|
|
old_rlimit->rlim_cur = old_rlimit64_mem.rlim_cur;
|
|
if (old_rlimit->rlim_cur != old_rlimit64_mem.rlim_cur)
|
|
{
|
|
if (new_rlimit == NULL)
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
|
|
old_rlimit->rlim_cur = RLIM_INFINITY;
|
|
}
|
|
old_rlimit->rlim_max = old_rlimit64_mem.rlim_max;
|
|
if (old_rlimit->rlim_max != old_rlimit64_mem.rlim_max)
|
|
{
|
|
if (new_rlimit == NULL)
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
|
|
old_rlimit->rlim_max = RLIM_INFINITY;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|