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/* Copyright (C) 1999, 2000 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include "kernel-features.h"
#include <shlib-compat.h>
extern int __syscall_setrlimit (unsigned int resource,
const struct rlimit *rlimits);
extern int __syscall_ugetrlimit (unsigned int resource,
const struct rlimit *rlimits);
/* Linux 2.3.25 introduced a new system call since the types used for
the limits are now unsigned. */
#if defined __NR_ugetrlimit && !defined __ASSUME_NEW_GETRLIMIT_SYSCALL
extern int __have_no_new_getrlimit; /* from getrlimit.c */
#endif
int
__new_setrlimit (enum __rlimit_resource resource, const struct rlimit *rlimits)
{
#ifdef __ASSUME_NEW_GETRLIMIT_SYSCALL
return INLINE_SYSCALL (setrlimit, 2, resource, rlimits);
#else
struct rlimit rlimits_small;
# ifdef __NR_ugetrlimit
if (__have_no_new_getrlimit == 0)
{
/* Check if the new ugetrlimit syscall exists. We must do this
first because older kernels don't reject negative rlimit
values in setrlimit. */
int result = INLINE_SYSCALL (ugetrlimit, 2, resource, &rlimits_small);
if (result != -1 || errno != ENOSYS)
/* The syscall exists. */
__have_no_new_getrlimit = -1;
else
/* The syscall does not exist. */
__have_no_new_getrlimit = 1;
}
if (__have_no_new_getrlimit < 0)
return INLINE_SYSCALL (setrlimit, 2, resource, rlimits);
# endif
/* We might have to correct the limits values. Since the old values
were signed the new values might be too large. */
rlimits_small.rlim_cur = MIN ((unsigned long int) rlimits->rlim_cur,
RLIM_INFINITY >> 1);
rlimits_small.rlim_max = MIN ((unsigned long int) rlimits->rlim_max,
RLIM_INFINITY >> 1);
/* Use the adjusted values. */
return INLINE_SYSCALL (setrlimit, 2, resource, &rlimits_small);
#endif
}
weak_alias (__new_setrlimit, __setrlimit);
versioned_symbol (libc, __new_setrlimit, setrlimit, GLIBC_2_2);
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