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79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/* Copyright (C) 1999, 2000, 2003, 2006 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <sys/param.h>
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#include <sys/resource.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include <shlib-compat.h>
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#include <bp-checks.h>
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#include <kernel-features.h>
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extern int __new_setrlimit (enum __rlimit_resource resource,
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const struct rlimit *__unboundedrlimits);
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/* Linux 2.3.25 introduced a new system call since the types used for
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the limits are now unsigned. */
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#if defined __NR_ugetrlimit && !defined __ASSUME_NEW_GETRLIMIT_SYSCALL
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extern int __have_no_new_getrlimit; /* from getrlimit.c */
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#endif
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int
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__new_setrlimit (enum __rlimit_resource resource, const struct rlimit *rlimits)
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{
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#ifdef __ASSUME_NEW_GETRLIMIT_SYSCALL
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return INLINE_SYSCALL (setrlimit, 2, resource, CHECK_1 (rlimits));
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#else
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struct rlimit rlimits_small;
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# ifdef __NR_ugetrlimit
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if (__have_no_new_getrlimit == 0)
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{
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/* Check if the new ugetrlimit syscall exists. We must do this
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first because older kernels don't reject negative rlimit
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values in setrlimit. */
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int result = INLINE_SYSCALL (ugetrlimit, 2, resource, __ptrvalue (&rlimits_small));
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if (result != -1 || errno != ENOSYS)
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/* The syscall exists. */
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__have_no_new_getrlimit = -1;
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else
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/* The syscall does not exist. */
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__have_no_new_getrlimit = 1;
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}
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if (__have_no_new_getrlimit < 0)
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return INLINE_SYSCALL (setrlimit, 2, resource, CHECK_1 (rlimits));
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# endif
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/* We might have to correct the limits values. Since the old values
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were signed the new values might be too large. */
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rlimits_small.rlim_cur = MIN ((unsigned long int) rlimits->rlim_cur,
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RLIM_INFINITY >> 1);
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rlimits_small.rlim_max = MIN ((unsigned long int) rlimits->rlim_max,
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RLIM_INFINITY >> 1);
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/* Use the adjusted values. */
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return INLINE_SYSCALL (setrlimit, 2, resource, __ptrvalue (&rlimits_small));
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#endif
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}
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weak_alias (__new_setrlimit, __setrlimit);
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versioned_symbol (libc, __new_setrlimit, setrlimit, GLIBC_2_2);
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