| /* Copyright (C) 1999, 2000, 2003, 2006 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, 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 <shlib-compat.h> |
| #include <bp-checks.h> |
| |
| #include <kernel-features.h> |
| |
| extern int __new_setrlimit (enum __rlimit_resource resource, |
| const struct rlimit *__unboundedrlimits); |
| |
| /* 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, CHECK_1 (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, __ptrvalue (&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, CHECK_1 (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, __ptrvalue (&rlimits_small)); |
| #endif |
| } |
| |
| weak_alias (__new_setrlimit, __setrlimit); |
| versioned_symbol (libc, __new_setrlimit, setrlimit, GLIBC_2_2); |