1 /* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 #include <sys/param.h>
21 #include <sys/resource.h>
24 #include <sys/syscall.h>
25 #include <shlib-compat.h>
26 #include <bp-checks.h>
28 #include "kernel-features.h"
30 extern int __syscall_setrlimit (unsigned int resource
,
31 const struct rlimit
*__unbounded rlimits
);
32 extern int __syscall_ugetrlimit (unsigned int resource
,
33 const struct rlimit
*__unbounded rlimits
);
34 extern int __new_setrlimit (enum __rlimit_resource resource
,
35 const struct rlimit
*__unboundedrlimits
);
37 /* Linux 2.3.25 introduced a new system call since the types used for
38 the limits are now unsigned. */
39 #if defined __NR_ugetrlimit && !defined __ASSUME_NEW_GETRLIMIT_SYSCALL
40 extern int __have_no_new_getrlimit
; /* from getrlimit.c */
44 __new_setrlimit (enum __rlimit_resource resource
, const struct rlimit
*rlimits
)
46 #ifdef __ASSUME_NEW_GETRLIMIT_SYSCALL
47 return INLINE_SYSCALL (setrlimit
, 2, resource
, CHECK_1 (rlimits
));
49 struct rlimit rlimits_small
;
51 # ifdef __NR_ugetrlimit
52 if (__have_no_new_getrlimit
== 0)
54 /* Check if the new ugetrlimit syscall exists. We must do this
55 first because older kernels don't reject negative rlimit
56 values in setrlimit. */
57 int result
= INLINE_SYSCALL (ugetrlimit
, 2, resource
, __ptrvalue (&rlimits_small
));
58 if (result
!= -1 || errno
!= ENOSYS
)
59 /* The syscall exists. */
60 __have_no_new_getrlimit
= -1;
62 /* The syscall does not exist. */
63 __have_no_new_getrlimit
= 1;
65 if (__have_no_new_getrlimit
< 0)
66 return INLINE_SYSCALL (setrlimit
, 2, resource
, CHECK_1 (rlimits
));
69 /* We might have to correct the limits values. Since the old values
70 were signed the new values might be too large. */
71 rlimits_small
.rlim_cur
= MIN ((unsigned long int) rlimits
->rlim_cur
,
73 rlimits_small
.rlim_max
= MIN ((unsigned long int) rlimits
->rlim_max
,
76 /* Use the adjusted values. */
77 return INLINE_SYSCALL (setrlimit
, 2, resource
, __ptrvalue (&rlimits_small
));
81 weak_alias (__new_setrlimit
, __setrlimit
);
82 versioned_symbol (libc
, __new_setrlimit
, setrlimit
, GLIBC_2_2
);