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/*
* setrlimit() for uClibc
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#include <sys/resource.h>
#include <bits/wordsize.h>
#include <stddef.h> // needed for NULL to be defined
/* Only wrap setrlimit if the new usetrlimit is not present and setrlimit sucks */
#if defined(__NR_usetrlimit)
/* just call usetrlimit() */
# define __NR___syscall_usetrlimit __NR_usetrlimit
static __always_inline
_syscall2(int, __syscall_usetrlimit, enum __rlimit_resource, resource,
const struct rlimit *, rlim)
int setrlimit(__rlimit_resource_t resource, const struct rlimit *rlimits)
{
return __syscall_usetrlimit(resource, rlimits);
}
libc_hidden_def(setrlimit)
#elif defined(__NR_prlimit64)
/* Use prlimit64 if present, the prlimit64 syscall is free from a back
compatibility stuff for setrlimit */
# if __WORDSIZE == 32 && !defined(__USE_FILE_OFFSET64)
/* If struct rlimit has 64-bit fields (if __WORDSIZE == 64 or __USE_FILE_OFFSET64
is defined), then use setrlimit as an alias to setrlimit64, see setrlimit64.c */
int setrlimit(__rlimit_resource_t resource, const struct rlimit *rlimits)
{
struct rlimit64 rlimits64;
if (rlimits->rlim_cur == RLIM_INFINITY)
rlimits64.rlim_cur = RLIM64_INFINITY;
else
rlimits64.rlim_cur = rlimits->rlim_cur;
if (rlimits->rlim_max == RLIM_INFINITY)
rlimits64.rlim_max = RLIM64_INFINITY;
else
rlimits64.rlim_max = rlimits->rlim_max;
return INLINE_SYSCALL (prlimit64, 4, 0, resource, &rlimits64, NULL);
}
libc_hidden_def(setrlimit)
# endif
#else
# if !defined(__UCLIBC_HANDLE_OLDER_RLIMIT__)
/* We don't need to wrap setrlimit() */
_syscall2(int, setrlimit, __rlimit_resource_t, resource,
const struct rlimit *, rlim)
# else
# define __need_NULL
# include <stddef.h>
# include <errno.h>
# include <sys/param.h>
/* we have to handle old style setrlimit() */
# define __NR___syscall_setrlimit __NR_setrlimit
static __always_inline
_syscall2(int, __syscall_setrlimit, int, resource, const struct rlimit *, rlim)
int setrlimit(__rlimit_resource_t resource, const struct rlimit *rlimits)
{
struct rlimit rlimits_small;
if (rlimits == NULL) {
__set_errno(EINVAL);
return -1;
}
/* 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);
return __syscall_setrlimit(resource, &rlimits_small);
}
# endif
libc_hidden_def(setrlimit)
#endif
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