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/*
* getrlimit() 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 getrlimit if the new ugetrlimit is not present and getrlimit sucks */
#if defined(__NR_ugetrlimit)
/* just call ugetrlimit() */
# define __NR___syscall_ugetrlimit __NR_ugetrlimit
static __always_inline
_syscall2(int, __syscall_ugetrlimit, enum __rlimit_resource, resource,
struct rlimit *, rlim)
int getrlimit(__rlimit_resource_t resource, struct rlimit *rlimits)
{
return __syscall_ugetrlimit(resource, rlimits);
}
libc_hidden_def(getrlimit)
#elif defined(__NR_prlimit64)
/* Use prlimit64 if present, the prlimit64 syscall is free from a back
compatibility stuff for an old getrlimit */
# 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 getrlimit as an alias to getrlimit64, see getrlimit64.c */
int getrlimit(__rlimit_resource_t resource, struct rlimit *rlimits)
{
struct rlimit64 rlimits64;
int res = INLINE_SYSCALL (prlimit64, 4, 0, resource, NULL, &rlimits64);
if (res == 0) {
/* If the syscall succeeds but the values do not fit into a
rlimit structure set EOVERFLOW errno and retrun -1. */
rlimits->rlim_cur = rlimits64.rlim_cur;
if (rlimits64.rlim_cur != rlimits->rlim_cur) {
if (rlimits64.rlim_cur != RLIM64_INFINITY) {
__set_errno(EOVERFLOW);
return -1;
}
rlimits->rlim_cur = RLIM_INFINITY;
}
rlimits->rlim_max = rlimits64.rlim_max;
if (rlimits64.rlim_max != rlimits->rlim_max) {
if (rlimits64.rlim_max != RLIM64_INFINITY) {
__set_errno(EOVERFLOW);
return -1;
}
rlimits->rlim_max = RLIM_INFINITY;
}
}
return res;
}
libc_hidden_def(getrlimit)
# endif
#else
# if !defined(__UCLIBC_HANDLE_OLDER_RLIMIT__)
/* We don't need to wrap getrlimit() */
_syscall2(int, getrlimit, __rlimit_resource_t, resource,
struct rlimit *, rlim)
# else
/* we have to handle old style getrlimit() */
# define __NR___syscall_getrlimit __NR_getrlimit
static __always_inline
_syscall2(int, __syscall_getrlimit, int, resource, struct rlimit *, rlim)
int getrlimit(__rlimit_resource_t resource, struct rlimit *rlimits)
{
int result;
result = __syscall_getrlimit(resource, rlimits);
if (result == -1)
return result;
/* We might have to correct the limits values. Since the old values
* were signed the infinity value is too small. */
if (rlimits->rlim_cur == RLIM_INFINITY >> 1)
rlimits->rlim_cur = RLIM_INFINITY;
if (rlimits->rlim_max == RLIM_INFINITY >> 1)
rlimits->rlim_max = RLIM_INFINITY;
return result;
}
# endif
libc_hidden_def(getrlimit)
#endif
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