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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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