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use prlimit syscall for getrlimit/setrlimit

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this allows the full range of 64-bit limit arguments even on 32-bit
systems. fallback to the old syscalls on old kernels that don't
support prlimit.
This commit is contained in:
Rich Felker
2012-01-20 22:30:52 -05:00
parent 26f38328d6
commit 5235a2a5a4
2 changed files with 14 additions and 4 deletions
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8
src/misc/setrlimit.c
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@ -3,9 +3,15 @@
#include "syscall.h"
#include "libc.h"
#define MIN(a, b) ((a)<(b) ? (a) : (b))
int __setrlimit(int resource, const struct rlimit *rlim)
{
long k_rlim[2] = { rlim->rlim_cur, rlim->rlim_max };
unsigned long k_rlim[2];
int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
if (ret != -ENOSYS) return ret;
k_rlim[0] = MIN(rlim->rlim_cur, -1UL);
k_rlim[1] = MIN(rlim->rlim_max, -1UL);
return __syscall(SYS_setrlimit, resource, k_rlim);
}