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#include <sys/resource.h>
#include <errno.h>
#include "syscall.h"
#include "libc.h"
#define MIN(a, b) ((a)<(b) ? (a) : (b))
#define FIX(x) do{ if ((x)>=SYSCALL_RLIM_INFINITY) (x)=RLIM_INFINITY; }while(0)
int __setrlimit(int resource, const struct rlimit *rlim)
{
unsigned long k_rlim[2];
struct rlimit tmp;
if (SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
tmp = *rlim;
FIX(tmp.rlim_cur);
FIX(tmp.rlim_max);
rlim = &tmp;
}
int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
if (ret != -ENOSYS) return ret;
k_rlim[0] = MIN(rlim->rlim_cur, MIN(-1UL, SYSCALL_RLIM_INFINITY));
k_rlim[1] = MIN(rlim->rlim_max, MIN(-1UL, SYSCALL_RLIM_INFINITY));
return __syscall(SYS_setrlimit, resource, k_rlim);
}
struct ctx {
const struct rlimit *rlim;
int res;
int err;
};
static void do_setrlimit(void *p)
{
struct ctx *c = p;
if (c->err) return;
c->err = -__setrlimit(c->res, c->rlim);
}
int setrlimit(int resource, const struct rlimit *rlim)
{
struct ctx c = { .res = resource, .rlim = rlim };
__synccall(do_setrlimit, &c);
if (c.err) {
errno = c.err;
return -1;
}
return 0;
}
LFS64(setrlimit);
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