1#include <sys/resource.h>
2#include <errno.h>
3#include "syscall.h"
4#include "libc.h"
5
6#define MIN(a, b) ((a)<(b) ? (a) : (b))
7#define FIX(x) do{ if ((x)>=SYSCALL_RLIM_INFINITY) (x)=RLIM_INFINITY; }while(0)
8
9int __setrlimit(int resource, const struct rlimit *rlim)
10{
11	unsigned long k_rlim[2];
12	struct rlimit tmp;
13	if (SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
14		tmp = *rlim;
15		FIX(tmp.rlim_cur);
16		FIX(tmp.rlim_max);
17		rlim = &tmp;
18	}
19	int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
20	if (ret != -ENOSYS) return ret;
21	k_rlim[0] = MIN(rlim->rlim_cur, MIN(-1UL, SYSCALL_RLIM_INFINITY));
22	k_rlim[1] = MIN(rlim->rlim_max, MIN(-1UL, SYSCALL_RLIM_INFINITY));
23	return __syscall(SYS_setrlimit, resource, k_rlim);
24}
25
26struct ctx {
27	const struct rlimit *rlim;
28	int res;
29	int err;
30};
31
32static void do_setrlimit(void *p)
33{
34	struct ctx *c = p;
35	if (c->err>0) return;
36	c->err = -__setrlimit(c->res, c->rlim);
37}
38
39int setrlimit(int resource, const struct rlimit *rlim)
40{
41	struct ctx c = { .res = resource, .rlim = rlim, .err = -1 };
42	__synccall(do_setrlimit, &c);
43	if (c.err) {
44		if (c.err>0) errno = c.err;
45		return -1;
46	}
47	return 0;
48}
49
50LFS64(setrlimit);
51