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
9struct ctx {
10 unsigned long lim[2];
11 int res;
12 int err;
13};
14
15#ifdef SYS_setrlimit
16static void do_setrlimit(void *p)
17{
18 struct ctx *c = p;
19 if (c->err>0) return;
20 c->err = -__syscall(SYS_setrlimit, c->res, c->lim);
21}
22#endif
23
24int setrlimit(int resource, const struct rlimit *rlim)
25{
26 struct rlimit tmp;
27 if (SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
28 tmp = *rlim;
29 FIX(tmp.rlim_cur);
30 FIX(tmp.rlim_max);
31 rlim = &tmp;
32 }
33 int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
34#ifdef SYS_setrlimit
35 if (ret != -ENOSYS) return __syscall_ret(ret);
36
37 struct ctx c = {
38 .lim[0] = MIN(rlim->rlim_cur, MIN(-1UL, SYSCALL_RLIM_INFINITY)),
39 .lim[1] = MIN(rlim->rlim_max, MIN(-1UL, SYSCALL_RLIM_INFINITY)),
40 .res = resource, .err = -1
41 };
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#else
49 return __syscall_ret(ret);
50#endif
51}