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
9 struct ctx {
10 unsigned long lim[2];
11 int res;
12 int err;
13 };
14
do_setrlimit(void * p)15 static void do_setrlimit(void *p)
16 {
17 struct ctx *c = p;
18 if (c->err>0) return;
19 c->err = -__syscall(SYS_setrlimit, c->res, c->lim);
20 }
21
setrlimit(int resource,const struct rlimit * rlim)22 int setrlimit(int resource, const struct rlimit *rlim)
23 {
24 struct rlimit tmp;
25 if (SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
26 tmp = *rlim;
27 FIX(tmp.rlim_cur);
28 FIX(tmp.rlim_max);
29 rlim = &tmp;
30 }
31 int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
32 if (ret != -ENOSYS) return __syscall_ret(ret);
33
34 struct ctx c = {
35 .lim[0] = MIN(rlim->rlim_cur, MIN(-1UL, SYSCALL_RLIM_INFINITY)),
36 .lim[1] = MIN(rlim->rlim_max, MIN(-1UL, SYSCALL_RLIM_INFINITY)),
37 .res = resource, .err = -1
38 };
39 __synccall(do_setrlimit, &c);
40 if (c.err) {
41 if (c.err>0) errno = c.err;
42 return -1;
43 }
44 return 0;
45 }
46
47 weak_alias(setrlimit, setrlimit64);
48