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 #ifdef __LITEOS_A__
__setrlimit(int resource, const struct rlimit *rlim)10 static int __setrlimit(int resource, const struct rlimit *rlim)
11 {
12 unsigned long long k_rlim[2];
13 struct rlimit tmp;
14 if (SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
15 tmp = *rlim;
16 FIX(tmp.rlim_cur);
17 FIX(tmp.rlim_max);
18 rlim = &tmp;
19 }
20
21 k_rlim[0] = rlim->rlim_cur;
22 k_rlim[1] = rlim->rlim_max;
23 return __syscall(SYS_setrlimit, resource, k_rlim);
24 }
25 #endif
26
27 struct ctx {
28 #ifdef __LITEOS_A__
29 const struct rlimit *rlim;
30 #else
31 unsigned long lim[2];
32 #endif
33 int res;
34 int err;
35 };
36
37 #ifdef SYS_setrlimit
do_setrlimit(void *p)38 static void do_setrlimit(void *p)
39 {
40 struct ctx *c = p;
41 if (c->err>0) return;
42 #ifdef __LITEOS_A__
43 c->err = -__setrlimit(c->res, c->rlim);
44 #else
45 c->err = -__syscall(SYS_setrlimit, c->res, c->lim);
46 #endif
47 }
48 #endif
49
setrlimit(int resource, const struct rlimit *rlim)50 int setrlimit(int resource, const struct rlimit *rlim)
51 {
52 #ifdef __LITEOS_A__
53 struct ctx c = { .res = resource, .rlim = rlim, .err = -1 };
54 #else
55 struct rlimit tmp;
56 if (SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
57 tmp = *rlim;
58 FIX(tmp.rlim_cur);
59 FIX(tmp.rlim_max);
60 rlim = &tmp;
61 }
62 int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
63 #ifdef SYS_setrlimit
64 if (ret != -ENOSYS) return __syscall_ret(ret);
65
66 struct ctx c = {
67 .lim[0] = MIN(rlim->rlim_cur, MIN(-1UL, SYSCALL_RLIM_INFINITY)),
68 .lim[1] = MIN(rlim->rlim_max, MIN(-1UL, SYSCALL_RLIM_INFINITY)),
69 .res = resource, .err = -1
70 };
71 __synccall(do_setrlimit, &c);
72 if (c.err) {
73 if (c.err>0) errno = c.err;
74 return -1;
75 }
76 return 0;
77 #else
78 return __syscall_ret(ret);
79 #endif
80 #endif
81 }
82
83 weak_alias(setrlimit, setrlimit64);
84