nsz Git - musl/blob - src/linux/prlimit.c

   1 #define _GNU_SOURCE
   2 #include <sys/resource.h>
   3 #include "syscall.h"
   4
   5 #define FIX(x) do{ if ((x)>=SYSCALL_RLIM_INFINITY) (x)=RLIM_INFINITY; }while(0)
   6
   7 int prlimit(pid_t pid, int resource, const struct rlimit *new_limit, struct rlimit *old_limit)
   8 {
   9         struct rlimit tmp;
  10         int r;
  11         if (new_limit && SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
  12                 tmp = *new_limit;
  13                 FIX(tmp.rlim_cur);
  14                 FIX(tmp.rlim_max);
  15                 new_limit = &tmp;
  16         }
  17         r = syscall(SYS_prlimit64, pid, resource, new_limit, old_limit);
  18         if (!r && old_limit && SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
  19                 FIX(old_limit->rlim_cur);
  20                 FIX(old_limit->rlim_max);
  21         }
  22         return r;
  23 }