src/misc/getrlimit.c

   1 #include <sys/resource.h>
   2 #include <errno.h>
   3 #include "syscall.h"
   4
   5 #define FIX(x) do{ if ((x)>=SYSCALL_RLIM_INFINITY) (x)=RLIM_INFINITY; }while(0)
   6
   7 int getrlimit(int resource, struct rlimit *rlim)
   8 {
   9         int ret = syscall(SYS_prlimit64, 0, resource, 0, rlim);
  10         if (!ret) {
  11                 FIX(rlim->rlim_cur);
  12                 FIX(rlim->rlim_max);
  13         }
  14 #ifdef SYS_getrlimit
  15         unsigned long k_rlim[2];
  16         if (!ret || errno != ENOSYS)
  17                 return ret;
  18         if (syscall(SYS_getrlimit, resource, k_rlim) < 0)
  19                 return -1;
  20         rlim->rlim_cur = k_rlim[0] == -1UL ? RLIM_INFINITY : k_rlim[0];
  21         rlim->rlim_max = k_rlim[1] == -1UL ? RLIM_INFINITY : k_rlim[1];
  22         FIX(rlim->rlim_cur);
  23         FIX(rlim->rlim_max);
  24         return 0;
  25 #else
  26         return ret;
  27 #endif
  28 }