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

   1 #define _GNU_SOURCE
   2 #include <sys/resource.h>
   3 #include "syscall.h"
   4 #include "libc.h"
   5
   6 #define FIX(x) do{ if ((x)>=SYSCALL_RLIM_INFINITY) (x)=RLIM_INFINITY; }while(0)
   7
   8 int prlimit(pid_t pid, int resource, const struct rlimit *new_limit, struct rlimit *old_limit)
   9 {
  10         struct rlimit tmp;
  11         int r;
  12         if (new_limit && SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
  13                 tmp = *new_limit;
  14                 FIX(tmp.rlim_cur);
  15                 FIX(tmp.rlim_max);
  16                 new_limit = &tmp;
  17         }
  18         r = syscall(SYS_prlimit64, pid, resource, new_limit, old_limit);
  19         if (!r && old_limit && SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
  20                 FIX(old_limit->rlim_cur);
  21                 FIX(old_limit->rlim_max);
  22         }
  23         return r;
  24 }
  25
  26 #undef prlimit64
  27 LFS64(prlimit);