github.com/afumu/libc@v0.0.6/musl/src/misc/getrlimit.c (about)

     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  	unsigned long k_rlim[2];
    10  	int ret = syscall(SYS_prlimit64, 0, resource, 0, rlim);
    11  	if (!ret) {
    12  		FIX(rlim->rlim_cur);
    13  		FIX(rlim->rlim_max);
    14  	}
    15  	if (!ret || errno != ENOSYS)
    16  		return ret;
    17  	if (syscall(SYS_getrlimit, resource, k_rlim) < 0)
    18  		return -1;
    19  	rlim->rlim_cur = k_rlim[0] == -1UL ? RLIM_INFINITY : k_rlim[0];
    20  	rlim->rlim_max = k_rlim[1] == -1UL ? RLIM_INFINITY : k_rlim[1];
    21  	FIX(rlim->rlim_cur);
    22  	FIX(rlim->rlim_max);
    23  	return 0;
    24  }
    25  
    26  weak_alias(getrlimit, getrlimit64);