Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>

long
readn(int f, void *av, long n)
{
        char *a;
        long m, t;

        a = av;
        t = 0;
        while(t < n){
                m = read(f, a+t, n-t);
                if(m <= 0){
                        if(t == 0)
                                return m;
                        break;
                }
                t += m;
        }
        return t;
}