1 b2cfc4e2 2003-09-30 devnull #include <lib9.h>
 2 b2cfc4e2 2003-09-30 devnull 
 3 b2cfc4e2 2003-09-30 devnull long
 4 b2cfc4e2 2003-09-30 devnull readn(int f, void *av, long n)
 5 b2cfc4e2 2003-09-30 devnull {
 6 b2cfc4e2 2003-09-30 devnull 	char *a;
 7 b2cfc4e2 2003-09-30 devnull 	long m, t;
 8 b2cfc4e2 2003-09-30 devnull 
 9 b2cfc4e2 2003-09-30 devnull 	a = av;
10 b2cfc4e2 2003-09-30 devnull 	t = 0;
11 b2cfc4e2 2003-09-30 devnull 	while(t < n){
12 b2cfc4e2 2003-09-30 devnull 		m = read(f, a+t, n-t);
13 b2cfc4e2 2003-09-30 devnull 		if(m <= 0){
14 b2cfc4e2 2003-09-30 devnull 			if(t == 0)
15 b2cfc4e2 2003-09-30 devnull 				return m;
16 b2cfc4e2 2003-09-30 devnull 			break;
17 b2cfc4e2 2003-09-30 devnull 		}
18 b2cfc4e2 2003-09-30 devnull 		t += m;
19 b2cfc4e2 2003-09-30 devnull 	}
20 b2cfc4e2 2003-09-30 devnull 	return t;
21 b2cfc4e2 2003-09-30 devnull }