1 #include <u.h>
2 #define NOPLAN9DEFINES
3 #include <libc.h>
4 
5 long
6 p9write(int f, void *av, long n)
7 {
8 	char *a;
9 	long m, t;
10 
11 	a = av;
12 	t = 0;
13 	while(t < n){
14 		m = write(f, a+t, n-t);
15 		if(m <= 0){
16 			if(t == 0)
17 				return m;
18 			break;
19 		}
20 		t += m;
21 	}
22 	return t;
23 }