1/* See LICENSE file for copyright and license details. */
 2#include <unistd.h>
 3
 4#include "../util.h"
 5
 6ssize_t
 7writeall(int fd, const void *buf, size_t len)
 8{
 9  const char *p = buf;
10  ssize_t     n;
11
12  while (len) {
13    n = write(fd, p, len);
14    if (n <= 0)
15      return n;
16    p += n;
17    len -= n;
18  }
19
20  return p - (const char *)buf;
21}