src/tests/kits/net/sock/writen.c

   1 /* -*- c-basic-offset: 8; -*- */
   2 /* include writen */
   3 #include        "sock.h"
   4
   5 ssize_t                                         /* Write "n" bytes to a descriptor. */
   6 writen(int fd, const void *vptr, size_t n)
   7 {
   8         size_t          nleft;
   9         ssize_t         nwritten;
  10         const char      *ptr;
  11
  12         ptr = vptr;
  13         nleft = n;
  14         while (nleft > 0) {
  15                 if ( (nwritten = write(fd, ptr, nleft)) <= 0) {
  16                         if (errno == EINTR)
  17                                 nwritten = 0;           /* and call write() again */
  18                         else
  19                                 return(-1);                     /* error */
  20                 }
  21
  22                 nleft -= nwritten;
  23                 ptr   += nwritten;
  24         }
  25         return(n);
  26 }
  27 /* end writen */
  28