1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /******************************************************************************
20 * writen.c
21 ******************************************************************************/
22
23 #include <unistd.h>
24
25 /* Write "n" bytes to a descriptor
26 Use instead of write() when fd is a stream socket. */
27
writen(fd,ptr,nbytes)28 int writen(fd, ptr, nbytes)
29 register int fd;
30 register char *ptr;
31 register int nbytes;
32 {
33 int nleft, nwritten;
34
35 nleft = nbytes;
36 while (nleft > 0) {
37 nwritten = write(fd, ptr, nleft);
38 if (nwritten <= 0)
39 return (nwritten); /* error */
40 nleft -= nwritten;
41 ptr += nwritten;
42 }
43 return (nbytes - nleft);
44 }
45