forked from bortzmeyer/echoping
-
Notifications
You must be signed in to change notification settings - Fork 1
/
writen.c
32 lines (28 loc) · 836 Bytes
/
writen.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
/*
* Write "n" bytes to a descriptor. Use in place of write() when fd is a
* stream socket.
*/
/* Stolen from Stevens' book */
#include "echoping.h"
int
writen(fd, ptr, nbytes)
register int fd;
register char *ptr;
register int nbytes;
{
int nleft, nwritten;
nleft = nbytes;
while (nleft > 0) {
nwritten = write(fd, ptr, nleft);
if (nwritten <= 0)
return (nwritten); /* error */
/* Some systems, such as Digital's OSF1 (Digital Unix) doesn't set the
* returned value to -1, even when interrupted by an alarm, whatever says
* the documentation. errno is not set. */
if ((nwritten < nleft) && timeout_flag)
return nwritten;
nleft -= nwritten;
ptr += nwritten;
}
return (nbytes - nleft);
}