mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-02-08 18:19:08 +08:00
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
#include "select_test.h"
|
|
|
|
int
|
|
main ()
|
|
{
|
|
int sfd, flags;
|
|
fd_set writefds;
|
|
size_t nwritten = 0;
|
|
ssize_t nw;
|
|
char buf[BUF_SIZE];
|
|
|
|
if ((sfd = unixConnect (SV_SOCK_PATH, SOCK_STREAM)) < 0)
|
|
errExit ("unixConnect");
|
|
flags = fcntl (sfd, F_GETFL);
|
|
if (fcntl (sfd, F_SETFL, flags | O_NONBLOCK) < 0)
|
|
errExit ("fcntl");
|
|
|
|
printf ("waiting for socket to be ready for write...\n");
|
|
FD_ZERO (&writefds);
|
|
FD_SET (sfd, &writefds);
|
|
if (select (sfd + 1, NULL, &writefds, NULL, NULL) < 0)
|
|
errExit ("select");
|
|
if (FD_ISSET (sfd, &writefds))
|
|
printf ("ready for write, writing until buffer full\n");
|
|
else
|
|
errExit ("something's wrong");
|
|
while (1)
|
|
{
|
|
nw = write (sfd, buf, BUF_SIZE);
|
|
if (nw < 0)
|
|
{
|
|
if (errno == EAGAIN)
|
|
{
|
|
printf ("buffer full\n");
|
|
break;
|
|
}
|
|
else
|
|
errExit ("write");
|
|
}
|
|
nwritten += nw;
|
|
}
|
|
printf ("wrote %zu bytes\n", nwritten);
|
|
printf ("waiting for write ready again...\n");
|
|
FD_ZERO (&writefds);
|
|
FD_SET (sfd, &writefds);
|
|
if (select (sfd + 1, NULL, &writefds, NULL, NULL) < 0)
|
|
errExit ("select");
|
|
if (FD_ISSET (sfd, &writefds))
|
|
printf ("ready for write, writing once more\n");
|
|
if ((nw = write (sfd, buf, BUF_SIZE)) < 0)
|
|
errExit ("write");
|
|
nwritten += nw;
|
|
printf ("wrote %zd more bytes for a total of %zu\n", nw, nwritten);
|
|
}
|