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#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);
}
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