static long
eiawrite(Chan *c, void *buf, long n, vlong offset)
{
ssize_t cnt;
char cmd[Maxctl];
int port = NETID(c->qid.path);
USED(offset);
if(c->qid.type & QTDIR)
error(Eperm);
switch(NETTYPE(c->qid.path)) {
case Ndataqid:
osenter();
cnt = write(eia[port].fd, buf, n);
osleave();
if(cnt == -1)
oserror();
return cnt;
case Nctlqid:
if(n >= (long)sizeof(cmd))
n = sizeof(cmd)-1;
memmove(cmd, buf, n);
cmd[n] = 0;
wrctl(port, cmd);
return n;
}
return 0;
}
static long
eiawrite(Chan *c, void *buf, long n, vlong offset)
{
DWORD cnt;
char cmd[Maxctl];
int port = NETID(c->qid.path);
BOOL good;
uchar *data;
if(c->qid.type & QTDIR)
error(Eperm);
switch(NETTYPE(c->qid.path)) {
case Ndataqid:
cnt = 0;
data = (uchar*)buf;
// if WriteFile times out (i.e. return true; cnt<n) then
// allow osleave() to check for an interrupt otherwise try
// to send the unsent data.
while(n>0) {
osenter();
good = WriteFile(eia[port].comfh, data, n, &cnt, NULL);
osleave();
if(!good)
oserror();
data += cnt;
n -= cnt;
}
return (data-(uchar*)buf);
case Nctlqid:
if(n >= sizeof(cmd))
n = sizeof(cmd)-1;
memmove(cmd, buf, n);
cmd[n] = 0;
wrctl(port, cmd);
return n;
}
return 0;
}