marignotti/mwrite.c

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2012-05-05 00:11:02 +00:00
#include "marignotti.h"
#include <gno/kerntool.h>
#include <sys/signal.h>
#include <errno.h>
#pragma noroot
#pragma optimize 79
// called through GSOS.
int mwrite(int ipid, void *p1, void *p2, void *p3, void *p4, void *p5)
{
Entry *e;
Word terr;
Word t;
int xerrno;
char *buffer = (char *)p1;
LongWord nbytes = *(LongWord *)p2;
*(LongWord *)p2 = 0;
e = find_entry(ipid);
if (!e)
{
return EBADF;
}
// todo -- queue up if pending >= _SNDLOWAT?
// todo -- push?
IncBusy();
terr = TCPIPWriteTCP(ipid, buffer, nbytes, 0, 0);
t = _toolErr;
DecBusy();
if (t) terr = t;
if (t || terr == tcperrBadConnection)
return ENOTCONN;
if (terr == tcperrNoResources)
return ENOMEM;
if (terr == tcperrConClosing)
{
int xerrno;
if (!e->_NOSIGPIPE)
Kkill(Kgetpid(), SIGPIPE, &xerrno);
return EPIPE;
}
*(LongWord *)p2 = nbytes;
return 0;
}