Alexey Kizilov wrote:
Can I use something similar to socketpair ?
May be create wrapper for this function, based
on some qnx-specific functions ?
Here is a wrapper from Erik Schoenfelder …
Armin
Re: scotty/tkined on SCO Unix
Erik Schoenfelder (schoenfr@sol)
Fri, 8 Apr 94 19:54:26 +0200
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Hi!
“S. Kent Hamilton” <> kenth@scssa.ops.scscom.com> >:
SKH> This is a problem on SCO (and many other Intel Unix’s) they
don’t have
SKH> socketpair. They don’t have unix sockets. Most of the stuff is
done
SKH> via named pipes, or SysV ipc.
Smile Time to take a look at Linux. A intel box with socketpairs
Maybe a workaroud would be a socketpair() replacement which creates
two inet domain sockets, bound to diffrent ports, connects them via
accept/connect and uses this connection after a fork. But i am not
sure, if this would be usable.
SKH> This is what I had in mind trying. I’ve never tried it before
SKH> but I can’t see why it wouldn’t work. If you have suggestions
SKH> for implimenting it please send 'em along, I’m a sysadmin not
SKH> a coder… 
Well, maybe the sysadmins are the better coders ? The users are ever
playing and never hacking…
Anyway, please try the ``inet_socketpair()’’ function below as a
replacement with AF_INET domain parameter. Maybe its the shot that
hits the spot.
It seems to work with SunOS 4.1.x and Linux 1.0.
Thanks, Erik
/*
- socketpair-example3.c: April 1994
- (schoenfr)
-
- simple socketpair replacement for AF_INET domain.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
/* #define TEST_STANDALONE /* define for a test version
/
/
- use
-
inet_socketpair (AF_INET, SOCK_STREAM, 0, xv)
- as
-
socketpair (AF_UNIX, SOCK_STREAM, 0, xv)
- replacement.
*/
static int
inet_socketpair (d, type, protocol, sv)
int d, type, protocol;
int sv[2];
{
struct sockaddr_in addr1, addr2, addr3;
int addr3_len = sizeof (addr3);
int fd, rc;
static int port_no = 2345; /* XXX: ok ? */
if (d != AF_INET || type != SOCK_STREAM || protocol)
{
fprintf (stderr, “** bad param in inet_socketpair.\n”);
return -1;
}
if ((sv [0] = socket (AF_INET, SOCK_STREAM, 0)) < 0
|| (sv [1] = socket (AF_INET, SOCK_STREAM, 0)) < 0)
{
perror ("** cannot create sockets; reason");
return -1;
}
addr1.sin_port = htons (port_no);
addr1.sin_family = AF_INET;
addr1.sin_addr.s_addr = 0;
while ((rc = bind (sv[0], (struct sockaddr *) &addr1, sizeof
(addr1))) < 0
&& errno == EADDRINUSE)
addr1.sin_port = htons (++port_no);
if (rc < 0)
{
perror ("** cannot bind; reason");
return -1;
}
if (listen (sv[0], 1) < 0)
{
perror ("** cannot listen; reason");
return -1;
}
addr2.sin_port = htons (port_no);
addr2.sin_family = AF_INET;
addr2.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
if (connect (sv[1], (struct sockaddr ) &addr2, sizeof (addr2))
< 0)
{
perror ("* cannot connect; reason");
return -1;
}
if ((fd = accept (sv[0], (struct sockaddr ) &addr3,
&addr3_len)) < 0)
{
perror ("* cannot accept; reason");
return -1;
}
if (close (sv[0]) < 0)
{
perror ("** cannot close; reason");
return -1;
}
sv[0] = fd;
/** printf ("* returning sv[0]=%d sv[1]=%d\n", sv[0], sv[1]);
**/
/* okey dokey mom */
return 0;
}
#ifdef TEST_STANDALONE
/*
#if 1
if (inet_socketpair (AF_INET, SOCK_STREAM, 0, xv) < 0)
#else
if (socketpair (AF_UNIX, SOCK_STREAM, 0, xv) < 0)
#endif
{
fprintf (stderr, “cannot create fake socketpair\n”);
exit (1);
}
child = fork ();
if (child < 0)
{
perror (“cannot for a child; reason”);
exit (0);
}
if (child)
{
close (xv [0]);
dup2 (xv [1], 0);
dup2 (xv [1], 1);
execl ("/bin/sh", “sh”, “-c”, cmd, (char *) 0);
perror (“cannot execute child; reason”);
exit (1);
}
else {
close (xv [1]);
}
}
static void
run_cmd (str)
char *str;
{
char tmp [128];
int i, n;
if (strlen (str) != write (xv [0], str, strlen (str)))
{
perror (“cannot write message to child; reason”);
exit (1);
}
n = read (xv [0], tmp, 128);
if (n < 0)
{
perror (“cannot read message from child; reason”);
exit (1);
}
printf ("** got reply `");
for (i = 0; i < n; i++)
putchar (tmp );
printf ("’…\n");
}
main ()
{
/* hopefully the command does unbuffered io /
run_child ("/bin/cat");
run_cmd (“hi nase\n”);
}
#endif / TEST_STANDALONE /
/ end if socketpair-example3.c */
_Igor Kovalenko wrote:
You’re not doing anything wrong, except for attempt to use Unix domain
sockets which aren’t supported yet.
Alexey Kizilov wrote:
Hi.
I’m cannot find the socketpair function in the libraries.
\
Alexey Kizilov
alx@solvo.ru_