Date: Wed, 30 Jul 1997 13:20:37 -0400 From: Brian McGovern <bmcgover@cisco.com> To: questions@freebsd.org Cc: ivan@cyclades.com Subject: ENOENT on read? (Problem with tip) Message-ID: <199707301720.NAA00395@bmcgover-pc.cisco.com>
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I'm having problems with tip connecting to a serial port. I've tracked the
point of failure to the line just after the printf("Point 1\n"); below. I've
now reached the point where "I just don't get it" (tm).
I've found, from hunt.c, that its trying to open /dev/cuacA00, which is the
correct device, so the "No such file or directory" description in
/usr/include/sys/errno.h makes little sense. Also, the descriptor FD is
usually either 3 or 4, so its not that its a bad descriptor from the
open, either. Lastly, I don't see any calls to fnctl to set the socket
non-blocking (or in the open for that matter), so the read should
block until there is data.
Anyhow, any sugguestions are welcome.
-Brian
for (omask = 0;; sigsetmask(omask))
{
cnt = read(FD, buf, BUFSIZ);
if (cnt <= 0)
{
/* lost carrier */
if (cnt < 0 && errno == EIO)
{
sigblock(sigmask(SIGTERM));
intTERM();
/*NOTREACHED*/
}
else
if (cnt == 0 && errno == ENOENT)
{
printf("Point 1\n");
if (getppid() != 1)
kill(getppid(),SIGUSR1);
sigblock(sigmask(SIGTERM));
intTERM();
/*NOTREACHED*/
}
else
if (cnt < 0)
{
printf("Point 2\n");
if (getppid() != 1)
kill(getppid(),SIGUSR1);
sigblock(sigmask(SIGTERM));
intTERM();
/*NOTREACHED*/
}
continue;
}
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