Conference turris::digital_unix

9376.0. "LAT open port failture" by TAV02::ISRAEL () Thu Apr 03 1997 06:14

Hi there,

 My customer is writing a program that read and write from LAT terminal port. 
 He is using simple open(), read(), write() and close() calls. 
 He is using DIGITAL UNIX V4.0a and V4.0b. He also uses the BSD style ttys.

 His problem is when he tries to open the port once in a while a gets an 
 IO error (errno 5). Sometimes it can take up to few minutes until the 
 open() succeeded.

 While in error state, if we check the port on the terminal server (DS90M) 
 we can see that the port is in Idle state (i.e. no session is open). 
 We did some LAT-analysis and found out that no LAT-start commands are 
 coming from the UNIX.

 From the customer we know that his program can be terminated using a 
 "kill -9" command or it aborts abnormally. Because the customer is in a 
 middle of integration process he can�t help those process termination 
 procedures.

 Any help on how can we help the customer will be appreciated.


Thanks,
Israel Pascal.