Very Computer

by **Douglas Siebe** » Thu, 04 Apr 1991 05:21:16

I have written a script in sh using named pipes to perform an unattended ftp
session. I would like to insert some form of error checking/detection in it to
check for conditions such as "Network unreachable" and "Connection timed out"
etc. I am using a command of the form:

ftp -n [address] < pipe > outfile &

where "pipe" is a named pipe created by "mknod pipe p" I suppose I could add
something of the form 2>errorfile to trap errors and if the file is of positive
size assume something has occurred which I do not wish. I am hoping for a
cleaner, better way though. Any ideas?
--
________________________________________________________________________

MBA Student (2nd year)
The University of Iowa

by **Jonathan I. Kame** » Fri, 05 Apr 1991 06:13:17

|> where "pipe" is a named pipe created by "mknod pipe p" I suppose I could add
|> something of the form 2>errorfile to trap errors and if the file is of positive
|> size assume something has occurred which I do not wish. I am hoping for a
|> cleaner, better way though. Any ideas?

Get /pub/expect.shar.Z from ftp.uu.net, and write your script in expect
instead of trying to do it the way you are now; I suspect it'll be much
easier. I believe you also need tcl to compile expect; tcl is available in
/pub/tcl.tar.Z on the same machine.

If you want to find out what expect is all about, you can retrieve and print
out (after uncompressing it) the postscript file /pub/expect.ps.Z, which is
probably the paper that Don Libes presented about expect at a Usenix.

--
Jonathan Kamens USnail:
MIT Project Athena 11 Ashford Terrace

Office: 617-253-8085 Home: 617-782-0710

Very Computer

Error trap/detection question in sh

Error trap/detection question in sh

Error trap/detection question in sh