Date: Fri, 15 Nov 2002 11:33:42 -0600 From: John <john@starfire.mn.org> To: freebsd-questions@FreeBSD.ORG Subject: Re: FTP and cron Message-ID: <20021115113342.A82992@starfire.mn.org> In-Reply-To: <20021115103931.A82781@starfire.mn.org>; from john@starfire.mn.org on Fri, Nov 15, 2002 at 10:41:24AM -0600 References: <20021115103931.A82781@starfire.mn.org>
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On Fri, Nov 15, 2002 at 10:41:24AM -0600, John wrote:
> I'm having fits running ftp from cron jobs. Shell or "expect"
> scripts that execute perfectly from the terminal fail in a seeminly non-
> deterministic variety of ways when run from cron.
Just for completeness, here are the cron results and redirected
file outputs, respectively, of the results of running the same
stripped-down script. This script doesn't do all the prework
that the "big" script does, but it still demonstrates the
problem. Following both outputs is the script itself.
The "set env(TERM) vt100" thing was just a desparation measure
I tried after reading in the expect man page about telnet hanging
if there is no TERM environment set. Since "new" ftp can do somewhat
sophisticated terminal things (progress bars), I thought it was
worth trying. No difference.
The only "cleverness" in this is to try to detect if things are
working correctly or not by use of the hash detection and the
"exp_continue". If you chop that out and adjust the timeout value
accordingly, it will take the script longer to fail (with a
slow connection, which is what I'm dealing with), but again,
the aggregate results are the same.
I wish to emphasize that it's not purely an "expect" thing. I get
the same aggregate results (a 0-length file created at the remote
site and nothing else) from shell scripts, just less feedback.
spawn ftp space.augsburg.edu
Connected to aug20.augsburg.edu.
220 space.augsburg.edu FTP server ready.
331 Password required for mtm.
230 User mtm logged in.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> progress off
Progress bar off.
ftp> hash 8192
Hash mark printing on (8192 bytes/hash mark).
ftp> put crewtestdump
local: crewtestdump remote: crewtestdump
200 PORT command successful.
ftp put timeout
spawn ftp space.augsburg.edu
Connected to aug20.augsburg.edu.
220 space.augsburg.edu FTP server ready.
331 Password required for mtm.
230 User mtm logged in.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> progress off
progress off
Progress bar off.
ftp> hash 8192
Hash mark printing on (8192 bytes/hash mark).
ftp> put crewtestdump
local: crewtestdump remote: crewtestdump
150 Opening BINARY mode data connection for crewtestdump.
#####
226 Transfer complete.
47150 bytes sent in 16.41 seconds (2.80 KB/s)
ftp> quit
quit
221-You have transferred 47150 bytes in 1 files.
221-Total traffic for this session was 47535 bytes in 1 transfers.
221-Thank you for using the FTP service on space.augsburg.edu.
221 Goodbye.
#!/usr/local/bin/expect
set env(TERM) vt100
set timeout 120
spawn ftp space.augsburg.edu
expect "ftp> "
send "progress off\r"
expect "ftp> "
send "hash 8192\r"
expect "ftp> "
send "put crewtestdump\r"
expect "ftp> " {puts "unexpected prompt"; exit} \# {exp_continue} timeout {puts "ftp put timeout"; exit} 226
expect "ftp> "
send quit\r
expect
--
John Lind
john@starfire.MN.ORG
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