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Full Discussion: Expect script cronjob running but dying prematurely
Top Forums Shell Programming and Scripting Expect script cronjob running but dying prematurely Post 302564897 by CluelessPerson on Saturday 15th of October 2011 09:14:15 AM
Old 10-15-2011
Expect script cronjob running but dying prematurely
I have an Ubuntu machine that I'd like to update automatically. I've written an expect script to run the aptitude package manager and update my packages. Essentially it does:
Code:
aptitude update && aptitude upgrade

while answering "yes" at the appropriate time.

It works quite nicely when run directly from the command line. However, when the cronjob I set up runs it (as root), it dies very quickly. In an attempt to figure out what's going wrong, I 'tee'd' the output into a log. In the "aptitude update" stage, it only updates maybe 1/6 of the total sources before inexplicably terminating. It never reaches the "upgrade" stage.

Does anyone have any idea what I might be doing wrong or have any way I might be able to diagnose why the script is quitting early?

Here's the script:
Code:
#!/usr/bin/expect -f

set timeout 180
spawn aptitude update

expect {
   eof
}

set timeout 3600
spawn aptitude safe-upgrade

expect {
    "Y/n" { send "y\r"; expect { eof } } \
    eof
}

And here's my crontab line:
Code:
        *       */12    *       *       *       /home/jimmy/script/patch.sh | tee /home/jimmy/script/patch.log

 

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LEARN ABOUT DEBIAN

daptup

DAPTUP(8)						      System Manager's Manual							 DAPTUP(8)

NAME

       daptup - wrapper script on 'apt-get update'

SYNOPSIS

       daptup [ --pre | --post | --last ] [ -h | --help ] [ --nocolor ]

OPTIONS

       --pre  Do only 'pre' stage: collect info that will be used as 'old'. Usually need to be specified only in apt hooks.

       --post If  appropriate option is enabled in config file, do only 'post' stage: collect 'new' info and output changes. Otherwise do nothing.
	      Usually need to be specified only in apt hooks.

       --last Output changes only. This option is supposed to be specified when you want to see changes made in the last update. Note that list of
	      outdated packages, if daptup is configured to output it, will be rebuilt.

       -h --help
	      prints the help

       --nocolor
	      Disables	color  output, useful for scripts or when output is not terminal. Now works only with --last option, however, you can dis-
	      able color globally in configuration file.

       daptup is a script that runs "apt-get update" inside and outputs list of packages recently entered to repo, list of packages which got  new
       updates, list of changes in 'watched' packages and, optionally, list of outdated packages.

       Starting with 0.8.0 version, daptup uses apt hooks and you don't need to explicitly call it if you use 'apt-get update'.

TROUBLESHOOTING

       If  daptup was interrupted while building the lists, the cached lists can stay in inconsistent state, which is inappropriate if you want to
       use --last option before the new update. There is nothing to do if interrupt was occured  at  the  moment  when	old  lists  were  building
       (besides  running  the  new  update). However, if interrupt was occured when the new lists were building, you can easily redo this stage by
       calling 'daptup --post'.

FILES

       /etc/daptup.conf
	      self-documented configuration file

       /var/spool/daptup/outdated
	      cached file with info about outdated packages

SEE ALSO

       apt-get(8), aptitude(8), apt-show-versions(1p)

AUTHOR

       daptup was written by Eugene V. Lyubimkin.

       This manual page was written by Eugene V. Lyubimkin <jackyf.devel@gmail.com>, for the Debian project (but may be used by others).

								   Oct 15, 2008 							 DAPTUP(8)
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