[NCLUG] Oops,

[Luke Jones]

For serious shall scripting, you probably need 'trap (1)' as well.

Luke

On Thursday, February 20, 2014, alan schmitz wrote:

> Is it possible to see anything useful by adding
> set -x
> to the beginning of the script and check the output?
> On Feb 20, 2014 9:38 PM, "Bob Proulx" <bob at proulx.com <javascript:;>>
> wrote:
>
> > Steve Wolf wrote:
> > > I agree.  --exclude makes your life much easier.  --recursion is the
> > > default behavior in tar, so I'd suggest
> >
> > Agreed to all.
> >
> > > #!/bin/sh
> > > pushd /home
> > > tar cvzpPf /mnt/UserBackup/BKkerrym2.tar.gz \
> > >   --exclude=kerrym2/KerrysStuff \
> > >   --exclude=kerrym2/Pictures \
> > >   --exclude=kerrym2/Downloads \
> > >   --exclude=kerrym2/.wine/drive_c \
> > >   kerrym2
> > > popd
> > > echo -e "\nBKkerrym2.sh done"
> > > return
> >
> > Hmm...  That depends upon the system.
> >
> >   rwp at dismay:~$ /bin/sh
> >   $ type pushd
> >   pushd: not found
> >   $ type popd
> >   popd: not found
> >   $
> >
> > It depends on if your system has /bin/sh symlinked to bash or not
> > since those are bash'isms.  Ubuntu, Debian, Mint, others, link it to
> > dash.  But the popd is not needed.  It isn't necessary to cd anywhere
> > at the end of the script when exiting.  Just exit the script.  And I
> > mean "exit 0" not "return" too.  :-) "return" is from shell functions
> > not the script itself.
> >
> > Amazingly echo is much less portable than people think.  I would avoid
> > the -e option.  If you really want escapes then "printf" is the best
> > most portable way to do that these days.  AFAIK the -p is only for
> > extracting from the tar file.  I also don't think the -P option
> > is needed either.  With that I suggest:
> >
> > #!/bin/sh
> > cd /home || exit 1
> > tar cvzf /mnt/UserBackup/BKkerrym2.tar.gz \
> >   --one-file-system \
> >   --exclude=kerrym2/KerrysStuff \
> >   --exclude=kerrym2/Pictures \
> >   --exclude=kerrym2/Downloads \
> >   --exclude=kerrym2/.wine/drive_c \
> >   kerrym2
> > if [ $? -ne 0 ]; then
> >   echo "Error: tar exited with an error" 1>&2
> >   exit 1
> > fi
> > echo "BKkerrym2.sh done"
> > exit 0
> >
> > If we keep passing it around and everyone adds something to it by the
> > end of the week we would have full option processing and online help
> > in there too.  :-)
> >
> > Bob
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-- 
Luke Jones  slukejones at gmail.com (828) 6-SLUKEJ