Re: Shell Script help for backup

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От Bruce Momjian
Тема Re: Shell Script help for backup
Дата
Msg-id 200207290322.g6T3MMa27411@candle.pha.pa.us
обсуждение исходный текст
Ответ на Re: Shell Script help for backup  (ratlhead@ratlhead.com (ratlhead))
Ответы Re: Shell Script help for backup  (strange@nsk.yi.org)
Список pgsql-general
You can do 'zcat < file' to prevent the *.Z requirement.  Yes, head -n
should work fine.

---------------------------------------------------------------------------

ratlhead wrote:
> strange@nsk.yi.org wrote in message news:<20020723150902.A5173@nsk.yi.org>...
> > What's wrong with the solution I sent?
> >
> > And I doubt the checking for a 0k file will work for you as gzip will
> > create a 20 byte file even for a 0 byte input (some headers, etc.).
> >
> > Regards,
> > Luciano Rocha
>
> Luciano,
>
> Was wondering if you could provide some help with the solution you
> sent...
>
> [ "$( zcat /folder/pg_backup.$DATE.gzip | head -c1 | wc -c )" -eq 1 ]
>
> First, I can't seem to use zcat, because it likes to add on a ".Z" to
> the filename for some reason or another.  Also, I find with the
> version of 'head' installed on my machine, that -c isn't available,
> but instead, -n.  I tried changing that and zcat to cat, but was
> getting a fail on something that should be valid.
>
> This basically checks to see if the file contains data right?
>
> Thanks man!
>
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--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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