From: Matthew Clarke (clamattelus.net)
Date: Fri Sep 03 2004 - 01:12:45 CDT

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jeudi, le 2 septembre, 2004, Greg Wooledge nous a dit ceci:

> Tomas (wishermyliu.m-1.lt) wrote:
>
> > sendmail -bd && cd /var/log/ && gunzip maillog.6.gz && more maillog.6 |
> mail
> > -s Test mymail \
>
> Han already gave you a working example, but here's why yours failed.
>
> This command:
>
> more maillog.6 | mail -s Test mymail
>
> cannot work properly in a non-interactive script. more(1) displays a
> file a page at a time, pausing for user input at the end of each page.
> Since your script is not interactive, it'll never get user input, so
> it'll never go on to the second page.
>
> If you had used cat(1) instead, then it might have worked, although
> it's not the most efficient way of going about it.

Actually, more(1) and less(1) detect whether their stdout is a tty, and,
if not, they simply dump their output without pausing for user input.

--
For a successful technology, reality must take precedence over public
relations, for nature cannot be fooled.
                                -- Richard P. Feynman

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