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Top Forums Shell Programming and Scripting HELP: check if website is on, if not email Post 302230417 by era on Friday 29th of August 2008 11:01:56 AM
Old 08-29-2008
Which shell is this? Apart from using endif instead of fi the syntax isn't technically wrong for Bourne shell, but definitely ... eerie.

Code:
if ! ping -c 1 www; then
  mailx -s subject mail <<__HERE
Body of email message
__HERE
fi

This can be shortened to the slightly more obscure

Code:
ping -c 1 www ||   mailx -s subject mail <<__HERE
Body of email message
__HERE

If you specifically want to look for "Destination host unreachable" (which I do not recommend at all) the syntax for that would be something like

Code:
case `ping -c 1 www` in *"Destination host unreachable"*) mailx ... ;; esac

or

Code:
if ping -c 1 www 2>&1 | grep "Destination host unreachable" >/dev/null; then
  mailx ...
fi

 

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biff(1) 						      General Commands Manual							   biff(1)

NAME
biff - Notifies users when mail arrives SYNOPSIS
biff [y | n] DESCRIPTION
The biff command informs the system whether you want to be notified when mail arrives during the current terminal session. The following command enables notification: biff y The following command disables notification: biff n When mail notification is enabled, the From: and Subject: header lines and up to the first five lines of the message are displayed. The total display is 560 characters, or seven lines terminated by newline characters, whichever occurs first. The biff y command is often included in the $HOME/.login or $HOME/.profile file to be executed each time you log in. The biff command operates asynchronously. For synchronous notification, use the MAIL variable of sh or ksh, or the mail variable of csh. EXAMPLES
To display the current setting, enter: biff To be notified during the current terminal session whenever mail arrives, enter the following in your $HOME/.login or $HOME/.profile file: biff y FILES
Read by login shell (after login. User profile. SEE ALSO
Commands: comsat(8), csh(1), ksh(1), mail(1), mailx(1), Bourne Shell sh(1b), POSIX Shell sh(1p) biff(1)
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