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Shell Programming and Scripting

Detect if script starts from queue

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# 15  
Old 08-16-2012
Add redirect , then cron not send email.
Code:
* * * * *   /some/command  >/dev/null 2>&1

This User Gave Thanks to kshji For This Post:
Lord Spectre
# 16  
Old 08-16-2012
Quote:
Originally Posted by kshji
Add redirect , then cron not send email.
Code:
* * * * *   /some/command  >/dev/null 2>&1

Thank you, but I notice that the error stop the rest of the script as reported in my post. So the problem is not only the generated mail!
But probably you have replied before I modified my post! Smilie
# 17  
Old 08-16-2012
I did warn you there'd be error message spam. I also told you how to deal with that. Redirect stderr into /dev/null so the messages don't go into your cron mails, but save that FD for later before you do so so you can restore it afterwards.

Your code already does this kind of redirection, you appeared to know how to do so already. I'll show you again though.

Code:
CheckInteractive ()
{

exec 10<&2 # Make a copy in FD 10
exec 2>/dev/null

if exec 7</dev/tty
then
  bold=`tput bold`
  normal=`tput sgr0`
  echo ; echo "${bold}WARNING: SCRIPT cannot start from command line, use parameters instead (interactive mode)!${normal}"
  exit                 
fi

exec 2>&10 # Restore stderr
exec 10>&- # Close the copy
}

This User Gave Thanks to Corona688 For This Post:
Lord Spectre
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