Re: Exec a script to determine further action based on return code.

[Knut Auvor Grythe]

On Thu, Jun 23, 2005 at 04:56:01PM -0700, Brandon Evans wrote:
> Here is an example that may help
> 
> control:
> #  This returns 1 if there is a /home partation, 0 if not
> ret_home = ( ExecResult(/bin/sh -c "df -l | grep -E '^/dev' | awk '{print 
> $NF}' | grep -c '^/home'"))
> 
> classes:
> # Here I use strcmp to check if ret_home is a 1 or 0
> #  if it is a 1, HomePart is defined
> HomePart = ( Strcmp("1","${ret_home}") )

What's the advantage of doing this, as opposed to this:

classes:
  HomePart = ( ReturnsZero(/bin/sh -c "df -l | grep '^/dev' | awk '{print $NF}' 
| grep -q '^/home$'") )

As far as I can see, that should do the same with less code. Plus, by
adding '$' to the end of the regex in the last grep, you avoid a false
positive on stuff like /home/a and /home/b (large sites often have to
split /home on multiple disks).

-- 
Knut Auvor Grythe
ITEA Systemdrift