Re: connecting to multiple hosts using Net::SSH2

[Jerald Sheets]

Thanks, Dr. R!  Good to see you on the newbie list!




--jms


On Mar 9, 2009, at 5:10 AM, Dr.Ruud wrote:

I'm only about 6 months into this thing myself, but appreciate all you've done.

Gunnar Hjalmarsson wrote:

Dr.Ruud wrote:

Gunnar Hjalmarsson wrote:

   eval { $ssh2->connect($_) };
   if ($@) {
       warn "Unable to connect host $_: $@" and next;
   }

That is the "old fashioned" way. You really need to use the return value of eval to make sure.

I don't see anything about that in "perldoc -f eval". Instead it says: "If there is a syntax error or runtime error, or a die statement is executed, an undefined value is returned by eval, and $@ is set to the error message. If there was no error, $@ is guaranteed to be a null string."

--
Ruud (the @@ guy)

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This has been discussed many times before. The best known example is a DESTROY with a die-ing eval, happening at leaving the eval bock scope. Since you don't have control over that, you should always check the result of the eval itself.

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