exists command

[Dennis Malen]

Brian,

Thanks a lot. That really helps. At least you answered my question about the
use of the "exists" command. The rest is up to me to test.

Thanks!

Dennis Malen
----- Original Message ----- 
From: "Brian K. White" <brian at aljex.com>
To: "filePro mailing list" <filepro-list at seaslug.org>
Sent: Monday, December 06, 2004 10:56 PM
Subject: Re: exists command


>
> ----- Original Message ----- 
> From: "Dennis Malen" <dmalen at malen.com>
> To: "Kenneth Brody" <kenbrody at bestweb.net>
> Cc: <filepro-list at lists.celestial.com>
> Sent: Monday, December 06, 2004 6:37 PM
> Subject: Re: exists command
>
>
> > Ken,
> >
> > If I am not using a dummy variable to capture the value of exists, then
> > therein lies the problem.
> >
> > I am using:
> >
> > if:      exists("/tmp/rnx/banco.wp") le "0"
> > Then: (do something)
> >
> > There is no dummy variable to hold the value of exists.
> >
> > Am I correct?
>
> no there is nothing wrong with the way you have it.
>
> here is a line from a call table all my systems all use a LOT
> it very definitely works
>
>   If: exists(scanimg_svpix{"/"{scanimg_dnum{"-"{scanimg_c{"."{scanimg_fmt)
> gt "0"
> Then: scanimg_pgs[scanimg_c]=scanimg_c<scanimg_fmt ; goto gnx
>
> If it's not working for you then the place you need to focus attention on
is
> the contents of your variables and the way your expressions will resolve.
> You're using the command fine, just scrutinize the data your are feeding
it.
>
> Also look at the permissions of the file in question. Maybe user filepro
or
> user whoever doesn't have read permissions on it? Or maybe read and
execute
> permissions on the directory the file is in?
>
> Also double check what way you want to test. IE: my example above
evaluates
> true if the file exists.
> If you want to test for true if the file doesn't exist then just pick any
of
> the obvious changes:
> exists(file) lt "1" or exists(file) ne "1"
> exists(file) le "0" should work, but I don't happen to have any examples
> where I use it that way to prove it.
>
>
> > Dennis
> >
> > ----- Original Message ----- 
> > From: "Kenneth Brody" <kenbrody at bestweb.net>
> > To: "Dennis Malen" <dmalen at malen.com>
> > Cc: <filepro-list at lists.celestial.com>
> > Sent: Monday, December 06, 2004 6:25 PM
> > Subject: Re: exists command
> >
> >
> >> Dennis Malen wrote:
> >> >
> >> > I am using the exists command in the following manner:
> >> >
> >> > if:      exists("/tmp/rnx/banco.wp") le "0"
> >> > Then: (do something)
> >> >
> >> > Am I using exists wrong. I have quotes in the paren. If I take the
> > quotes out
> >> > I get an error.
> >> >
> >> > If the file does not exist I want it to do something.
> >>
> >> The statement you have is valid, and means "if the file doesn't exist
> >> [exists returns zero], or an error occurs checking if it exists [exists
> >> returns less than zero]".
> >>
> >> We can't answer "am I using exists wrong" without knowing what you are
> >> trying to do, and what "doesn't work".
> >>
> >> -- 
> >>
> >
+-------------------------+--------------------+----------------------------
> > -+
> >> | Kenneth J. Brody        | www.hvcomputer.com |
> > |
> >> | kenbrody/at\spamcop.net | www.fptech.com     | #include
> > <std_disclaimer.h> |
> >>
> >
+-------------------------+--------------------+----------------------------
> > -+
> >> Don't e-mail me at: <mailto:ThisIsASpamTrap at gmail.com>
> >>
> >>
> >>
> >>
> >
> >
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> >
>
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