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From: muquit@garfield.ncat.edu (MUHAMMAD A. MUQUIT)
Newsgroups: comp.unix.questions
Subject: Re: The "if ( -e filename )" blues...
Message-ID: <1991Jun18.173828.22639@garfield.ncat.edu>
Date: 18 Jun 91 17:38:28 GMT
Sender: muquit@garfield.ncat.edu (MUHAMMAD A. MUQUIT)
Organization: North Carolina A&T State University
Lines: 74

In article <1991Jun17.195519.12713@murdoch.acc.Virginia.EDU> Edward Schwab
writes:
>Help!  I'm trying to run a simple csh shell file that sets $OUT.out to an
>output filename and $PROG to a program name, will search for $OUT.out, and
>delete it...  I'm trying to do an "if ( -e $OUT.out ) set x=$<", which will
>wait for an ENTER before continuing with the program...  The only thing is
>that the "if ( -e )" statement (that searches for the existance of the file)
>runs if there is an actual $OUT.out file or not...  **sigh**  How can I make
>this wait for an enter keypress ONLY if $OUT.out exists???  All of the other
>if -e's work (the echos and the rm...)  BTW, the actual executable is called
>.$PROG; this is called up by $PROG...  :)
>
>I hope this message makes SOME sense when you look at the actual shell script
>below:
>-----------------------------------------------------------------------------  
>#!/bin/csh
>setenv OUT for005
>setenv PROG asymtc1
>if ( -e $OUT.out ) clear
>if ( -e $OUT.out ) echo '******************************************************'
>if ( -e $OUT.out ) echo 'You have a leftover '$OUT'.out file.  Since '$PROG''
>if ( -e $OUT.out ) echo 'will end up choking on this leftover file,  I am going'
>if ( -e $OUT.out ) echo 'to  delete  it  for  you.  If  you  do not  want me to'
>if ( -e $OUT.out ) echo 'delete it, hit ^C, ENTER, and rename it to a different'
>if ( -e $OUT.out ) echo '                      filename.'
>if ( -e $OUT.out ) echo '******************************************************'
>if ( -e $OUT.out ) echo ' '
>if ( -e $OUT.out ) echo ' If you want it deleted, press ENTER now to continue.'
>if ( -e $OUT.out ) set x=$<
>if ( -e $OUT.out ) rm $OUT.out
>.$PROG
>echo 'Now filtering...'
>mv $OUT.out $OUT.asa
>asa $OUT.asa >$OUT.out
>rm $OUT.asa
>echo ' '
>echo 'Done!  File written to '$OUT.out'.'
>echo ' '
>-------------------------------------------------------------------------------
> 
>			Thanks, 
>				- Ed  (eas@turing.acs.virginia.edu)
>				      (eschwab@polaris.cv.nrao.edu)


What about this?

-----------------------------------------
#!/bin/csh
setenv OUT for005
setenv PROG asymtc1
if ( -e $OUT.out ) then 
echo -n "continue [y]?"
set x=$<
if ( $x != n ) then
echo "Things you want to do here"
endif
else
echo "file does not exist, exiting shell"
endif
------------------------------------------
is this what you want?
Thanks.

- -
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: Muhammad A. Muquit                 Office: 126 Graham Hall          :
: Graduate Student                   Phone: (919) 334-7737 ext 53     :
: Dept. of Civil Engineering         e-mail: muquit@garfield.ncat.edu :
: North Carolina A&T State University    or, muquit@vanity.ncat.edu   :
: Greensboro, NC 27411                                                :
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--