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From: davies@uicsrd.csrd.uiuc.edu
Newsgroups: comp.lang.fortran
Subject: Re: ERR= and END=
Message-ID: <47900005@uicsrd.csrd.uiuc.edu>
Date: 1 Mar 89 18:51:00 GMT
References: <2291@unmvax.unm.edu>
Lines: 8
Nf-ID: #R:unmvax.unm.edu:2291:uicsrd.csrd.uiuc.edu:47900005:000:454
Nf-From: uicsrd.csrd.uiuc.edu!davies    Mar  1 12:51:00 1989


The standard leaves the values of iostat undefined, but it does require
that the value returned is negative for end-of-file, zero if the read
succeeds, and greater than zero if there was an error.  You should be
able to just test for zero to see if the read succeeded, if you don't
care why it failed.  (Of course, the original note was complaining that
he had to give both err= and end=. Adding another statement to test the
iostat can only be worse.)