Date: Sun, 25 Jun 2000 13:12:22 EDT From: "gerald stoller" <gerald_stoller@hotmail.com> To: dnelson@emsphone.com Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Passing values between shell-variables Message-ID: <20000625171223.15343.qmail@hotmail.com>
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Dan Nelson <dnelson@emsphone.com> resonded on
Thu, 22 Jun 2000 17:42:37 -0500 with
>In the last episode (Jun 22), gerald stoller said:
> > I want to take an integer value from one shell-variable and pass
> > a modified value to another shell-variable. First I tried setint_v
> > (after using local to get tbl structures for the two shell-variables)
> > and second I tried various forms of the var.c functions intval &
> > setint . To see if things worked, I print the shell-variable (to
> > which I assigned a value) afterwards, but neither path seems to have
> > succeeded. I may try getint next, and also make my tests more basic,
> > but if anyone could give me a good hint, I'd appreciate it.
> > One thing that puzzles me is can be illustrated by the following
>code:
> > struct tbl *var1 ;
> > int val1 ;
> >
> > var1 = local( "LINENO" , FALSE ) ;
> > getint( var1 , &val1 ) ;
> > printf( "%d %d\n" , var1->val.i , val1 ) ;
> > which gives differing values in the two fields (the val1 value appears
>to
> > be correct). Isn't val.i (from struct tbl ) where the integer (or is
>it
> > floating point?, but it is declared long ) is stored?
> > Please send a response directly to me, my bulk-mail folder is
> > over-stuffed.
>
>I'm not sure what local() and getint() are, since you didn't include
>the source to them, but you should probably be using the getenv() and
>putenv() functions to read environment variables.
>
>--
> Dan Nelson
> dnelson@emsphone.com
Sorry for leaving out info; local() and getint() are functions in the
file var.c of pdksh as is setint_v() , which I also tried. I am using
version 3.3 . struct tbl is a structure defined in the file table.h of
pdksh . Probably soon I will upgrade to version 4.1 or so. I want to
be able to work with general variables, not only environment variables, so I
don't feel that getenv() & putenv() are the way to go.
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