Re: printf builtin bug?

[Chet Ramey]

> Machine Type: i586-mandrake-linux-gnu
>                                                                               
>   
> Bash Version: 2.05b
> Patch Level: 0
> Release Status: release
>                                                                               
>   
> Description:
>         printf builtin rounds some decimals incorrectly.
>                                                                               
>   
> Repeat-By:
>         $ printf %.f 1.000000000000000000001; echo
>         0
>         $ printf %.f 1.00000000000000000001; echo
>         0
>         $ printf %.f 1.0000000000000000001; echo
>         1
>         $ printf %.f 1.00000000000000000000; echo
>         1

The printf builtin doesn't really do any rounding itself.  It calls strtold
to convert the argument and printf to print it.  I'd say the problem lies in
the C library, especially since I can reproduce the above error only on
Red Hat Linux 8.0.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet )
                                                Live...Laugh...Love
Chet Ramey, ITS, CWRU    chet@po.cwru.edu    http://tiswww.tis.cwru.edu/~chet/