Re: weird interaction between builtin cat and trap

[Chet Ramey]

On 4/15/22 2:34 PM, Peng Yu wrote:

> > The `same behavior' here is dying due to SIGPIPE before checking for a
> > write error. Is that the hill you're dying on?
>
> The point is that this error for builtin cat should be ignored.

So EPIPE should be ignored.

> Another way to demonstrate the problem is the even simpler code. There
> is no point to generate this kind of error. Otherwise, the external
> cat would have done so already.

This is just another example of the same scenario. There's nothing new
here. You want SIGPIPE-before-write-error behavior and the builtin cat
doesn't do things in that order.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/