Re: [herbertx/dash] regression in reading variables from pipe for external processes (Issue #8)

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

On Tue, Jul 23, 2024 at 12:04:38PM +0000, arĉi wrote:
> this script
> ```shell
> printf '1\n2\n' | while read i; do
> 	/bin/echo "$i"
> done
> ```
> outputs
> ```
> 1
> ```
> while this script
> ```shell
> printf '1\n2\n' | while read i; do
> 	echo "$i"
> done
> ```
> outputs
> ```
> 1
> 2
> ```
> (as expected)
> both scripts emit second output on release.
> git-bisect revealed this was introduced in 44b15ea09a9ee5872cf477e4ffc6b42ef37d1e46

Thanks for the report.

This means that fallback code-path when tee(2) isn't available
isn't working.  Perhaps the seek testing isn't working as expected.

Unfortunately I couldn't reproduce this on Linux.  Please tell us
what OS you're using and provide a strace of the failing execution.

There was another similar report about this:

https://lore.kernel.org/dash/ZoiiE00rt95pkYYj@xxxxxxxxxxxxxxxxxxx/T/#t

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt