bugThe GNU Hurd - Bugs: bug #41907, Opening pipes RW with bash is...


bug #41907: Opening pipes RW with bash is blocking

Submitted by:  Victor Berger <levans>
Submitted on:  Wed 19 Mar 2014 03:32:22 PM UTC  
Category: Hurd ServersSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Standard Compliance
Status: NonePrivacy: Public
Assigned to: NoneOriginator Name: 
Open/Closed: OpenReproducibility: Every Time
Size (loc): NonePlanned Release: None
Effort: 0.00
Wiki-like text discussion box: 

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Thu 20 Mar 2014 01:37:29 AM UTC, comment #1:

I guess nobody thought about that case, and it's probably just bugged.

Samuel Thibault <sthibaul>
Project Member
Wed 19 Mar 2014 03:32:22 PM UTC, original submission:

In a bash shell, creating a fifo and opening it as a file descriptor for both reading and writing like this :

mkfifo foo
exec 11<>foo

Hangs forever, and killing the call with ^C writes a "broken pipe" error.

On a Linux system, running something like

mkfifo foo
exec 11<>foo
echo "bar" >&11
cat <&11

works as expected, but this does not seem to be specified by POSIX (opening a pipe for both read and write is undefined behaviour).

Is making this call blocking a Hurd choice, or a bug ?

Victor Berger <levans>


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  • -unavailable- added by sthibaul (Posted a comment)
  • -unavailable- added by levans (Submitted the item)

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