URL:
<http://savannah.gnu.org/bugs/?48372>
Summary: read with size 0 from fifo blocks
Project: The GNU Hurd
Submitted by: kon
Submitted on: Fri Jul 1 22:00:01 2016
Category: Hurd Servers
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Standard Compliance
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Reproducibility: Every Time
Size (loc): None
Planned Release: None
Effort: 0.00
Wiki-like text discussion box:
_______________________________________________________
Details:
mkfifo da; sleep 1000 > da & rpctrace perl -e 'sysread STDIN, $_, 0' < da
hangs at: 136<--159(pid1132)->io_read (-1 0)
According to antrik, POSIX specifies that read with nbyte==0 must immediately
return 0 or return an error. This could be implemented in libc, libtrivfs,
fifo, or libpipe. It seems best to implement this in fifo or libpipe so that
fifo can still return EBADF if the fifo was not opened for reading.
I filed this as distinct from bug 48371 (for the streamio translator) because
they can be fixed and tested independently.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?48372>
_______________________________________________
Message sent via/by Savannah
http://savannah.gnu.org/
