Your message dated Sun, 13 Nov 2011 17:08:29 +0000
with message-id <[email protected]>
and subject line Fixed in perl 5.14
has caused the Debian Bug report #646016,
regarding perl: undefined behaviour in ext/POSIX/t/sysconf.t wrt FIFOs
to be marked as done.
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--
646016: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=646016
Debian Bug Tracking System
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--- Begin Message ---
Package: perl
Version: 5.14.2-1
Severity: normal
Tags: patch
Hi,
while compiling perl 5.14.2 on GNU/Hurd, I ran into what it seems a
undefined POSIX behaviour in ext/POSIX/t/sysconf.t.
my $fd = POSIX::open($fifo, O_RDWR)
or skip("could not open $fifo ($!)", 3 * @path_consts_fifo);
according to the POSIX open()[1] about O_RDWR,
The result is undefined if this flag is applied to a FIFO.
.... which is actually our case.
Apparently Linux and *FreeBSD (and maybe also OSes) accept this
behaviour, but on GNU/Hurd this causes the open() call to block
undefinitely. Given there's nothing done with the FIFO if not querying
{,f}pathconf() values, the proposed solution I attached is to change
the opening mode to "O_RDONLY | O_NONBLOCK".
[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html
Thanks,
--
Pino
--- a/ext/POSIX/t/sysconf.t
+++ b/ext/POSIX/t/sysconf.t
@@ -130,7 +130,7 @@
or skip("could not create fifo $fifo ($!)", 2 * 3 * @path_consts_fifo);
SKIP: {
- my $fd = POSIX::open($fifo, O_RDWR)
+ my $fd = POSIX::open($fifo, O_RDONLY | O_NONBLOCK)
or skip("could not open $fifo ($!)", 3 * @path_consts_fifo);
for my $constant (@path_consts_fifo) {
--- End Message ---
--- Begin Message ---
I believe that these bugs have all been fixed in perl 5.14, which
has now migrated from experimental to unstable.
Dominic.
--
Dominic Hargreaves | http://www.larted.org.uk/~dom/
PGP key 5178E2A5 from the.earth.li (keyserver,web,email)
--- End Message ---
