Minutes of the 2 October 2014 Teleconference

[Andrew Josey]

All
Enclosed are the Minutes of the 2 October 2014 Teleconference
regards
Andrew
-------

Minutes of the 2 October 2014 Teleconference Austin-677 Page 1 of 1
Submitted by Andrew Josey, The Open Group. 3rd October 2014



Attendees
Mark Ziegast, SHware Systems
Nick Stoughton, USENIX, ISO/IEC JTC 1/SC 22 OR
Don Cragun, IEEE PASC OR
Martin Rehak, Oracle, The Open Group OR
Geoff Clare, The Open Group
David Clissold, IBM
Joerg Schilling, FOKUS Fraunhofer
Eric Blake, Red Hat
Matthew Dempsky

Apologies
Richard Hansen, BBN
Andrew Josey, The Open Group

* General news

On the PASC PAR approval progress - still open. Don currently has the action to progress.


* Outstanding actions

+Bug 0000251: Forbid newline, or even bytes 1 through 31 (inclusive), in filenames OPEN
http://austingroupbugs.net/view.php?id=251
Don has an action to produce a proposal.

+Bug 0000561: NUL-termination of sun_path in Unix sockets OPEN
http://austingroupbugs.net/view.php?id=561
Eric has an action to update the proposal.

+Bug 0000573: Please add '+' to the portable filename character set OPEN
http://austingroupbugs.net/view.php?id=573
Joerg has an action to prepare a proposed change.

+Bug 0000592: consistent use of struct timespec OPEN
http://austingroupbugs.net/view.php?id=592
Jim had provided additional information in bugnote 1627.
This was discussed and Jim took an action to provide further information.

+Bug 0000598: OH shading and new interfaces OPEN
http://austingroupbugs.net/view.php?id=598
Eric has an action to propose a new solution with self-contained headers.

+Bug 0000517: EBNF support OPEN
http://austingroupbugs.net/view.php?id=517
Action on Joerg to look at this.

+Bug 0000633: SIGEV_THREAD delivery renders many signal interfaces unsafe
OPEN
http://austingroupbugs.net/view.php?id=633
We noted that feedback has settled down on the mailing list, and
will discuss next session.

+Bug 0000657: Conditions under which fmemopen() write a NUL to the buffer
are insufficiently specified OPEN
http://austingroupbugs.net/view.php?id=657
Eric has an action to propose wording to clarify the behavior for
fmemopen(), and also to contact the glibc developers to get their
feedback.

+Bug 0000658: Undefined/unspecified behavior clauses in description of
open have race conditions OPEN
http://austingroupbugs.net/view.php?id=658
It was noted that there is some overlap with changes in TC1. Eric took an
action to update the proposal to resolve the overlaps appropriately.

+Bug 0000615: pthread_setcancelstate should be async-signal-safe OPEN
http://austingroupbugs.net/view.php?id=615
We now have reports on AIX and Apple. Jim to report back on whether
pthread_cancelstate() is async-signal-safe on Solaris. Andrew to ask
HP whether pthread_cancelstate() is async-signal-safe on HP-UX.


+Bug 0000672: Necessary step(s) to synchronize filename operations on disk
OPEN
http://austingroupbugs.net/view.php?id=672

Geoff has a new proposed resolution in note 1618. Decided to solicit input
from FS developers. Eric to go to Linux, David to AIX and Jim to Solaris.
Jim has completed his action (see bugnote 1691).
Andrew should chase HP and Apple for input.

+Bug 0000663: Specification of str[n]casecmp is ambiguous reopened
http://austingroupbugs.net/view.php?id=663

Action on David to follow up with the IBM developers about the EBCDIC
collation sequence.

Bug 696 either NAME_MAX shouldn't be optional, or readdir_r() needs clarification
http://www.austingroupbugs.net/view.php?id=696

Don has an action to propose a resolution.

Bug 0000721: Internal storage vs static storage OPEN
http://austingroupbugs.net/view.php?id=721

This item is still open.

Bug 0000375: Extend test/[...] conditionals: ==, <, >, -nt, -ot, -ef OPEN
http://austingroupbugs.net/view.php?id=375

This is still left open due to discussions pending on the reflector.

Bug 0000789: Add set -o pipefail OPEN
http://austingroupbugs.net/view.php?id=789


* Current Business


- Open Actions
Bug #851: pthread_atfork orphans handlers in unloaded shared libraries OPEN
http://www.austingroupbugs.net/view.php?id=851

Action item: Andrew should try and contact to Finnbarr Murphy.
(Status: Andrew has sent a query to Finnbarr via linked.in
and also to his direct email - no update this week)


Bug #854: requirement for additional built-in utilities to be searched for via $PATH was not and is not existing practice OPEN
http://austingroupbugs.net/view.php?id=854

Action: Andrew to ask David Korn to comment on this bug and the previous email discussion of the issue (seq 21270).

Action completed - awaiting response from David.

Bug #859: Add posix_random family of interfaces OPEN
http://austingroupbugs.net/view.php?id=859

Action on The Open Group Base WG to respond whether they will sponsor.



- Bug processing

Bug 0000867: typographical issue in Shell Command Language 2.6.2 Accepted as Marked
http://austingroupbugs.net/view.php?id=867

This item is tagged for TC2-2008

On page 2329 lines 73947-73947 delete:

(For example, ${foo-bar}xyz} would result in the expansion of foo followed by the string xyz} if foo is set, else the string <tt>"barxyz}"</tt>).


After page 2330 line 74013 add:

${parameter-word}

This example demonstrates the difference between unset and set to the empty string, as well as the rules for finding the delimiting close brace.

foo=asdf
echo ${foo-bar}xyz}
asdfxyz}
foo=
echo ${foo-bar}xyz}
xyz}
unset foo
echo ${foo-bar}xyz}
barxyz}

(Editors: Please see the online version for bolding)

Bug 0000869: Concept of being "blocked" on a semaphore is not defined but needed for sem_destroy rules Reject
http://austingroupbugs.net/view.php?id=869

XBD 3.76 defines a Blocked Process (or Thread) as "A process (or
thread) that is waiting for some condition (other than the availability
of a processor) to be satisfied before it can continue execution."
By this definition, the thread is blocked by sem_wait(). Adding
additional language here does not clarify the situation.

Bug 0000870: Can sem_close be called when there are waiters blocked? Accepted as Marked

An interpretation is required. This item is tagged for TC2-2008

Interpretation response:
The standard does not speak to this issue, and as such no conformance
distinction can be made between alternative implementations based on
this. This is being referred to the sponsor.

Rationale:
There are current implementations which return mmap()ed memory and
therefore a sem_close() in this situation on such implementations
will result in undefined behavior.

Notes to the Editor (not part of this interpretation):

On page 1827 line 58866 after:

The effect of subsequent use of the semaphore indicated by sem
by this process is undefined.

add:

If any threads in the calling process are currently blocked on
the semaphore, the behavior is undefined.

ACTION: Andrew to start review of pending interps.

Bug 0000871: Missing potential error code, EOVERFLOW Accepted as Marked
http://austingroupbugs.net/view.php?id=871

This item is tagged for Issue 8

Although we agree that EAGAIN or ERANGE (as used in semop()) might
be better choices for this error, at least one implementation already
uses EOVERFLOW for this condition. We didn't find a compelling
reason to change existing practice.

Add to the sem_post() ERRORS section after P1837, L59190:

[EOVERFLOW] The semaphore value would exceed {SEM_VALUE_MAX}.


Next Steps
----------
The next call is on October 9, 2014 (a Thursday)

Calls are anchored on US time. (8am Pacific)

This call will be for the regular 90 minutes.

http://austingroupbugs.net

An IRC channel will be available for the meeting
irc://irc.freenode.net/austingroupbugs

An etherpad is usually up for the meeting, with a URL using the date format as below:

http://posix-aA9aGynHYqB/thfjNshNs9i2O/***@public.gmane.org:9001/p/201x-mm-dd
password=2115756#

--------
Andrew Josey The Open Group
Austin Group Chair Apex Plaza, Forbury Road
Email: a.josey-7882/***@public.gmane.org Reading,Berks.RG1 1AX,England
Tel:[phone] US fax: [phone]
Mobile:[phone] UK fax: [phone]