Andrew Josey
2014-10-10 15:39:12 UTC
All
Enclosed are the minutes of the 9th October 2014 Teleconference
regards
Andrew
——
Minutes of the 9 October 2014 Teleconference Austin-678 Page 1 of 1
Submitted by Andrew Josey, The Open Group. 10th October 2014
Attendees
Andrew Josey, The Open Group
David Clissold, IBM
Nick Stoughton, USENIX, ISO/IEC JTC 1/SC 22 OR
Mark Ziegast, SHware Systems
Don Cragun, IEEE PASC OR
Martin Rehak, Oracle, The Open Group OR
Geoff Clare, The Open Group
Eric Blake, Red Hat
Matthew Dempsky
Richard Hansen, BBN
Mark Brown, Canonical
Apologies
Joerg Schilling, FOKUS Fraunhofer
* 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
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.
Action: Andrew to followup on the outstanding items for 851,854 and 859 to
see if we can move them forward.
- Bug processing
There had been some discussion on the mailing list about rm -f with no
file operands, and how we might want to revisit bug 542.
Bug #542: rm -f with no file operands
http://austingroupbugs.net/view.php?id=542
It was agreed that the disposition is ok. but that an interpretation is required.
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:
The standard did not specify the behavior of the rm utility when
it is invoked with no operands. Recent implementations of the utility
all provide the behavior suggested so we are adding this extension
to the requirements since many applications use this feature.
Notes to the Editor (not part of this interpretation):
Make the changes suggested in the Desired Action.
Bug #872: REG_ICASE regex matching and negated bracket expr Accepted as Marked
http://austingroupbugs.net/view.php?id=872
This item is tagged for TC2-2008
On page 184 lines 5968-5970 (XBD 9.3.5 RE Bracket Expression), change:
A non-matching list expression begins with a <circumflex> ('^'),
and specifies a list that shall match any single-character
collating element except for the expressions represented in the
list after the leading <circumflex>.
to:
A non-matching list expression begins with a <circumflex> ('^'),
and the matching behavior shall be the logical inverse of the
corresponding matching list expression (the same bracket
expression but without the leading <circumflex>).
Bug #873: "link, linkat - link one file to another file relative to two directory file descriptors" Accepted as Marked
http://austingroupbugs.net/view.php?id=873
This item is tagged for TC2-2008
For the following lines:
page 565 line 19569 access
page 660 line 22337 chmod
page 664 line 22494 chown
page 1228 line 40780 link
page 1301 line 43016 mkdir
page 1307 line 43219 mkfifo
page 1391 line 49540 open
page 1797 line 57881 rename
page 2073 line 66122 symlink
page 2174 line 69164 unlink
page 2187 line 69579 utimensat/utimes
remove the phrases:
"relative to directory file descriptor"
"relative to two directory file descriptors"
Bug #874: pthread_once() rationale makes bogus claims Accepted as Marked
http://austingroupbugs.net/view.php?id=874
This item is tagged for TC2-2008
On page 1684 line 54506 section pthread_once()
and page 1685 line 54528 section pthread_once()
in the RATIONALE section, change from:
extern int initialize_random();
to:
extern void initialize_random(void);
On page 1685 line 54518 section pthread_once() in the RATIONALE section, change from:
For dynamic library initialization in a multi-threaded process,
a simple initialization flag is not sufficient; the flag needs
to be protected against modification by multiple threads
simultaneously calling into the library. Protecting the flag
requires the use of a mutex; however, mutexes have to be
initialized before they are used. Ensuring that the mutex is
only initialized once requires a recursive solution to this
problem.
The use of pthread_once() not only supplies an
implementation-guaranteed means of dynamic initialization, it
provides an aid to the reliable construction of multi-threaded
and realtime systems. The preceding example then becomes:
to:
For dynamic library initialization in a multi-threaded process,
if an initialization flag is used the flag needs to be protected
against modification by multiple threads simultaneously calling
into the library. This can be done by using a mutex (initialized
by assigning PTHREAD_MUTEX_INITIALIZER). However, the better
solution is to use pthread_once(), which is designed for exactly
this purpose, as follows:
AOB:
The meeting finished with a discussion on mechanisms for adding
features to shell
http://thread.gmane.org/gmane.comp.standards.posix.austin.general/9907
It was not conclusive.
Next Steps
----------
The next call is on October 16, 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:+44 118 9023044 US fax: +1 415 276 3760
Mobile:+44 774 015 5794 UK fax: +44 870 131 0418
Enclosed are the minutes of the 9th October 2014 Teleconference
regards
Andrew
——
Minutes of the 9 October 2014 Teleconference Austin-678 Page 1 of 1
Submitted by Andrew Josey, The Open Group. 10th October 2014
Attendees
Andrew Josey, The Open Group
David Clissold, IBM
Nick Stoughton, USENIX, ISO/IEC JTC 1/SC 22 OR
Mark Ziegast, SHware Systems
Don Cragun, IEEE PASC OR
Martin Rehak, Oracle, The Open Group OR
Geoff Clare, The Open Group
Eric Blake, Red Hat
Matthew Dempsky
Richard Hansen, BBN
Mark Brown, Canonical
Apologies
Joerg Schilling, FOKUS Fraunhofer
* 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
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.
Action: Andrew to followup on the outstanding items for 851,854 and 859 to
see if we can move them forward.
- Bug processing
There had been some discussion on the mailing list about rm -f with no
file operands, and how we might want to revisit bug 542.
Bug #542: rm -f with no file operands
http://austingroupbugs.net/view.php?id=542
It was agreed that the disposition is ok. but that an interpretation is required.
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:
The standard did not specify the behavior of the rm utility when
it is invoked with no operands. Recent implementations of the utility
all provide the behavior suggested so we are adding this extension
to the requirements since many applications use this feature.
Notes to the Editor (not part of this interpretation):
Make the changes suggested in the Desired Action.
Bug #872: REG_ICASE regex matching and negated bracket expr Accepted as Marked
http://austingroupbugs.net/view.php?id=872
This item is tagged for TC2-2008
On page 184 lines 5968-5970 (XBD 9.3.5 RE Bracket Expression), change:
A non-matching list expression begins with a <circumflex> ('^'),
and specifies a list that shall match any single-character
collating element except for the expressions represented in the
list after the leading <circumflex>.
to:
A non-matching list expression begins with a <circumflex> ('^'),
and the matching behavior shall be the logical inverse of the
corresponding matching list expression (the same bracket
expression but without the leading <circumflex>).
Bug #873: "link, linkat - link one file to another file relative to two directory file descriptors" Accepted as Marked
http://austingroupbugs.net/view.php?id=873
This item is tagged for TC2-2008
For the following lines:
page 565 line 19569 access
page 660 line 22337 chmod
page 664 line 22494 chown
page 1228 line 40780 link
page 1301 line 43016 mkdir
page 1307 line 43219 mkfifo
page 1391 line 49540 open
page 1797 line 57881 rename
page 2073 line 66122 symlink
page 2174 line 69164 unlink
page 2187 line 69579 utimensat/utimes
remove the phrases:
"relative to directory file descriptor"
"relative to two directory file descriptors"
Bug #874: pthread_once() rationale makes bogus claims Accepted as Marked
http://austingroupbugs.net/view.php?id=874
This item is tagged for TC2-2008
On page 1684 line 54506 section pthread_once()
and page 1685 line 54528 section pthread_once()
in the RATIONALE section, change from:
extern int initialize_random();
to:
extern void initialize_random(void);
On page 1685 line 54518 section pthread_once() in the RATIONALE section, change from:
For dynamic library initialization in a multi-threaded process,
a simple initialization flag is not sufficient; the flag needs
to be protected against modification by multiple threads
simultaneously calling into the library. Protecting the flag
requires the use of a mutex; however, mutexes have to be
initialized before they are used. Ensuring that the mutex is
only initialized once requires a recursive solution to this
problem.
The use of pthread_once() not only supplies an
implementation-guaranteed means of dynamic initialization, it
provides an aid to the reliable construction of multi-threaded
and realtime systems. The preceding example then becomes:
to:
For dynamic library initialization in a multi-threaded process,
if an initialization flag is used the flag needs to be protected
against modification by multiple threads simultaneously calling
into the library. This can be done by using a mutex (initialized
by assigning PTHREAD_MUTEX_INITIALIZER). However, the better
solution is to use pthread_once(), which is designed for exactly
this purpose, as follows:
AOB:
The meeting finished with a discussion on mechanisms for adding
features to shell
http://thread.gmane.org/gmane.comp.standards.posix.austin.general/9907
It was not conclusive.
Next Steps
----------
The next call is on October 16, 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:+44 118 9023044 US fax: +1 415 276 3760
Mobile:+44 774 015 5794 UK fax: +44 870 131 0418