All
Enclosed are the minutes of the Sept 27th call
regards
Andrew
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Minutes of the 27th September 2018 Teleconference Austin-887 Page 1 of 1
Submitted by Andrew Josey, The Open Group. 30th September 2018
Attendees:
Don Cragun, IEEE PASC OR
Nick Stoughton, USENIX, ISO/IEC JTC 1/SC 22 OR
Geoff Clare, The Open Group
Mark Ziegast, SHware Systems Dev.
Eric Blake, Red Hat
Martin Rehak, Oracle, The Open Group OR
Joerg Schilling, FOKUS Fraunhofer
Apologies:
Andrew Josey, The Open Group
David Clissold, IBM
* General news
None.
* Outstanding actions
(Please note that this section has been flushed to shorten the minutes -
to locate the previous set of outstanding actions, look to the minutes
from 9 March 2018 and earlier)
* Current Business
Bug 1077: Recommend support for wide-character regcomp and regexec and/or
specify multi-byte behavior OPEN
http://austingroupbugs.net/bug_view_page.php?bug_id=1077
Andrew has completed the action to ping his Apple contact and is
awaiting a reply.
Bug 1122: POSIX should include gettext() and friends OPEN
http://austingroupbugs.net/view.php?id=1122
Left open as an action is still in progress to flesh out a complete proposal.
Bug 1134: Add getentropy interface OPEN
http://austingroupbugs.net/view.php?id=1134
Action: Andrew to add boilerplate response regarding a proposal for
new interface, and also to ask The Open Group OR if they would
sponsor this addition.
Action Completed.
Bug 0001133: find clarification on -xdev behavior for mounted filesystem within
primary Accepted as marked
http://austingroupbugs.net/view.php?id=1133
This item is tagged for Issue 8.
On page 255 line 8562 section <ftw.h>, add after FTW_MOUNT:
FTW_XDEV
The walk does not descend below directories that have a
different device ID than the starting directory.
On page 1397 line 46455 section nftw(), change:
If clear, nftw() shall report all files encountered during the walk.
to:
If clear, nftw() shall report all files encountered during the
walk, unless FTW_XDEV is set.
(Note that bug 0001210 has changes to the first part of the FTW_MOUNT
description to use wording similar to the FTW_XDEV wording below.)
On page 1397 line 46457 section nftw(), add after FTW_PHYS:
FTW_XDEV
If set, nftw() shall not descend below directories that
have a different device ID (st_dev) than path; that is,
when a directory with a different device ID is encountered,
nftw() shall report the directory itself (unless FTW_MOUNT
is set) but shall not report any files below the directory.
If clear, nftw() shall report all files encountered during
the walk, unless FTW_MOUNT is set.
Note: If both FTW_MOUNT and FTW_XDEV are set, nftw() obeys both
flags but the end result is the same as if FTW_XDEV were clear.
On page 1400 line 46568 section nftw(), add a new paragraph to APPLICATION
USAGE:
When restricting the walk to files on one file system, it can
sometimes be desirable for the crossing points themselves to
be reported and sometimes for them not to be reported. (Crossing
points are mount points and, if FTW_PHYS is clear, symbolic
links to directories on other file systems.) With FTW_XDEV
nftw() reports them and with FTW_MOUNT it does not. However,
with FTW_MOUNT it also does not report symbolic links to
non-directory files on other file systems (if FTW_PHYS is clear).
If there is a need for an application to exclude crossing points
but include symbolic links to non-directory files on other file
systems, this can be achieved by using FTW_XDEV and performing
a check such as the following in fn():
if (tflag == FTW_D && sb->st_dev != saved_dev)
return 0;
(where <tt>saved_dev</tt> is the st_dev value for path).
On page 2797 line 91941 section find, add before -xdev:
-mount
The primary shall always evaluate as true; it shall cause
find to act only on files that have the same device ID
(st_dev, see [xref to stat()]) as the path operand below
which they are encountered and cause find not to descend
below directories that have a different device ID than that
path operand. If any -mount primary is specified, it shall
apply to the entire expression even if the -mount primary
would not normally be evaluated.
On page 2797 line 91942 section find, change:
The primary shall always evaluate as true; it shall cause find not to
continue descending past directories that have a different device ID (st_dev,
see [xref to stat()]).
to:
The primary shall always evaluate as true; it shall cause find
not to descend below directories that have a different device
ID (st_dev, see [xref to stat()]) than the path operand below
which they are encountered; that is, when a directory with a
different device ID is encountered, find shall act on the
directory itself (unless -mount is specified) but shall not act
on any files below the directory.
On page 2801 line 92114 section find, add a new paragraph to
APPLICATION USAGE:
When restricting the search to files on one file system, it can
sometimes be desirable for the crossing points themselves to
be acted on and sometimes for them not to be acted on. (Crossing
points are mount points and, if the -L option is specified,
symbolic links to directories on other file systems.) The -xdev
primary acts on them and the -mount primary does not. However,
-mount also does not act on symbolic links to non-directory
files on other file systems (if -L is specified). If there is
a need for an application to exclude crossing points but include
symbolic links to non-directory files on other file systems,
this can be achieved by using two find commands as follows:
find -L dir -mount -type d -print
find -L dir -xdev ! -type d -print
(in a subshell whose output is piped to sort, if the order matters).
If both -mount and -xdev are specified, find obeys both primaries
but the end result is the same as if -xdev were not specified.
On page 2804 line 92246 section find, add a new paragraph to RATIONALE:
Historically, many find implementations supported -mount and
-xdev as synonymous primaries and earlier versions of this
standard only required support for -xdev. However, the behavior
of find with -xdev differed from that of the nftw() function
with FTW_MOUNT as regards whether the mount point itself was
included or excluded. Therefore the standard now requires support
for both primaries with slightly differing behaviors: -mount
behaves in the manner of nftw() with the traditional FTW_MOUNT
flag, and -xdev in the manner of nftw() with a new FTW_XDEV
flag.
On page 3076 line 102580 section pax, change:
When traversing the file hierarchy specified by a pathname, pax
shall not descend into directories that have a different device
ID (st_dev; see [xref to stat()]).
to:
When traversing the file hierarchy specified by a pathname, pax
shall not descend below directories that have a different device
ID (st_dev, see [xref to stat()]) than the specified pathname;
that is, when a directory with a different device ID is
encountered, pax shall process (archive or copy) the directory
itself but shall not process any files below the directory.
On page 3094 line 103290 section pax, add a new paragraph to
APPLICATION USAGE:
When restricting file hierarchy traversal to one file system,
it can sometimes be desirable for the crossing points themselves
to be processed (archived or copied) and sometimes for them not
to be processed. (Crossing points are mount points and, if the
-L option is specified, symbolic links to directories on other
file systems.) With the -X option pax processes them, but there
is no standard way to have pax not process them. However, this
can be achieved by using find to do the hierarchy traversal and
piping the output of find to pax (with the -d option); see the
APPLICATION USAGE for [xref to find].
Bug 1210: FTW_MOUNT and symbolic links to directories on other file systems
Accepted
http://austingroupbugs.net/view.php?id=1210
This item is marked for TC3-2008.
An interpretation is required.
The standard states the way in which the FTW_MOUNT flag is to be
processed, and conforming implementations must conform to this.
However, concerns have been raised about this which are being
referred to the sponsor.
Rationale:
The description of this flag in the standard does not match the way
historical implementations behaved. This changes the description
in the standard to match historic behavior.
Notes to the Editor (not part of this interpretation):
Make the changes suggested in the Desired Action.
Action: Andrew to start the interpretation timer.
Completed after the meeting
Bug 1136: awk: missing case where a bare array name may be used OPEN
http://austingroupbugs.net/view.php?id=1136
We worked on wording for this item and will pick up again on it next time.
Next Steps
----------
The next call is on October 4th 2018 (Thursday).
Calls are anchored on US time. (8am Pacific)
This call will be for the regular 90 minutes.
http://austingroupbugs.net
An etherpad is usually up for the meeting, with a URL using the date format as
below:
https://posix.rhansen.org/p/201x-mm-dd
username=posix password=2115756#
--------
Andrew Josey The Open Group
Austin Group Chair
Email: a.jo...@opengroup.org
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