public inbox for glibc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug libc/16674] New: signal.h, sys/wait.h namespace for POSIX
@ 2014-03-07 21:27 jsm28 at gcc dot gnu.org
  2014-03-07 23:59 ` [Bug libc/16674] " cvs-commit at gcc dot gnu.org
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2014-03-07 21:27 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=16674

            Bug ID: 16674
           Summary: signal.h, sys/wait.h namespace for POSIX
           Product: glibc
           Version: 2.19
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: jsm28 at gcc dot gnu.org
                CC: drepper.fsp at gmail dot com

signal.h wrongly exposes symbols ILL_*, FPE_*, SEGV_* BUS_*, CLD_* and POLL_*
for pre-2008 POSIX versions although those symbols only became non-XSI in
POSIX.1-2008, and TRAP_* although even in POSIX.1-2008 they remain XSI symbols.
 Testing a patch.  As this is in bits/siginfo.h it also affects sys/wait.h
which also includes that header.

-- 
You are receiving this mail because:
You are on the CC list for the bug.


^ permalink raw reply	[flat|nested] 4+ messages in thread

* [Bug libc/16674] signal.h, sys/wait.h namespace for POSIX
  2014-03-07 21:27 [Bug libc/16674] New: signal.h, sys/wait.h namespace for POSIX jsm28 at gcc dot gnu.org
@ 2014-03-07 23:59 ` cvs-commit at gcc dot gnu.org
  2014-03-08  0:02 ` jsm28 at gcc dot gnu.org
  2014-06-13  6:36 ` fweimer at redhat dot com
  2 siblings, 0 replies; 4+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2014-03-07 23:59 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=16674

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU C Library master sources".

The branch, master has been updated
       via  5c7808498e9e1fd3df43aa2bd84fd47dc8e6ab7c (commit)
      from  bc61d27c616f517521826581f0401f5b81772a65 (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5c7808498e9e1fd3df43aa2bd84fd47dc8e6ab7c

commit 5c7808498e9e1fd3df43aa2bd84fd47dc8e6ab7c
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Fri Mar 7 23:57:56 2014 +0000

    Fix POSIX namespace for <bits/siginfo.h> (bug 16674).

    <bits/siginfo.h> causes symbols ILL_*, FPE_*, SEGV_* BUS_*, CLD_*,
    POLL_* and TRAP_* to be exposed in <signal.h> (and <sys/wait.h>), even
    though those symbols are not in non-XSI POSIX before POSIX.1-2008 and
    even in POSIX.1-2008 the TRAP_* symbols are XSI-only.  This patch
    conditions the symbols appropriately in the various <bits/siginfo.h>
    implementations (various <signal.h> and <sys/wait.h> conformtest
    issues remain for standards other than POSIX (1995/6)).  Tested
    x86_64.

        [BZ #16674]
        * bits/siginfo.h (ILL_ILLOPC): Condition on [__USE_XOPEN_EXTENDED
        || __USE_XOPEN2K8].
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * sysdeps/unix/sysv/linux/alpha/bits/siginfo.h (ILL_ILLOPC):
        Likewise.
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (BUS_MCEERR_AR): Likewise.
        (BUS_MCEERR_AO): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * sysdeps/unix/sysv/linux/bits/siginfo.h (ILL_ILLOPC): Likewise.
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (BUS_MCEERR_AR): Likewise.
        (BUS_MCEERR_AO): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * sysdeps/unix/sysv/linux/ia64/bits/siginfo.h (ILL_ILLOPC):
        Likewise.
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (ILL_BADIADDR): Likewise.
        (ILL_BREAK): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (FPE_DECOVF): Likewise.
        (FPE_DECDIV): Likewise.
        (FPE_DECERR): Likewise.
        (FPE_INVASC): Likewise.
        (FPE_INVDEC): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (SEGV_PSTKOVF): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (BUS_MCEERR_AR): Likewise.
        (BUS_MCEERR_AO): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (TRAP_BRANCH): Likewise.
        (TRAP_HWBKPT): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * sysdeps/unix/sysv/linux/mips/bits/siginfo.h (ILL_ILLOPC): Likewise.
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (BUS_MCEERR_AR): Likewise.
        (BUS_MCEERR_AO): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * sysdeps/unix/sysv/linux/s390/bits/siginfo.h (ILL_ILLOPC): Likewise.
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (BUS_MCEERR_AR): Likewise.
        (BUS_MCEERR_AO): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * sysdeps/unix/sysv/linux/sparc/bits/siginfo.h (ILL_ILLOPC): Likewise.
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (BUS_MCEERR_AR): Likewise.
        (BUS_MCEERR_AO): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * sysdeps/unix/sysv/linux/tile/bits/siginfo.h (ILL_ILLOPC): Likewise.
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (ILL_DBLFLT): Likewise.
        (ILL_HARDWALL): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (BUS_MCEERR_AR): Likewise.
        (BUS_MCEERR_AO): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * sysdeps/unix/sysv/linux/x86/bits/siginfo.h (ILL_ILLOPC): Likewise.
        (ILL_ILLOPN): Likewise.
        (ILL_ILLADR): Likewise.
        (ILL_ILLTRP): Likewise.
        (ILL_PRVOPC): Likewise.
        (ILL_PRVREG): Likewise.
        (ILL_COPROC): Likewise.
        (ILL_BADSTK): Likewise.
        (FPE_INTDIV): Likewise.
        (FPE_INTOVF): Likewise.
        (FPE_FLTDIV): Likewise.
        (FPE_FLTOVF): Likewise.
        (FPE_FLTUND): Likewise.
        (FPE_FLTRES): Likewise.
        (FPE_FLTINV): Likewise.
        (FPE_FLTSUB): Likewise.
        (SEGV_MAPERR): Likewise.
        (SEGV_ACCERR): Likewise.
        (BUS_ADRALN): Likewise.
        (BUS_ADRERR): Likewise.
        (BUS_OBJERR): Likewise.
        (BUS_MCEERR_AR): Likewise.
        (BUS_MCEERR_AO): Likewise.
        (TRAP_BRKPT): Condition on [__USE_XOPEN_EXTENDED].
        (TRAP_TRACE): Likewise.
        (CLD_EXITED): Condition on [__USE_XOPEN_EXTENDED ||
        __USE_XOPEN2K8].
        (CLD_KILLED): Likewise.
        (CLD_DUMPED): Likewise.
        (CLD_TRAPPED): Likewise.
        (CLD_STOPPED): Likewise.
        (CLD_CONTINUED): Likewise.
        (POLL_IN): Likewise.
        (POLL_OUT): Likewise.
        (POLL_MSG): Likewise.
        (POLL_ERR): Likewise.
        (POLL_PRI): Likewise.
        (POLL_HUP): Likewise.
        * conform/Makefile (test-xfail-POSIX/signal.h/conform): Remove.
        (test-xfail-POSIX/sys/wait.h/conform): Likewise.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                    |  359 ++++++++++++++++++++++++++
 NEWS                                         |    2 +-
 bits/siginfo.h                               |   76 +++---
 conform/Makefile                             |    2 -
 sysdeps/unix/sysv/linux/alpha/bits/siginfo.h |   80 +++---
 sysdeps/unix/sysv/linux/bits/siginfo.h       |   80 +++---
 sysdeps/unix/sysv/linux/ia64/bits/siginfo.h  |  116 +++++----
 sysdeps/unix/sysv/linux/mips/bits/siginfo.h  |   80 +++---
 sysdeps/unix/sysv/linux/s390/bits/siginfo.h  |   80 +++---
 sysdeps/unix/sysv/linux/sparc/bits/siginfo.h |   80 +++---
 sysdeps/unix/sysv/linux/tile/bits/siginfo.h  |   84 ++++---
 sysdeps/unix/sysv/linux/x86/bits/siginfo.h   |   80 +++---
 12 files changed, 765 insertions(+), 354 deletions(-)

-- 
You are receiving this mail because:
You are on the CC list for the bug.


^ permalink raw reply	[flat|nested] 4+ messages in thread

* [Bug libc/16674] signal.h, sys/wait.h namespace for POSIX
  2014-03-07 21:27 [Bug libc/16674] New: signal.h, sys/wait.h namespace for POSIX jsm28 at gcc dot gnu.org
  2014-03-07 23:59 ` [Bug libc/16674] " cvs-commit at gcc dot gnu.org
@ 2014-03-08  0:02 ` jsm28 at gcc dot gnu.org
  2014-06-13  6:36 ` fweimer at redhat dot com
  2 siblings, 0 replies; 4+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2014-03-08  0:02 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=16674

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
Fixed for 2.20.

-- 
You are receiving this mail because:
You are on the CC list for the bug.


^ permalink raw reply	[flat|nested] 4+ messages in thread

* [Bug libc/16674] signal.h, sys/wait.h namespace for POSIX
  2014-03-07 21:27 [Bug libc/16674] New: signal.h, sys/wait.h namespace for POSIX jsm28 at gcc dot gnu.org
  2014-03-07 23:59 ` [Bug libc/16674] " cvs-commit at gcc dot gnu.org
  2014-03-08  0:02 ` jsm28 at gcc dot gnu.org
@ 2014-06-13  6:36 ` fweimer at redhat dot com
  2 siblings, 0 replies; 4+ messages in thread
From: fweimer at redhat dot com @ 2014-06-13  6:36 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=16674

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

-- 
You are receiving this mail because:
You are on the CC list for the bug.


^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2014-06-13  6:36 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-03-07 21:27 [Bug libc/16674] New: signal.h, sys/wait.h namespace for POSIX jsm28 at gcc dot gnu.org
2014-03-07 23:59 ` [Bug libc/16674] " cvs-commit at gcc dot gnu.org
2014-03-08  0:02 ` jsm28 at gcc dot gnu.org
2014-06-13  6:36 ` fweimer at redhat dot com

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).