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==================== Changes in man-pages-4.01 ====================
Released: 2015-07-23, Munich
Contributors
------------
The following people contributed patches/fixes or (noted in brackets
in the changelog below) reports, notes, and ideas that have been
incorporated in changes in this release:
Alexei Starovoitov <ast@plumgrid.com>
Andries E. Brouwer <Andries.Brouwer@cwi.nl>
Arjun Shankar <arjun@redhat.com>
Ashish Sangwan <a.sangwan@samsung.com>
Ben Woodard <woodard@redhat.com>
Carlos O'Donell <carlos@redhat.com>
Christoph Thompson <cjsthompson@gmail.com>
Cortland Setlow <cortland.setlow@gmail.com>
Daniel Borkmann <daniel@iogearbox.net>
David Leppik <dleppik@vocalabs.com>
Dilyan Palauzov <dilyan.palauzov@aegee.org>
Doug Klima <cardoe@gentoo.org>
Eric B Munson <emunson@akamai.com>
Florian Weimer <fweimer@redhat.com>
Hack NDo <hackndo@gmail.com>
Jann Horn <jann@thejh.net>
Jens Axboe <axboe@fb.com>
Jian Wen <wenjianhn@gmail.com>
Joerg Roedel <jroedel@suse.de>
Julian Orth <ju.orth@gmail.com>
Kees Cook <keescook@chromium.org>
Laszlo Ersek <lacos@caesar.elte.hu>
Marko Myllynen <myllynen@redhat.com>
Mehdi Aqadjani Memar <m.aqadjanimemar@student.vu.nl>
Michael Kerrisk <mtk.manpages@gmail.com>
Michal Hocko <mhocko@suse.cz>
Mike Frysinger <vapier@gentoo.org>
Mike Hayward <hayward@loup.net>
Miklos Szeredi <miklos@szeredi.hu>
Namhyung Kim <namhyung@gmail.com>
Namjae Jeon <namjae.jeon@samsung.com>
Nathan Lynch <nathan_lynch@mentor.com>
NeilBrown <neilb@suse.de>
Pádraig Brady <P@draigBrady.com>
Pavel Machek <pavel@ucw.cz>
Peter Hurley <peter@hurleysoftware.com>
Sam Varshavchik <mrsam@courier-mta.com>
Scot Doyle <lkml14@scotdoyle.com>
Stephan Mueller <stephan.mueller@atsec.com>
Tobias Stoeckmann <tobias@stoeckmann.org>
Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
Uwe Kleine-König <uwe+debian@kleine-koenig.org>
Vegard Nossum <vegard.nossum@oracle.com>
Ville Skyttä <ville.skytta@iki.fi>
Vince Weaver <vincent.weaver@maine.edu>
Zeng Linggang <zenglg.jy@cn.fujitsu.com>
文剑 <wenjianhn@gmail.com>
Apologies if I missed anyone!
New and rewritten pages
-----------------------
bpf.2
Alexei Starovoitov, Michael Kerrisk [Daniel Borkmann]
New page documenting bpf(2)
__ppc_get_timebase.3
Tulio Magno Quites Machado Filho
New page documenting __ppc_get_timebase() and __ppc_get_timebase_freq()
Glibc 2.16 was released with a new function for the Power
architecture that can read its Time Base Register.
Glibc 2.17 adds a function to read the frequency at which the Time
Base Register of Power processors is updated.
queue.3
Michael Kerrisk [David Leppik, Doug Klima]
Reimport from latest FreeBSD page
Long ago, Doug Klima noted that many macros were not
documented in the queue(3) page. Fix by reimporting from
latest [1] FreeBSD man page.
[1] Revision 263142, Modified Fri Mar 14 03:07:51 2014 UTC
This also fixes https://sourceware.org/bugzilla/show_bug.cgi?id=1506
This time, I'll learn from past mistakes and not convert
from 'mdoc' to 'man' macros.
Michael Kerrisk
Use subsections in DESCRIPTION
Michael Kerrisk
Remove SEE ALSO reference to nonexistent tree(3)
Michael Kerrisk
Use real hyphens in code samples
Michael Kerrisk
Comment out text for functions not in glibc
Michael Kerrisk
Replace HISTORY with CONFORMING TO
Newly documented interfaces in existing pages
---------------------------------------------
rename.2
Michael Kerrisk [Miklos Szeredi]
Document RENAME_WHITEOUT
Heavily based on text by Miklos Szeredi.
New and changed links
---------------------
__ppc_get_timebase_freq.3
Tulio Magno Quites Machado Filho
New link to new __ppc_get_timebase(3) page
LIST_EMPTY.3
LIST_FIRST.3
LIST_FOREACH.3
LIST_HEAD_INITIALIZER.3
LIST_INSERT_BEFORE.3
LIST_NEXT.3
SLIST_EMPTY.3
SLIST_ENTRY.3
SLIST_FIRST.3
SLIST_FOREACH.3
SLIST_HEAD.3
SLIST_HEAD_INITIALIZER.3
SLIST_INIT.3
SLIST_INSERT_AFTER.3
SLIST_INSERT_HEAD.3
SLIST_NEXT.3
SLIST_REMOVE.3
SLIST_REMOVE_HEAD.3
STAILQ_CONCAT.3
STAILQ_EMPTY.3
STAILQ_ENTRY.3
STAILQ_FIRST.3
STAILQ_FOREACH.3
STAILQ_HEAD.3
STAILQ_HEAD_INITIALIZER.3
STAILQ_INIT.3
STAILQ_INSERT_AFTER.3
STAILQ_INSERT_HEAD.3
STAILQ_INSERT_TAIL.3
STAILQ_NEXT.3
STAILQ_REMOVE.3
STAILQ_REMOVE_HEAD.3
TAILQ_CONCAT.3
TAILQ_EMPTY.3
TAILQ_FIRST.3
TAILQ_FOREACH.3
TAILQ_FOREACH_REVERSE.3
TAILQ_HEAD_INITIALIZER.3
TAILQ_INSERT_BEFORE.3
TAILQ_LAST.3
TAILQ_NEXT.3
TAILQ_PREV.3
TAILQ_SWAP.3
Michael Kerrisk
New links to queue.3
Global changes
--------------
Various pages
Michael Kerrisk [Andries E. Brouwer]
Remove "ABI" from "C library/kernel ABI differences" subheadings
The "ABI" doesn't really convey anything significant in
the title. These subsections are about describing differences
between the kernel and (g)libc interfaces.
Changes to individual pages
---------------------------
intro.1
Michael Kerrisk [Andries E. Brouwer]
Drop intro paragraph on '$?' shell variable
As Andries notes, this piece of text is rather out of place in
a page that was intended to provide a tutorial introduction for
beginners logging in on a Linux system.
locale.1
Marko Myllynen
A minor output format clarification
A minor clarification for the locale output format which was
brought up at
https://sourceware.org/bugzilla/show_bug.cgi?id=18516.
For reference, see
https://sourceware.org/bugzilla/show_bug.cgi?id=18516
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/locale.html
Add CONFORMING TO section
capget.2
Julian Orth
Clarify that hdrp->pid==0 is equivalent gettid() not getpid()
chroot.2
Jann Horn
chroot() is not intended for security; document attack
It is unfortunate that this discourages this use of chroot(2)
without pointing out alternative solutions - for example,
OpenSSH and vsftpd both still rely on chroot(2) for security.
Bind mounts should theoretically be usable as a replacement, but
currently, they have a similar problem (CVE-2015-2925) that hasn't
been fixed in ~6 months, so I'd rather not add it to the manpage
as a solution before a fix lands.
clock_getres.2
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
eventfd.2
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
execve.2
Michael Kerrisk
Elaborate on envp/argv as NULL behavior
_exit.2
Michael Kerrisk
Open stdio frames are not flushed, temporary files are deleted
Many years ago, text was added to the page saying that it is
implementation-dependent whether stdio streams are flushed and
whether temporary are removed. In part, this change appears to
be because POSIX.1-2001 added text related to this point.
However, that seems to have been an error in POSIX, and the
text was subsequently removed for POSIX.1-2008. See
https://collaboration.opengroup.org/austin/interps/documents/9984/AI-085.txt
Austin Group Interpretation reference 1003.1-2001 #085
fallocate.2
Namjae Jeon [Michael Kerrisk]
Document FALLOC_FL_INSERT_RANGE
Michael Kerrisk
Since Linux 4.2, ext4 supports FALLOC_FL_INSERT_RANGE
fcntl.2
Michael Kerrisk
OFD locks are proposed for inclusion in the next POSIX revision
getrlimit.2
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
getrusage.2
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
gettid.2
Michael Kerrisk
Note that for a thread group leader, gettid() == getpid()
iopl.2
Michael Kerrisk
Remove some historical libc5 and glibc 1 details
These details are ancient, and long ago ceased to be relevant.
ioprio_set.2
Michael Kerrisk [Jens Axboe]
Document meaning of ioprio==0
mlock.2
Michael Kerrisk [Mehdi Aqadjani Memar]
Document another ENOMEM error case
ENOMEM can occur if locking/unlocking in the middle of a region
would increase the number of VMAs beyond the system limit (64k).
mmap.2
Michal Hocko [Eric B Munson]
Clarify MAP_POPULATE
David Rientjes has noticed that MAP_POPULATE wording might promise
much more than the kernel actually provides and intends to provide.
The primary usage of the flag is to pre-fault the range. There is
no guarantee that no major faults will happen later on. The pages
might have been reclaimed by the time the process tries to access
them.
Michal Hocko [Eric B Munson]
Clarify MAP_LOCKED semantics
MAP_LOCKED had a subtly different semantic from mmap(2)+mlock(2)
since it has been introduced.
mlock(2) fails if the memory range cannot get populated to
guarantee that no future major faults will happen on the range.
mmap(MAP_LOCKED) on the other hand silently succeeds even if
the range was populated only partially.
Fixing this subtle difference in the kernel is rather awkward
because the memory population happens after mm locks have been
dropped and so the cleanup before returning failure (munlock)
could operate on something else than the originally mapped area.
E.g. speculative userspace page fault handler catching SEGV and
doing mmap(fault_addr, MAP_FIXED|MAP_LOCKED) might discard portion
of a racing mmap and lead to lost data. Although it is not clear
whether such a usage would be valid, mmap page doesn't explicitly
describe requirements for threaded applications so we cannot
exclude this possibility.
This patch makes the semantic of MAP_LOCKED explicit and suggests
using mmap + mlock as the only way to guarantee no later major
page faults.
Michael Kerrisk
ERRORS: point out that ENOMEM can occur even for munmap()
mprotect.2
Michael Kerrisk
Note ENOMEM error that can occur when we reach limit on maximum VMAs
open.2
read.2
write.2
Michael Kerrisk [Mike Hayward]
Clarify that O_NONBLOCK is a no-op for regular files and block devices
perf_event_open.2
Vince Weaver [Joerg Roedel]
Exclude_host/exclude_guest clarification
This patch relates to the exclude_host and exclude_guest bits added
by the following commit:
exclude_host, exclude_guest; Linux 3.2
commit a240f76165e6255384d4bdb8139895fac7988799
Author: Joerg Roedel <joerg.roedel@amd.com>
Date: Wed Oct 5 14:01:16 2011 +0200
perf, core: Introduce attrs to count in either host or guest mode
The updated manpage text clarifies that the "exclude_host" and
"exclude_guest" perf_event_open() attr bits only apply in the
context of a KVM environment and are currently x86 only.
Vince Weaver
Document PERF_SAMPLE_REGS_INTR
This patch relates to the addition of PERF_SAMPLE_REGS_INTR
support added in the following commit:
perf_sample_regs_intr; Linux 3.19
commit 60e2364e60e86e81bc6377f49779779e6120977f
Author: Stephane Eranian <eranian@google.com>
perf: Add ability to sample machine state on interrupt
The primary difference between PERF_SAMPLE_REGS_INTR and the
existing PERF_SAMPLE_REGS_USER is that the new support will
return kernel register values. Also if precise_ip is
set higher than 0 then the PEBS register state will be returned
rather than the saved interrupt state.
This patch incorporates feedback from Stephane Eranian and
Andi Kleen.
prctl.2
seccomp.2
Michael Kerrisk
Clarify that SECCOMP_SET_MODE_STRICT disallows exit_group(2)
These days, glibc implements _exit() as a wrapper around
exit_group(2). (When seccomp was originally introduced, this was
not the case.) Give the reader a clue that, despite what glibc is
doing, what SECCOMP_SET_MODE_STRICT permits is the true _exit(2)
system call, and not exit_group(2).
pread.2
read.2
readv.2
sendfile.2
write.2
Michael Kerrisk
Clarify that Linux limits transfers to a maximum of 0x7ffff000 bytes
See https://bugs.debian.org/629994 and
https://bugs.debian.org/630029.
pread.2
Michael Kerrisk
Rewrite RETURN VALUE section
(Also drop the text on pwrite() returning zero; that seems bogus.)
ptrace.2
Michael Kerrisk [Vegard Nossum]
PTRACE_O_TRACEEXIT clarification
readv.2
Michael Kerrisk
Remove BUGS heading
The text on mixinf I/O syscalls and stdio is a general point
of behavior. It's not a bug as such.
recv.2
send.2
Michael Kerrisk
Explain some subtleties of MSG_DONTWAIT versus O_NONBLOCK
rename.2
Michael Kerrisk
Michael Kerrisk
Note that RENAME_NOREPLACE can't be employed with RENAME_EXCHANGE
sched_setaffinity.2
Michael Kerrisk
Add an example program
Michael Kerrisk [Florian Weimer]
Explain how to deal with 1024-CPU limitation of glibc's cpu_set_t type
Michael Kerrisk
Mention the use of the 'isolcpus' kernel boot option
sched_setattr.2
Julian Orth
Remove a const attribute
The attr argument of sched_setattr was documented as const but the
kernel will modify the size field of this struct if it contains an
invalid value. See the documentation of the size field for details.
seccomp.2
Michael Kerrisk
SEE ALSO: add bpf(2)
send.2
Michael Kerrisk
Expand on subtleties of MSG_NOSIGNAL versus ignoring SIGPIPE
sigaltstack.2
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
socket.2
Stephan Mueller
Update documentation reference for AF_ALG
truncate.2
Michael Kerrisk
ERRORS: ftruncate() can fail if the file descriptor is not writable
utimensat.2
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
After research, We think utimensat() and futimens() are thread-safe.
But, there are not markings of utimensat() and futimens() in glibc
document.
clearenv.3
Zeng Linggang
ATTRIBUTES: Note function that is not thread-safe
dl_iterate_phdr.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
error.3
Zeng Linggang
ATTRIBUTES: Note functions that are/aren't thread-safe
fexecve.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
fpurge.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
fread.3
Andries E. Brouwer
Clarify terminology
In the "RETURN VALUE" section the word item is in italics
as if it were one of the function parameters. But the word
"item" occurs here for the first time, earlier the text
uses "element". [Patch improves this.]
fts.3
Zeng Linggang
ATTRIBUTES: Note functions that are/aren't thread-safe
getaddrinfo.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
getaddrinfo_a.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
getauxval.3
Michael Kerrisk
File capabilities also trigger AT_SECURE
Michael Kerrisk
(Briefly) document AT_HWCAP2
getgrent_r.3
Zeng Linggang
ATTRIBUTES: Note functions that are/aren't thread-safe
gethostbyname.3
Michael Kerrisk [Laszlo Ersek]
Remove mention of IPv6 addresses, which are not supported
As reported by Laszlo Ersek:
gethostbyname(3) fails to resolve the IPv6 address "::1",
but the manual page says: "If name is an IPv4 or IPv6 address,
no lookup is performed and gethostbyname() simply copies name
into the h_name field [...]".
Debian bug report:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=455762
glibc bug report:
http://sourceware.org/bugzilla/show_bug.cgi?id=5479
SUSv3 link for gethostbyname(3):
http://www.opengroup.org/onlinepubs/000095399/functions/gethostbyname.html
It seems that the glibc behavior is conformant, and the manual
page is in error.
getifaddrs.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
getnameinfo.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
getnetent_r.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
getprotoent.3
Zeng Linggang
ATTRIBUTES: Note functions that aren't thread-safe
getprotoent_r.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
getpw.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
getpwent_r.3
Zeng Linggang
ATTRIBUTES: Note functions that are/aren't thread-safe
getrpcent.3
Zeng Linggang
ATTRIBUTES: Note functions that are/aren't thread-safe
getrpcent_r.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
getrpcport.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
getservent.3
Zeng Linggang
ATTRIBUTES: Note functions that aren't thread-safe
getservent_r.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
gsignal.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
key_setsecret.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
malloc_get_state.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
malloc_info.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
malloc_stats.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
malloc_trim.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
MB_LEN_MAX.3
Michael Kerrisk
Clarify meaning of MB_LEN_MAX
Michael Kerrisk [Pádraig Brady]
MB_LEN_MAX is 16 in modern glibc versions
memcpy.3
Michael Kerrisk
NOTES: describe the glibc 2.13 changes that revealed buggy applications
Adding a note on this point seems worthwhile as a way of
emphasizing the point that the buffers must not overlap.
mq_notify.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
perror.3
Michael Kerrisk
Some wording improvements and clarifications
profil.3
Zeng Linggang
ATTRIBUTES: Note function that is not thread-safe
psignal.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
pthread_attr_init.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
Michael Kerrisk
Use "%zd" for printing size_t in example code
pthread_attr_setaffinity_np.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
pthread_cancel.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
pthread_cleanup_push.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
pthread_create.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
pthread_detach.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
pthread_getattr_np.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
pthread_join.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
pthread_setname_np.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
pthread_tryjoin_np.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
putgrent.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
rcmd.3
Zeng Linggang
ATTRIBUTES: Note functions that are/aren't thread-safe
resolver.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
rpc.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
rpmatch.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
sem_close.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
sem_open.3
Zeng Linggang
ATTRIBUTES: Note function that is thread-safe
setaliasent.3
Zeng Linggang
ATTRIBUTES: Note functions that are/aren't thread-safe
setlocale.3
Marko Myllynen
Update CONFORMING TO
http://pubs.opengroup.org/onlinepubs/9699919799/functions/setlocale.html
setlocale.3
Marko Myllynen
Tweak C/POSIX locale portability description
As discussed earlier, the current description might be a little
bit too stringent, let's avoid the issue by describing the
portability aspect on a slightly higher level.
References:
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap06.html
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html
http://pubs.opengroup.org/onlinepubs/9699919799/functions/setlocale.html
shm_open.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
strfmon.3
Marko Myllynen
Document strfmon_l(3)
Describe strfmon_l(3).
http://pubs.opengroup.org/onlinepubs/9699919799/functions/strfmon.html
Marko Myllynen
Fix CONFORMING TO
AFAICS strfmon(3) is now defined in POSIX and the glibc
implementation is as specified there.
http://pubs.opengroup.org/onlinepubs/9699919799/functions/strfmon.html
Marko Myllynen
Rewrite the example
I think the example is more accurate when we use the exact
locale names and also the Euro sign where appropriate.
xcrypt.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
xdr.3
Zeng Linggang
ATTRIBUTES: Note functions that are thread-safe
console_codes.4
Scot Doyle [Pavel Machek, Michael Kerrisk]
Add CSI sequence for cursor blink interval
Add a Console Private CSI sequence to specify the current
console's cursor blink interval. The interval is specified
as a number of milliseconds until the next cursor display
state toggle, from 50 to 65535.
null.4
Michael Kerrisk
Note that reads from /dev/zero are interruptible since Linux 2.6.31
core.5
Michael Kerrisk
Mention 'coredump_filter' boot option
host.conf.5
Michael Kerrisk
Wording fix: s/resolv+/the resolver library/
The term "resolv+" seems to be historical cruft.
hosts.equiv.5
Carlos O'Donell
Fix format, clarify IdM needs, and provide examples.
In some recent work with a Red Hat customer I had the opportunity
to discuss the fine nuances of the ruserok() function and related
API which are used to implement rlogin and rsh.
It came to my attention after working with QE on some automated
internal testing that there were no good examples in the hosts.equiv
manual page showing how the format was supposed to work for this
file and for ~/.rhosts, worse the "format" line showed that there
should be spaces between arguments when that would clearly lead
to incorrect behaviour. In addition some things that the format
allows you to write are just wrong like "-host -user" which makes
no sense since the host is already rejected, and should be written
as "host -user" instead. I added notes in the example to make it
clear that "-host -user" is invalid.
I fixed three things:
(a) The format line.
- Either +, or [-]hostname, or +@netgrp or -@netgrp.
- Either +, or [-]username, or +@netgrp or -@netgrp.
- You must specify something in the hostname portion so remove
optional brackets.
(b) Clarify language around credentials
- If the host is not trusted you must provide credentials to
the login system and that could be anything really and it
depends on your configuration e.g. PAM or whatever IdM you have.
(c) Provide real-world examples
- Provide several real world examples and some corner case
examples for how you would write something. Hopefully others
can add examples as they see fit.
Michael Kerrisk [Carlos O'Donell, Arjun Shankar]
Improve explanation in EXAMPLE
locale.5
Marko Myllynen
Document map to_inpunct, map to_outpunct
See e.g. fa_IR for reference.
Marko Myllynen
Document class in LC_CTYPE
See e.g. the locale zh_CN and
http://en.cppreference.com/w/cpp/string/wide/towctrans
http://en.cppreference.com/w/cpp/string/wide/wctrans
Marko Myllynen
Add iconv(1) reference
Marko Myllynen
Document character transliteration
See e.g. da_DK for reference.
(Not sure should we actually provide an example here?)
Marko Myllynen
Document era keywords
This patch completes the LC_TIME section - since these era
keywords are so tightly coupled, I'm providing them as a
single patch.
Based on
http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap07.html
http://www.open-std.org/jtc1/SC22/WG20/docs/n972-14652ft.pdf
Marko Myllynen
Document default_missing
Marko Myllynen
Document outdigit and alt_digits
See e.g. fa_IR for reference.
Marko Myllynen
Refer to locale(7) more prominently
It's probably a good idea to refer to locale(7) so that a reader
can check what a category is about before describing them in
detail.
Marko Myllynen
Document charclass and charconv
See e.g. the locales ja_JP and ko_KR and
http://en.cppreference.com/w/cpp/string/wide/towctrans
http://en.cppreference.com/w/cpp/string/wide/wctrans
Marko Myllynen
Copy is not exclusive in LC_CTYPE and LC_COLLATE
See e.g. da_DK for reference.
Marko Myllynen
Remove the FIXME for timezone
The timezone of LC_TIME is not in POSIX, only 6 (out of ~300)
glibc locales define it, the glibc code comment below from
glibc.git/programs/ld-time.c seems to suggest it's not a good
idea, and there's been a proposal in upstream [1] to remove the
existing timezone definitions from glibc locales so I think
it's actually better to leave this one undocumented:
/* XXX We don't perform any tests on the timezone value since this is
simply useless, stupid $&$!@... */
1) https://sourceware.org/ml/libc-alpha/2015-06/msg00098.html
Move the remaining LC_COLLATE FIXMEs together while at it.
Marko Myllynen
Fix country_isbn format
Both plain numbers and Unicode code points are used in
glibc locales but checking the code reveals that country_isbn
is handled like the rest of its category expect for country_num
which was clarified earlier.
Marko Myllynen
Sort according to the standard
Sort the options so that those defined in POSIX are listed first,
then followed by those defined in ISO/IEC TR 14652 in the order
of common convention in many widely used glibc locales.
Actual descriptions are unchanged.
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html
Marko Myllynen
Refer to strftime(3) where appropriate
The relationship between the locale time format syntax
and strftime() cannot be considered as obvious.
Marko Myllynen
Document map "totitle"
See e.g. locales/i18n for reference.
Michael Kerrisk [Marko Myllynen]
Remove BUGS section saying man page is not complete
To some degree, this is true of many pages. And anyway, this
page is much better after recent work by Marko.
proc.5
Michael Kerrisk
List /proc/vmstat fields
Michael Kerrisk
Tweak /proc/vmstat text
Michael Kerrisk
Add /proc/crypto entry with a pointer to further information
Michael Kerrisk [Kees Cook]
Document /proc/sys/kernel/sysctl_writes_strict
Based on text in Documentation/sysctl/kernel.txt.
Michael Kerrisk
Move misordered /proc/[pid]/timers entry
Michael Kerrisk
Refer to bpf(2) for explanation of /proc/sys/net/core/bpf_jit_enable
repertoiremap.5
Marko Myllynen
Symbolic names AKA mnemonics
A long time ago in glibc, repertoire maps were used (but they
were removed already in 2000), those mapping files were named
as mnemonics, so "mnemonic" is a term that would almost
certainly come up if somebody studies glibc side (perhaps even
the related standards like ISO 9945 [which I don't have access
to]) so I thought it's worth to mention to term in the man page
to make sure we're talking about the same thing, otherwise
someone might wonder is that something different or not.
IOW, symbolic names and mnemonics are often used interchangeably,
let's mention the other often used term in the page, too.
capabilities.7
Michael Kerrisk
CAP_SYS_ADMIN allows calling bpf(2)
locale.7
Marko Myllynen
LC_CTYPE determines transliteration rules on glibc systems
packet.7
文剑 [Cortland Setlow]
Fix description of binding a packet socket to an interface
pty.7
NeilBrown [Peter Hurley]
Clarify asynchronous nature of PTY I/O
A PTY is not like a pipe - there may be delayed between data
being written at one end and it being available at the other.
This became particularly apparent after
commit f95499c3030f
("n_tty: Don't wait for buffer work in read() loop")
in Linux 3.12
See also the mail thread at https://lkml.org/lkml/2015/5/1/35
Date Mon, 04 May 2015 12:32:04 -0400
From Peter Hurley <>
Subject Re: [PATCH bisected regression] input_available_p()
sometimes says 'no' when it should say 'yes'
rtld-audit.7
Ben Woodard
Use correct printf() specifier for pointer types
In the example code you used %x rather than %p in the example
code for an audit library. The problem is that it truncates the
pointers on 64b platforms. So you get something like:
la_symbind64(): symname = strrchr sym->st_value = 0x7f4b8a3f8960
ndx = 222 flags = 0x0 refcook = 8b53e5c8 defcook = 8b537e30
rather than:
la_symbind64(): symname = fclose sym->st_value = 0x7fa452dd49b0
ndx = 1135 flags = 0x0 refcook = 0x7fa453f395c8 defcook = 0x7fa453f32e30
This has bitten me a handful of times when playing around with
audit test libraries to investigate its behavior.
sched.7
Michael Kerrisk
Remove ancient, wildly optimistic prediction about future of RT patches
It seems the patches were not merged by 2.6.30...
socket.7
Michael Kerrisk
SEE ALSO: add bpf(2)
vdso.7
Nathan Lynch [Mike Frysinger]
Update for ARM
The 32-bit ARM architecture in Linux has gained a vDSO as of the
4.1 release. (I was the primary author.)
Document the symbols exported by the ARM VDSO.
Accepted kernel submission:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/332573.html
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