man-pages-5.13 released

Gidday,

Alex Colomar and I are proud to announce:

man-pages-5.13 - man pages for Linux

This release resulted from patches, bug reports, reviews, and comments from 40 contributors. The release includes around 200 commits that changed approximately 120 pages.

Tarball download:
http://www.kernel.org/doc/man-pages/download.html
Git repository:
https://git.kernel.org/cgit/docs/man-pages/man-pages.git/
Online changelog:

    http://man7.org/linux/man-pages/changelog.html#release_5.13

A short summary of the release is blogged at:
https://linux-man-pages.blogspot.com/2021/08/man-pages-513-released.html

The current version of the pages is browsable at:
http://man7.org/linux/man-pages/

You are receiving this message either because:

a) You contributed to the content of this release.

b) You are subscribed to [email protected] or [email protected].

c) I have information (possibly inaccurate) that you are the maintainer of a translation of the manual pages, or are the maintainer of the manual pages set in a particular distribution, or have expressed interest in helping with man-pages maintenance, or have otherwise expressed interest in being notified about man-pages releases. If you don't want to receive such messages from me, or you know of some other translator or maintainer who may want to receive such notifications, send me a message.

Cheers,

Michael

==================== Changes in man-pages-5.13 ====================

Released: 2021-08-27, Christchurch

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:

Ahelenia Ziemiańska (наб) <[email protected]> Alan Peakall <[email protected]> Alejandro Colomar <[email protected]>
Alexis Wilke <[email protected]>
Askar Safin <[email protected]>
Christian Brauner <[email protected]> Christophe Leroy <[email protected]> Christopher Yeleighton <[email protected]> Cristian Morales Vega <[email protected]> Dan Robertson <[email protected]>
Darrick J. Wong <[email protected]>
Dominique Brazziel <[email protected]> EmanueleTorre <[email protected]>
Eric W. Biederman <[email protected]>
G. Branden Robinson <[email protected]> Helge Kreutzmann <[email protected]>
Jakub Wilk <[email protected]>
James O. D. Hunt <[email protected]>
Jonny Grant <[email protected]>
Kees Cook <[email protected]>
Kir Kolyshkin <[email protected]>
Kurt Kanzenbach <[email protected]>
kXuan <[email protected]>
Michael Kerrisk <[email protected]>
Michael Weiß <[email protected]> NeilBrown <[email protected]>
Nora Platiel <[email protected]>
Pali Rohár <[email protected]>
Peter Collingbourne <[email protected]>
Richard Palethorpe <[email protected]>
Rodrigo Campos <[email protected]>
Sagar Patel <[email protected]>
Serge E. Hallyn <[email protected]>
Sergey Petrakov <[email protected]>
Stefan Kanthak <[email protected]>
Štěpán Němec <[email protected]>
Thomas Gleixner <[email protected]>
Thomas Voss <[email protected]>
Viet Than <[email protected]>
Will Manley <[email protected]>

Apologies if I missed anyone!

New and rewritten pages
-----------------------

mount_setattr.2
Christian Brauner [Alejandro Colomar, Michael Kerrisk]
New manual page documenting the mount_setattr() system call

Removed Pages
-------------

getumask.3
Michael Kerrisk
This function was never implemented on Linux. It seems pointless to retain such a page 20 years after it was written.

Newly documented interfaces in existing pages
---------------------------------------------

futex.2
Kurt Kanzenbach [Alejandro Colomar, Thomas Gleixner, Michael Kerrisk]
Document FUTEX_LOCK_PI2

ioctl_tty.2
Pali Rohár [Alejandro Colomar, Michael kerrisk]
Document ioctls: TCGETS2, TCSETS2, TCSETSW2, TCSETSF2

pidfd_open.2
Michael Kerrisk
Document PIDFD_NONBLOCK

seccomp_unotify.2
Rodrigo Campos [Alejandro Colomar]
Document SECCOMP_ADDFD_FLAG_SEND

sigaction.2
Peter Collingbourne [Alejandro Colomar, Michael Kerrisk]
Document SA_EXPOSE_TAGBITS and the flag support detection protocol

statx.2
NeilBrown
Document STATX_MNT_ID

capabilities.7
user_namespaces.7
Michael Kerrisk, Kir Kolyshkin [Alejandro Colomar]
Describe CAP_SETFCAP for mapping UID 0

mount_namespaces.7
Michael Kerrisk [Christian Brauner, Eric W. Biederman]
More clearly explain the notion of locked mounts
For a long time, this manual page has had a brief discussion of "locked" mounts, without clearly saying what this concept is, or why it exists. Expand the discussion with an explanation of what locked mounts are, why mounts are locked, and some examples of the effect of locking.

user_namespaces.7
Michael Kerrisk
Document /proc/PID/projid_map

ld.so.8
Michael Kerrisk
Document --list-tunables option added in glibc 2.33

Global changes
--------------

A few pages
Michael Kerrisk
ERRORS: correct alphabetic order

A few pages
Michael Kerrisk
Place SEE ALSO entries in correct order

A few pages
Michael Kerrisk
Arrange .SH sections in correct order

Various pages
Michael Kerrisk
Fix EBADF error description
Make the description of the EBADF error for invalid 'dirfd' more uniform. In particular, note that the error only occurs when the pathname is relative, and that it occurs when the 'dirfd' is neither valid *nor* has the value AT_FDCWD.

Various pages
Michael Kerrisk
ERRORS: combine errors into a single alphabetic list
These pages split out extra errors for some APIs into a separate list. Probably, the pages are easier to ready if all errors are combined into a single list.

Note that there still remain a few pages where the errors are listed separately for different APIs. For the moment, it seems best to leave those pages as is, since the error lists are largely distinct in those pages.

Various pages
Michael Kerrisk
Terminology clean-up: "mount point" ==> "mount"
Many times, these pages use the terminology "mount point", where "mount" would be better. A "mount point" is the location at which a mount is attached. A "mount" is an association between a filesystem and a mount point.

accept.2
access.2
getpriority.2
mlock.2
Michael Kerrisk
ERRORS: combine errors into a single list
These pages split out errors into separate lists (perhaps per API, perhaps "may" vs "shall", perhaps "Linux-specific" vs standard(??)), but there's no good reason to do this. It makes the error list harder to read, and is inconsistent with other pages. So, combine the errors into a single list.

fanotify_mark.2
futimesat.2
mount_setattr.2
statx.2
symlink.2
mkfifo.3
Michael Kerrisk
Refer the reader to openat(2) for explanation of why 'dirfd' is useful

Various pages
Thomas Voss [Alejandro Colomar]
Consistently use '*argv[]'

Changes to individual pages
---------------------------

iconv.1
iconvconfig.8
Michael Kerrisk [Christopher Yeleighton]
FILES: note that files may be under /usr/lib64 rather than /lib/64
See https://bugzilla.kernel.org/show_bug.cgi?id=214163

ldd.1
Alejandro Colomar [EmanueleTorre]
Fix example command

add_key.2
keyctl.2
request_key.2
Michael Kerrisk [Dominique Brazziel]
Note that the "libkeyutils" package provides <keyutils.h>
See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992377

close_range.2
Michael Kerrisk, Alejandro Colomar
Glibc 2.34 has added a close_range() wrapper

execve.2
Michael Kerrisk [Nora Platiel]
The pathname given to interpreter is not necessarily absolute
Michael Kerrisk
SEE ALSO: getauxval(3)
getauxval(3) is useful background regarding execve(2).

fanotify_mark.2
Michael Kerrisk
ERRORS: add missing EBADF error for invalid 'dirfd'

ioctl_tty.2
Pali Rohár [Alejandro Colomar]
Update DTR example
Do not include unused (and incompatible) header file termios.h and include required header files for puts() and close() functions.

mount.2
Michael Kerrisk
ERRORS: add EPERM error for case where a mount is locked
Refer the reader to mount_namespaces(7) for details.
Michael Kerrisk
SEE ALSO: add mount_setattr(2)

open.2
Michael Kerrisk
Explicitly describe the EBADF error that can occur with openat()
In particular, specifying an invalid file descriptor number in 'dirfd' can be used as a check that 'pathname' is absolute.
Michael Kerrisk
Clarify that openat()'s dirfd must be opened with O_RDONLY or O_PATH
Michael Kerrisk
Add mount_setattr(2) to list of 'dirfd' APIs

open_by_handle_at.2
Michael Kerrisk
ERRORS: add missing EBADF error for invalid 'dirfd'

readv2.2
Will Manley [Alejandro Colomar]
Note preadv2(..., RWF_NOWAIT) bug in BUGS section

readv.2
pipe.7
Michael Kerrisk [наб]
Make text on pipe writes more general to avoid a confusion in writev(2)

seccomp.2
Eric W. Biederman [Kees Cook]
Clarify that bad system calls kill the thread (not the process)

syscalls.2
Michael Kerrisk
Add quotactl_fd(); remove quotactl_path()
quotactl_path() was never wired up in Linux 5.13. It was replaced instead by quotactl_fd(),
Michael Kerrisk
Add system calls that are new in 5.13

umount.2
Michael Kerrisk
ERRORS: add EINVAL for case where mount is locked

wait.2
Richard Palethorpe [Alejandro Colomar]
Add ESRCH for when pid == INT_MIN
Michael Kerrisk
ERRORS: document EAGAIN for waitid() on a PID file descriptor

getaddrinfo.3
Alejandro Colomar [Cristian Morales Vega]
Note that 'errno' is set in parallel with EAI_SYSTEM

getauxval.3
Michael Kerrisk
SEE ALSO: add execve(2)

getopt.3
James O. D. Hunt [Alejandro Colomar]
Further clarification of 'optstring'

pthread_setname_np.3
Michael Kerrisk [Alexis Wilke]
EXAMPLES: remove a bug by simplifying the code

strlen.3
wcslen.3
Michael Kerrisk [Alejandro Colomar, Jonny Grant]
Recommend alternatives where input buffer might not be null-terminated

strstr.3
Alejandro Colomar [Stefan Kanthak]
Document special case for empty needle

termios.3
Pali Rohár [Alejandro Colomar]
SPARC architecture has 4 different Bnnn constants
Pali Rohár [Alejandro Colomar]
Add information how to set baud rate to any other value
Pali Rohár [Alejandro Colomar]
Use bold style for Bnn and EXTn macro constants
Pali Rohár [Alejandro Colomar]
Document missing baud-rate constants

tsearch.3
Michael Kerrisk
NAME: add twalk_r

wcstok.3
Jakub Wilk
Fix type mismatch in the example

proc.5
Michael Kerrisk
Add /proc/PID/projid_map, referring reader to user_namespaces(7)
Michael Kerrisk
Remove duplicated /proc/[pid]/gid_map entry

mount_namespaces.7
Michael Kerrisk
Terminology clean-up: "mount point" ==> "mount"
Many times, this page uses the terminology "mount point", where "mount" would be better. A "mount point" is the location at which a mount is attached. A "mount" is an association between a filesystem and a mount point.
Michael Kerrisk
SEE ALSO: add mount_setattr(2)

namespaces.7
Štěpán Němec [Alejandro Colomar]
Fix confusion caused by text reorganization

path_resolution.7
Michael Kerrisk [Askar Safin]
Improve description of trailing slashes
See https://bugzilla.kernel.org/show_bug.cgi?id=212385

posixoptions.7
Alejandro Colomar [Alan Peakall]
Fix legacy functions list (s/getcwd/getwd/)

user_namespaces.7
Kir Kolyshkin [Alejandro Colomar]
Fix a reference to a kernel document
Michael Kerrisk [Eric W. Biederman]
Add a definition of "global root"

vdso.7
Michael Kerrisk [Christophe Leroy]
Update CLOCK_REALTIME_COARSE + CLOCK_MONOTONIC_COARSE info for powerpc
Alejandro Colomar [Christophe Leroy]
Add y2038 compliant gettime for ppc/32

Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/