linux-kernel - man-pages-4.01 is released

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Date:	Thu, 23 Jul 2015 20:50:28 +0200
From:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:	linux-kernel@...r.kernel.org
CC:	mtk.manpages@...il.com
Subject: man-pages-4.01 is released

Gidday,

The Linux man-pages maintainer proudly announces:

    man-pages-4.01 - man pages for Linux

This release includes two new man pages and makes changes 
in over 100 other pages, based on input and contributions from 
nearly 50 people.

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_4.01

A short summary of the release is blogged at:
http://linux-man-pages.blogspot.com/2015/07/man-pages-401-is-released.html

A selection of changes in this release that may be interesting
for readers of this list is shown below.

Cheers,

Michael

==================== Changes in man-pages-4.01 ====================


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.


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

rename.2
    Michael Kerrisk  [Miklos Szeredi]
        Document RENAME_WHITEOUT
            Heavily based on text by Miklos Szeredi.


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

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.

fallocate.2
    Namjae Jeon  [Michael Kerrisk]
        Document FALLOC_FL_INSERT_RANGE

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

mprotect.2
    Michael Kerrisk
        Note ENOMEM error that can occur when we reach limit on maximum VMAs

perf_event_open.2
    Vince Weaver  [Joerg Roedel]
        Exclude_host/exclude_guest clarification
    Vince Weaver
        Document PERF_SAMPLE_REGS_INTR

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.

recv.2
send.2
    Michael Kerrisk
        Explain some subtleties of MSG_DONTWAIT versus O_NONBLOCK

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

proc.5
    Michael Kerrisk  [Kees Cook]
        Document /proc/sys/kernel/sysctl_writes_strict
            Based on text in Documentation/sysctl/kernel.txt.

capabilities.7
    Michael Kerrisk
        CAP_SYS_ADMIN allows calling bpf(2)

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.

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.


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