man-pages-3.43 is released

From: Michael Kerrisk (man-pages)
Date: Sun Oct 21 2012 - 02:40:24 EST


I've released man-pages-3.43.tar.gz - man pages for Linux.

Tarball download:
Git repository:
Online changelog:

A short summary of the release is blogged at:

The current version of the pages is browsable at:

A few changes in this release that may be of interest to readers of
this list are given below.



==================== Changes in man-pages-3.43 ====================

Newly documented interfaces in existing pages

Michael Kerrisk [Florian Weimer, Andreas Schwab]
Document secure_getenv(3)

Changes to individual pages

Michael Kerrisk [Fredrik Arnerup]
Describe timeout limitation in kernels < 2.6.37
The timeout argument has an upper limit. Any values above that
limit are treated the same as -1, i.e. to wait indefinitely.
The limit is given by:

#define EP_MAX_MSTIMEO min(1000ULL *
(LONG_MAX - 999ULL) / HZ)

That is, the limit depends on the size of a long and the timer
frequency. Assuming the a long is never smaller than 32 bits
and HZ never larger than 1000, the worst case is 35 minutes.
I think this should be mentioned under "BUGS".

Although this is likely to be fixed in the future
(, the problem exists in
at least 2.6.14 - 2.6.35. I don't know if select(2) and poll(2)
are affected.
Michael Kerrisk
Add pointer to select(2) for discussion of close in another thread

Michael Kerrisk [Trevor Woerner]
Note Linux's odd handling of the new_value==NULL case

Michael Kerrisk [Stephane Fillod]
Note behavior if monitored file descriptor is closed in another thread
Executive summary: a sane application can't rely on any
particular behavior if another thread closes a file descriptor
being monitored by select().


Simon Josefsson
Remove (apparently bogus) text claiming LOG_AUTH is deprecated
LOG_AUTH is in POSIX, and widely available. There
seems to be no basis to the claim it is deprecated.


Michael Kerrisk
Document /proc/sys/kernel/kptr_restrict
Michael Kerrisk [Kees Cook]
Document /proc/sys/fs/protected_symlinks
Based on text in Documentation/sysctl/fs.txt by Kees Cook
Michael Kerrisk [Kees Cook]
Document /proc/sys/fs/protected_hardlinks
Based on text in Documentation/sysctl/fs.txt by Kees Cook

Michael Kerrisk
Document interaction of CAP_SYSLOG and /proc/sys/kernel/kptr_restrict
Michael Kerrisk
Describe interpretation of slashes in dependency strings
Michael Kerrisk
Repeat note that LD_LIBRARY_PATH is ignored in privileged programs
This point is already noted when discussing search order for
libraries, but it's worth repeating under the specific discussion
of LD_LIBRARY_PATH further down the page.
Michael Kerrisk
Add some details for LD_PRELOAD

Michael Kerrisk
Linux man-pages maintainer;
Author of "The Linux Programming Interface";
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