man-pages-3.50 is released
From: Michael Kerrisk (man-pages)
Date: Sat Mar 16 2013 - 12:38:17 EST
I've released man-pages-3.50 - man pages for Linux.
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-3.50 ====================
New and rewritten pages
Rewrite page, adding much more detail
Changes to individual pages
Port access permission bits (ioperm()) are turned off in the child
Note that iopl() level of 3 is needed to access ports
'num' is *bits* not bytes!
Linux 2.6.8 lifted the port limit to 65,536
From: Stas Sergeev <stsp <at> aknet.ru>
Subject: [patch][rfc] Larger IO bitmap
Date: 2004-05-07 19:55:03 GMT
ioperm() operates on the calling *thread* (not process)
Clarify meaning of 'turn_on' argument
Plus form formatting fixes.
Clarify that default state of permission bits in child is off
NOTES: add mention of /proc/ioports
SEE ALSO: add outb(2)
CAP_SYS_RAWIO is required to *raise* the I/O privilege level
Clarify that the two least significant bits of 'level' are what matter
SEE ALSO: add outb(2)
Add version information for all (other) syscalls
Elie De Brauwer
Document write and document the ioctl interface of /dev/random
The update consists out of two parts:
- a minor thing which just documents what happens if a write to
/dev/(u)random is performed, which is used in the example
script but not explicitly mentioned.
- the other (biggest) part is the documentation of the ioctl()
interface which /dev/(u)random exposes. This ioctl() lives in
drivers/char/random.c and the primitives can be found in
One comment remains, there used to be an RNDGETPOOL ioctl() which
disappeared in v2.6.9. I found two patches on the net:
But as far as I can tell the first one got applied but the 2nd
one seems more correct. The result is that even today one can
still find traces of the RNDGETPOOL ioctl() in the header files.
Is this there for historical reasons or because it might break
userspace, even though using it will just give an EINVAL.
Jose Luis Domingo Lopez
Document 'rootfstype' option
Add various pieces under CAP_SYS_RAWIO
Info obtained by grepping the kernel source.
Add CAP_SYS_RESOURCE /proc/PID/oom_score_adj case
Add a note about broadcast messages to multiple groups
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