晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //proc/thread-self/root/usr/share/doc/pam/txts/README.pam_console
README for pam_console
======================

NOTE: This software is very powerful.  Incautious use could leave your
system open to attack, or difficult to use.

pam_console is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Because pam_console integrates GPL-licensed code, all of pam_console
is licensed only under the GPL, unlike most PAM modules.  See the
file COPYING for the license terms under which this software is
licensed.

(If this software breaks your system, you get to keep all the pieces.)

The pam_console module exists to change file permissions when users
log on at the console, and to change them back when they log out of
the console.  It also cooperates with the pam_listfile module to
make it possible to allow users who are at the console to run
various programs that would otherwise be restricted to root only.

The pam_console.8 and pam_console_apply.8 man pages explain this
software in more detail.

Please note: the current version depends on too many external tools
and libraries, making it big and hard to evaluate for security.
This is only a bootstrap stage; I'll be fixing it later.  I'm using
lex/yacc right now so that it is trivial to change the grammar, and
I'm using glib because I didn't want to write my own hashtables
while I was busy thinking about file locking.  Don't report those
as bugs, I'll fix them later once I've ironed out the important
details...

Michael K. Johnson
Red Hat Software, Inc.

Additional note: the current version is improved so that the functionality
of changing the ownership and permissions of the devices is split out
of the pam_console.so module to the pam_console_apply executable,
which is called from the pam_console module when the lock is obtained.
Thus the module doesn't depend on the glib.

Copyright 1999, 2005 Red Hat, Inc.

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