/usr/share/doc/ruby-shadow/README.euc is in ruby-shadow 2.4.1-1+b3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | Shadow Password module
Copyright (C) 1998-1999 Takaaki Tateishi <ttate@jaist.ac.jp>
Modified at: <1999/8/19 06:48:01 by ttate>
License: See LICENSE
1. ³µÍ×
linux¤Ë¤ª¤¤¤Æshadow password¥Õ¥¡¥¤¥ë¤ò°·¤¦¤¿¤á
¤Î¥â¥¸¥å¡¼¥ë¡£
2. ¥¤¥ó¥¹¥È¡¼¥ë
ruby extconf.rb
make
make install
* Ãí°Õ
shadow-1.3¤Ç¤Ïruby-1.3¤â¤·¤¯¤Ï¤½¤ì°Ê¹ß¤Î¥Ð¡¼¥¸¥ç¥ó
¤¬É¬ÍפǤ¹¡£
3. Shadow::Passwd¥â¥¸¥å¡¼¥ë¤Î¥á¥½¥Ã¥Éã
getspent
getspnam(name)
setspent
endspent
fgetspent(file)
sgetspent(str)
putspent(entry,file)
lckpwdf,lock
ulckpwdf,unlock
lock?
4. Structure
Shadow::Passwd::Entry (Struct::PasswdEntry)
sp_namp - pointer to null-terminated user name.
sp_pwdp - pointer to null-terminated password.
sp_lstchg - days since Jan 1, 1970 password was last
changed.
sp_min - days before which password may not be changed.
sp_max - days after which password must be changed.
sp_warn - days before password is to expire that user is
warned of pending password expiration.
sp_inact - days after password expires that account is
considered inactive and disabled.
sp_expire - days since Jan 1, 1970 when account will be
5. ÀâÌÀ
getspent, getspname, fgetspent, sgetspent¤ÏShadow::Passwd::Entry
¥¹¥È¥é¥¯¥Á¥ã¤òÊÖ¤·¤Þ¤¹¡£getspent ¤Ï¥Õ¥¡¥¤¥ë¤«¤é¼¡¤Î¥Ñ¥¹¥ï
¡¼¥É¥¨¥ó¥È¥ê¤òÊÖ¤·¡¢fgetspent ¤ÏÍ¿¤¨¤é¤ì¤¿IO¤«¤é¼¡¤Î¥¨¥ó¥È
¥ê¤òÊÖ¤·¤Þ¤¹¡£sgetspent¤ÏÍ¿¤¨¤é¤ì¤¿Ê¸»úÎ󤫤éShadow::Passwd::Entry
¥¹¥È¥é¥¯¥Á¥ã¤òÊÖ¤·¤Þ¤¹¡£getspnam¤Ï¥æ¡¼¥¶Ì¾¤òÍ¿¤¨¤ë¤È/etc/shadow
¤«¤é¤½¤Î¥æ¡¼¥¶¤ÎShadow::Passwd::Entry¥¹¥È¥é¥¯¥Á¥ã¤òÊÖ¤·¤Þ¤¹¡£
¥Õ¥¡¥¤¥ë¤Î½ªÃ¼¤Ë㤹¤ë¤Ènil¤ÎÃͤòÊÖ¤·¤Þ¤¹¡£
setspent,endspent¤Ï¤½¤ì¤¾¤ì¡¢¥Õ¥¡¥¤¥ë¤Ø¤Î¥¢¥¯¥»¥¹¤Î¤Ï¤¸¤á¤È
¤ª¤ï¤ê¤Ë»È¤¤¤Þ¤¹¡£
lckpwdf(lock),ulckpwdf(unlock)¤Ï/etc/shadow¤Ø¤ÎÇÓ¾Ū¥¢¥¯¥»¥¹
¤ò¼Â¸½¤¹¤ë¤¿¤á¤Ë¤¢¤ê¤Þ¤¹¡£
lock¤Ë¼ºÇÔ¤¹¤ë¤ÈShadow::FileLock¤È¤¤¤¦Îã³°¤òȯÀ¸¤µ¤»¤Þ¤¹¡£
lock¤ò¥¤¥Æ¥ì¡¼¥¿¤È¤·¤Æ»È¤¦¤³¤È¤Ë¤è¤Ã¤Æ¡¢¥¤¥Æ¥ì¡¼¥¿¥Ö¥í¥Ã¥¯¤òÈ´¤±¤ë
¤È¤¤Ë¼«Æ°Åª¤Ëunlock¤ò¹Ô¤Ê¤¤¤Þ¤¹¡£
6. »²¹Í
* man shadow
* /usr/include/shadow.h
ttate@jaist.ac.jp
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