A/UX® Programmer's Reference Sections

passwd(4) passwd(4)
a non-null string of characters from the above alphabet. (S uch a
string must be introduced in the first instance by the superuser.)
The first character of the age, M say, denotes the maximum
number of weeks for which a password is valid. A user who attempts
to login after his password has expired will be forced to
supply a new one. The next character, m say, denotes the
minimum period in weeks which must expire before the password
may be changed. The remaining characters define the week
(counted from the beginning of 1970) when the password was last
changed. (A null string is equivalent to zero.) M and m have numerical
values in the range (}-63 that correspond to the 64character
alphabet shown above (Le., / = 1 week; z = 63 weeks).
If m = M = 0 (derived from the string. or .. ) the user will be
forced to change his password the next time he logs in (and the
"age" will disappear from his entry in the password file). If m >
M (signified, e.g., by the string . /) only the superuser will be able
to change the password.
The passwd file can also have line beginning with a plus (+),
which means to incorporate entries from the yellow pages. There
are three styles of + entries: all by itself, + means to insert the entire
contents of the yellow pages password file at that point;
+name means to insert the entry (if any) for name from the yellow
pages at that point; +@name means to insert the entries for all
members of the network group name at that point If a + entry has
a nonnull password, directory, GeOS, or shell field, they will
overide what is contained in the yellow pages. The numeric user
ID and group ID fields cannot be overridden.
EXAMPLES
Here is a sample / etc/passwd file:
root:q.mJzTnu8icF.:O:10:God:/:/bin/csh
ja:6k/7KCFRPNVXg:508:10:Jerry Asher:/usr2/ja:/bin/csh
+melissa:
+@documentation:no-login:
+:: :Guest
In this example, there are specific entries for users root and ja,
in case the yellow pages are out of order. The user me 1 iss a will
have her password entry in the yellow pages incorporated without
change; anyone in the netgroup documentation will have their
password field disabled, and anyone else will be able to log in
with their usual password, shell, and home directory, but with a
GeOS field of Gue st.
February, 1990
Revision C
2