checkapoppw - checks APOP password against the file
~Maildir/.password
SYNOPSIS
checkapoppw prog
DESCRIPTION
checkapoppw reads descriptor 3 through end of file
and then closes descriptor 3.
There must be at most 512 bytes of data before end of file.
The information supplied on descriptor 3
is a login name terminated by \0,
a password terminated by \0,
a timestamp terminated by \0,
and possibly more data.
There are no other restrictions
on the form of the login name, password, and timestamp.
If the password is unacceptable,
checkapoppw exits 1.
If
checkapoppw is misused, it may instead exit 2.
If there is a temporary problem checking the password,
checkapoppw exits 111.
If the password is acceptable,
checkapoppw runs
prog . prog consists of one or more arguments.
Compatible tools
There are other tools that offer the same interface as
checkapoppw
Note that these tools do not follow the
getopt interface.
Optional features are controlled through
(1) the tool name and(2) environment variables.
The password database
checkapoppw checks the APOP password
against the content of the file
Maildir/.password (not encrypted)
in the user's home directory corresponding to the login name.
Process-state changes
Before invoking
prog , checkapoppw sets up
$USER , $HOME , $SHELL , its supplementary groups,
its gid,
its uid,
and its working directory.
