3 qmail-popup \- read a POP username and password
10 reads a POP username and password from the network.
15 is most commonly invoked from
20 qmail-popup CHANGEME checkpassword qmail-pop3d Maildir
25 replaced by the fully qualified domain name of the local host.
28 expects descriptor 0 to read from the network
29 and descriptor 1 to write to the network.
30 It reads a username and password from descriptor 0
31 in POP's USER-PASS style or APOP style.
34 with the same descriptors 0 and 1;
35 descriptor 2 writing to the network;
36 and descriptor 3 reading the username, a 0 byte, the password,
38 an APOP timestamp derived from
45 It prints an error message if
47 crashes or exits nonzero.
50 should be used only within
52 Otherwise an eavesdropper can steal passwords.
54 an active attacker can still take over the connection
58 has a 20-minute idle timeout.
61 is based on a program contributed by Russ Nelson.