1FUD(8)                            Cyrus IMAP                            FUD(8)
2
3
4

NAME

6       fud - Cyrus IMAP documentation
7
8       Provide information about user mailboxes
9

SYNOPSIS

11       fud [ -C config-file ] [ -U uses ] [ -T timeout ] [ -D ]
12

DESCRIPTION

14       fud  is  a long lived datagram daemon started from master that provides
15       information about when a user last read their mail, when mail last  ar‐
16       rived  in  a  user’s mailbox, and how many messages are recent for that
17       user.
18
19       fud reads its configuration options out of the imapd.conf(5)  file  un‐
20       less specified otherwise by -C.
21
22       fud  will automatically proxy any and all FUD requests to the appropri‐
23       ate backend server if it is running on a Cyrus Murder frontend machine.
24
25       To set up the FUD daemon, add this to your cyrus.conf:
26
27       fud           cmd="fud" listen="fud" prefork=1 proto="udp"
28
29       and to /etc/services:
30
31       fud             4201/udp                        # Cyrus IMAP FUD Daemon
32
33   Client
34       There is no specific FUD client. This shows how one might access FUD.
35
36       #!/usr/bin/perl
37
38       use Socket;
39
40       print( "Enter fud hostname: " );
41       $hostname = <>;
42       chomp( $hostname );
43
44       print( "Enter username to query: " );
45       $username = <>;
46       chomp( $username );
47
48       socket( FUD, PF_INET, SOCK_DGRAM, getprotobyname( "udp" ) )
49          or die( "failed to create udp socket: $!" );
50
51       $ipaddr = inet_aton( $hostname );
52       $portaddr = sockaddr_in( '4201', $ipaddr );
53
54       $fud_query = $username . '|user.' . $username;
55
56       send( FUD, "$fud_query", 0, $portaddr ) == length( $fud_query )
57          or die( "failed to send fud query: $!" );
58
59       recv( FUD, $fud_response, 512, 0 )
60          or die( "recv() failed: $!" );
61
62       print( "FUD responded: $fud_response\n" );
63
64       exit( 0 );
65

OPTIONS

67       -C config-file
68              Use the specified configuration file config-file rather than the
69              default imapd.conf(5).
70
71       -U uses
72              The  maximum number of times that the process should be used for
73              new connections before shutting down.  The default is 250.
74
75       -T timeout
76              The number of seconds that the process will wait for a new  con‐
77              nection  before  shutting  down.   Note that a value of 0 (zero)
78              will disable the timeout.  The default is 60.
79
80       -D     Run external debugger specified in debug_command.
81

FILES

83       /etc/imapd.conf, /etc/cyrus.conf
84

BUGS

86       Though not really a bug, fud will silently ignore any requests that  it
87       does not consider valid.
88
89       Also  not  really a bug, fud requires that the anonymous user has the 0
90       (zero) right on the mailbox in question.  This is only a “bug”  because
91       0 is not a standard IMAP ACL bit.
92
93       fud  is an experimental interface meant to provide information to build
94       a finger-like service around.  Eventually it should be superseded by  a
95       more standards-based protocol.
96

SEE ALSO

98       imapd.conf(5), cyrus.conf(5)
99

AUTHOR

101       The Cyrus Team, Nic Bernstein (Onlight)
102

104       1993–2022, The Cyrus Team
105
106
107
108
1093.6.0                          December 12, 2022                        FUD(8)
Impressum