s6-networking
Software
skarnet.org

The minidentd program

minidentd is a small UCSPI server application that answers IDENT requests.

Interface

     minidentd [ -v ] [ -n | -i | -r ] [ -y file ] [ -t timeout ]

minidentd reads a series of IDENT requests on stdin and answers them on stdout. It logs what it's doing on stderr. The environment variables xLOCALIP and xREMOTEIP, where x is the value of the PROTO environment variable, must contain the IDENT server address and the IDENT client address, respectively.

minidentd exits 0 on success, 100 on a usage error and 111 on a system call failure.

minidentd does not contact the network directly. It's meant to run under a super-server like s6-tcpserver. minidentd will work with IPv4 as well as IPv6.

Options

• -v : verbose mode. Log queries and replies.
• -n : send ERROR : HIDDEN-USER replies if the user has a .ident file in their home directory.
• -i : user-defined answers. The first 14 chars of the user's .ident file, up to EOF or newline, are used instead of the user name. If the file exists and is empty, send ERROR : HIDDEN-USER. If it doesn't exist, send a normal reply.
• -r : send random replies.
• -y file : valid with -n or -i. Use file instead of .ident.
• -t timeout : close connection after timeout milliseconds without a client request.

Notes

• minidentd works only under Linux (2.2 or later); on other systems, it will compile and run, but report an error for every request. The problem is that there is no portable Unix way of listing active outgoing TCP connections with the relevant uids. On Linux, minidentd parses the /proc/net/tcp or /proc/net/tcp6 virtual file. Other systems have their own way of doing this, if you want your system to be supported by minidentd, please contact the author.