mtstailor(5mh)
Name
mtstailor − system customization for MH message system
Description
The file /usr/lib/mh/mtstailor defines run-time options for those MH programs which interact (in some form) with the message transport system. At present, these (user) programs are: ap, conflict, inc, msgchk, msh, post, rcvdist, and rcvpack.
The options available along with default values and a description of their meanings are listed below:
localname:
The host name that MH considers local. If not set, depending on the version of ULTRIX you are running, MH will query the system for this value (for example: <whoami.h>, gethostname). This has no equivalent in the MH configuration file.
systemname:
The name of the local host in the UUCP “domain”. If not set, depending on the version of ULTRIX you are running, MH will query the system for this value. This has no equivalent in the MH configuration file.
servers:
A host or list of hosts running sendmail can be specified. When an MH program is run, it uses this entry to search for a central sendmail to connect to. This is particularly useful for workstation users who may not have sendmail running on their workstation.
mmdfldir: /usr/spool/mail
The directory where maildrops are kept. If this is empty, the user’s home directory is used. This overrides the mail field in the MH configuration file.
mmdflfil:
The name of the maildrop file in the directory where maildrops are kept. If this is empty, the user’s login name is used. This overrides the mail field in the MH configuration file.
mmdelim1: \001\001\001\001\n
The beginning-of-message delimiter for maildrops.
mmdelim2: \001\001\001\001\n
The end-of-message delimiter for maildrops.
mmailid:0
If non-zero, then support for MMailids in /etc/passwd is enabled. Basically, the pw_gecos field in the password file is of the form
My Full Name <mailid>
The MH internal routines that deal with user and full names will return mailid and My Full Name respectively.
lockstyle: 0
The locking discipline to perform. A value of 0 means to use flock if available, standard BellMail locking otherwise. A value of 1 means to use BellMail locking always (the name of the lock is based on the file name). A value of 2 means to use MMDF locking always (the name of the lock is based on device/inode pairs).
lockldir:
The name of the directory for making locks. If your system does not have the flock syscall, then this directory is used when creating locks. If the value is empty, then the directory of the file to be locked is used.
sendmail: /usr/lib/sendmail
The pathname to the sendmail program.
maildelivery: /usr/lib/mh/maildelivery
The name of the system-wide default .maildelivery file. See slocal() for the details.
everyone: 200
The highest user-id which should NOT receive mail addressed to everyone.
noshell: path
If set, then each user-id greater than everyone that has a login shell equivalent to the given value (for example, /bin/csh) indicates that mail for everyone should not be sent to them. This is useful for handling admin, dummy, and guest logins.
A few words on locking: MH has a flexible locking system for making locks on files. There are two mtstailor variables you should be aware of: lockstyle and lockldir. The first controls the method of locking: the second says where lock files should be created.
The lockstyle variable can take on three values: 0, 1, 2. A value of 0 means use the flock syscall if you are running on 4.2BSD, otherwise use a locking style of 1. A value of 1 or 2 specifies that a file should be created whose existence means locked and whose non-existence means unlocked. A value of 1 specified that the lockname is constructed by appending .lock to the name of the file being locked.
A value of 2 says to construct the lockname by looking at the device and inode numbers of the file being locked. If the lockldir variable is not specified, lock files will be created in the directory where the file being locked resides. Otherwise, lock files will be created in the directory specified by lockldir. Prior to installing MH, you should see how locking is done at your site, and set the appropriate values.
Files
/usr/lib/mh/mtstailor
System customization file.
/etc/passwd
System password file.