ttymap(1M) — DG/UX R4.11



ttymap(1M)                       DG/UX R4.11                      ttymap(1M)


NAME
       ttymap - install and update /etc/ttymap based on /dev and
       /etc/ttysrch

SYNOPSIS
       /usr/sbin/ttymap

DESCRIPTION
       The ttymap command creates and updates /etc/ttymap with information
       from the /dev directory tree and the /etc/ttysrch file.

       The ttymap command is run during system initialization to create the
       /etc/ttymap file.  The /etc/ttymap file is used by the ttyname
       library function to search for terminal and terminal-related device
       files.  The command populates /etc/ttymap with a list of device files
       indexed by device ID and file system ID, and with a time-stamped map
       of directories within /dev.

       The ttyname(3C) library function attempts to find devices by lookup
       based on device number and file system ID.  If a candidate with
       matching device and file system IDs is found, ttyname checks its
       inode number.  If no match is found, ttyname checks each directory in
       the map to see if it is newer than the time stamp in the /etc/ttymap
       file.  If a newer directory is found, ttyname searches the directory
       for device files and recursively searches any newer subdirectories.

       The /etc/ttysrch file can be used to specify directories that should
       be ignored, which decreases the size of the /etc/ttymap file,
       providing faster lookup, and to specify directories that contain
       clone devices, which allows ttyname to accept device files that do
       not match on inode number.

FILES
       /etc/ttysrch
       /etc/ttymap
       /dev/*

REFERENCES
       ttyname(3C), ttysrch(4)

DIAGNOSTICS
       ttymap returns 0 on success or 1 on error.


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