The database server utilities such as onstat and onmode attach to shared memory through the $INFORMIXDIR/etc/.infos.servername file.
The variable servername is the value of the DBSERVERNAME parameter in the ONCONFIG file. The utilities obtain the servername portion of the filename from the INFORMIXSERVER environment variable.
The oninit process reads the ONCONFIG file and creates the file .infos.servername when it starts the database server. The file is removed when the database server terminates.
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