To get notified when the authentication agent has been registered either listen to the Changed D-Bus signal or use --notify-fd to pass the number of a file descriptor that has been passed to the program. This file descriptor will then be closed when the authentication agent has been successfully registered.
If the authentication agent could not be registered, pkttyagent exits with an exit code of 127. Diagnostic messages are printed on standard error.
If one or more of the options passed are malformed, pkttyagent exits with an exit code of 126. If stdin is a tty, then this manual page is also shown.
Since process identifiers can be recycled, the caller should always use pid,pid-start-time when using the --process option. The value of pid-start-time can be determined by consulting e.g. the proc(5) file system depending on the operating system. If only pid is passed to the --process option, then pkttyagent will look up the start time itself but note that this may be racy.
Written by David Zeuthen <firstname.lastname@example.org> with a lot of help from many others.
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