sact (“Show Editing Activity”) command provides
a summary of which files are currently checked out for editing.
For each checked-out file, a summary line is given. This line is of
the form ‘old-SID new-SID user date time’.
deltawhen the working file is checked in again.
No output is produced for sccs files that are not currently locked for editing. If a directory is specified on the command line, the whole directory is examined. Directory hierarchies are not descended beyond this one level. If ‘-’ is given as an argument, filenames are read from standard input.
Note that times in sccs files (and lock-files) are stored as local time, so if you are collaborating with developers in another time zone, the date shown will be in their local time for files that they are editing.