isql-fb does not create persistent history file
-----------------------------------------------

                 Key: CORE-5711
                 URL: http://tracker.firebirdsql.org/browse/CORE-5711
             Project: Firebird Core
          Issue Type: Bug
          Components: ISQL
    Affects Versions: 2.5.7
         Environment: FreeBSD 11.1-RELEASE - various platforms
            Reporter: Greg Cunningham


By default, my isql-fb (FreeBSD) doesn't save a history file.  I started using 
FB over a decade ago & have never seen persistent history in isql, so I assumed 
that it's not a feature. 

 Today, I found that there is a function in isql.cpp viz:
 ...
 // Save SQL command (not isql's own commands) to a history file only if we
 // are in interactive mode.
 "void InputDevices::saveCommand(const char* statement, const char* term)" 
{
        if (m_ifp.indev_fpointer == stdin)
        {
                FILE* f = m_ofp.indev_fpointer;
                if (f)
                {
                        fputs(statement, f);
                        fputs(term, f);
                        // Add newline to make the file more readable.
                        fputc('\n', f);
                }
                else
                {
                        Command* command = new Command(statement, term);
                        commands.add(command);
                }
        }
}
...


I have not been able to determine how the file handle m_ofp.indev_fpointer gets 
initialized,  Presumably it is meant to already have opened the history file.  
Maybe there is code missing for this.

FWIW, MS Windows users have ' IDS_DEF_HIST_FILE, "Unable to create default 
command history file %s"' (isql.rc) as a possible error.
Now, it looks suspiciously like there is intent in isql-fb to manage persistent 
command history that doesn't work. 


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