If you are interested in very verbose debugging helpwhen porting ecu or diagnosing a problem with line selection,locking, utmp or ecuungetty, try compiling with	-DECUUNGETTY_DEBUG -DECUUNGETTY_CHOWN -DSHARE_DEBUG -DCHOOSE_DEBUGThe majority of the logic tested by this debug suite currentlyworks only on SCO UNIX 3.2.0->3.2v2 and most SCO XENIX.The log file for a simple session appears below.05-10-1992-08:48-26728-hdb_choose_Any baud=9600 current line=''05-10-1992-08:48-26728-must pick new line utmpst=0 lerr=005-10-1992-08:48-26728-getdvbaud looking for 9600 baud05-10-1992-08:48-26728-getdvbaud returning tty2b05-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=0 errno=205-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=0 errno=205-10-1992-08:48-26728-UTMP uugetty:u2B:tty2B:26692:10105-10-1992-08:48-26728-CHOOSEANY chose tty2b05-10-1992-08:48-26728-copy_pde trial=0 Lline='/dev/tty2b' pdetty='2b'05-10-1992-08:48-26728-choose_tty_for_pde '2b' 960005-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=0 errno=205-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=0 errno=205-10-1992-08:48-26728-UTMP uugetty:u2B:tty2B:26692:101ECUUNGET-26728-(26739) ISLOCK /usr/spool/uucp/LCK..tty2b status=0 errno=2ECUUNGET-26728-(26739) ISLOCK /usr/spool/uucp/LCK..tty2b status=0 errno=2ECUUNGET-26728-(26739) UTMP uugetty:u2B:tty2B:26692ECUUNGET-26728-(26739) -g utmp status=101ECUUNGET-26728-(26739) /dev/tty2b b000021382a exit code 105-10-1992-08:48-26728-UNGETTY acquired /dev/tty2b05-10-1992-08:48-26728-UTMPCHK /dev/tty2b st=0 ut=10105-10-1992-08:48-26728-CRLOCK /usr/spool/uucp/LCK..tty2b status=0 errno=Error 005-10-1992-08:48-26728-LOCKTTY /dev/tty2b status 0 errno=Error 005-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=-11 errno=005-10-1992-08:48-26728-UTMP uugetty:u2B:tty2B:26692:10405-10-1992-08:48-26728-UTMPCHK /dev/tty2b st=-11 ut=10405-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=-11 errno=005-10-1992-08:48-26728-lclose Liofd=-1 Lline=/dev/tty2b line_lock_status=-1105-10-1992-08:48-26728-choose_tty_for_pde rtn=1 line='/dev/tty2b' errmsg='' itmp=-1105-10-1992-08:48-26728-copy_pde 2  Lline='/dev/tty2b' reopen=105-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=-11 errno=005-10-1992-08:48-26728-lopen Liofd=-1 Lline=/dev/tty2b line_lock_status=-1105-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=-11 errno=005-10-1992-08:48-26728-UTMP uugetty:u2B:tty2B:26692:10405-10-1992-08:48-26728-UTMPCHK /dev/tty2b st=-11 ut=10405-10-1992-08:48-26728-LOCKTTY /dev/tty2b status 0 errno=Permission denied05-10-1992-08:48-26728-getdvline looking for tty2b05-10-1992-08:48-26728-getdvline tty2b found05-10-1992-08:48-26728-UUCPDIAL /usr/lib/uucp/dialgT2500 4269068P exit status0x820005-10-1992-08:48-26728-ISLOCK /usr/spool/uucp/LCK..tty2b status=-11 errno=005-10-1992-08:48-26728-lclose Liofd=3 Lline=/dev/tty2b line_lock_status=-11ECUUNGET-26728-(26742) ISLOCK /usr/spool/uucp/LCK..tty2b status=-11 errno=0ECUUNGET-26728-(26742) UTMP uugetty:u2B:tty2B:26692ECUUNGET-26728-(26742) -t utmp status=104ECUUNGET-26728-(26742) -t /dev/tty2b b000021382a exit code 105-10-1992-08:48-26728-UNGETTY -t /dev/tty2b status 0100ECUUNGET-26728-(26743) ISLOCK /usr/spool/uucp/LCK..tty2b status=-11 errno=0ECUUNGET-26728-(26743) UTMP uugetty:u2B:tty2B:26692ECUUNGET-26728-(26743) -r utmp status=104ECUUNGET-26728-(26743) -r /dev/tty2b b000021382a exit code 005-10-1992-08:48-26728-UNGETTY returned /dev/tty2b