_exits.txt

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.*s 1 "Exit Codes"

When ECU exits (terminates execution),
it uses a code from the following table:
.DS L
OK                   0    no error
SIG1                 1    SIGHUP (signal 1)
SIGN                 64   signal 64 - see below
LINE_READ_ERROR      129  could not read from attached line
XMTR_WRITE_ERROR     130  could not write to attached line
XMTR_LOGIC_ERROR     131  software logic error
BSD4_IOCTL           132  not currently used
SHM_ABL              133  not currently used
SHM_RTL              134  not currently used
NO_FORK_FOR_RCVR     135  could not fork receiver process
TTYIN_READ_ERROR     136  could not read from console
LINE_OPEN_ERROR      137  could not attach (open) requested line
PWENT_ERROR          138  error in /etc/passwd processing
USAGE                139  command line syntax error
CONFIG_ERROR         140  missing or erroroenous configuration file
CURSES_ERROR         141  error in curses use
RCVR_FATAL_ERROR     142  receiver died unexpectedly
MALLOC               143  critical memory allocation failure
LOGIC_ERROR          144  internal logic error
GEOMETRY             145  unsupported screen geometry
INIT_PROC_ERROR      192  initial procedure terminated in error
USER1                193  exit procedure command called with 1
USERN                223  exit procedure command called with 31
.DE

The logical names 'SIG1' and 'SIGN' refer to a range of error codes
signifying ecu termination due to a signal.  A larger range (64) is
reserved than is necessary to handle reasonable expansion of
SIG values in the OS. Not all signals will be reported
in this manner. ECU will never report status 9 (signal 9, SIGKILL),
for instance.

The logical names 'USER1' and 'USERN' refer to a range of error
exits codes reserved for use by the 'exit' procedure command.
See the description of this command for more information.

For ecu friend code,
formal C #define identifiers for exit codes may be found in
termecu.h and consist of the above logical names prefixed with 'TERMECU_'.