Using stderr and non-zero exit codes
Currently when there is some problem encountered, e.g. can't read parameters file, the programs writes some message with write(*,*)
, which ends up in stdout and exits with stop
.
Exiting the program with just stop
returns an exit code of zero, which basically signals that the program finished successfully so this should probably be changed to stop 1
or one could even define different error codes.
Similarly, it could make sense to write error messages to stderr. The Fortran2003 standard defines in the intrinsic module iso_fortran_env
variables to write to stdout and stderr with write(output_unit,...)
and write(error_unit,...)
.