By default, FWEB is relatively verbose; as it proceeds, it prints messages about what files it is reading and writing, numbers of the starred sections, line numbers, etc. However, different levels of verbosity can be set by the command ‘-Mlevel’, where the level may be 0 (least verbose) through 4 (most verbose; the default), as described in the following table:
- 0
Like level 1, but the start-up banner is not printed. If FWEB runs to completion with no errors, nothing at all will be printed.
- 1
Print only error messages.
- 2
Print error and warning messages.
- 3
Print errors, warnings, and short information messages (excluding starred section numbers and line numbers).
- 4
Print everything.
The start-up banner, which includes the version number, is printed for all message levels except 0. For level 0, one can use the ‘-V’ option to request the start-up banner. See -V_.
This option is very recent, and may not be fully debugged for obscure combinations of command-line options. Please report any annoyances.
Another way of discriminating message types is via color output. See Color.