Ask whether to retry instead of always retrying, so users can escape
if there is a problem setting the date instead of being forced to enter
values until it works.
Ask to press Enter instead of "any key". "Any key" prompts are
generally misleading, because there are usually keys that won't
actually work (e.g. Ctrl, Caps Lock, Shift).
Loop to retry if setting the date fails instead of recursing.
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
There's little value to offering the minimum field value as a default
IMO:
* it's rarely accurate (e.g. minute 00 is only accuate 1/60 of the time)
* it's very obvious to just press '0'<enter> instead (and no longer
needs to be '00')
* it eliminates a lot of wordiness you otherwise have to read (or more
likely, ignore)
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
There's no need to try to parse stdout/stderr to figure out if date
succeeded, just check if it was successful directly.
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
Allow Backspace in input. It's really frustrating otherwise if a typo
cannot be corrected, and worse, the backspace key actually produces a
character that becomes part of the input.
Complete input with Enter. It is surprising when the script just
moves on right away once a fourth/second digit is entered, and worse,
users expecting to press Enter could reasonably press it before
realizing the script did not require it, which then skips the _next_
prompt inadvertently. Users with imperfect typing might double a
digit unintentionally, do not force them to proceed with an incorrect
value.
Removing '-n $digits' from read does both of those. Add '-r' so
backslashes do not have unexpected behavior.
Don't require leading zeroes, zero-pad automatically.
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
Use local named variables instead of $1-$4 throughout the function.
This makes the implementation clearer and documents the usage.
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
