Re: How to display parameters in a function backtrace?

[Chet Ramey]

On 2/2/22 9:00 AM, L A Walsh wrote:
> I was trying to find parameters to a function that gave an error, so
> I 'turned on' (included my backtracing routine), which showed:
> 
> ./24bc: line 46: printf: `txt=\nRed,': not a valid identifier
> STOPPING execution @ "printf ${_:+-v $_} '\x1b[48;2;%s;%s;%sm' $1 $2 $3" in
> "setBgColor()" at ./24bc #46
>  called in setBackBlack() at ./24bc #56
>  called in title() at ./24bc #74
>  called in main() at ./24bc #81
> 
> ----
> I was all, 'rats, its not showing the params', I wondered why and looked at
> the code,
> and realized that while I can backtrace function, source line+file, I didn't
> know how to display the params that were used when the function was called.

Look at BASH_ARGC and BASH_ARGV and how the debugger uses them.


-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/