Re: LINENO is affected by where it is

[L A Walsh]

On 2021/09/01 02:36, David Collier wrote:
> Version:
>
>     GNU bash, version 5.0.3(1)-release (arm-unknown-linux-gnueabihf)
>
> Raspberry Pi using Raspbian.
>
> Installed from repo?
>
> LINENO goes backwards when run sync
>   
LINENO isn't the number of lines executed, but is the
linenumber in the source file it is running in (or the line
in a function for functions already in memory before you
access it.  Some examples:

Ishtar:/tmp/d> echoln() {
>  echo "LINENO=$LINENO"
>  }
Ishtar:/tmp/d> echoln
LINENO=1
Ishtar:/tmp/d> echoln
LINENO=1
Ishtar:/tmp/d> echo $LINENO
262
Ishtar:/tmp/d> saveln="val of lineno=$LINENO"
Ishtar:/tmp/d> echo run some stuff
run some stuff
Ishtar:/tmp/d> echo "lineno=$LINENO, not $saveln"
lineno=265, not val of lineno=263
----

> echo "================== At this point \$LINENO has correctly counted
---
LINENO doesn't "count", it is a passive 'count' of  where
you used the variable "LINENO" (based on some restrictions, like
resetting to 1 in functions).


Does that clarify anything?