Re: BASH_ARGC and BASH_ARGV are empty

[Chet Ramey]

nsushkin@openfinance.com wrote:
> Configuration Information [Automatically generated, do not change]:
> Machine: i386
> OS: linux-gnu
> Compiler: i386-redhat-linux-gcc
> Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i386' 
> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i386-redhat-linux-gnu' 
> -DCONF_VENDOR='redhat' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
> -DHAVE_CONFIG_H  -I.  -I. -I./include -I./lib  -D_FILE_OFFSET_BITS=64 -O2 -g 
> -pipe -m32 -march=i386 -mtune=pentium4
> uname output: Linux nypagt01.openfinance.com 2.6.9-1.667smp #1 SMP Tue Nov 2 
> 14:59:52 EST 2004 i686 i686 i386 GNU/Linux
> Machine Type: i386-redhat-linux-gnu
>
> Bash Version: 3.0
> Patch Level: 14
> Release Status: release
>
> Description:
> I am trying to get the values of BASH_ARGC and BASH_ARGV, but they
> seem to be empty? Is it a bug, feature, my misunderstanding, or a 
> configuration issue.
>
> Repeat-By:
> Run the following script:
>
> ---------------CUT HERE----------------
> function a
> {
>     echo "a args: $@"
>     b calling function b
> }
> function b
> {
>     echo "b args: $@"
>     set|grep ARG;
> #    for ((i=0 ; $i < ${#FUNCNAME[@]} ; i++))
> #    do
> #        printf "%s[%s](" "${FUNCNAME[$i]}" "${BASH_ARGC[$i]}";
> #        printf "%s)\n" "${BASH_ARGV[*]}";
> #    done
> }
>
> a calling function a
> ---------------CUT HERE----------------
>
> And the output I get is
>
> BASH_ARGC=()
> BASH_ARGV=()
>     set | grep ARG
>
>
> Shouldn't BASH_ARGC be something like ([0]=>3, [1]=>3)
> and BASH_ARGV contain words "calling function b calling function a"?
> FUNCNAME correctly returns "b a"

BASH_ARGC and BASH_ARGV are set only in `extended debug' mode;
enabled with `shopt -s extdebug'.  I will correct the omission
in the manual.

Chet

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet )
                                                Live...Laugh...Love
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/