Re: Name collision with nameref and local variable

[Chet Ramey]

On 10/16/20 11:23 AM, gri...@sun.stat.cwru.edu wrote:

> Bash Version: 5.0
> Patch Level: 18
> Release Status: release
> 
> Description:
> This worked just fine on Bash 4.2:
> 
> foo() {
> local -a args=("${!1}")
> echo "[IN] ${args[@]}"
> }
> 
> declare -a args=("$@")
> echo "Bash ${BASH_VERSION}"
> echo "[OUT] ${args[@]}"
> foo args[@]
> 
> eg.
> $ ./test.sh 1 2 3

Thanks for the report. There aren't any nameref variables there; this is
an order-of-evaluation problem resulting from the local array variable
declaration with the same name as the variable used in the word
expansion -- it doesn't depend on the indirect variable expansion. It was
fixed back in April, before bash-5.1-alpha was released.

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

Re: Bash Reference Mamual

[Craig H Maynard]

I get it now. Thanks for your friendly and informative replies. :)

Craig


> On Oct 17, 2020, at 7:45 PM, Lawrence Velázquez  wrote:
> 
>> On Oct 17, 2020, at 7:35 PM, Eduardo Bustamante  wrote:
>> 
>> <(cat file) and $(cat file) are not equivalent constructs. The former will
>> expand to a file name (e.g. "/dev/fd/63"), whereas the latter will expand
>> to the contents of the file.
> 
> If you want terms you can look up, $(cat file) and $(< file) are
> *command substitutions*, while <(cat file) is a *process substitution*.
> 
> $ printf 'FILE CONTENTS' >tmp
> $ printf '|%s|\n' "$(cat tmp)"
> |FILE CONTENTS|
> $ printf '|%s|\n' "$(< tmp)"
> |FILE CONTENTS|
> $ printf '|%s|\n' "<(cat tmp)"
> |<(cat tmp)|
> $ printf '|%s|\n' <(cat tmp)
> |/dev/fd/63|
> 
> 
> --
> vq

problem with using ctrl-x ctrl-e ( open vi editor )

[Hyunho Cho]

Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -g -O2
-fdebug-prefix-map=/build/bash-a6qmCk/bash-5.0=.
-fstack-protector-strong -Wformat -Werror=format-security -Wall
-Wno-parentheses -Wno-format-security
uname output: Linux EliteBook 5.4.0-42-generic #46-Ubuntu SMP Fri Jul
10 00:24:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 5.0
Patch Level: 17
Release Status: release

#

bash$ cat <<\EOF  # without using ctrl-x ctrl-e there is no problem
occurred.
> 111
> 222
> EOF
111
222

---

bash$ cat <<\EOF
> 111
>  < in this line open vi editor with ctrl-x ctrl-e
and add another 222 line then :wq


bash$ cat <<\EOF
> 111
>
cat <<\EOF
111
222
EOF
111< successfully executed cat command with heredoc
222
>
>
>
> ^C   < but does not end ">" prompt until enter ctrl-c