Bug Report

[Kjetil Torgrim Homme]

On 04/07/2020 01.09, Vasile Martiniuc wrote:
> Good afternoon,
> 
> This line is wrong:
> pass="$($GPG -d "${GPG_OPTS[@]}" "$passfile" | tail -n
> +${selected_line} | head -n 1)" || exit $?
> 
> "head -n 1" (or "head -1") exits immediately after reading the first
> line. And the "tail" is still writing to the pipe, but there is no
> reader because "head" has exited.
> It send SIGPIPE from the kernel and it exits with the status code 141.

why is this wrong?  the exit status of a pipeline is *just* the last 
command, and "head -n 1" exits successfully.

another example:

  : [kjetilho at ranger ~]; echo foo | false | head -1
  : [kjetilho at ranger ~]; echo ${PIPESTATUS[*]}, $?
  141 1 0, 0

> You should not use "|| exit". The "${PIPESTATUS[@]}" is "0 141 0" and
> the password is not copied to the clipboard if there are more than one
> line.
> I can't copy passwords if there are more lines (10, 20, 30...).
> 

you must be doing something different.  have you turned on SIGPIPE 
delivering signals?  SIGPIPE should be ignored in most circumstances.

-- 
Kjetil T. Homme
Redpill Linpro - Changing the Game