Re: Maybe a mistake

[Harald van Dijk <harald@gigawatt.nl>]

On 17/04/2020 17:37, lunkov@gmail.com wrote:
> Hello! I encountered a script execution error using dash. Other shells
> execute this script without error. Perhaps there is an error in dash.
> Please execute my script in dash and in bash, for example.
> -------------------------------------------------------------------------------------------------
[...]
>          local F=`echo "${i}" | grep "${PATTERN}"`        # local

Hi,

The latest release version of dash does not support assignment syntax in 
command arguments. Assignment syntax is special in that it prevents 
field splitting. A shorter example is

   x="1 y=2"
   export x=$x
   echo y=$y

This prints y=2 in the latest release version, but prints y= in other 
shells (unless you had previously set y yourself): without special 
assignment syntax, x=$x is split into x=1 and y=2 before it is passed to 
the export command, but with special assignment syntax x=$x is preserved 
as a single word.

You can work around this by adding quoting:

   local F="`...`"

The current git version of dash does support assignment syntax in 
command arguments (like other shells, only for specific commands) and 
accepts your script without modifications.

Cheers,
Harald van Dijk