Re: Substring search in dash [ _NOT_ bash ] shell

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

Greg Wooledge wrote:
> https://lists.gnu.org/archive/html/bug-bash/2015-07/msg00125.html
which states

  $ test -n '<' -a true
  -bash: test: too many arguments

This looks rather like the effect of having an operator named '<':

  $ test 1 '<' 2 && echo yes
  yes
  $ test 3 '<' 2 && echo yes
  $ 

One gets the same problem with traditional operator '='

  $ test -n '=' -a 1 = 1 && echo yes
  bash: test: too many arguments

because the parser of "test" wants to be smart with this

  $ test -n '=' -a || echo no
  no
  $ test -n '=' && echo yes
  yes

The problem gets covered if only three arguments are given to "test"
or if the reserved operator name is not the second argument.

This is well an argument against attempts to be smart with "test",
i have to confess.


Have a nice day :)

Thomas