In message 20050822125758.00001da8@idefix you wrote:
can anyone confirm that this is a bug in the hush shell: both
test -n "$foo" && echo yes
I cannot confirm this. The only part of hush which is involved here is the && processing which works fine for me..
"test" is NOT a hush builtin.
For example all I get is:
=> test -n "$foo" && echo yes Unknown command 'test' - try 'help'
result in nothing echoed if foo is not defined. If, on the other hand, foo is defined to a string containing blanks, both commands will echo yes.
Is there another way to check the existence of a variable?
Sure:
TRAB # foo= TRAB # test -n "$foo" && echo yes TRAB # test -n "$foo" || echo no no TRAB # test "$foo" && echo yes TRAB # test "$foo" || echo no no TRAB # foo=dummy TRAB # test -n "$foo" && echo yes yes TRAB # test -n "$foo" || echo no TRAB # test "$foo" && echo yes TRAB # test "$foo" || echo no no
THe only problem I see is with "test -z":
TRAB # foo= TRAB # test -z "$foo" && echo yes TRAB # test -z "$foo" || echo no no but TRAB # test -z "" && echo yes yes TRAB # test -z "" || echo no TRAB #
Patches welcome.
Best regards,
Wolfgang Denk