s will just print the error message. export foo="one" for i in foo bar baz; do eval echo \${$foo:?} one bash: bar: parameter null or not set bash: baz: p... ld cards with them -- since dirname takes exactly one argument (and complains if given more) and basename takes one argument and an optional one which is not a filen... umber of arguments is different from the required one: prints an error message and returns with code one; else returns with code zero.
mbfl_argv_from... inting messages to the console
This module allows one to print messages on an output channel. Various f
ing with ! -z, or even just the unquoted string alone within test brackets (see Example 7-6) normally w... # This works fine.
# The [ ... ] test operator alone detects whether the string is null.
# However it ... Chazelas points out,
# if [ $string1 ] has one argument, "]"
# if [ "$string1" ] has two arg
