of a program is to look for it just before it is used. The following function should be used at the beginning of a function that makes use of external programs.
mbfl_program_check prog... which we can declare the intention of a script to use a set of programs; a command line option is predefined to let the user test the availability of all the declared progr... _exit_program_not_found.
This function should be used to retrieve the pathname of the program to be used as first argument to mbfl_program_exec.
mb... ered for signum. This function is not meant to be used during normal scripts execution, but it may be useful to debug a script.
Manipulating strings
St
<code>if [ "$a" != "$b" ]</code>
This operator uses pattern matching within a [[ ... ]] construct.
... at the string be quoted within the test brackets. Using an unquoted string with ! -z, or even just the... g wax, not to mention cabbages and kings . . .
# Using if [ ... ]
# If a string has not been initi... t, but be empty: zmore "" arg2 arg3
then
echo "Usage: `basename $0` filename" >&2
# Error message
