Using the --color
option works for me out when I run grep inside of shell scripts.
Here is an example of what you want.
grep -n --color=auto "PATTERN" FILE
The main problem is here:
read $input
In bash, usually, $foo
is the value of the variable foo
. Here, you don't want the value, but the name of the variable, so it should be just:
read input
Similarly, in the if
tests, $yes
and $no
should be just yes
and no
, since you just want the strings yes
and no
there.
You could use a case
statement here, which (IMHO) makes it easier to do multiple cases based on input:
case $input in
[Yy]es) # The first character can be Y or y, so both Yes and yes work
echo "Hello!"
echo "Hello!" | festival --tts
;;
[Nn]o) # no or No
echo "Are you sure?"
echo "Are you sure?" | festival --tts
;;
*) # Anything else
echo "Please answer yes or no."
echo "Please answer yes or no." | festival --tts
;;
esac
You could wrap the two echo
statements and the use of festival
in a function to avoid repeating yourself:
textAndSpeech ()
{
echo "$@"
echo "$@" | festival --tts
}
case $input in
[Yy]es) # The first character can be Y or y, so both Yes and yes work
textAndSpeech "Hello!"
;;
[Nn]o) # no or No
textAndSpeech "Are you sure?"
;;
*) # Anything else
textAndSpeech "Please answer yes or no."
;;
esac
With $input
, bash replaces this with its value, which is nothing initially, so the read
command run is:
read
And read
by default stores the input in the variable REPLY
. So you can, if you want, eliminate the input
variable altogether and use $REPLY
instead of $input
.
Also have a look at the select
statement in Bash.
Best Answer
Yes, there is Bash Debugger Project.
You can also use
set -x
andset -v
at execution. More info:http://www.linuxtopia.org/online_books/advanced_bash_scripting_guide/debugging.html http://www.cyberciti.biz/tips/debugging-shell-script.html
Good luck!