bash: How to echo plenty of ' and " chars ?

frenchn00b · 05-06-2008, 03:48 PM

Hello,

Sorry for the ultra n00b question, even if already programing.
I would like just to have a script that put that content into .festivalrc:

Code:

(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)

Hence, the script would be :

myscript.sh

Code:

#!/bin/sh
echo "(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")" > ~/.festivalrc
echo "(Parameter.set 'Audio_Method 'Audio_Command)" >> ~/.festivalrc

but this code of course do not work

thank you
(and sorry for the n00b question again)

rocket357 · 05-06-2008, 03:52 PM

Escape the quotes. For instance:

echo "This is a \"test\" using different 'kinds' of \"quotes\""

will output:

This is a "test" using different 'kinds' of "quotes"

So you'd need this:

#!/bin/sh
echo "(Parameter.set 'Audio_Command \"aplay -q -c 1 -t raw -f s16 -r $SR $FILE\")" > ~/.festivalrc
echo "(Parameter.set 'Audio_Method 'Audio_Command)" >> ~/.festivalrc

frenchn00b · 05-06-2008, 03:56 PM

Quote:

Originally Posted by rocket357

Escape the quotes. For instance:

echo "This is a \"test\" using different 'kinds' of \"quotes\""

will output:

This is a "test" using different 'kinds' of "quotes"

Ahh and can you do this \' \' ?
since you can do :
echo '" this is a text "'
...

rocket357 · 05-06-2008, 04:00 PM

Umm, yeah, but you wouldn't require \' since you're main quote is using double quotes.

You could look at it like this:

echo 'This is a \'single\' quoted line. I shouldn\'t have to escape "double quotes" '

echo "This is a \"double\" quoted line. I shouldn't have to escape 'single quotes' "

radoulov · 05-06-2008, 05:07 PM

Code:

cat <<! >~/.festivalrc
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)
!

or (if you don't want to expand SR and FILE):

Code:

cat <<\! >~/.festivalrc
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)
!

frenchn00b · 12-28-2008, 12:47 PM

Quote:

Originally Posted by radoulov

Code:

cat <<! >~/.festivalrc
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)
!

or (if you don't want to expand SR and FILE):

Code:

cat <<\! >~/.festivalrc
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)
!

I put that in a script and it says taht " is somehow missing or end of file

nota: \ added to preserve "$"

Code:

 	cat <<! >~/.festivalrc
	(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r \$SR \$FILE")
	(Parameter.set 'Audio_Method 'Audio_Command)
	!

radoulov · 12-28-2008, 02:33 PM

What is the exact command you're running?
Here I'm using bash:

Code:

$ cat <<\! >~/.festivalrc
> (Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
> (Parameter.set 'Audio_Method 'Audio_Command)
> !
$ cat .festivalrc 
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)

Notice that some shells will require double \\ to quote the heredoc if you use ! as a delimiting identifier.

frenchn00b · 12-29-2008, 02:40 AM

Quote:

Originally Posted by radoulov

What is the exact command you're running?
Here I'm using bash:

Code:

$ cat <<\! >~/.festivalrc
> (Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
> (Parameter.set 'Audio_Method 'Audio_Command)
> !
$ cat .festivalrc 
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)

Notice that some shells will require double \\ to quote the heredoc if you use ! as a delimiting identifier.

Actually I have to put the commands in a bash script, that willl be run afterwards with ./script or sh script, and will generate that .festivalrc file.

radoulov · 12-29-2008, 02:50 AM

Quote:

Originally Posted by frenchn00b

Actually I have to put the commands in a bash script, that willl be run afterwards with ./script or sh script, and will generate that .festivalrc file.

This is how I'm running it from a script:

Code:

$ ./s
generating /home/sysadmin/.festivalrc ... done
displaying the content of /home/sysadmin/.festivalrc

(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)

And this is the script:

Code:

#! /bin/bash

rcfile="$HOME/.festivalrc"

printf 'generating %s ... ' "$rcfile"

cat <<\! >"$rcfile"
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")
(Parameter.set 'Audio_Method 'Audio_Command)
!

printf 'done\n'

printf 'displaying the content of %s\n\n' "$rcfile"

cat "$rcfile"