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Old 11-14-2008, 10:58 AM   #1
Dr_Death_UAE
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using special symbols in bash script


Hello, i was wondering how to handle special symbols with bash scripting.

like:
"! # $ % & ' ( ) * + , - . / : ; & < = > ? @ [ \ ] ^ _ { | } ~"

they give me error if i use them as variable.

any idea
 
Old 11-14-2008, 11:10 AM   #2
trickykid
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You'll usually have to escape them with the \ character.
 
Old 11-14-2008, 11:14 AM   #3
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you mean to add slash \ after each symbol ?

for example if i want to use them in variable:

symbols="!\ #\ $\ %\ &\ '\ (\ )\ *\ +\ ,\ -\ .\ /\ :\ ;\ &\ <\ =\ >\ ?\ @\ [\ \\ ]\ ^\ _\ {\ |\ }\ ~\"


it wont work!

Last edited by Dr_Death_UAE; 11-14-2008 at 11:19 AM.
 
Old 11-14-2008, 11:19 AM   #4
trickykid
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Quote:
Originally Posted by Dr_Death_UAE View Post
you mean to add slash \ after each symbol ?
Yes.

So you want to display the $ symbol, you'd put \$ in you're script, etc.
 
Old 11-14-2008, 11:21 AM   #5
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The "\" goes before the special character, not after.
 
Old 11-14-2008, 11:23 AM   #6
colucix
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Quote:
Originally Posted by Dr_Death_UAE View Post
symbols="!\ #\ $\ %\ &\ '\ (\ )\ *\ +\ ,\ -\ .\ /\ :\ ;\ &\ <\ =\ >\ ?\ @\ [\ \\ ]\ ^\ _\ {\ |\ }\ ~\"
You have to put the escape character before, not after.
Code:
$ echo \! \# \$ \% \& \' \( \) \* \+ \, \- \. \/ \: \; \< \= \< \? \@ \[ \\ \] \^ \_ \{ \| \} \~
! # $ % & ' ( ) * + , - . / : ; < = < ? @ [ \ ] ^ _ { | } ~
 
Old 11-14-2008, 11:28 AM   #7
Dr_Death_UAE
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symbols="\! \# \$ \% \& \' \( \) \* \+ \, \- \. \/ \: \; \& \< \= \> \? \@ \[ \\ \] \^ \_ \{ \| \} \~"

gave me syntax error: unexpected end of file
 
Old 11-14-2008, 11:31 AM   #8
trickykid
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Quote:
Originally Posted by Dr_Death_UAE View Post
symbols="\! \# \$ \% \& \' \( \) \* \+ \, \- \. \/ \: \; \& \< \= \> \? \@ \[ \\ \] \^ \_ \{ \| \} \~"

gave me syntax error: unexpected end of file
Well that tells us nothing. What are you trying to use the symbols variable as? Can you share the rest of you're script? More details give us better ideas as to what the actual problem is.
 
Old 11-14-2008, 11:45 AM   #9
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You are defining the variable symbol as a string by using the "" (double quotes). You do not need to use the escape character before characters used as strings. The exception to this rule are the special characters $ (dollar sign) ` (backtick) and \ (backslash).

To do what you are doing you need to use:

Code:
     symbols="! # \$ % & \' ( ) * + , - . / : ; & < = > ? @ [ \\ ] ^ _ { | } ~"
 
Old 11-14-2008, 12:11 PM   #10
Dr_Death_UAE
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thanks guys, that solve the problem.

* is also need slash before it. \*
 
Old 11-14-2008, 12:48 PM   #11
H_TeXMeX_H
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You could also do:

Code:
echo '"! # $ % & '\'' ( ) * + , - . / : ; & < = > ? @ [ \ ] ^ _ { | } ~"'
 
  


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