Re: ~/.bashrc problem

[Olive <olive.lin@versateladsl.be>]

Kuang He wrote:
> 2005/4/15, Robert Vangel <robert@vangelr.net.au>:
>
> > Using " should work, or if you want a literal " you would use \" but
> > this would break it...
>
>
> Using " works most of the time, but, if you encouter some URL like 
> http://bbs.ustc.edu.cn/cgi/sf?bid=260&aof=M425dea7e&fn=23.jpg
> It does not work properly.

The fact is that you must convice bash to pass the url to wget without 
modification.

Let's see a few examples


[oesser@logic-pc1 ~]$ a="hello"
[oesser@logic-pc1 ~]$ echo "$a"
hello

However the expansion is done only once; characters inside the variable 
a itself is not expanded anymore:

[oesser@logic-pc1 ~]$ hello="good morning"
[oesser@logic-pc1 ~]$ a='$hello'     # character inside single quote are
                                     # not expanded
[oesser@logic-pc1 ~]$ echo "$a"      # expand the variable $a but once
                                     # it is done do not try to expands
                                     # the variable $hello
$hello


So if you use "$1" it will work whatever characters are present in $1. 
But if you use a URL directly written on the command line, not stored in 
a variable; you must enclose it in single quote to prevent expansion of 
"variables" which might be present in the URL.

Olive