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rcull's Avatar
rcull is offline rcull
2010-03-11 , 19:23
Posts: 299 | Thanked: 168 times | Joined on Jun 2006 @ Wales UK
#21
try

Code:
if /sbin/ifconfig usb0 > /dev/null 2>&1
then
    echo Running
else
    echo Not Running
fi
Rick
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lma is offline lma
2010-03-11 , 20:03
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#22
Originally Posted by eitama View Post
The thing that is not working is the * (asterisks).
Try a pattern matching expression, like this:
Code:
if [ "${my#*bc}" != "$my" ]
 
gobuki's Avatar
gobuki is offline gobuki
2010-03-11 , 20:22
Posts: 60 | Thanked: 46 times | Joined on Jan 2010 @ Europe
#23
Originally Posted by lma View Post
Try a pattern matching expression, like this:
Code:
if [ "${my#*bc}" != "$my" ]
Just to mention it: this is a bash feature and not supported by standard shells/busybox.
You should really install a shell with better scripting support if you need regex and follow the countless shell-scripting tutorials on the net - unless maybe you want to deploy it elsewhere. Just make sure you're reading a tutorial for the right shell, since shell scripting != shell scripting.
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Last edited by gobuki; 2010-03-11 at 20:29. Reason: added: if you need regex
 
lma is offline lma
2010-03-12 , 05:38
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#24
Originally Posted by gobuki View Post
Just to mention it: this is a bash feature and not supported by standard shells/busybox.
Wrong, try it!
 
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gobuki is offline gobuki
2010-03-12 , 12:32
Posts: 60 | Thanked: 46 times | Joined on Jan 2010 @ Europe
#25
You are right! I tried it and it works. I'm sorry. But I wonder where this is documented. I had a look at busybox.net and couldn't find anything about scripting or regular expressions. Not even in the manual page: http://busybox.net/downloads/BusyBox.html

Care to give a keyword or link?
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SubCore is offline SubCore
2010-03-12 , 13:39
Posts: 850 | Thanked: 626 times | Joined on Sep 2009 @ Vienna, Austria
#26
the shell built into busybox is the "Almquist shell" (or, more precisely, the debian ash variant.)

your best bet for documentation would probably be this, that's the posix documentation for -compatible shells.
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CowboyFromHell is offline CowboyFromHell
2010-03-13 , 01:14
Posts: 17 | Thanked: 4 times | Joined on Mar 2010 @ Germany
#27
If you run linux on your PC and ash is installed:
> man ash
contains all of it. Unfortunately man and manpages are not preinstalled on N900 :°(
 
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