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Old 04-18-2008, 10:28 PM   #1
eddieboo
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Registered: Apr 2008
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How to parse in korn shell


Guys, I am having a problem, I have been using ksh script on my aix 52 that parse from the line and give me the file name but but when i try to use the same script on 5.3 it failed to parse,

here is my script line and sample output

InterfaceFile=/law/t803/law/test/interface/smsptrf/rfdc0xk_0418152945
HDR_MASK=/law/test/law/test/interface/smsptrf/

FileName=${InterfaceFile##${HDR_MASK}}

echo $FileName

output should be "rfdc0xk_0418152945" but it is showing me the whole line
/law/t803/law/test/interface/smsptrf/rfdc0xk_0418152945


any idea how can i fix or if there is any other way to get the same result please help me

eddie
 
Old 04-19-2008, 07:06 AM   #2
tronayne
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Registered: Oct 2003
Location: Northeastern Michigan, where Carhartt is a Designer Label
Distribution: Slackware 32- & 64-bit Stable
Posts: 3,541

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What you're trying to do is parameter expansion - substrings (yeah, yet another strange name for something). The general form is
Code:
${parameter#pattern} remove small left pattern
${parameter##pattern} remove large left pattern
${parameter%pattern} remove small right pattern
${parameter%%pattern} remove large right pattern
So,
Code:
InterfacFile=/law/t803/law/test/interface/smsptrf/rfdc0xk_0418152945
print ${InterfacFile##*/}
Produces
Code:
rfdc0xk_0418152945
The trick is the "##*/"

Hope this helps
 
  


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