regular expression not working.


 
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# 1  
Old 06-18-2009
regular expression not working.

Hi,

I have to match a certain pattern of string in my shell script:

6.0.4.11.9
7.5.1.7.1

First Number can be 6 or 7
Second number can be 0 or 5
Rest all numbers can be between 1-99

I am using following egrep:

Code:
 
egrep ^\[6-7\].\[0\|5\].\[1-99\].\[1-99\].\[1-99\]$ filename

But why is the above regular expression not allowing the following set of patterns:
7.5.1.10.1
6.0.4.11.9

Please help,
Thanks.
# 2  
Old 06-18-2009
'[1-99]' - means 1 through 9 OR 9 - not 1 through 99
Code:
egrep '^[67]\.[05]\.[1-9][1-9]*\.[1-9][1-9]*\.[1-9][1-9]*$' myFile

My egrep (Solaris) does not support '\{m,n\}:
Code:
  /usr/bin/egrep
     The /usr/bin/egrep utility accepts full regular  expressions
     as described on the regexp(5) manual page, except for \( and
     \), \( and \), \{ and \}, \< and \>, and \n,  and  with  the
     addition of:

If yours does, you could:
Code:
egrep '^[67]\.[05]\.[1-9]\{1,2\}\.[1-9]\{1,2\}\.[1-9]\{1,2\}$' myFile

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