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# 1  
Old 03-21-2007
search a long line
Hey all, I need to retrieve something from a line, say

<TEST><A>123</A><B>456</B><ID>1111</ID><C>789</C><D>000</D></TEST><TEST><A>123</A><B>456</B><ID>2222</ID><C>789</C><D>000</D></TEST>


I need to match <ID>111</ID>, so I want to retrieve

<ID>1111</ID><C>789</C><D>000</D></TEST>

is this possible, can anyone help? Thank you!
# 2  
Old 03-21-2007
Code:
sed "s;\(</TEST>\)\(<TEST>\);\1\\
\2;g" f | sed -n "s/.*\(<ID>1\{1,\}.*\)/\1/p"

Last edited by anbu23; 03-21-2007 at 07:05 AM.. Reason: Removed filename at the end of command
# 3  
Old 03-21-2007
I don't quite get what exactly that command does, do you mind explain it a little? Thanks!
# 4  
Old 03-21-2007
if you have Python and know the language, here's an alternative:
Code:
#!/usr/bin/python
import sys
choice=sys.argv[1]
for line in open("file"):
     for li in line.split("<TEST>"):	
	  if "<ID>%s</ID>" % choice in li:
	       ind = li.index("<ID>1111</ID>")
	       print li[ind:]

output:
Code:
# ./test.py 1111
<ID>1111</ID><C>789</C><D>000</D></TEST>

Last edited by ghostdog74; 03-21-2007 at 08:21 AM..
# 5  
Old 03-21-2007
Code:
$ cat file
<TEST><A>123</A><B>456</B><ID>1111</ID><C>789</C><D>000</D></TEST><TEST><A>123</A><B>456</B><ID>2222</ID><C>789</C><D>000</D></TEST>

First sed separates TEST tags into separate lines
Code:
$ sed "s;\(</TEST>\)\(<TEST>\);\1\\
> \2;g" file
<TEST><A>123</A><B>456</B><ID>1111</ID><C>789</C><D>000</D></TEST>
<TEST><A>123</A><B>456</B><ID>2222</ID><C>789</C><D>000</D></TEST>

Second sed matches <ID>1</ID> to till end of the line
1\{1,\} matches from one 1 to n number of 1s.
for example matches 1, 11, 111, 1111 and so on
Code:
$ sed "s;\(</TEST>\)\(<TEST>\);\1\\
> \2;g" file | sed -n "s/.*\(<ID>1\{1,\}.*\)/\1/p"
<ID>1111</ID><C>789</C><D>000</D></TEST>

# 6  
Old 03-21-2007
but my ID is random, say 28654..then what should I do?
# 7  
Old 03-21-2007
Code:
id="28654"
sed "s;\(</TEST>\)\(<TEST>\);\1\\
\2;g" file | sed -n "s/.*\(<ID>${id}.*\)/\1/p"
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