Shell Programming and Scripting

hi,
i am a SED newbie and i need some help. i have a log file as shown below. and i want to search specific Error Code, and fetch the whole paragraph.

[2009-02-01 15:42:51,630] ...
[2009-02-01 16:52:51,683] ...
.................
....ErrCode...
.................
[2009-02-01 17:49:33,686] ...
[2009-02-01 17:59:00,000] ...
[2009-02-01 18:52:50,000] ...
.................
....ErrCode...





let's say, i want to search "ErrCode" and it will show me that. how can i do this with SED :

[2009-02-02 16:52:51,683] ...
.................
....ErrCode...
.................
[2009-02-01 18:52:50,000] ...
.................
....ErrCode...





thanks..

You'll need a beginning and ending paragraph search string.
This may be easier in awk, also....

But try:

Code:

sed -n '/first_string/,/second_string/p' file_in

If your "paragraphs" are separated by blank lines:

Code:

sed -e '/./{H;$!d;}' -e 'x;/ErrCode/!d;'

(reference: http://sed.sourceforge.net/sed1line.txt. Very good reference for sed )

i mean timestamps with "paragraphs". this is an error log as you guess.

Input file looks like:

Code:

ant 1
bat 2
cat 3
dog 4
emu 5
fox 6
ant 7
bat 8
cat 9
dog 10
emu 11
fox 12
ant 13
bat 14
cat 15
dog 16
emu 17
fox 18
ant 19
bat 20
cat 21
dog 22
emu 23
fox 24

Substitute 'dog' and 'fox' with your search strings:

Code:

cat a |
awk '
  /dog/{ print_ind = 1; }
  { if ( print_ind == 1 ){ print; }}
  /fox/{ print_ind = 0; }'