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Full Discussion: display few lines of the file
Top Forums UNIX for Dummies Questions & Answers display few lines of the file Post 50556 by Ygor on Tuesday 27th of April 2004 07:14:25 AM
Old 04-27-2004
Driver,

My point was that in awk you can use start/end pairs. i.e. two patterns or conditions sepated by a comma. All you have to do is determine what the conditions are.

My post works with the sample supplied. But with the sample you have supplied, the end condition might be "/^}$/" , i.e. a line that is one "}" on its own with no whitespace. So you would have...

awk '/sub foo/,/^}$/' file

...which could be the simplest solution, but perhaps more work is needed.

It would be more efficient to use "exit" to stop reading the file when the end condition is reached. The idea of counting matched braces can be coded more simply as ....

awk '/sub foo/,0 {print;b+=gsub("\{","{");b-=gsub("\}","}");if(b==0)exit}' file
 

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LEARN ABOUT MINIX

grep

GREP(1) 						      General Commands Manual							   GREP(1)

NAME

       grep - search a file for lines containing a given pattern

SYNOPSIS

       grep [-elnsv] pattern [file] ...

OPTIONS

       -e     -e pattern is the same as pattern

       -c     Print a count of lines matched

       -i     Ignore case

       -l     Print file names, no lines

       -n     Print line numbers

       -s     Status only, no printed output

       -v     Select lines that do not match

EXAMPLES

       grep mouse file	   # Find lines in file containing mouse

       grep [0-9] file	   # Print lines containing a digit

DESCRIPTION

       Grep  searches  one  or	more  files (by default, stdin) and selects out all the lines that match the pattern.  All the regular expressions
       accepted by ed and mined are allowed.  In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or  1
       occurrences,  and  |  can  be used between two regular expressions to mean either one of them.  Parentheses can be used for grouping.  If a
       match is found, exit status 0 is returned.  If no match is found, exit status 1 is returned.  If an error is detected,  exit  status  2	is
       returned.

SEE ALSO

       cgrep(1), fgrep(1), sed(1), awk(9).

																	   GREP(1)
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