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Full Discussion: Pattern matching in file and then display 10 lines above every time
Top Forums Shell Programming and Scripting Pattern matching in file and then display 10 lines above every time Post 302306644 by quirkasaurus on Monday 13th of April 2009 11:40:38 AM
Old 04-13-2009
brute force in ksh works juuuuust fine:

Code:
pattern=droberts

cat /etc/passwd |
while read line ; do

  lines[9]=${lines[8]}
  lines[8]=${lines[7]}
  lines[7]=${lines[6]}

  lines[6]=${lines[5]}
  lines[5]=${lines[4]}
  lines[4]=${lines[3]}

  lines[3]=${lines[2]}
  lines[2]=${lines[1]}
  lines[1]=${lines[0]}
  lines[0]=$line

  if [[ $line = *${pattern}* ]]; then

    for x in 9 8 7 6 5 4 3 2 1 0 ; do

      print "${lines[x]}"

    done

  fi

done

 

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LEARN ABOUT SUNOS

winsdelln

insdelln(3XCURSES)					  X/Open Curses Library Functions					insdelln(3XCURSES)

NAME

       insdelln, winsdelln - insert/delete lines to/from the window

SYNOPSIS

       cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib 
       -R /usr/xpg4/lib -lcurses [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       int insdelln(int n);

       int winsdelln(WINDOW *win, int n);

PARAMETERS

       n		       Is the number of lines to insert or delete (positive n inserts; negative n deletes).

       win		       Is a pointer to the window in which to insert or delete a line.

DESCRIPTION

       The  insdelln()	and  winsdelln() functions insert or delete blank  lines  in stdscr or win, respectively.  When n is positive, n lines are
       added before the current line  and the bottom n lines are lost; when n is negative, n lines  are deleted starting with  the  current  line,
       the remaining lines are moved up,  and the bottom n lines are cleared. The position of the cursor does not change.

RETURN VALUES

       On success, these functions return OK. Otherwise, they return ERR.

ERRORS

       None.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       deleteln(3XCURSES), insertln(3XCURSES), libcurses(3XCURSES), attributes(5), standards(5)

SunOS 5.10							    5 Jun 2002							insdelln(3XCURSES)
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