03-27-2009
Search for a pattern in a file and print previous lines from a particular point
Hi,
I am new to ksh scripting and I have a problem.
I have a file in which I have to search for a particular pattern say 'a' then from that line I need to search for another pattern say 'b' in the previous lines and thne print the file from pattern 'b' till the end of file.
For eg:
============
aaaaaaaa
bbbbbbbb
ccccccccc
dddddddddd
eeeeeeeee
==================
Now I need to search for string ccccccc from there I need to search for the first occrance of ===== pattern and from that point I need to print till the end of the file. This is so complicated because the pattern repeats in a similar way in the file.
I know this is very confusing
please let me know if i need to clarify anything thats mentioned above
Last edited by umaislearning; 04-01-2009 at 12:12 PM..
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LEARN ABOUT MOJAVE
tcl_stringmatch
Tcl_StringMatch(3) Tcl Library Procedures Tcl_StringMatch(3)
__________________________________________________________________________________________________________________________________________________
NAME
Tcl_StringMatch, Tcl_StringCaseMatch - test whether a string matches a pattern
SYNOPSIS
#include <tcl.h>
int
Tcl_StringMatch(str, pattern)
int
Tcl_StringCaseMatch(str, pattern, flags)
ARGUMENTS
const char *str (in) String to test.
const char *pattern (in) Pattern to match against string. May contain special characters from the set *?[].
int flags (in) OR-ed combination of match flags, currently only TCL_MATCH_NOCASE. 0 specifies a case-sensitive search.
_________________________________________________________________
DESCRIPTION
This utility procedure determines whether a string matches a given pattern. If it does, then Tcl_StringMatch returns 1. Otherwise
Tcl_StringMatch returns 0. The algorithm used for matching is the same algorithm used in the string match Tcl command and is similar to
the algorithm used by the C-shell for file name matching; see the Tcl manual entry for details.
In Tcl_StringCaseMatch, the algorithm is the same, but you have the option to make the matching case-insensitive. If you choose this (by
passing TCL_MATCH_NOCASE), then the string and pattern are essentially matched in the lower case.
KEYWORDS
match, pattern, string
Tcl 8.5 Tcl_StringMatch(3)