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Top Forums UNIX for Beginners Questions & Answers Identifiyng pattern within a block Post 302995751 by MadeInGermany on Tuesday 11th of April 2017 03:42:05 PM
Old 04-11-2017
Instead of the special RS you can perhaps store a line in a variable like this
Code:
awk -v search="GGCATGAAAACATACA" '/^@M/ {s=$0; next} $0~search {print s; c=2} (c && c--)' infile

And you can search at the beginning of a line with search="^GGCATGAAAACATACA"
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AUSEARCH_ADD_REGEX(3)						  Linux Audit API					     AUSEARCH_ADD_REGEX(3)

NAME
ausearch_add_regex - use regular expression search rule SYNOPSIS
#include <auparse.h> int ausearch_add_regex(auparse_state_t *au, const char *expr); DESCRIPTION
ausearch_add_regex adds one search condition based on regular expressions to the audit search API. The search conditions can then be used to scan logs, files, or buffers for something of interest. You may not use this in combination with any other search expression. The regu- lar expression follows the posix regular expression conventions. The search results are at the record level and not the field. RETURN VALUE
Returns -1 if an error occurs; otherwise, 0 for success. SEE ALSO
ausearch_add_expression(3), ausearch_add_item(3), ausearch_clear(3), ausearch_next_event(3), regcomp(3). AUTHOR
Steve Grubb Red Hat Sept 2007 AUSEARCH_ADD_REGEX(3)
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