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Full Discussion: regular expressions
Top Forums UNIX for Advanced & Expert Users regular expressions Post 302319926 by ramky79 on Tuesday 26th of May 2009 02:20:11 PM
Old 05-26-2009
regular expressions

I have a flat file with the following drug names

Nutropin AQ 20mg PEN Cart 2ml
Norditropin Cart 15mg/1.5ml


I have to extract digits that are before mg i.e 20 and 15 ; how to do this using regular expressions

Thanks
ram
 

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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 a regular expression to the current audit search expression. The search conditions can then be used to scan logs, files, or buffers for something of interest. The regular expression follows the posix extended regular expression conventions, and is matched against the full record (without interpreting field values). If an existing search expression E is already defined, this function replaces it by (E && this_regexp). 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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