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Full Discussion: How to find out whether a file exists with the help of regular expression?
Top Forums Shell Programming and Scripting How to find out whether a file exists with the help of regular expression? Post 302705169 by radoulov on Monday 24th of September 2012 10:57:19 AM
Old 09-24-2012
Quote:
Originally Posted by alister
That won't work either. If no file matches the pattern, the pattern remains unmodified and will be assigned to the array as is.

Some shells can be told to replace unmatched patterns with a null string (e.g. bash's shopt -s nullglob), but this is not the default, standard-compliant behavior.
Absolutely right, Alister!
Thanks for pointing this out!

For zsh: setopt nullglob or your_pattern(N).
For ksh93: ~(N)your_pattern.

In some cases dotglob could also be desirable.

If none of the above shells is available:
Code:
for f in *EQST*; do
  if [ -e "$f" ]; then 
    echo exist  
    break
  fi
done

Last edited by radoulov; 09-24-2012 at 12:17 PM..
 

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LEARN ABOUT CENTOS

ausearch_add_regex

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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