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Full Discussion: Help needed in search string
Top Forums UNIX for Dummies Questions & Answers Help needed in search string Post 302146732 by bakunin on Thursday 22nd of November 2007 03:52:53 AM
Old 11-22-2007
Lets see if i have understood you correctly:

you search for a string of the form "<string1>\<string2>" and want to write it to a file. Then you search for strings of the form "<string1>\" or "\<string2>" and write it to another file.

This is done with pattern matching. You can use either sed or awk for that, in this case i would suggest sed because it is smaller than awk and you don't need the capabilities awk would offer.

The string "<string1>/<string2>" can be found with the regexp:

Code:
[^ ][^ ]*\\[^ ][^ ]*

This searches for one or more non-spaces ("[^ ][^ ]*") followed by a backslash followed by one or more non-spaces. The "\" has to be escaped because it has a special meaning, therefore "\\".

The second form of strings can be found by two regexps, very similar to the first one:

Code:
" \\[^ ][^ ]*" and
"[^ ][^ ]*\\ "

A space followed by a backslash followed by one or more non-spaces or one or more non-spaces followed by a backslash followed by a space.

Write the found lines to two different files and you are done.

If you need further help feel free to ask.

bakunin
 

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ShellQuote(3)						User Contributed Perl Documentation					     ShellQuote(3)

NAME
String::ShellQuote - quote strings for passing through the shell SYNOPSIS
$string = shell_quote @list; $string = shell_quote_best_effort @list; $string = shell_comment_quote $string; DESCRIPTION
This module contains some functions which are useful for quoting strings which are going to pass through the shell or a shell-like object. shell_quote [string]... shell_quote quotes strings so they can be passed through the shell. Each string is quoted so that the shell will pass it along as a single argument and without further interpretation. If no strings are given an empty string is returned. If any string can't be safely quoted shell_quote will croak. shell_quote_best_effort [string]... This is like shell_quote, excpet if the string can't be safely quoted it does the best it can and returns the result, instead of dying. shell_comment_quote [string] shell_comment_quote quotes the string so that it can safely be included in a shell-style comment (the current algorithm is that a sharp character is placed after any newlines in the string). This routine might be changed to accept multiple string arguments in the future. I haven't done this yet because I'm not sure if the strings should be joined with blanks ($") or nothing ($,). Cast your vote today! Be sure to justify your answer. EXAMPLES
$cmd = 'fuser 2>/dev/null ' . shell_quote @files; @pids = split ' ', `$cmd`; print CFG "# Configured by: ", shell_comment_quote($ENV{LOGNAME}), " "; BUGS
Only Bourne shell quoting is supported. I'd like to add other shells (particularly cmd.exe), but I'm not familiar with them. It would be a big help if somebody supplied the details. AUTHOR
Roderick Schertler <roderick@argon.org> SEE ALSO
perl(1). perl v5.16.3 2010-06-11 ShellQuote(3)
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