Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: ksh pattern matching
Top Forums Shell Programming and Scripting ksh pattern matching Post 302166001 by ripat on Sunday 10th of February 2008 12:00:17 PM
Old 02-10-2008
Quote:
Originally Posted by drl
The "Patterns and Regular Expression" syntax uses:
Code:
*(exp), ?(exp), !(exp) ...

(...) These patterns could be used within double brackets, for example (...) but not with string operator syntax (as far as I know) -- page 113 ff, 144 ff.
They do partially work in my ksh version (1993-12-28 r):

Code:
var='jo mike and dave are good friends'

$ echo ${var//a?(re)/_}
# returns > jo mike _nd d_ve _ good friends

$ echo ${var//g*(o)/_}
#returns > jo mike and dave are _d friends

$ echo ${var//+(o)/_}
#returns > j_ mike and dave are g_d friends

$ echo ${var//@(jo|dave)/_}
#returns > _ mike and _ are good friends

All returns as expected but I try to use the !(exp) like the PCRE look behind assertions (?<=exp). Still trying...
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

comment/delete a particular pattern starting from second line of the matching pattern

Hi, I have file 1.txt with following entries as shown: 0152364|134444|10.20.30.40|015236433 0233654|122555|10.20.30.50|023365433 ** ** ** In file 2.txt I have the following entries as shown: 0152364|134444|10.20.30.40|015236433 0233654|122555|10.20.30.50|023365433... (4 Replies)
Discussion started by: imas
4 Replies

2. Shell Programming and Scripting

counting the lines matching a pattern, in between two pattern, and generate a tab

Hi all, I'm looking for some help. I have a file (very long) that is organized like below: >Cluster 0 0 283nt, >01_FRYJ6ZM12HMXZS... at +/99% 1 279nt, >01_FRYJ6ZM12HN12A... at +/99% 2 281nt, >01_FRYJ6ZM12HM4TS... at +/99% 3 283nt, >01_FRYJ6ZM12HM946... at +/99% 4 279nt,... (4 Replies)
Discussion started by: d.chauliac
4 Replies

3. Shell Programming and Scripting

sed - matching pattern one but not pattern two

All, I have the following file: -------------------------------------- # # /etc/pam.d/common-password - password-related modules common to all services # # This file is included from other service-specific PAM config files, # and should contain a list of modules that define the services... (2 Replies)
Discussion started by: RobertBerrie
2 Replies

4. Shell Programming and Scripting

Pattern matching in ksh

In the Korn shell is it possible to truncate a pattern like this: - ) ]] So that it is not necessary to enter 8 times? (2 Replies)
Discussion started by: steadyonabix
2 Replies

5. Shell Programming and Scripting

ksh Multiple Pattern Matching Operators

I figured this would be simple, but I am stuck. Variable longpath="/dir1/dir2/dir3/filename.stuff.morestuff.garbage" I want to end up with just "filename.extra.moreextra". So, I want to get rid of the path and .garbage I want to do this with just ksh internals. So, no sed,grep,awk,expr,... (4 Replies)
Discussion started by: Topaz
4 Replies

6. UNIX for Dummies Questions & Answers

Find pattern suffix matching pattern

Hi, I am trying to get a result out of this but fails please help. Have two files /tmp/1 & /tmp/hosts. /tmp/1 IP=123.456.789.01 WAS_HOSTNAME=abcdefgh.was.tb.dsdc /tmp/hosts 123.456.789.01 I want this result in /tmp/hosts if hostname is already there dont want duplicate entry. ... (5 Replies)
Discussion started by: rajeshwebspere
5 Replies

7. Shell Programming and Scripting

Sed: printing lines AFTER pattern matching EXCLUDING the line containing the pattern

'Hi I'm using the following code to extract the lines(and redirect them to a txt file) after the pattern match. But the output is inclusive of the line with pattern match. Which option is to be used to exclude the line containing the pattern? sed -n '/Conn.*User/,$p' > consumers.txt (11 Replies)
Discussion started by: essem
11 Replies

8. Shell Programming and Scripting

PHP - Regex for matching string containing pattern but without pattern itself

The sample file: dept1: user1,user2,user3 dept2: user4,user5,user6 dept3: user7,user8,user9 I want to match by '/^dept2.*/' but don't want to have substring 'dept2:' in output. How to compose such regex? (8 Replies)
Discussion started by: urello
8 Replies

9. UNIX for Dummies Questions & Answers

Grep -v lines starting with pattern 1 and not matching pattern 2

Hi all! Thanks for taking the time to view this! I want to grep out all lines of a file that starts with pattern 1 but also does not match with the second pattern. Example: Drink a soda Eat a banana Eat multiple bananas Drink an apple juice Eat an apple Eat multiple apples I... (8 Replies)
Discussion started by: demmel
8 Replies

10. Shell Programming and Scripting

Big pattern file matching within another pattern file in awk or shell

Hi I need to do a patten match between files . I am new to shell scripting and have come up with this so far. It take 50 seconds to process files of 2mb size . I need to tune this code as file size will be around 50mb and need to save time. Main issue is that I need to search the pattern from... (2 Replies)
Discussion started by: nitin_daharwal
2 Replies

LEARN ABOUT OPENDARWIN

fc-pattern

FC-PATTERN(1)															     FC-PATTERN(1)

NAME

       fc-pattern - parse and show pattern

SYNOPSIS

       fc-pattern [ -cdVh ]  [ --config ]  [ --default ]  [  [ -f format ]  [ --format format ]  ]  [ --version ]  [ --help ]

	[ pattern  [ element... ]   ]

DESCRIPTION

       fc-pattern  parses  pattern (empty pattern by default) and shows the parsed result.  If --config is given, config substitution is performed
       on the pattern before being displayed.  If --default is given, default substitution is performed on the pattern before being displayed.

       If any elements are specified, only those are printed.

OPTIONS

       This program follows the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is  included
       below.

       -c     Perform config substitution on pattern.

       -d     Perform default substitution on pattern.

       -f     Format output according to the format specifier format.

       -V     Show version of the program and exit.

       -h     Show summary of options.

       pattern
	      Parses and displays pattern (uses empty pattern by default).

       element
	      If set, the element property is displayed for parsed pattern.

SEE ALSO

       FcNameParse(3)  FcConfigSubstitute(3)  FcDefaultSubstitute(3)  FcPatternPrint(3)  FcPatternFormat(3)  fc-cat(1)	fc-cache(1) fc-list(1) fc-
       match(1) fc-query(1) fc-scan(1)

       The fontconfig user's guide, in HTML format: /usr/share/doc/fontconfig/fontconfig-user.html.

AUTHOR

       This manual page was updated by Behdad Esfahbod <behdad@behdad.org>.

								   Apr 20, 2010 						     FC-PATTERN(1)
All times are GMT -4. The time now is 07:23 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy