Sponsored Content
Full Discussion: pattern matching question
Top Forums Shell Programming and Scripting pattern matching question Post 302515596 by aoussenko on Wednesday 20th of April 2011 01:06:38 PM
Old 04-20-2011
pattern matching question

Hi Guys
I am trying to check if the pattern "# sign followed by one or several tabs till the end of the line" exists in my file. I am using the following query:
Code:
$ cat myfile | nawk '{if(/^#\t*$/) print "T"}'

Unfortunately it does not return the desired output since I know for sure that the line with the mention above pattern exists in the file.
May be someone can spot my error, thanks a lot
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

pattern matching + perl question

i can only find the first occurance of a pattern how do i set it to loop untill all occurances have changed. #! /usr/bin/perl use POSIX; open (DFH_FILE, "./dfh") or die "Can not read file ($!)"; foreach (<DFH_FILE>) { if ($_ !~ /^#|^$/) { chomp; ... (1 Reply)
Discussion started by: Optimus_P
1 Replies

2. Shell Programming and Scripting

Pattern matching question

Hi guys, I have the following expression : typeset EXBYTEC_CHK=`egrep ^"+${PNUM}" /bb/data/firmexbytes.dta` can anybody please explain to me what ^"+${PNUM}" stands for in egrep statement? Thanks -A (3 Replies)
Discussion started by: aoussenko
3 Replies

3. Shell Programming and Scripting

SED Question: Search and Replace start of line to matching pattern

Hi guys, got a problem here with sed on the command line. If i have a string as below: online xx:wer:xcv: sdf:/asdf/http:https-asdfd How can i match the pattern "http:" and replace the start of the string to the pattern with null? I tried the following but it doesn't work: ... (3 Replies)
Discussion started by: DrivesMeCrazy
3 Replies

4. Shell Programming and Scripting

Pattern matching question

Hi, I am writing a simple log parsing system and have a question on pattern matching. It is simply grep -v -f patterns.re /var/log/all.log Now, I have the following in my logs Apr 16 07:33:17 ad-font-dc1 EvntSLog: AD-FONT-DC1/NTDS ISAM (700) - "NTDS (384) NTDSA: Online defragmentation... (5 Replies)
Discussion started by: wpfontenot
5 Replies

5. Shell Programming and Scripting

pattern matching question

Hi guys, I have a file in the following format: 4222 323K 323L D222 494 8134 A023 A024 49 812A 9871 9872 492 A961 A962 A963 491 0B77 0B78 0B79 495 0B7A 0B7B 0B7C 4949 WER9 444L 999O I need to grep the line... (5 Replies)
Discussion started by: aoussenko
5 Replies

6. Shell Programming and Scripting

Pattern matching question

Hi Guys, I am trying to setup a check for the string using an "if" statement. The valid entry is only the one which contain Numbers and Capital Alpha-Numeric characters, for example: BA6F, BA6E, BB21 etc... I am using the following "if" constract to check the input, but it fails allowing Small... (3 Replies)
Discussion started by: aoussenko
3 Replies

7. Shell Programming and Scripting

sed pattern matching question

I inherited a script that contains the following sed command: sed -n -e '/^.*ABCD|/p' $fileName | sed -e 's/^.*ABCD|//' | sed -e 's/|ABCD$//' > ${fileName}.tmp What I'm wondering is whether ABCD has a special pattern matching value in sed, such as a character class similar or identical to . ... (9 Replies)
Discussion started by: topmhat
9 Replies

8. Shell Programming and Scripting

pattern matching question

Hi guys I have the following case statement in my script: case $pn.$db in *?.fcp?(db)) set f ${pn} cp ;; *?.oxa?(oxa) ) set oxa $pn ;; esac Can somebody help me to understand how to interpret *?.fcp?(db)) or *?.oxa?(oxa) ? I cannot figure out how in this case pattern maching... (5 Replies)
Discussion started by: aoussenko
5 Replies

9. UNIX for Dummies Questions & Answers

Perl Pattern Matching Question

Hi all, I have a pattern matching problem in which i'm not sure how to attack. Here is my problem: I have a list of strings that appear in the following format: String: LE_(1234 ABC)^2^ABC^DEFG What i need to do is replace all the characters after the first ^ with blank. So the output... (2 Replies)
Discussion started by: WongSifu
2 Replies

10. Shell Programming and Scripting

Bash pattern matching question

I need to check the condition of a variable before the script continues and it needs to match a specific pattern such as EPS-03-0 or PDF-02-1. The first part is a 3 or 4 letter string followed by a hyphen, then a 01,02 or 03 followed by a hyphen then a 0 or a 1. I know I could check for every... (4 Replies)
Discussion started by: stormcel
4 Replies
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 01:45 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy