Sponsored Content
Top Forums Shell Programming and Scripting Sed delete blank lines upto first pattern match Post 302597893 by duonut on Sunday 12th of February 2012 08:54:36 PM
Old 02-12-2012
Sed delete blank lines upto first pattern match

Hi
Im trying to do the following in sed. I want to delete any blank line at the start of a file until it matches a pattern and then stops. for example:

Input

Quote:
1

2

3
4
pattern:

5
output:

Quote:
1
2
3
4
pattern:

5
I have got it to work within a range of two patterns with the following:

sed '/1/,/pattern/{/^[[:blank:]]*$/d}'

The problem is that it will carry on in the file and if there is another match it will act on that. I only want it to act once.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to delete lines do NOT match a pattern

On Unix, it is easy to get those lines that match a pattern, by grep pattern file or those lines that do not, by grep -v pattern file but I am editing a file on Windows with Ultraedit. Ultraedit support regular expression based search and replace. I can delete all the lines that match a... (1 Reply)
Discussion started by: JumboGeng
1 Replies

2. Shell Programming and Scripting

SED: match pattern & delete matched lines

Hi all, I have the following data in a file x.csv: > ,this is some text here > ,,,,,,,,,,,,,,,,2006/11/16,0.23 > ,,,,,,,,,,,,,,,,2006/12/16,0.88 < ,,,,,,,,,,,,,,,,this shouldnt be deleted I need to use SED to match anything with a > in the line and delete that line, can someone help... (7 Replies)
Discussion started by: not4google
7 Replies

3. Shell Programming and Scripting

delete blank lines with sed

I have a text file with blank lines fullfilled with spaces and others only containing the "Enter" caracter, the \012. I would like to eliminate all them with the sed command. Is it possible? making: sed '/^$/d' <file should delete the blank lines but doesn't work for the lines that only... (2 Replies)
Discussion started by: tmxps
2 Replies

4. Shell Programming and Scripting

Delete a block of text delimited by blank lines when pattern is found

I have a file which contains blocks of text - each block is a multi-lines text delimited by blank lines eg. <blank line> several lines of text ... pattern found on this line several more lines of text ... <blank line> How do you delete the block of text (including the blank lines) when... (17 Replies)
Discussion started by: gleu
17 Replies

5. Shell Programming and Scripting

Sed to delete exactly match pattern and print them in other file

Hi there, I need help about using sed. Iam using sed to delete and print lines that match the port number as listed in sedfile. I am using -d and -p command for delete match port and print them respectively. However, the output is not synchonize where the total deleted lines is not similar with... (3 Replies)
Discussion started by: new_buddy
3 Replies

6. Shell Programming and Scripting

sed problem - delete all lines until a match on 2 lines

First of all, I know this can be more eassily done with perl or other scripting languages but, that's not the issue. I need this in sed. (or wander if it's possible ) I got a file (trace file to recreate the control file from oracle for the dba boys) which contains some lines another line... (11 Replies)
Discussion started by: plelie2
11 Replies

7. Shell Programming and Scripting

delete block of lines when pattern does not match

I have this input file that I need to remove lines which represents more than 30 days of processing. Input file: On 11/17/2009 at 12:30:00, Program started processing...argc=7 Total number of bytes in file being processed is 390 Message buffer of length=390 was allocated successfully... (1 Reply)
Discussion started by: udelalv
1 Replies

8. Shell Programming and Scripting

Delete lines based on pattern match

BASH in Solaris 10 I have a log file like below. Whenever the pattern ORA-39083 is encountered, I want to delete the line which has this pattern and 3 lines below it. $ cat someLogfile.txt ORA-39083: Object type OBJECT_GRANT failed to create with error: ORA-01917: user or role 'CMPA' does... (4 Replies)
Discussion started by: kraljic
4 Replies

9. Shell Programming and Scripting

sed one liner to Delete blank lines - Help required

Hi, cat test.txt BlankLine BlankLine BlankLine BlankLine ello hi helo BlankLine BlankLine heylo BlankLine BlankLine BlankLine done BlankLine BlankLine BlankLine (1 Reply)
Discussion started by: TomG
1 Replies

10. UNIX for Beginners Questions & Answers

sed script to delete the last word after a last pattern match

Hi Guys , I am having a file as stated below File 1 sa0 -- i_core/i_core_apb/i_afe0_controller/U261/A sa0 -- i_core/i_core_apb/i_afe0_controller/U265/Z sa1 -- i_core/i_core_apb/i_afe0_controller/U265/A sa1 -- i_core/i_core_apb/i_afe0_controller/U268/Z sa1 -- ... (7 Replies)
Discussion started by: kshitij
7 Replies
Tcl_StringMatch(3)					      Tcl Library Procedures						Tcl_StringMatch(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tcl_StringMatch, Tcl_StringCaseMatch - test whether a string matches a pattern SYNOPSIS
#include <tcl.h> int Tcl_StringMatch(string, pattern) int Tcl_StringCaseMatch(string, pattern, nocase) ARGUMENTS
char *string (in) String to test. char *pattern (in) Pattern to match against string. May contain special characters from the set *?[]. int nocase (in) Specifies whether the match should be done case-sensitive (0) or case-insensitive (1). _________________________________________________________________ DESCRIPTION
This utility procedure determines whether a string matches a given pattern. If it does, then Tcl_StringMatch returns 1. Otherwise Tcl_StringMatch returns 0. The algorithm used for matching is the same algorithm used in the ``string match'' Tcl command and is similar to the algorithm used by the C-shell for file name matching; see the Tcl manual entry for details. | In Tcl_StringCaseMatch, the algorithm is the same, but you have the option to make the matching case-insensitive. If you choose this (by | passing nocase as 1), then the string and pattern are essentially matched in the lower case. KEYWORDS
match, pattern, string Tcl 8.1 Tcl_StringMatch(3)
All times are GMT -4. The time now is 12:34 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy