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Top Forums Shell Programming and Scripting sed - replacing on the right of a pattern and looking for exact word? Post 302450044 by rich@ardz on Wednesday 1st of September 2010 11:05:51 AM
Old 09-01-2010
Lightbulb sed - replacing on the right of a pattern and looking for exact word?

how would you get SED to do the following, say you have the following lines in a text file:

user=tigger
some text some text
some text some text
some text some text
user=ted
some text some text
some text some text
some text some text
user=thekingofrockandroll

you want to find any line which has 'user=[the user name]' and replace it with 'user=xxx'

so the string after the 'user=' will always contain a different number of characters but you just want to sed to find any lines with 'user=' and replace the part after 'user=' with 'xxx' no matter what?

and...

if what to replace say 'AM' in a text file with 'JO', i can do:

Code:
sed 's/AM/JO/g;s/am/jo/g'

but what if the text file where i'm running this looks like this:

AM
TAME
am
jammy

I only want to replace the following lines with 'JO':

AM
am

so I want to leave 'TAME' and 'jammy' in there - the sed above will give this:

JO
TJOE
jo
JJOMY

I want:

JO
TAME
jo
jammy

how do you achieve that with SED?

Cheers! Smilie

Last edited by rich@ardz; 09-01-2010 at 12:07 PM.. Reason: Code tags :)
 

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DwtCSTextReplace(3Dwt)													    DwtCSTextReplace(3Dwt)

Name
       DwtCSTextReplace - Replaces a portion of the current text in the compound-string text widget or inserts some new text into the current text
       of the compound-string text widget.

Syntax
       void DwtCSTextReplace(widget, from_pos, to_pos, value)
	    Widget widget;
	    int from_pos, to_pos;
	    DwtCompString value;

Arguments
       widget	 Specifies the ID of the compound-string text widget.

       from_pos  Specifies the first character position of the compound-string text being replaced.

       to_pos	 Specifies the last character position of the compound-string text being replaced.

       value	 Specifies the text to replace part of the current text in the compound-string text widget.

Description
       The DwtCSTextReplace function replaces part of the text in the compound-string text widget.  Within  the  widget,  positions  are  numbered
       starting  at  0 and increasing sequentially.  For example, to replace the second and third characters in the text, from_pos should be 1 and
       to_pos should be 3.  To insert text after the fourth character, from_pos and to_pos should both be 4.

See Also
       DwtCSText(3Dwt), DwtCSTextCreate(3Dwt), DwtCSTextSetString(3Dwt),  DwtCSTextGetEditable(3Dwt),  DwtCSTextSetEditable(3Dwt),  DwtCS-
       TextGetMaxLength(3Dwt), DwtCSTextSetMaxLength(3Dwt), DwtCSTextSetSelection(3Dwt), DwtCSTextGetSelection(3Dwt)
       Guide to the XUI Toolkit: C Language Binding
       Guide to the XUI Toolkit Intrinsics: C Language Binding

															    DwtCSTextReplace(3Dwt)
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