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Top Forums UNIX for Beginners Questions & Answers Insert text after the first occurance of searched string entry in a file Post 303040488 by mohtashims on Wednesday 30th of October 2019 08:19:05 AM
Old 10-30-2019
Insert text after the first occurance of searched string entry in a file

My server xml file has huge data part of which i'm sharing below.

Quote:
<!--
<Connector port="8443" protocol="org.apache.coyote.http11.Http11AprProtocol"
maxThreads="150" SSLEnabled="true" >
<UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" />
<SSLHostConfig>
<Certificate certificateKeyFile="conf/localhost-rsa-key.pem"
certificateFile="conf/local-rsa-cert.pem"
type="RSA" />
</SSLHostConfig>
</Connector>
-->

<!-- Define an AJP 1.3 Connector on port 8009 -->
......
......
I wish to add the below text held by variable "addthisline" after the closing braces i.e --> once the first </Connector> tag is found.
Code:
addthisline="I need to be inserted after the comments"

Thus my searchstring is "</Connector>" and i need keep looking for the next "-->" entry post which I need to add the line contained in $addthisline

This injection should happen only for the first instance of " </Connector>" string found in the file.

Expected Output:

Quote:
<!--
<Connector port="8443" protocol="org.apache.coyote.http11.Http11AprProtocol"
maxThreads="150" SSLEnabled="true" >
<UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" />
<SSLHostConfig>
<Certificate certificateKeyFile="conf/localhost-rsa-key.pem"
certificateFile="conf/local-rsa-cert.pem"
type="RSA" />
</SSLHostConfig>
</Connector>
-->

I need to be inserted after the comments

<!-- Define an AJP 1.3 Connector on port 8009 -->
......
......
Unfortunately, I just know how to add the text after the string is found using sed '/pattern/a some text here' filename

I'm using bash shell script on Redhat Linux 7.

Requesting suggestions.
 

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XmTextFieldReplace(library call)										  XmTextFieldReplace(library call)

NAME
XmTextFieldReplace -- A TextField function that replaces part of a text string SYNOPSIS
#include <Xm/TextF.h> void XmTextFieldReplace( Widget widget, XmTextPosition from_pos, XmTextPosition to_pos, char * value); DESCRIPTION
XmTextFieldReplace replaces part of the text string in the TextField widget. The character positions begin at 0 (zero) and are numbered sequentially from the beginning of the text. An example text replacement would be to replace the second and third characters in the text string. To accomplish this, the parameter from_pos must be 1 and to_pos must be 3. To insert a string after the fourth character, both parameters, from_pos and to_pos, must be 4. This routine calls the widget's XmNvalueChangedCallback and verification callbacks, either XmNmodifyVerifyCallback or XmNmodifyVerifyCall- backWcs, or both. If both verification callback lists are registered, the procedures of the XmNmodifyVerifyCallback list are executed first and the resulting data is passed to the XmNmodifyVerifyCallbackWcs callbacks. The XmNmotionVerifyCallback is generated if to_pos is less than or equal to the cursor position and the length of value is not the same as the length of the text being replaced, or if the cursor position is between from_pos and to_pos, and the distance from the cursor position to from_pos is greater than the length of value. widget Specifies the TextField widget ID from_pos Specifies the start position of the text to be replaced to_pos Specifies the end position of the text to be replaced value Specifies the character string value to be added to the text widget For a complete definition of TextField and its associated resources, see XmTextField(3). RELATED
XmTextField(3). XmTextFieldReplaceWcs(3). XmTextFieldReplace(library call)
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