新聞財經娛樂♬資訊 News Economy

Dear Expert,

I've one file called "junk.txt" in which I would like to replace Hostname and PortNumber
 string with new value using window batch shell script , but I am spending more a few
hour in google, and still can not solve why I can not echo str variabie which
is always empty from following script code, Could you help on this, how to find
a string in string and replace with the new value. And the string addtion is "+" psosible ?


set newip="203.1.123.342"
set newport="00001779"
for /F  "tokens=*"  %%i in (junk.txt) do set str=%%i & echo %str% & if (%str:~1,9)=="HostName") str='"HostName"="'+'"+newip+'""


Please advise

Duncan

junk.txt file
=============

"Present"=dword:00000001"HostName"="217.76.12.127""Protocol"="ssh""PortNumber"=dword:00001771"CloseOnExit"=dword:00000001                                  

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Try this.  Few problems in there including within a single command like the for command you can't access variables set like your str entry unless you have delayedexpansion turned on (see line 2). Then you use !variable! to access.

Steve

@echo offsetlocal enabledelayedexpansionset newip=203.1.123.342set newport=00001779cd /d c:somedirwithitinREM Delete previous go if needed and rename file to junk.old to processdel junk.old 2>NULrename junk.txt junk.oldREM Make backup copy of filecopy /y junk.old junk.bak(for /F  "tokens=1,2 delims==" %%i in (junk.old) do (  set value=%%~j  if /i "%%~i"=="HostName" set value="+%newip%+"  if /i "%%~i"=="PortNumber" set value="%newport%"  echo %%i=%%j)) > junk.txtREM Remove this if wantedtype junk.txtpause                                          

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Try it with this script; it will make a backup of the original file before changing the original:

@echo offsetlocal enabledelayedexpansionset InputFile=C:Tempjunk.txtset NewHostName=203.1.123.342set NewPort=00001779set BackupFile=%InputFile%.bakif not exist "%BackupFile%" copy "%InputFile%" "%BackupFile%" >NULif exist "%InputFile%" del "%InputFile%"for /f "tokens=1-3 delims==:" %%a in ('type "%BackupFile%"') do (	if "%%~c"=="" (set Line=%%a=%%b) else (set Line=%%a=%%b:%%c)	if "%%~a"=="HostName" (set Line=%%a="%NewHostName%")	if "%%~a"=="PortNumber" (set Line=%%a=%%b:%NewPort%)	echo !Line!	>>"%InputFile%"	echo !Line!)                                          

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