ConfigWrite

Author: Instructor (talk, contrib)

Page for NSIS 2.07 and below users

You can use the latest version of headers (recommended) or the following function code (put the function code in your script before calling it)

Function Description

____________________________________________________________________________
 
                            ConfigWrite v1.1
____________________________________________________________________________
 
 
Write value from entry name in config file.
 
 
Syntax:
${ConfigWrite} "[File]" "[Entry]" "[Value]" $var
 
"[File]"      ; config file
              ;
"[Entry]"     ; entry name
              ;
"[Value]"     ; value name
              ;  if "" then delete Entry
              ;
$var          ; Result:
              ;    $var=CHANGED  Value is written
              ;    $var=DELETED  Entry is deleted
              ;    $var=ADDED    Entry and Value are added
              ;    $var=SAME     Entry and Value already exist
 
 
Note:
-Error flag if file isn't exist
-Error flag if file can't be opened

Example1:

Section
	${ConfigWrite} "C:\AUTOEXEC.BAT" "SET winbootdir=" "D:\WINDOWS" $R0
	;$R0=CHANGED
SectionEnd

Example2:

Section
	${ConfigWrite} "C:\apache\conf\httpd.conf" "Timeout " "30" $R0
	;$R0=SAME
SectionEnd

Example3:

Section
	${ConfigWrite} "C:\apache\conf\httpd.conf" "Timeout " "" $R0
	;$R0=DELETED
SectionEnd

Function Code

Function ConfigWrite
	!define ConfigWrite `!insertmacro ConfigWriteCall`
 
	!macro ConfigWriteCall _FILE _ENTRY _VALUE _RESULT
		Push `${_FILE}`
		Push `${_ENTRY}`
		Push `${_VALUE}`
		Call ConfigWrite
		Pop ${_RESULT}
	!macroend
 
	Exch $2
	Exch
	Exch $1
	Exch
	Exch 2
	Exch $0
	Exch 2
	Push $3
	Push $4
	Push $5
	Push $6
	ClearErrors
 
	IfFileExists $0 0 error
	FileOpen $3 $0 a
	IfErrors error
 
	StrLen $0 $1
	StrCmp $0 0 0 readnext
	StrCpy $0 ''
	goto close
 
	readnext:
	FileRead $3 $4
	IfErrors add
	StrCpy $5 $4 $0
	StrCmp $5 $1 0 readnext
 
	StrCpy $5 0
	IntOp $5 $5 - 1
	StrCpy $6 $4 1 $5
	StrCmp $6 '$\r' -2
	StrCmp $6 '$\n' -3
	StrCpy $6 $4
	StrCmp $5 -1 +3
	IntOp $5 $5 + 1
	StrCpy $6 $4 $5
 
	StrCmp $2 '' change
	StrCmp $6 '$1$2' 0 change
	StrCpy $0 SAME
	goto close
 
	change:
	FileSeek $3 0 CUR $5
	StrLen $4 $4
	IntOp $4 $5 - $4
	FileSeek $3 0 END $6
	IntOp $6 $6 - $5
 
	System::Alloc $6
	Pop $0
	FileSeek $3 $5 SET
	System::Call 'kernel32::ReadFile(i r3, i r0, i $6, t.,)'
	FileSeek $3 $4 SET
	StrCmp $2 '' +2
	FileWrite $3 '$1$2$\r$\n'
	System::Call 'kernel32::WriteFile(i r3, i r0, i $6, t.,)'
	System::Call 'kernel32::SetEndOfFile(i r3)'
	System::Free $0
	StrCmp $2 '' +3
	StrCpy $0 CHANGED
	goto close
	StrCpy $0 DELETED
	goto close
 
	add:
	StrCmp $2 '' 0 +3
	StrCpy $0 SAME
	goto close
	FileSeek $3 -1 END
	FileRead $3 $4
	IfErrors +4
	StrCmp $4 '$\r' +3
	StrCmp $4 '$\n' +2
	FileWrite $3 '$\r$\n'
	FileWrite $3 '$1$2$\r$\n'
	StrCpy $0 ADDED
 
	close:
	FileClose $3
	goto end
 
	error:
	SetErrors
	StrCpy $0 ''
 
	end:
	Pop $6
	Pop $5
	Pop $4
	Pop $3
	Pop $2
	Pop $1
	Exch $0
FunctionEnd