How can I check free space during a NullSoft silent install?
Question
In silent install mode the user is not asked about the installation target with the PageEx directory
, and therefore the functions DirVerify
and GetInstDirError
are never called.
This is also applicable to installs that hardcode the installation target (a bad idea) for the same reason as above: the PageEx directory
is never invoked.
Solution
Your sample code is ok, but calling ${DriveSpace} on Win9x could fail. I also removed the need to specify the section id's
!define APPNAME "CalcEnoughSpace"
name "${APPNAME}"
outfile "$%temp%\${APPNAME}.exe"
ShowInstDetails show
RequestExecutionLevel user
installdir "$Temp"
AllowRootDirInstall true
!include Sections.nsh
!include LogicLib.nsh
Function .onInit
push $instdir
call VerifyFreeSpace
pop $0
${If} $0 < 1
MessageBox mb_iconstop "Not enough free space!"
${EndIf}
FunctionEnd
page instfiles
Section !a
AddSize 10000
SectionEnd
Section /o b
AddSize 10000
SectionEnd
SectionGroup grp
Section c
AddSize 10000
SectionEnd
SectionGroupEnd
Function VerifyFreeSpace
System::Store s
pop $0 ;path to check
Push 0 ;default to no
System::Call 'kernel32::GetDiskFreeSpaceEx(tr0,*l.r1,*l,*l)i.r2'
${If} $2 < 1
StrCpy $0 $0 3
System::Call 'kernel32::GetDiskFreeSpace(tr0,*i.r1,*i.r2,*i.r3,*i)i.r4'
IntCmpU $4 0 ret
IntOp $1 $1 * $2
System::Int64Op $1 * $3
pop $1
${EndIf}
System::Int64Op $1 / 1024 ;to kb
pop $1
StrCpy $4 0 ;size
StrCpy $2 0 ;section idx
loop:
ClearErrors
SectionGetFlags $2 $3
IfErrors testspace
IntOp $3 $3 & ${SF_SELECTED}
${If} $3 <> 0
SectionGetSize $2 $3
IntOp $4 $4 + $3
${EndIf}
IntOp $2 $2 + 1
goto loop
testspace:
pop $2 ;throw away default return value
System::Int64Op $1 > $4
ret:
System::Store l
FunctionEnd
I only did limited testing, hopefully there are no bugs :)
OTHER TIPS
I wrote a function called CheckFreeSpace
in NSIS to do this. Unfortunately it has the following limitations:
- To compute the size of all the sections in your installation, you have to modify
CheckFreeSpace
to add each section, by knowing each variable that each section id was written into. I can't find a way of iterating over all sections that will be installed using NSIS. - Installation drive must be computed because
${DriveSpace}
requires a drive letter, not a path to an arbitrary directory. The drive letter string is computed withStrCpy $instdrive $INSTDIR 3
. If the$INSTDIR
variable is a relative path or does not begin with a string such asC:\
, this will fail. - If the installation cannot continue it produces a
MessageBox
. You can suppress theMessageBox
by adding/SD IDOK
at the end of the statement, but then the user is not informed of the installation failure: I can't find a way to emit tostdout
from NSIS. Perhaps the return code from the installer is enough? - If the disk free space is really low (like 10kb), the installer won't run at all; it doesn't have space to unpack its temporary DLL's into the
\tmp
directory.
Also, in my implementation below, CheckFreeSpace
has a hardcoded value for the space free after installation. Obviously that can be parameterized.
Here it is within a sample installer:
!include FileFunc.nsh
!insertmacro DriveSpace
Name "CheckFreeSpace"
OutFile "C:\CheckFreeSpace.exe"
InstallDir C:\tmp\checkfreespace
Page instfiles
Section "install_section" install_section_id
Call CheckFreeSpace
CreateDirectory $INSTDIR
SetOutPath $INSTDIR
File "C:\installme.bat"
WriteUninstaller "$INSTDIR\Uninstall.exe"
DetailPrint "Installation Successful."
SectionEnd
Section "Uninstall"
RMDIR /r "$INSTDIR"
SectionEnd
Function CheckFreeSpace
var /GLOBAL installsize
var /GLOBAL adjustedinstallsize
var /GLOBAL freespace
var /GLOBAL instdrive
; Verify that we have sufficient space for the install
; SectionGetSize returns the size of each section in kilobyte.
SectionGetSize ${install_section_id} $installsize
; Adjust the required install size by 10mb, as a minimum amount
; of free space left after installation.
IntOp $adjustedinstallsize $installsize + 10240
; Compute the drive that is the installation target; the
; ${DriveSpace} macro will not accept a path, it must be a drive.
StrCpy $instdrive $INSTDIR 3
; Compute drive space free in kilobyte
${DriveSpace} $instdrive "/D=F /S=K" $freespace
DetailPrint "Determined installer needs $adjustedinstallsize kb ($installsize kb) while $freespace kb is free"
IntCmp $adjustedinstallsize $freespace spaceok spaceok
MessageBox MB_OK|MB_ICONSTOP "Insufficient space for installation. Please free space for installation directory $INSTDIR and try again."
DetailPrint "Insufficient space for installation. Installer needs $adjustedinstallsize kb, but freespace is only $freespace kb."
Abort "Insufficient space for installation."
spaceok:
DetailPrint "Installation target space is sufficient"
FunctionEnd
Do you have a sample script for silent install?