Assign command output to variable in batch file

Question

I m trying to assign the output of a command to a variable - as in  I m trying to set the current flash version to a variable  I know this is wrong  but this is what I ve tried   set var reg query hklm SOFTWARE Macromedia FlashPlayer CurrentVersion gt    or  reg query hklm SOFTWARE Macromedia FlashPlayer CurrentVersion  gt  gt  set var   Yeah  as you can see I m a bit lost  Any and all help is appreciated

User · Answer

You can t assign a process output directly into a var  you need to parse the output with a For  F loop    Echo OFF  FOR  F  Tokens 2      A IN        Reg Query  HKEY CURRENT USER Software Macromedia FlashPlayer   v  CurrentVersion     DO       REM Set  Version   B      Echo Version    B    Pause amp Exit   http   ss64 com nt for f html  PS  Change the reg key used if needed

User · Answer

This post has a method to achieve this     from  zvrba    You can do it by redirecting the output to a file first  For example     echo zz  gt  bla txt set  p VV  lt bla txt echo  VV

User · Answer

Okay here some more complex sample for the use of For  F     Main  prompt - G     call  REGQUERY   Software Classes CLSID  3E6AE265-3382-A429-56D1-BB2B4D1D     goto  EOF   REGQUERY    Checks HKEY LOCAL MACHINE  and HKEY CURRENT USER      for the key and lists its content       call  EXEC  REG QUERY  HKCU   1       call  EXEC  REG QUERY  HKLM   1     goto  EOF       EXEC      set output        for  F  delims     i in     1 2  gt nul   do            set output   i             if not   output                 echo  1 -  gt   output          goto  EOF   I packed it into the sub function  EXEC so all of its nasty details of implementation doesn t litters the main script  So it got some kinda some batch tutorial  Notes  bout the code    the output from the command executed via call  EXEC command is stored in  output   Batch cmd doesn t cares about scopes so  output  will be also available in the main script  the   the beginning is just decoration and there to suppress echoing the command line  You may delete them all and just put some  echo off at the first line is really dislike that  However like this I find debugging much more nice   Decoration Number two is prompt - G  It s there to make command prompt look like this -   I use    instead of rem the tilde    in   1 is to remove quotes from the first argument 2  nul is there to suppress discard stderr error output  Normally you would do it via 2 nul  Well the   the batch escape char is there avoids to early resolving the redirector     There s some simulare use a little later in the script  echo  1 -  gt     so there   makes it possible the output a     via echo what else wouldn t have been possible  even if the compare at  if not   output      looks like in most common programming languages - it s maybe different that you expected  if you re not used to MS-batch   Well remove the     at the beginning  Study the output  Change it tonot  output     -rerun and consider why this doesn t work

User · Answer

This is work for me   FOR  f  delims    i in   reg query hklm SOFTWARE Macromedia FlashPlayer CurrentVersion   DO set var  i echo  var

User · Answer

A method has already been devised  however this way you don t need a temp file   for  f  delims     i in   command   do set output   i   However  I m sure this has its own exceptions and limitations

[batch-file] Assign command output to variable in batch file

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