Redirecting Output from within Batch file

Question

I am creating a batch file with some simple commands to gather information from a system  The batch file contains commands to get the time  IP information  users  etc     I assembled all the commands in a batch file  and it runs  but I would like the batch file  when run to output the results to a text file  log   Is there a command that I can add to the batch that would do so     Keep in mind I do not want to run the batch from cmd  then redirect output   I want to redirect the output from inside the batch  if that is possible

User · Answer

Add these two lines near the top of your batch file  all stdout and stderr after will be redirected to log txt   if not   1    STDOUT TO FILE    0 STDOUT TO FILE      gt log txt 2 gt  amp 1 shift  1

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Adding the following lines at the bottom of your batch file will grab everything just as displayed inside the CMD window and export into a text file  powershell -c  quot  wshell   New-Object -ComObject wscript shell   wshell SendKeys   a   powershell -c  quot  wshell   New-Object -ComObject wscript shell   wshell SendKeys   c   powershell Get-Clipboard  gt  MyLog txt  It basically performs a select all - gt  copy into clipboard - gt  paste into text file

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if you want both out and err streams redirected  dir  gt  gt  a txt 2 gt  amp 1

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echo some output  gt  your logfile    or     echo some output  echo more output   gt  Your logfile    should fill the bill   If you want to APPEND the output  use  gt  gt  instead of  gt    gt  will start a new logfile

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The simple naive way that is slow because it opens and positions the file pointer to End-Of-File multiple times    echo off command1  gt output txt command2  gt  gt output txt     commandN  gt  gt output txt   A better way - easier to write  and faster because the file is opened and positioned only once    echo off  gt output txt     command1   command2         commandN     Another good and fast way that only opens and positions the file once   echo off call  sub  gt output txt exit  b   sub command1 command2     commandN   Edit 2020-04-17  Every now and then you may want to repeatedly write to two or more files  You might also want different messages on the screen  It is still possible to to do this efficiently by redirecting to undefined handles outside a parenthesized block or subroutine  and then use the  amp  notation to reference the already opened files   call  sub 9 gt File1 txt 8 gt File2 txt exit  b   sub echo Screen message 1  gt  amp 9 File 1 message 1  gt  amp 8 File 2 message 1 echo Screen message 2  gt  amp 9 File 1 message 2  gt  amp 8 File 2 message 2 exit  b   I chose to use handles 9 and 8 in reverse order because that way is more likely to avoid potential permanent redirection due to a Microsoft redirection implementation design flaw when performing multiple redirections on the same command  It is highly unlikely  but even that approach could expose the bug if you try hard enough  If you stage the redirection than you are guaranteed to avoid the problem   3 gt File1 txt   4 gt File2 txt call  sub  exit  b   sub etc

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There is a cool little program you can use to redirect the output to a file and the console  some command      TEE BAT    -a    filename     x000D   x000D   ECHO OFF x000D     Check Windows version x000D  IF NOT   OS     Windows NT  GOTO Syntax x000D   x000D     Keep variables local x000D  SETLOCAL x000D   x000D     Check command line arguments x000D  SET Append 0 x000D  IF  I   1    -a    x000D   SET Append 1 x000D   SHIFT x000D    x000D  IF       1      GOTO Syntax x000D  IF NOT   2      GOTO Syntax x000D   x000D     Test for invalid wildcards x000D  SET Counter 0 x000D  FOR  F   A IN   DIR  A  B  1 2  gt NUL   DO CALL  Count     fA  x000D  IF  Counter  GTR 1   x000D   SET Counter  x000D   GOTO Syntax x000D    x000D   x000D     A valid filename seems to have been specified x000D  SET File  1 x000D   x000D     Check if a directory with the specified name exists x000D  DIR  AD  File   gt NUL 2 gt NUL x000D  IF NOT ERRORLEVEL 1   x000D   SET File  x000D   GOTO Syntax x000D    x000D   x000D     Specify  Y switch for Windows 2000   XP COPY command x000D  SET Y  x000D  VER   FIND  Windows NT   gt  NUL x000D  IF ERRORLEVEL 1 SET Y  Y x000D   x000D     Flush existing file or create new one if -a wasn t specified x000D  IF  Append   0  COPY  Y  NUL  File   gt  NUL 2 gt  amp 1  x000D   x000D     Actual TEE x000D  FOR  F  tokens 1  delims      A IN   FIND  N  V      DO   x000D    gt   CON    ECHO   B x000D    gt  gt   File  ECHO   B x000D    x000D   x000D     Done x000D  ENDLOCAL x000D  GOTO EOF x000D   x000D   Count x000D  SET  A Counter    1 x000D  SET File  1 x000D  GOTO EOF x000D   x000D   Syntax x000D  ECHO  x000D  ECHO Tee bat   Version 2 11a for Windows NT 4   2000   XP x000D  ECHO Display text on screen and redirect it to a file simultaneously x000D  ECHO  x000D  IF NOT   OS     Windows NT  ECHO Usage   some command      TEE BAT    -a    filename x000D  IF NOT   OS     Windows NT  GOTO Skip x000D  ECHO Usage   some command      TEE BAT    -a    filename x000D   Skip x000D  ECHO  x000D  ECHO Where    some command  is the command whose output should be redirected x000D  ECHO          filename      is the file the output should be redirected to x000D  ECHO         -a             appends the output of the command to the file  x000D  ECHO                        rather than overwriting the file x000D  ECHO  x000D  ECHO Written by Rob van der Woude x000D  ECHO http   www robvanderwoude com x000D  ECHO Modified by Kees Couprie x000D  ECHO http   kees couprie org x000D  ECHO and Andrew Cameron x000D   x000D   x000D

User · Answer

I know this is an older post  but someone will stumble across it in a Google search and it also looks like some questions the OP asked in comments weren t specifically addressed  Also  please go easy on me since this is my first answer posted on SO      To redirect the output to a file using a dynamically generated file name  my go-to  read  quick  amp  dirty  approach is the second solution offered by  dbenham  So for example  this    echo off  gt  filename prefix- DATE  -4 - DATE  4 2 - DATE  7 2   time  0 2  time  3 2  time  6 2  log   echo Your Name Here echo Beginning Date Time   DATE  -4 - DATE  4 2 - DATE  7 2   time  0 2  time  3 2  time  6 2  log REM do some stuff here echo Your Name Here echo Ending Date Time   DATE  -4 - DATE  4 2 - DATE  7 2   time  0 2  time  3 2  time  6 2  log     Will create a file like what you see in this screenshot of the file in the target directory  That will contain this output   Your Name Here Beginning Date Time  2016-09-16 141048 log Your Name Here Ending Date Time  2016-09-16 141048 log   Also keep in mind that this solution is locale-dependent  so be careful how when you use it

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echo off  gt output txt   echo Checking your system infor  Please wating     systeminfo   findstr  c  Host Name   systeminfo   findstr  c  Domain   ipconfig  all   find  Physical Address    ipconfig   find  IPv4   ipconfig   find  Default Gateway       pause

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This may fail in the case of  toxic  characters in the input  Considering an input like thisIsAnIn    put is a good way how to get understand what is going on  Sure there is a rule that an input string MUST be inside double quoted marks but I have a feeling that this rule is a valid rule only if the meaning of the input is a location on a NTFS partition  maybe it is a rule for URLs I am not sure   But it is not a rule for an arbitrary input string of course  it is  a good practice  but you cannot count with it

User · Answer

echo OFF  your command   gt  gt   Your log file name  txt   I used the command above in my batch file and it works  In the log file  it shows the results of my command

[windows] Redirecting Output from within Batch file

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